VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 26
-EXTRAVERSION = -rc9
+EXTRAVERSION =
NAME = Rotary Wombat
# *DOCUMENTATION*
KBUILD_AFLAGS += -gdwarf-2
endif
+ ifdef CONFIG_FTRACE
+ KBUILD_CFLAGS += -pg
+ endif
+
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
select HAVE_OPROFILE
select HAVE_KPROBES
select HAVE_KRETPROBES
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FTRACE
select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
select HAVE_ARCH_KGDB if !X86_VOYAGER
def_bool y
config HAVE_SETUP_PER_CPU_AREA
- def_bool X86_64 || (X86_SMP && !X86_VOYAGER)
+ def_bool X86_64_SMP || (X86_SMP && !X86_VOYAGER)
config HAVE_CPUMASK_OF_CPU_MAP
def_bool X86_64_SMP
config X86_HT
bool
depends on SMP
- depends on (X86_32 && !(X86_VISWS || X86_VOYAGER)) || X86_64
+ depends on (X86_32 && !X86_VOYAGER) || X86_64
default y
config X86_BIOS_REBOOT
bool
- depends on !X86_VISWS && !X86_VOYAGER
+ depends on !X86_VOYAGER
default y
config X86_TRAMPOLINE
If you don't know what to do here, say N.
+config X86_FIND_SMP_CONFIG
+ def_bool y
+ depends on X86_MPPARSE || X86_VOYAGER
+
+if ACPI
+config X86_MPPARSE
+ def_bool y
+ bool "Enable MPS table"
+ depends on X86_LOCAL_APIC
+ help
+ For old smp systems that do not have proper acpi support. Newer systems
+ (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
+endif
+
+if !ACPI
+config X86_MPPARSE
+ def_bool y
+ depends on X86_LOCAL_APIC
+endif
+
choice
prompt "Subarchitecture Type"
default X86_PC
config X86_VOYAGER
bool "Voyager (NCR)"
- depends on X86_32 && (SMP || BROKEN)
+ depends on X86_32 && (SMP || BROKEN) && !PCI
help
Voyager is an MCA-based 32-way capable SMP architecture proprietary
to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based.
If you do not specifically know you have a Voyager based machine,
say N here, otherwise the kernel you build will not be bootable.
+config X86_GENERICARCH
+ bool "Generic architecture"
+ depends on X86_32
+ help
+ This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
+ subarchitectures. It is intended for a generic binary kernel.
+ if you select them all, kernel will probe it one by one. and will
+ fallback to default.
+
+if X86_GENERICARCH
+
config X86_NUMAQ
bool "NUMAQ (IBM/Sequent)"
- depends on SMP && X86_32
+ depends on SMP && X86_32 && PCI && X86_MPPARSE
select NUMA
help
- This option is used for getting Linux to run on a (IBM/Sequent) NUMA
- multiquad box. This changes the way that processors are bootstrapped,
- and uses Clustered Logical APIC addressing mode instead of Flat Logical.
- You will need a new lynxer.elf file to flash your firmware with - send
- email to <Martin.Bligh@us.ibm.com>.
+ This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
+ NUMA multiquad box. This changes the way that processors are
+ bootstrapped, and uses Clustered Logical APIC addressing mode instead
+ of Flat Logical. You will need a new lynxer.elf file to flash your
+ firmware with - send email to <Martin.Bligh@us.ibm.com>.
config X86_SUMMIT
bool "Summit/EXA (IBM x440)"
This option is needed for IBM systems that use the Summit/EXA chipset.
In particular, it is needed for the x440.
- If you don't have one of these computers, you should say N here.
- If you want to build a NUMA kernel, you must select ACPI.
+config X86_ES7000
+ bool "Support for Unisys ES7000 IA32 series"
+ depends on X86_32 && SMP
+ help
+ Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
+ supposed to run on an IA32-based Unisys ES7000 system.
config X86_BIGSMP
- bool "Support for other sub-arch SMP systems with more than 8 CPUs"
+ bool "Support for big SMP systems with more than 8 CPUs"
depends on X86_32 && SMP
help
This option is needed for the systems that have more than 8 CPUs
and if the system is not of any sub-arch type above.
- If you don't have such a system, you should say N here.
-
-config X86_VISWS
- bool "SGI 320/540 (Visual Workstation)"
- depends on X86_32
- help
- The SGI Visual Workstation series is an IA32-based workstation
- based on SGI systems chips with some legacy PC hardware attached.
-
- Say Y here to create a kernel to run on the SGI 320 or 540.
-
- A kernel compiled for the Visual Workstation will not run on PCs
- and vice versa. See <file:Documentation/sgi-visws.txt> for details.
-
-config X86_GENERICARCH
- bool "Generic architecture (Summit, bigsmp, ES7000, default)"
- depends on X86_32
- help
- This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
- It is intended for a generic binary kernel.
- If you want a NUMA kernel, select ACPI. We need SRAT for NUMA.
-
-config X86_ES7000
- bool "Support for Unisys ES7000 IA32 series"
- depends on X86_32 && SMP
- help
- Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
- supposed to run on an IA32-based Unisys ES7000 system.
- Only choose this option if you have such a system, otherwise you
- should say N here.
+endif
config X86_RDC321X
bool "RDC R-321x SoC"
config X86_VSMP
bool "Support for ScaleMP vSMP"
select PARAVIRT
- depends on X86_64
+ depends on X86_64 && PCI
help
Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
supposed to run on these EM64T-based machines. Only choose this option
endchoice
+config X86_VISWS
+ bool "SGI 320/540 (Visual Workstation)"
+ depends on X86_32 && PCI && !X86_VOYAGER && X86_MPPARSE && PCI_GODIRECT
+ help
+ The SGI Visual Workstation series is an IA32-based workstation
+ based on SGI systems chips with some legacy PC hardware attached.
+
+ Say Y here to create a kernel to run on the SGI 320 or 540.
+
+ A kernel compiled for the Visual Workstation will run on general
+ PCs as well. See <file:Documentation/sgi-visws.txt> for details.
+
config SCHED_NO_NO_OMIT_FRAME_POINTER
def_bool y
prompt "Single-depth WCHAN output"
bool "VMI Guest support"
select PARAVIRT
depends on X86_32
- depends on !(X86_VISWS || X86_VOYAGER)
+ depends on !X86_VOYAGER
help
VMI provides a paravirtualized interface to the VMware ESX server
(it could be used by other hypervisors in theory too, but is not
bool "KVM paravirtualized clock"
select PARAVIRT
select PARAVIRT_CLOCK
- depends on !(X86_VISWS || X86_VOYAGER)
+ depends on !X86_VOYAGER
help
Turning on this option will allow you to run a paravirtualized clock
when running over the KVM hypervisor. Instead of relying on a PIT
config KVM_GUEST
bool "KVM Guest support"
select PARAVIRT
- depends on !(X86_VISWS || X86_VOYAGER)
+ depends on !X86_VOYAGER
help
This option enables various optimizations for running under the KVM
hypervisor.
config PARAVIRT
bool "Enable paravirtualization code"
- depends on !(X86_VISWS || X86_VOYAGER)
+ depends on !X86_VOYAGER
help
This changes the kernel so it can modify itself when it is run
under a hypervisor, potentially improving performance significantly
endif
-config MEMTEST_BOOTPARAM
- bool "Memtest boot parameter"
+config PARAVIRT_DEBUG
+ bool "paravirt-ops debugging"
+ depends on PARAVIRT && DEBUG_KERNEL
+ help
+ Enable to debug paravirt_ops internals. Specifically, BUG if
+ a paravirt_op is missing when it is called.
+
+config MEMTEST
+ bool "Memtest"
depends on X86_64
default y
help
This option adds a kernel parameter 'memtest', which allows memtest
- to be disabled at boot. If this option is selected, memtest
- functionality can be disabled with memtest=0 on the kernel
- command line. The purpose of this option is to allow a single
- kernel image to be distributed with memtest built in, but not
- necessarily enabled.
-
+ to be set.
+ memtest=0, mean disabled; -- default
+ memtest=1, mean do 1 test pattern;
+ ...
+ memtest=4, mean do 4 test patterns.
If you are unsure how to answer this question, answer Y.
-config MEMTEST_BOOTPARAM_VALUE
- int "Memtest boot parameter default value (0-4)"
- depends on MEMTEST_BOOTPARAM
- range 0 4
- default 0
- help
- This option sets the default value for the kernel parameter
- 'memtest', which allows memtest to be disabled at boot. If this
- option is set to 0 (zero), the memtest kernel parameter will
- default to 0, disabling memtest at bootup. If this option is
- set to 4, the memtest kernel parameter will default to 4,
- enabling memtest at bootup, and use that as pattern number.
-
- If you are unsure how to answer this question, answer 0.
-
-config ACPI_SRAT
- def_bool y
- depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
- select ACPI_NUMA
-
-config HAVE_ARCH_PARSE_SRAT
- def_bool y
- depends on ACPI_SRAT
-
config X86_SUMMIT_NUMA
def_bool y
- depends on X86_32 && NUMA && (X86_SUMMIT || X86_GENERICARCH)
+ depends on X86_32 && NUMA && X86_GENERICARCH
config X86_CYCLONE_TIMER
def_bool y
- depends on X86_32 && X86_SUMMIT || X86_GENERICARCH
+ depends on X86_GENERICARCH
config ES7000_CLUSTERED_APIC
def_bool y
Calgary anyway, pass 'iommu=calgary' on the kernel command line.
If unsure, say Y.
+config AMD_IOMMU
+ bool "AMD IOMMU support"
+ select SWIOTLB
+ depends on X86_64 && PCI && ACPI
+ help
+ With this option you can enable support for AMD IOMMU hardware in
+ your system. An IOMMU is a hardware component which provides
+ remapping of DMA memory accesses from devices. With an AMD IOMMU you
+ can isolate the the DMA memory of different devices and protect the
+ system from misbehaving device drivers or hardware.
+
+ You can find out if your system has an AMD IOMMU if you look into
+ your BIOS for an option to enable it or if you have an IVRS ACPI
+ table.
+
# need this always selected by IOMMU for the VIA workaround
config SWIOTLB
bool
3 GB of memory. If unsure, say Y.
config IOMMU_HELPER
- def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB)
+ def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
+config MAXSMP
+ bool "Configure Maximum number of SMP Processors and NUMA Nodes"
+ depends on X86_64 && SMP
+ default n
+ help
+ Configure maximum number of CPUS and NUMA Nodes for this architecture.
+ If unsure, say N.
+if MAXSMP
config NR_CPUS
- int "Maximum number of CPUs (2-255)"
- range 2 255
+ int
+ default "4096"
+endif
+
+if !MAXSMP
+config NR_CPUS
+ int "Maximum number of CPUs (2-4096)"
+ range 2 4096
depends on SMP
default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
default "8"
help
This allows you to specify the maximum number of CPUs which this
- kernel will support. The maximum supported value is 255 and the
+ kernel will support. The maximum supported value is 4096 and the
minimum value which makes sense is 2.
This is purely to save memory - each supported CPU adds
approximately eight kilobytes to the kernel image.
+endif
config SCHED_SMT
bool "SMT (Hyperthreading) scheduler support"
config X86_UP_APIC
bool "Local APIC support on uniprocessors"
- depends on X86_32 && !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH)
+ depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH)
help
A local APIC (Advanced Programmable Interrupt Controller) is an
integrated interrupt controller in the CPU. If you have a single-CPU
config X86_LOCAL_APIC
def_bool y
- depends on X86_64 || (X86_32 && (X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH))
+ depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
config X86_IO_APIC
def_bool y
- depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH))
+ depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
config X86_VISWS_APIC
def_bool y
config X86_MCE_P4THERMAL
bool "check for P4 thermal throttling interrupt."
- depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
+ depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP)
help
Enabling this feature will cause a message to be printed when the P4
enters thermal throttling.
config NUMA
bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
depends on SMP
- depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL)
+ depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
default n if X86_PC
- default y if (X86_NUMAQ || X86_SUMMIT)
+ default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
help
Enable NUMA (Non Uniform Memory Access) support.
The kernel will try to allocate memory used by a CPU on the
into virtual nodes when booted with "numa=fake=N", where N is the
number of nodes. This is only useful for debugging.
+if MAXSMP
+
+config NODES_SHIFT
+ int
+ default "9"
+endif
+
+if !MAXSMP
config NODES_SHIFT
- int "Max num nodes shift(1-9)"
- range 1 9 if X86_64
+ int "Maximum NUMA Nodes (as a power of 2)"
+ range 1 9 if X86_64
default "6" if X86_64
default "4" if X86_NUMAQ
default "3"
depends on NEED_MULTIPLE_NODES
+ help
+ Specify the maximum number of NUMA Nodes available on the target
+ system. Increases memory reserved to accomodate various tables.
+endif
config HAVE_ARCH_BOOTMEM_NODE
def_bool y
See <file:Documentation/mtrr.txt> for more information.
+config MTRR_SANITIZER
+ def_bool y
+ prompt "MTRR cleanup support"
+ depends on MTRR
+ help
+ Convert MTRR layout from continuous to discrete, so some X driver
+ could add WB entries.
+
+ Say N here if you see bootup problems (boot crash, boot hang,
+ spontaneous reboots).
+
+ Could be disabled with disable_mtrr_cleanup. Also mtrr_chunk_size
+ could be used to send largest mtrr entry size for continuous block
+ to hold holes (aka. UC entries)
+
+ If unsure, say Y.
+
+config MTRR_SANITIZER_ENABLE_DEFAULT
+ int "MTRR cleanup enable value (0-1)"
+ range 0 1
+ default "0"
+ depends on MTRR_SANITIZER
+ help
+ Enable mtrr cleanup default value
+
+config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
+ int "MTRR cleanup spare reg num (0-7)"
+ range 0 7
+ default "1"
+ depends on MTRR_SANITIZER
+ help
+ mtrr cleanup spare entries default, it can be changed via
+ mtrr_spare_reg_nr=
+
config X86_PAT
bool
prompt "x86 PAT support"
config CRASH_DUMP
bool "kernel crash dumps (EXPERIMENTAL)"
- depends on EXPERIMENTAL
depends on X86_64 || (X86_32 && HIGHMEM)
help
Generate crash dump after being started by kexec.
menuconfig APM
tristate "APM (Advanced Power Management) BIOS support"
- depends on X86_32 && PM_SLEEP && !X86_VISWS
+ depends on X86_32 && PM_SLEEP
---help---
APM is a BIOS specification for saving power using several different
techniques. This is mostly useful for battery powered laptops with
menu "Bus options (PCI etc.)"
config PCI
- bool "PCI support" if !X86_VISWS && !X86_VSMP
- depends on !X86_VOYAGER
+ bool "PCI support"
default y
select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
help
choice
prompt "PCI access mode"
- depends on X86_32 && PCI && !X86_VISWS
+ depends on X86_32 && PCI
default PCI_GOANY
---help---
On PCI systems, the BIOS can be used to detect the PCI devices and
config PCI_BIOS
def_bool y
- depends on X86_32 && !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
+ depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
config PCI_DIRECT
def_bool y
- depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC) || X86_VISWS)
+ depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
config PCI_MMCONFIG
def_bool y
config ISA
bool "ISA support"
- depends on !(X86_VOYAGER || X86_VISWS)
+ depends on !X86_VOYAGER
help
Find out whether you have ISA slots on your motherboard. ISA is the
name of a bus system, i.e. the way the CPU talks to the other stuff
source "drivers/eisa/Kconfig"
config MCA
- bool "MCA support" if !(X86_VISWS || X86_VOYAGER)
+ bool "MCA support" if !X86_VOYAGER
default y if X86_VOYAGER
help
MicroChannel Architecture is found in some IBM PS/2 machines and
If in doubt, say Y.
+config X86_VERBOSE_BOOTUP
+ bool "Enable verbose x86 bootup info messages"
+ default y
+ help
+ Enables the informational output from the decompression stage
+ (e.g. bzImage) of the boot. If you disable this you will still
+ see errors. Disable this if you want silent bootup.
+
config EARLY_PRINTK
bool "Early printk" if EMBEDDED
default y
config DEBUG_PER_CPU_MAPS
bool "Debug access to per_cpu maps"
depends on DEBUG_KERNEL
- depends on X86_64_SMP
+ depends on X86_SMP
default n
help
Say Y to verify that the per_cpu map being accessed has
on the VM subsystem for higher order allocations. This option
will also use IRQ stacks to compensate for the reduced stackspace.
-config X86_FIND_SMP_CONFIG
- def_bool y
- depends on X86_LOCAL_APIC || X86_VOYAGER
- depends on X86_32
-
-config X86_MPPARSE
- def_bool y
- depends on (X86_32 && (X86_LOCAL_APIC && !X86_VISWS)) || X86_64
-
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EMBEDDED
Add a simple leak tracer to the IOMMU code. This is useful when you
are debugging a buggy device driver that leaks IOMMU mappings.
+ config MMIOTRACE_HOOKS
+ bool
+
+ config MMIOTRACE
+ bool "Memory mapped IO tracing"
+ depends on DEBUG_KERNEL && PCI
+ select TRACING
+ select MMIOTRACE_HOOKS
+ default y
+ help
+ Mmiotrace traces Memory Mapped I/O access and is meant for
+ debugging and reverse engineering. It is called from the ioremap
+ implementation and works via page faults. Tracing is disabled by
+ default and can be enabled at run-time.
+
+ See Documentation/tracers/mmiotrace.txt.
+ If you are not helping to develop drivers, say N.
+
+ config MMIOTRACE_TEST
+ tristate "Test module for mmiotrace"
+ depends on MMIOTRACE && m
+ help
+ This is a dumb module for testing mmiotrace. It is very dangerous
+ as it will write garbage to IO memory starting at a given address.
+ However, it should be safe to use on e.g. unused portion of VRAM.
+
+ Say N, unless you absolutely know what you are doing.
+
#
# IO delay types:
#
# Makefile for the linux kernel.
#
-extra-y := head_$(BITS).o head$(BITS).o init_task.o vmlinux.lds
+extra-y := head_$(BITS).o head$(BITS).o head.o init_task.o vmlinux.lds
CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
+ ifdef CONFIG_FTRACE
+ # Do not profile debug utilities
+ CFLAGS_REMOVE_tsc_64.o = -pg
+ CFLAGS_REMOVE_tsc_32.o = -pg
+ CFLAGS_REMOVE_rtc.o = -pg
+ endif
+
#
# vsyscalls (which work on the user stack) should have
# no stack-protector checks:
nostackp := $(call cc-option, -fno-stack-protector)
CFLAGS_vsyscall_64.o := $(PROFILING) -g0 $(nostackp)
CFLAGS_hpet.o := $(nostackp)
-CFLAGS_tsc_64.o := $(nostackp)
+CFLAGS_tsc.o := $(nostackp)
obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
obj-y += traps_$(BITS).o irq_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o
-obj-y += setup_$(BITS).o i8259_$(BITS).o setup.o
+obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
+obj-$(CONFIG_X86_VISWS) += visws_quirks.o
+obj-$(CONFIG_X86_32) += probe_roms_32.o
obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
-obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o setup64.o
-obj-y += bootflag.o e820_$(BITS).o
+obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o
+obj-y += bootflag.o e820.o
obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o
obj-y += alternative.o i8253.o pci-nommu.o
-obj-$(CONFIG_X86_64) += bugs_64.o
-obj-y += tsc_$(BITS).o io_delay.o rtc.o
+obj-y += tsc.o io_delay.o rtc.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
obj-y += process.o
obj-$(CONFIG_X86_64_SMP) += tsc_sync.o smpcommon.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline_$(BITS).o
obj-$(CONFIG_X86_MPPARSE) += mpparse.o
-obj-$(CONFIG_X86_LOCAL_APIC) += apic_$(BITS).o nmi_$(BITS).o
+obj-$(CONFIG_X86_LOCAL_APIC) += apic_$(BITS).o nmi.o
obj-$(CONFIG_X86_IO_APIC) += io_apic_$(BITS).o
obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o
+ obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
obj-$(CONFIG_KEXEC) += machine_kexec_$(BITS).o
obj-$(CONFIG_KEXEC) += relocate_kernel_$(BITS).o crash.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump_$(BITS).o
obj-y += vsmp_64.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_MODULES) += module_$(BITS).o
-obj-$(CONFIG_ACPI_SRAT) += srat_32.o
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o
obj-$(CONFIG_KGDB) += kgdb.o
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
- obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o
+ obj-y += genapic_64.o genapic_flat_64.o genx2apic_uv_x.o tlb_uv.o
obj-$(CONFIG_X86_PM_TIMER) += pmtimer_64.o
obj-$(CONFIG_AUDIT) += audit_64.o
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
+ obj-$(CONFIG_AMD_IOMMU) += amd_iommu_init.o amd_iommu.o
obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
#include <asm/percpu.h>
#include <asm/dwarf2.h>
#include <asm/processor-flags.h>
-#include "irq_vectors.h"
+ #include <asm/ftrace.h>
+#include <asm/irq_vectors.h>
/*
* We use macros for low-level operations which need to be overridden
* for paravirtualization. The following will never clobber any registers:
* INTERRUPT_RETURN (aka. "iret")
* GET_CR0_INTO_EAX (aka. "movl %cr0, %eax")
- * ENABLE_INTERRUPTS_SYSCALL_RET (aka "sti; sysexit").
+ * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit").
*
* For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must
* specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY).
xorl %ebp,%ebp
TRACE_IRQS_ON
1: mov PT_FS(%esp), %fs
- ENABLE_INTERRUPTS_SYSCALL_RET
+ ENABLE_INTERRUPTS_SYSEXIT
CFI_ENDPROC
.pushsection .fixup,"ax"
2: movl $0,PT_FS(%esp)
.previous
END(native_iret)
-ENTRY(native_irq_enable_syscall_ret)
+ENTRY(native_irq_enable_sysexit)
sti
sysexit
-END(native_irq_enable_syscall_ret)
+END(native_irq_enable_sysexit)
#endif
KPROBE_ENTRY(int3)
RING0_INT_FRAME
addl $5*4, %esp /* remove xen-provided frame */
jmp sysenter_past_esp
+ CFI_ENDPROC
ENTRY(xen_hypervisor_callback)
CFI_STARTPROC
#endif /* CONFIG_XEN */
+ #ifdef CONFIG_FTRACE
+ #ifdef CONFIG_DYNAMIC_FTRACE
+
+ ENTRY(mcount)
+ pushl %eax
+ pushl %ecx
+ pushl %edx
+ movl 0xc(%esp), %eax
+ subl $MCOUNT_INSN_SIZE, %eax
+
+ .globl mcount_call
+ mcount_call:
+ call ftrace_stub
+
+ popl %edx
+ popl %ecx
+ popl %eax
+
+ ret
+ END(mcount)
+
+ ENTRY(ftrace_caller)
+ pushl %eax
+ pushl %ecx
+ pushl %edx
+ movl 0xc(%esp), %eax
+ movl 0x4(%ebp), %edx
+ subl $MCOUNT_INSN_SIZE, %eax
+
+ .globl ftrace_call
+ ftrace_call:
+ call ftrace_stub
+
+ popl %edx
+ popl %ecx
+ popl %eax
+
+ .globl ftrace_stub
+ ftrace_stub:
+ ret
+ END(ftrace_caller)
+
+ #else /* ! CONFIG_DYNAMIC_FTRACE */
+
+ ENTRY(mcount)
+ cmpl $ftrace_stub, ftrace_trace_function
+ jnz trace
+ .globl ftrace_stub
+ ftrace_stub:
+ ret
+
+ /* taken from glibc */
+ trace:
+ pushl %eax
+ pushl %ecx
+ pushl %edx
+ movl 0xc(%esp), %eax
+ movl 0x4(%ebp), %edx
+ subl $MCOUNT_INSN_SIZE, %eax
+
+ call *ftrace_trace_function
+
+ popl %edx
+ popl %ecx
+ popl %eax
+
+ jmp ftrace_stub
+ END(mcount)
+ #endif /* CONFIG_DYNAMIC_FTRACE */
+ #endif /* CONFIG_FTRACE */
+
.section .rodata,"a"
#include "syscall_table_32.S"
#include <asm/page.h>
#include <asm/irqflags.h>
#include <asm/paravirt.h>
+ #include <asm/ftrace.h>
.code64
+ #ifdef CONFIG_FTRACE
+ #ifdef CONFIG_DYNAMIC_FTRACE
+ ENTRY(mcount)
+
+ subq $0x38, %rsp
+ movq %rax, (%rsp)
+ movq %rcx, 8(%rsp)
+ movq %rdx, 16(%rsp)
+ movq %rsi, 24(%rsp)
+ movq %rdi, 32(%rsp)
+ movq %r8, 40(%rsp)
+ movq %r9, 48(%rsp)
+
+ movq 0x38(%rsp), %rdi
+ subq $MCOUNT_INSN_SIZE, %rdi
+
+ .globl mcount_call
+ mcount_call:
+ call ftrace_stub
+
+ movq 48(%rsp), %r9
+ movq 40(%rsp), %r8
+ movq 32(%rsp), %rdi
+ movq 24(%rsp), %rsi
+ movq 16(%rsp), %rdx
+ movq 8(%rsp), %rcx
+ movq (%rsp), %rax
+ addq $0x38, %rsp
+
+ retq
+ END(mcount)
+
+ ENTRY(ftrace_caller)
+
+ /* taken from glibc */
+ subq $0x38, %rsp
+ movq %rax, (%rsp)
+ movq %rcx, 8(%rsp)
+ movq %rdx, 16(%rsp)
+ movq %rsi, 24(%rsp)
+ movq %rdi, 32(%rsp)
+ movq %r8, 40(%rsp)
+ movq %r9, 48(%rsp)
+
+ movq 0x38(%rsp), %rdi
+ movq 8(%rbp), %rsi
+ subq $MCOUNT_INSN_SIZE, %rdi
+
+ .globl ftrace_call
+ ftrace_call:
+ call ftrace_stub
+
+ movq 48(%rsp), %r9
+ movq 40(%rsp), %r8
+ movq 32(%rsp), %rdi
+ movq 24(%rsp), %rsi
+ movq 16(%rsp), %rdx
+ movq 8(%rsp), %rcx
+ movq (%rsp), %rax
+ addq $0x38, %rsp
+
+ .globl ftrace_stub
+ ftrace_stub:
+ retq
+ END(ftrace_caller)
+
+ #else /* ! CONFIG_DYNAMIC_FTRACE */
+ ENTRY(mcount)
+ cmpq $ftrace_stub, ftrace_trace_function
+ jnz trace
+ .globl ftrace_stub
+ ftrace_stub:
+ retq
+
+ trace:
+ /* taken from glibc */
+ subq $0x38, %rsp
+ movq %rax, (%rsp)
+ movq %rcx, 8(%rsp)
+ movq %rdx, 16(%rsp)
+ movq %rsi, 24(%rsp)
+ movq %rdi, 32(%rsp)
+ movq %r8, 40(%rsp)
+ movq %r9, 48(%rsp)
+
+ movq 0x38(%rsp), %rdi
+ movq 8(%rbp), %rsi
+ subq $MCOUNT_INSN_SIZE, %rdi
+
+ call *ftrace_trace_function
+
+ movq 48(%rsp), %r9
+ movq 40(%rsp), %r8
+ movq 32(%rsp), %rdi
+ movq 24(%rsp), %rsi
+ movq 16(%rsp), %rdx
+ movq 8(%rsp), %rcx
+ movq (%rsp), %rax
+ addq $0x38, %rsp
+
+ jmp ftrace_stub
+ END(mcount)
+ #endif /* CONFIG_DYNAMIC_FTRACE */
+ #endif /* CONFIG_FTRACE */
+
#ifndef CONFIG_PREEMPT
#define retint_kernel retint_restore_args
#endif
#ifdef CONFIG_PARAVIRT
-ENTRY(native_irq_enable_syscall_ret)
- movq %gs:pda_oldrsp,%rsp
+ENTRY(native_usergs_sysret64)
swapgs
sysretq
#endif /* CONFIG_PARAVIRT */
.macro FAKE_STACK_FRAME child_rip
/* push in order ss, rsp, eflags, cs, rip */
xorl %eax, %eax
- pushq %rax /* ss */
+ pushq $__KERNEL_DS /* ss */
CFI_ADJUST_CFA_OFFSET 8
/*CFI_REL_OFFSET ss,0*/
pushq %rax /* rsp */
CFI_ADJUST_CFA_OFFSET -4
call schedule_tail
GET_THREAD_INFO(%rcx)
- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),threadinfo_flags(%rcx)
+ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
jnz rff_trace
rff_action:
RESTORE_REST
testl $3,CS-ARGOFFSET(%rsp) # from kernel_thread?
je int_ret_from_sys_call
- testl $_TIF_IA32,threadinfo_flags(%rcx)
+ testl $_TIF_IA32,TI_flags(%rcx)
jnz int_ret_from_sys_call
RESTORE_TOP_OF_STACK %rdi,ARGOFFSET
jmp ret_from_sys_call
movq %rcx,RIP-ARGOFFSET(%rsp)
CFI_REL_OFFSET rip,RIP-ARGOFFSET
GET_THREAD_INFO(%rcx)
- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%rcx)
+ testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP), \
+ TI_flags(%rcx)
jnz tracesys
cmpq $__NR_syscall_max,%rax
ja badsys
GET_THREAD_INFO(%rcx)
DISABLE_INTERRUPTS(CLBR_NONE)
TRACE_IRQS_OFF
- movl threadinfo_flags(%rcx),%edx
+ movl TI_flags(%rcx),%edx
andl %edi,%edx
jnz sysret_careful
CFI_REMEMBER_STATE
CFI_REGISTER rip,rcx
RESTORE_ARGS 0,-ARG_SKIP,1
/*CFI_REGISTER rflags,r11*/
- ENABLE_INTERRUPTS_SYSCALL_RET
+ movq %gs:pda_oldrsp, %rsp
+ USERGS_SYSRET64
CFI_RESTORE_STATE
/* Handle reschedules */
leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1
xorl %esi,%esi # oldset -> arg2
call ptregscall_common
-1: movl $_TIF_NEED_RESCHED,%edi
+1: movl $_TIF_WORK_MASK,%edi
/* Use IRET because user could have changed frame. This
works because ptregscall_common has called FIXUP_TOP_OF_STACK. */
DISABLE_INTERRUPTS(CLBR_NONE)
int_with_check:
LOCKDEP_SYS_EXIT_IRQ
GET_THREAD_INFO(%rcx)
- movl threadinfo_flags(%rcx),%edx
+ movl TI_flags(%rcx),%edx
andl %edi,%edx
jnz int_careful
- andl $~TS_COMPAT,threadinfo_status(%rcx)
+ andl $~TS_COMPAT,TI_status(%rcx)
jmp retint_swapgs
/* Either reschedule or signal or syscall exit tracking needed. */
movq %rsp,%rdi # &ptregs -> arg1
xorl %esi,%esi # oldset -> arg2
call do_notify_resume
-1: movl $_TIF_NEED_RESCHED,%edi
+1: movl $_TIF_WORK_MASK,%edi
int_restore_rest:
RESTORE_REST
DISABLE_INTERRUPTS(CLBR_NONE)
PTREGSCALL stub_clone, sys_clone, %r8
PTREGSCALL stub_fork, sys_fork, %rdi
PTREGSCALL stub_vfork, sys_vfork, %rdi
- PTREGSCALL stub_rt_sigsuspend, sys_rt_sigsuspend, %rdx
PTREGSCALL stub_sigaltstack, sys_sigaltstack, %rdx
PTREGSCALL stub_iopl, sys_iopl, %rsi
movl $_TIF_WORK_MASK,%edi
retint_check:
LOCKDEP_SYS_EXIT_IRQ
- movl threadinfo_flags(%rcx),%edx
+ movl TI_flags(%rcx),%edx
andl %edi,%edx
CFI_REMEMBER_STATE
jnz retint_careful
RESTORE_REST
DISABLE_INTERRUPTS(CLBR_NONE)
TRACE_IRQS_OFF
- movl $_TIF_NEED_RESCHED,%edi
GET_THREAD_INFO(%rcx)
- jmp retint_check
+ jmp retint_with_reschedule
#ifdef CONFIG_PREEMPT
/* Returning to kernel space. Check if we need preemption */
/* rcx: threadinfo. interrupts off. */
ENTRY(retint_kernel)
- cmpl $0,threadinfo_preempt_count(%rcx)
+ cmpl $0,TI_preempt_count(%rcx)
jnz retint_restore_args
- bt $TIF_NEED_RESCHED,threadinfo_flags(%rcx)
+ bt $TIF_NEED_RESCHED,TI_flags(%rcx)
jnc retint_restore_args
bt $9,EFLAGS-ARGOFFSET(%rsp) /* interrupts off? */
jnc retint_restore_args
apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
END(apic_timer_interrupt)
+ENTRY(uv_bau_message_intr1)
+ apicinterrupt 220,uv_bau_message_interrupt
+END(uv_bau_message_intr1)
+
ENTRY(error_interrupt)
apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
END(error_interrupt)
*/
.macro zeroentry sym
INTR_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
pushq $0 /* push error code/oldrax */
CFI_ADJUST_CFA_OFFSET 8
pushq %rax /* push real oldrax to the rdi slot */
.macro errorentry sym
XCPT_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
pushq %rax
CFI_ADJUST_CFA_OFFSET 8
CFI_REL_OFFSET rax,0
jmp irq_return
paranoid_userspace\trace:
GET_THREAD_INFO(%rcx)
- movl threadinfo_flags(%rcx),%ebx
+ movl TI_flags(%rcx),%ebx
andl $_TIF_WORK_MASK,%ebx
jz paranoid_swapgs\trace
movq %rsp,%rdi /* &pt_regs */
testl %eax,%eax
jne retint_kernel
LOCKDEP_SYS_EXIT_IRQ
- movl threadinfo_flags(%rcx),%edx
+ movl TI_flags(%rcx),%edx
movl $_TIF_WORK_MASK,%edi
andl %edi,%edx
jnz retint_careful
iret run with kernel gs again, so don't set the user space flag.
B stepping K8s sometimes report an truncated RIP for IRET
exceptions returning to compat mode. Check for these here too. */
- leaq irq_return(%rip),%rbp
- cmpq %rbp,RIP(%rsp)
+ leaq irq_return(%rip),%rcx
+ cmpq %rcx,RIP(%rsp)
je error_swapgs
- movl %ebp,%ebp /* zero extend */
- cmpq %rbp,RIP(%rsp)
+ movl %ecx,%ecx /* zero extend */
+ cmpq %rcx,RIP(%rsp)
je error_swapgs
cmpq $gs_change,RIP(%rsp)
je error_swapgs
/* Reload gs selector with exception handling */
/* edi: new selector */
-ENTRY(load_gs_index)
+ENTRY(native_load_gs_index)
CFI_STARTPROC
pushf
CFI_ADJUST_CFA_OFFSET 8
CFI_ADJUST_CFA_OFFSET -8
ret
CFI_ENDPROC
-ENDPROC(load_gs_index)
+ENDPROC(native_load_gs_index)
.section __ex_table,"a"
.align 8
zeroentry do_coprocessor_segment_overrun
END(coprocessor_segment_overrun)
-ENTRY(reserved)
- zeroentry do_reserved
-END(reserved)
-
/* runs on exception stack */
ENTRY(double_fault)
XCPT_FRAME
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/numa.h>
+ #include <linux/ftrace.h>
+
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
curidt.address = (unsigned long)newidt;
load_idt(&curidt);
-};
+}
static void set_gdt(void *newgdt, __u16 limit)
curgdt.address = (unsigned long)newgdt;
load_gdt(&curgdt);
-};
+}
static void load_segments(void)
{
unsigned long page_list[PAGES_NR];
void *control_page;
+ tracer_disable();
+
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
#include <linux/string.h>
#include <linux/reboot.h>
#include <linux/numa.h>
+ #include <linux/ftrace.h>
+
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
{
pgd_t *level4p;
level4p = (pgd_t *)__va(start_pgtable);
- return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
+ return init_level4_page(image, level4p, 0, max_pfn << PAGE_SHIFT);
}
static void set_idt(void *newidt, u16 limit)
unsigned long page_list[PAGES_NR];
void *control_page;
+ tracer_disable();
+
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
-static int hlt_counter;
-
-unsigned long boot_option_idle_override = 0;
-EXPORT_SYMBOL(boot_option_idle_override);
-
DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task;
EXPORT_PER_CPU_SYMBOL(current_task);
return ((unsigned long *)tsk->thread.sp)[3];
}
-/*
- * Powermanagement idle function, if any..
- */
-void (*pm_idle)(void);
-EXPORT_SYMBOL(pm_idle);
+#ifdef CONFIG_HOTPLUG_CPU
+#include <asm/nmi.h>
-void disable_hlt(void)
+static void cpu_exit_clear(void)
{
- hlt_counter++;
-}
+ int cpu = raw_smp_processor_id();
-EXPORT_SYMBOL(disable_hlt);
+ idle_task_exit();
-void enable_hlt(void)
-{
- hlt_counter--;
-}
+ cpu_uninit();
+ irq_ctx_exit(cpu);
-EXPORT_SYMBOL(enable_hlt);
+ cpu_clear(cpu, cpu_callout_map);
+ cpu_clear(cpu, cpu_callin_map);
-/*
- * We use this if we don't have any better
- * idle routine..
- */
-void default_idle(void)
-{
- if (!hlt_counter && boot_cpu_data.hlt_works_ok) {
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we
- * test NEED_RESCHED:
- */
- smp_mb();
-
- if (!need_resched())
- safe_halt(); /* enables interrupts racelessly */
- else
- local_irq_enable();
- current_thread_info()->status |= TS_POLLING;
- } else {
- local_irq_enable();
- /* loop is done by the caller */
- cpu_relax();
- }
+ numa_remove_cpu(cpu);
}
-#ifdef CONFIG_APM_MODULE
-EXPORT_SYMBOL(default_idle);
-#endif
-#ifdef CONFIG_HOTPLUG_CPU
-#include <asm/nmi.h>
/* We don't actually take CPU down, just spin without interrupts. */
static inline void play_dead(void)
{
while (1) {
tick_nohz_stop_sched_tick();
while (!need_resched()) {
- void (*idle)(void);
check_pgt_cache();
rmb();
- idle = pm_idle;
if (rcu_pending(cpu))
rcu_check_callbacks(cpu, 0);
- if (!idle)
- idle = default_idle;
-
if (cpu_is_offline(cpu))
play_dead();
local_irq_disable();
__get_cpu_var(irq_stat).idle_timestamp = jiffies;
- idle();
+ /* Don't trace irqs off for idle */
+ stop_critical_timings();
+ pm_idle();
+ start_critical_timings();
}
tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED;
-unsigned long boot_option_idle_override = 0;
-EXPORT_SYMBOL(boot_option_idle_override);
-
-/*
- * Powermanagement idle function, if any..
- */
-void (*pm_idle)(void);
-EXPORT_SYMBOL(pm_idle);
-
static ATOMIC_NOTIFIER_HEAD(idle_notifier);
void idle_notifier_register(struct notifier_block *n)
__exit_idle();
}
-/*
- * We use this if we don't have any better
- * idle routine..
- */
-void default_idle(void)
-{
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we
- * test NEED_RESCHED:
- */
- smp_mb();
- if (!need_resched())
- safe_halt(); /* enables interrupts racelessly */
- else
- local_irq_enable();
- current_thread_info()->status |= TS_POLLING;
-}
-
#ifdef CONFIG_HOTPLUG_CPU
DECLARE_PER_CPU(int, cpu_state);
while (1) {
tick_nohz_stop_sched_tick();
while (!need_resched()) {
- void (*idle)(void);
rmb();
- idle = pm_idle;
- if (!idle)
- idle = default_idle;
+
if (cpu_is_offline(smp_processor_id()))
play_dead();
/*
*/
local_irq_disable();
enter_idle();
- idle();
+ /* Don't trace irqs off for idle */
+ stop_critical_timings();
+ pm_idle();
+ start_critical_timings();
/* In many cases the interrupt that ended idle
has already called exit_idle. But some idle
loops can be woken up without interrupt. */
p->thread.fs = me->thread.fs;
p->thread.gs = me->thread.gs;
- asm("mov %%gs,%0" : "=m" (p->thread.gsindex));
- asm("mov %%fs,%0" : "=m" (p->thread.fsindex));
- asm("mov %%es,%0" : "=m" (p->thread.es));
- asm("mov %%ds,%0" : "=m" (p->thread.ds));
+ savesegment(gs, p->thread.gsindex);
+ savesegment(fs, p->thread.fsindex);
+ savesegment(es, p->thread.es);
+ savesegment(ds, p->thread.ds);
if (unlikely(test_tsk_thread_flag(me, TIF_IO_BITMAP))) {
p->thread.io_bitmap_ptr = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
void
start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
{
- asm volatile("movl %0, %%fs; movl %0, %%es; movl %0, %%ds" :: "r"(0));
+ loadsegment(fs, 0);
+ loadsegment(es, 0);
+ loadsegment(ds, 0);
load_gs_index(0);
regs->ip = new_ip;
regs->sp = new_sp;
*next = &next_p->thread;
int cpu = smp_processor_id();
struct tss_struct *tss = &per_cpu(init_tss, cpu);
+ unsigned fsindex, gsindex;
/* we're going to use this soon, after a few expensive things */
if (next_p->fpu_counter>5)
* Switch DS and ES.
* This won't pick up thread selector changes, but I guess that is ok.
*/
- asm volatile("mov %%es,%0" : "=m" (prev->es));
+ savesegment(es, prev->es);
if (unlikely(next->es | prev->es))
loadsegment(es, next->es);
-
- asm volatile ("mov %%ds,%0" : "=m" (prev->ds));
+
+ savesegment(ds, prev->ds);
if (unlikely(next->ds | prev->ds))
loadsegment(ds, next->ds);
+
+ /* We must save %fs and %gs before load_TLS() because
+ * %fs and %gs may be cleared by load_TLS().
+ *
+ * (e.g. xen_load_tls())
+ */
+ savesegment(fs, fsindex);
+ savesegment(gs, gsindex);
+
load_TLS(next, cpu);
+ /*
+ * Leave lazy mode, flushing any hypercalls made here.
+ * This must be done before restoring TLS segments so
+ * the GDT and LDT are properly updated, and must be
+ * done before math_state_restore, so the TS bit is up
+ * to date.
+ */
+ arch_leave_lazy_cpu_mode();
+
/*
* Switch FS and GS.
*/
{
- unsigned fsindex;
- asm volatile("movl %%fs,%0" : "=r" (fsindex));
/* segment register != 0 always requires a reload.
also reload when it has changed.
when prev process used 64bit base always reload
if (next->fs)
wrmsrl(MSR_FS_BASE, next->fs);
prev->fsindex = fsindex;
- }
- {
- unsigned gsindex;
- asm volatile("movl %%gs,%0" : "=r" (gsindex));
+
if (unlikely(gsindex | next->gsindex | prev->gs)) {
load_gs_index(next->gsindex);
if (gsindex)
set_32bit_tls(task, FS_TLS, addr);
if (doit) {
load_TLS(&task->thread, cpu);
- asm volatile("movl %0,%%fs" :: "r"(FS_TLS_SEL));
+ loadsegment(fs, FS_TLS_SEL);
}
task->thread.fsindex = FS_TLS_SEL;
task->thread.fs = 0;
if (doit) {
/* set the selector to 0 to not confuse
__switch_to */
- asm volatile("movl %0,%%fs" :: "r" (0));
+ loadsegment(fs, 0);
ret = checking_wrmsrl(MSR_FS_BASE, addr);
}
}
if (task->thread.gsindex == GS_TLS_SEL)
base = read_32bit_tls(task, GS_TLS);
else if (doit) {
- asm("movl %%gs,%0" : "=r" (gsindex));
+ savesegment(gs, gsindex);
if (gsindex)
rdmsrl(MSR_KERNEL_GS_BASE, base);
else
#include <asm/topology.h>
#include <asm/vgtod.h>
- #define __vsyscall(nr) __attribute__ ((unused,__section__(".vsyscall_" #nr)))
+ #define __vsyscall(nr) \
+ __attribute__ ((unused, __section__(".vsyscall_" #nr))) notrace
#define __syscall_clobber "r11","cx","memory"
/*
doesn't violate that. We'll find out if it does. */
static void __cpuinit vsyscall_set_cpu(int cpu)
{
- unsigned long *d;
+ unsigned long d;
unsigned long node = 0;
#ifdef CONFIG_NUMA
node = cpu_to_node(cpu);
/* Store cpu number in limit so that it can be loaded quickly
in user space in vgetcpu.
12 bits for the CPU and 8 bits for the node. */
- d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
- *d = 0x0f40000000000ULL;
- *d |= cpu;
- *d |= (node & 0xf) << 12;
- *d |= (node >> 4) << 48;
+ d = 0x0f40000000000ULL;
+ d |= cpu;
+ d |= (node & 0xf) << 12;
+ d |= (node >> 4) << 48;
+ write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
}
static void __cpuinit cpu_vsyscall_init(void *arg)
All C exports should go in the respective C files. */
#include <linux/module.h>
- #include <net/checksum.h>
#include <linux/smp.h>
+ #include <net/checksum.h>
+
#include <asm/processor.h>
- #include <asm/uaccess.h>
#include <asm/pgtable.h>
+ #include <asm/uaccess.h>
#include <asm/desc.h>
+ #include <asm/ftrace.h>
+
+ #ifdef CONFIG_FTRACE
+ /* mcount is defined in assembly */
+ EXPORT_SYMBOL(mcount);
+ #endif
EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(load_gs_index);
EXPORT_SYMBOL(_proxy_pda);
-
-#ifdef CONFIG_PARAVIRT
-/* Virtualized guests may want to use it */
-EXPORT_SYMBOL_GPL(cpu_gdt_descr);
-#endif
obj-$(CONFIG_SMP) := msr-on-cpu.o
-lib-y := delay_$(BITS).o
+lib-y := delay.o
+ lib-y += thunk_$(BITS).o
-lib-y += usercopy_$(BITS).o getuser_$(BITS).o putuser_$(BITS).o
+lib-y += usercopy_$(BITS).o getuser.o putuser.o
lib-y += memcpy_$(BITS).o
ifeq ($(CONFIG_X86_32),y)
obj-$(CONFIG_HIGHMEM) += highmem_32.o
+ obj-$(CONFIG_MMIOTRACE_HOOKS) += kmmio.o
+ obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
+ mmiotrace-y := pf_in.o mmio-mod.o
+ obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
+
ifeq ($(CONFIG_X86_32),y)
obj-$(CONFIG_NUMA) += discontig_32.o
else
obj-$(CONFIG_NUMA) += numa_64.o
obj-$(CONFIG_K8_NUMA) += k8topology_64.o
-obj-$(CONFIG_ACPI_NUMA) += srat_64.o
endif
+obj-$(CONFIG_ACPI_NUMA) += srat_$(BITS).o
+
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
+ #include <linux/mmiotrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/smp.h>
#define PF_RSVD (1<<3)
#define PF_INSTR (1<<4)
+ static inline int kmmio_fault(struct pt_regs *regs, unsigned long addr)
+ {
+ #ifdef CONFIG_MMIOTRACE_HOOKS
+ if (unlikely(is_kmmio_active()))
+ if (kmmio_handler(regs, addr) == 1)
+ return -1;
+ #endif
+ return 0;
+ }
+
static inline int notify_page_fault(struct pt_regs *regs)
{
#ifdef CONFIG_KPROBES
int ret = 0;
/* kprobe_running() needs smp_processor_id() */
-#ifdef CONFIG_X86_32
if (!user_mode_vm(regs)) {
-#else
- if (!user_mode(regs)) {
-#endif
preempt_disable();
if (kprobe_running() && kprobe_fault_handler(regs, 14))
ret = 1;
printk(KERN_CONT "NULL pointer dereference");
else
printk(KERN_CONT "paging request");
-#ifdef CONFIG_X86_32
- printk(KERN_CONT " at %08lx\n", address);
-#else
- printk(KERN_CONT " at %016lx\n", address);
-#endif
+ printk(KERN_CONT " at %p\n", (void *) address);
printk(KERN_ALERT "IP:");
printk_address(regs->ip, 1);
dump_pagetable(address);
if (notify_page_fault(regs))
return;
+ if (unlikely(kmmio_fault(regs, address)))
+ return;
/*
* We fault-in kernel-space virtual memory on-demand. The
if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
printk_ratelimit()) {
printk(
-#ifdef CONFIG_X86_32
- "%s%s[%d]: segfault at %lx ip %08lx sp %08lx error %lx",
-#else
- "%s%s[%d]: segfault at %lx ip %lx sp %lx error %lx",
-#endif
+ "%s%s[%d]: segfault at %lx ip %p sp %p error %lx",
task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
- tsk->comm, task_pid_nr(tsk), address, regs->ip,
- regs->sp, error_code);
+ tsk->comm, task_pid_nr(tsk), address,
+ (void *) regs->ip, (void *) regs->sp, error_code);
print_vma_addr(" in ", regs->ip);
printk("\n");
}
void vmalloc_sync_all(void)
{
#ifdef CONFIG_X86_32
- /*
- * Note that races in the updates of insync and start aren't
- * problematic: insync can only get set bits added, and updates to
- * start are only improving performance (without affecting correctness
- * if undone).
- */
- static DECLARE_BITMAP(insync, PTRS_PER_PGD);
- static unsigned long start = TASK_SIZE;
+ unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
if (SHARED_KERNEL_PMD)
BUILD_BUG_ON(TASK_SIZE & ~PGDIR_MASK);
for (address = start; address >= TASK_SIZE; address += PGDIR_SIZE) {
- if (!test_bit(pgd_index(address), insync)) {
- unsigned long flags;
- struct page *page;
-
- spin_lock_irqsave(&pgd_lock, flags);
- list_for_each_entry(page, &pgd_list, lru) {
- if (!vmalloc_sync_one(page_address(page),
- address))
- break;
- }
- spin_unlock_irqrestore(&pgd_lock, flags);
- if (!page)
- set_bit(pgd_index(address), insync);
+ unsigned long flags;
+ struct page *page;
+
+ spin_lock_irqsave(&pgd_lock, flags);
+ list_for_each_entry(page, &pgd_list, lru) {
+ if (!vmalloc_sync_one(page_address(page),
+ address))
+ break;
}
- if (address == start && test_bit(pgd_index(address), insync))
- start = address + PGDIR_SIZE;
+ spin_unlock_irqrestore(&pgd_lock, flags);
}
#else /* CONFIG_X86_64 */
- /*
- * Note that races in the updates of insync and start aren't
- * problematic: insync can only get set bits added, and updates to
- * start are only improving performance (without affecting correctness
- * if undone).
- */
- static DECLARE_BITMAP(insync, PTRS_PER_PGD);
- static unsigned long start = VMALLOC_START & PGDIR_MASK;
+ unsigned long start = VMALLOC_START & PGDIR_MASK;
unsigned long address;
for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
- if (!test_bit(pgd_index(address), insync)) {
- const pgd_t *pgd_ref = pgd_offset_k(address);
- unsigned long flags;
- struct page *page;
-
- if (pgd_none(*pgd_ref))
- continue;
- spin_lock_irqsave(&pgd_lock, flags);
- list_for_each_entry(page, &pgd_list, lru) {
- pgd_t *pgd;
- pgd = (pgd_t *)page_address(page) + pgd_index(address);
- if (pgd_none(*pgd))
- set_pgd(pgd, *pgd_ref);
- else
- BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
- }
- spin_unlock_irqrestore(&pgd_lock, flags);
- set_bit(pgd_index(address), insync);
+ const pgd_t *pgd_ref = pgd_offset_k(address);
+ unsigned long flags;
+ struct page *page;
+
+ if (pgd_none(*pgd_ref))
+ continue;
+ spin_lock_irqsave(&pgd_lock, flags);
+ list_for_each_entry(page, &pgd_list, lru) {
+ pgd_t *pgd;
+ pgd = (pgd_t *)page_address(page) + pgd_index(address);
+ if (pgd_none(*pgd))
+ set_pgd(pgd, *pgd_ref);
+ else
+ BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
}
- if (address == start)
- start = address + PGDIR_SIZE;
+ spin_unlock_irqrestore(&pgd_lock, flags);
}
#endif
}
unsigned int __VMALLOC_RESERVE = 128 << 20;
+unsigned long max_low_pfn_mapped;
unsigned long max_pfn_mapped;
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
static noinline int do_test_wp_bit(void);
+
+static unsigned long __initdata table_start;
+static unsigned long __meminitdata table_end;
+static unsigned long __meminitdata table_top;
+
+static int __initdata after_init_bootmem;
+
+static __init void *alloc_low_page(unsigned long *phys)
+{
+ unsigned long pfn = table_end++;
+ void *adr;
+
+ if (pfn >= table_top)
+ panic("alloc_low_page: ran out of memory");
+
+ adr = __va(pfn * PAGE_SIZE);
+ memset(adr, 0, PAGE_SIZE);
+ *phys = pfn * PAGE_SIZE;
+ return adr;
+}
+
/*
* Creates a middle page table and puts a pointer to it in the
* given global directory entry. This only returns the gd entry
pmd_t *pmd_table;
#ifdef CONFIG_X86_PAE
+ unsigned long phys;
if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
- pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
-
+ if (after_init_bootmem)
+ pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ pmd_table = (pmd_t *)alloc_low_page(&phys);
paravirt_alloc_pmd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
pte_t *page_table = NULL;
+ if (after_init_bootmem) {
#ifdef CONFIG_DEBUG_PAGEALLOC
- page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
+ page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
#endif
- if (!page_table) {
- page_table =
+ if (!page_table)
+ page_table =
(pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+ } else {
+ unsigned long phys;
+ page_table = (pte_t *)alloc_low_page(&phys);
}
paravirt_alloc_pte(&init_mm, __pa(page_table) >> PAGE_SHIFT);
* of max_low_pfn pages, by creating page tables starting from address
* PAGE_OFFSET:
*/
-static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
+static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
+ unsigned long start_pfn,
+ unsigned long end_pfn,
+ int use_pse)
{
int pgd_idx, pmd_idx, pte_ofs;
unsigned long pfn;
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
+ unsigned pages_2m = 0, pages_4k = 0;
- pgd_idx = pgd_index(PAGE_OFFSET);
- pgd = pgd_base + pgd_idx;
- pfn = 0;
+ if (!cpu_has_pse)
+ use_pse = 0;
+ pfn = start_pfn;
+ pgd_idx = pgd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pgd = pgd_base + pgd_idx;
for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) {
pmd = one_md_table_init(pgd);
- if (pfn >= max_low_pfn)
- continue;
- for (pmd_idx = 0;
- pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn;
+ if (pfn >= end_pfn)
+ continue;
+#ifdef CONFIG_X86_PAE
+ pmd_idx = pmd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pmd += pmd_idx;
+#else
+ pmd_idx = 0;
+#endif
+ for (; pmd_idx < PTRS_PER_PMD && pfn < end_pfn;
pmd++, pmd_idx++) {
unsigned int addr = pfn * PAGE_SIZE + PAGE_OFFSET;
/*
* Map with big pages if possible, otherwise
* create normal page tables:
- *
- * Don't use a large page for the first 2/4MB of memory
- * because there are often fixed size MTRRs in there
- * and overlapping MTRRs into large pages can cause
- * slowdowns.
*/
- if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0)) {
+ if (use_pse) {
unsigned int addr2;
pgprot_t prot = PAGE_KERNEL_LARGE;
is_kernel_text(addr2))
prot = PAGE_KERNEL_LARGE_EXEC;
+ pages_2m++;
set_pmd(pmd, pfn_pmd(pfn, prot));
pfn += PTRS_PER_PTE;
- max_pfn_mapped = pfn;
continue;
}
pte = one_page_table_init(pmd);
- for (pte_ofs = 0;
- pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
+ pte_ofs = pte_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pte += pte_ofs;
+ for (; pte_ofs < PTRS_PER_PTE && pfn < end_pfn;
pte++, pfn++, pte_ofs++, addr += PAGE_SIZE) {
pgprot_t prot = PAGE_KERNEL;
if (is_kernel_text(addr))
prot = PAGE_KERNEL_EXEC;
+ pages_4k++;
set_pte(pte, pfn_pte(pfn, prot));
}
- max_pfn_mapped = pfn;
}
}
-}
-
-static inline int page_kills_ppro(unsigned long pagenr)
-{
- if (pagenr >= 0x70000 && pagenr <= 0x7003F)
- return 1;
- return 0;
+ update_page_count(PG_LEVEL_2M, pages_2m);
+ update_page_count(PG_LEVEL_4K, pages_4k);
}
/*
pkmap_page_table = pte;
}
-void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+static void __init add_one_highpage_init(struct page *page, int pfn)
{
- if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
- } else
- SetPageReserved(page);
+ ClearPageReserved(page);
+ init_page_count(page);
+ __free_page(page);
+ totalhigh_pages++;
}
-#ifndef CONFIG_NUMA
-static void __init set_highmem_pages_init(int bad_ppro)
+struct add_highpages_data {
+ unsigned long start_pfn;
+ unsigned long end_pfn;
+};
+
+static int __init add_highpages_work_fn(unsigned long start_pfn,
+ unsigned long end_pfn, void *datax)
{
- int pfn;
+ int node_pfn;
+ struct page *page;
+ unsigned long final_start_pfn, final_end_pfn;
+ struct add_highpages_data *data;
- for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
- /*
- * Holes under sparsemem might not have no mem_map[]:
- */
- if (pfn_valid(pfn))
- add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
+ data = (struct add_highpages_data *)datax;
+
+ final_start_pfn = max(start_pfn, data->start_pfn);
+ final_end_pfn = min(end_pfn, data->end_pfn);
+ if (final_start_pfn >= final_end_pfn)
+ return 0;
+
+ for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;
+ node_pfn++) {
+ if (!pfn_valid(node_pfn))
+ continue;
+ page = pfn_to_page(node_pfn);
+ add_one_highpage_init(page, node_pfn);
}
+
+ return 0;
+
+}
+
+void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn)
+{
+ struct add_highpages_data data;
+
+ data.start_pfn = start_pfn;
+ data.end_pfn = end_pfn;
+
+ work_with_active_regions(nid, add_highpages_work_fn, &data);
+}
+
+#ifndef CONFIG_NUMA
+static void __init set_highmem_pages_init(void)
+{
+ add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
+
totalram_pages += totalhigh_pages;
}
#endif /* !CONFIG_NUMA */
#else
# define kmap_init() do { } while (0)
# define permanent_kmaps_init(pgd_base) do { } while (0)
-# define set_highmem_pages_init(bad_ppro) do { } while (0)
+# define set_highmem_pages_init() do { } while (0)
#endif /* CONFIG_HIGHMEM */
-pteval_t __PAGE_KERNEL = _PAGE_KERNEL;
-EXPORT_SYMBOL(__PAGE_KERNEL);
-
-pteval_t __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
-
void __init native_pagetable_setup_start(pgd_t *base)
{
unsigned long pfn, va;
* be partially populated, and so it avoids stomping on any existing
* mappings.
*/
-static void __init pagetable_init(void)
+static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
{
- pgd_t *pgd_base = swapper_pg_dir;
unsigned long vaddr, end;
- paravirt_pagetable_setup_start(pgd_base);
-
- /* Enable PSE if available */
- if (cpu_has_pse)
- set_in_cr4(X86_CR4_PSE);
-
- /* Enable PGE if available */
- if (cpu_has_pge) {
- set_in_cr4(X86_CR4_PGE);
- __PAGE_KERNEL |= _PAGE_GLOBAL;
- __PAGE_KERNEL_EXEC |= _PAGE_GLOBAL;
- }
-
- kernel_physical_mapping_init(pgd_base);
- remap_numa_kva();
-
/*
* Fixed mappings, only the page table structure has to be
* created - mappings will be set by set_fixmap():
end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
page_table_range_init(vaddr, end, pgd_base);
early_ioremap_reset();
+}
+
+static void __init pagetable_init(void)
+{
+ pgd_t *pgd_base = swapper_pg_dir;
+
+ paravirt_pagetable_setup_start(pgd_base);
permanent_kmaps_init(pgd_base);
int nx_enabled;
-pteval_t __supported_pte_mask __read_mostly = ~_PAGE_NX;
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
#ifdef CONFIG_X86_PAE
}
#endif
+/* user-defined highmem size */
+static unsigned int highmem_pages = -1;
+
/*
- * paging_init() sets up the page tables - note that the first 8MB are
- * already mapped by head.S.
- *
- * This routines also unmaps the page at virtual kernel address 0, so
- * that we can trap those pesky NULL-reference errors in the kernel.
+ * highmem=size forces highmem to be exactly 'size' bytes.
+ * This works even on boxes that have no highmem otherwise.
+ * This also works to reduce highmem size on bigger boxes.
*/
-void __init paging_init(void)
+static int __init parse_highmem(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
+ return 0;
+}
+early_param("highmem", parse_highmem);
+
+/*
+ * Determine low and high memory ranges:
+ */
+void __init find_low_pfn_range(void)
{
+ /* it could update max_pfn */
+
+ /* max_low_pfn is 0, we already have early_res support */
+
+ max_low_pfn = max_pfn;
+ if (max_low_pfn > MAXMEM_PFN) {
+ if (highmem_pages == -1)
+ highmem_pages = max_pfn - MAXMEM_PFN;
+ if (highmem_pages + MAXMEM_PFN < max_pfn)
+ max_pfn = MAXMEM_PFN + highmem_pages;
+ if (highmem_pages + MAXMEM_PFN > max_pfn) {
+ printk(KERN_WARNING "only %luMB highmem pages "
+ "available, ignoring highmem size of %uMB.\n",
+ pages_to_mb(max_pfn - MAXMEM_PFN),
+ pages_to_mb(highmem_pages));
+ highmem_pages = 0;
+ }
+ max_low_pfn = MAXMEM_PFN;
+#ifndef CONFIG_HIGHMEM
+ /* Maximum memory usable is what is directly addressable */
+ printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+ MAXMEM>>20);
+ if (max_pfn > MAX_NONPAE_PFN)
+ printk(KERN_WARNING
+ "Use a HIGHMEM64G enabled kernel.\n");
+ else
+ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+ max_pfn = MAXMEM_PFN;
+#else /* !CONFIG_HIGHMEM */
+#ifndef CONFIG_HIGHMEM64G
+ if (max_pfn > MAX_NONPAE_PFN) {
+ max_pfn = MAX_NONPAE_PFN;
+ printk(KERN_WARNING "Warning only 4GB will be used."
+ "Use a HIGHMEM64G enabled kernel.\n");
+ }
+#endif /* !CONFIG_HIGHMEM64G */
+#endif /* !CONFIG_HIGHMEM */
+ } else {
+ if (highmem_pages == -1)
+ highmem_pages = 0;
+#ifdef CONFIG_HIGHMEM
+ if (highmem_pages >= max_pfn) {
+ printk(KERN_ERR "highmem size specified (%uMB) is "
+ "bigger than pages available (%luMB)!.\n",
+ pages_to_mb(highmem_pages),
+ pages_to_mb(max_pfn));
+ highmem_pages = 0;
+ }
+ if (highmem_pages) {
+ if (max_low_pfn - highmem_pages <
+ 64*1024*1024/PAGE_SIZE){
+ printk(KERN_ERR "highmem size %uMB results in "
+ "smaller than 64MB lowmem, ignoring it.\n"
+ , pages_to_mb(highmem_pages));
+ highmem_pages = 0;
+ }
+ max_low_pfn -= highmem_pages;
+ }
+#else
+ if (highmem_pages)
+ printk(KERN_ERR "ignoring highmem size on non-highmem"
+ " kernel!\n");
+#endif
+ }
+}
+
+#ifndef CONFIG_NEED_MULTIPLE_NODES
+void __init initmem_init(unsigned long start_pfn,
+ unsigned long end_pfn)
+{
+#ifdef CONFIG_HIGHMEM
+ highstart_pfn = highend_pfn = max_pfn;
+ if (max_pfn > max_low_pfn)
+ highstart_pfn = max_low_pfn;
+ memory_present(0, 0, highend_pfn);
+ e820_register_active_regions(0, 0, highend_pfn);
+ printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
+ pages_to_mb(highend_pfn - highstart_pfn));
+ num_physpages = highend_pfn;
+ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+#else
+ memory_present(0, 0, max_low_pfn);
+ e820_register_active_regions(0, 0, max_low_pfn);
+ num_physpages = max_low_pfn;
+ high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
+#endif
+#ifdef CONFIG_FLATMEM
+ max_mapnr = num_physpages;
+#endif
+ printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
+ pages_to_mb(max_low_pfn));
+
+ setup_bootmem_allocator();
+}
+#endif /* !CONFIG_NEED_MULTIPLE_NODES */
+
+static void __init zone_sizes_init(void)
+{
+ unsigned long max_zone_pfns[MAX_NR_ZONES];
+ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+ max_zone_pfns[ZONE_DMA] =
+ virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+ max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+#ifdef CONFIG_HIGHMEM
+ max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
+#endif
+
+ free_area_init_nodes(max_zone_pfns);
+}
+
+void __init setup_bootmem_allocator(void)
+{
+ int i;
+ unsigned long bootmap_size, bootmap;
+ /*
+ * Initialize the boot-time allocator (with low memory only):
+ */
+ bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
+ bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
+ max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
+ PAGE_SIZE);
+ if (bootmap == -1L)
+ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+ reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
+
+ /* don't touch min_low_pfn */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
+ min_low_pfn, max_low_pfn);
+ printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
+ max_pfn_mapped<<PAGE_SHIFT);
+ printk(KERN_INFO " low ram: %08lx - %08lx\n",
+ min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
+ printk(KERN_INFO " bootmap %08lx - %08lx\n",
+ bootmap, bootmap + bootmap_size);
+ for_each_online_node(i)
+ free_bootmem_with_active_regions(i, max_low_pfn);
+ early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
+
+ after_init_bootmem = 1;
+}
+
+static void __init find_early_table_space(unsigned long end)
+{
+ unsigned long puds, pmds, ptes, tables, start;
+
+ puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
+ tables = PAGE_ALIGN(puds * sizeof(pud_t));
+
+ pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
+ tables += PAGE_ALIGN(pmds * sizeof(pmd_t));
+
+ if (cpu_has_pse) {
+ unsigned long extra;
+
+ extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
+ extra += PMD_SIZE;
+ ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ } else
+ ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
+ tables += PAGE_ALIGN(ptes * sizeof(pte_t));
+
+ /* for fixmap */
+ tables += PAGE_SIZE * 2;
+
+ /*
+ * RED-PEN putting page tables only on node 0 could
+ * cause a hotspot and fill up ZONE_DMA. The page tables
+ * need roughly 0.5KB per GB.
+ */
+ start = 0x7000;
+ table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
+ tables, PAGE_SIZE);
+ if (table_start == -1UL)
+ panic("Cannot find space for the kernel page tables");
+
+ table_start >>= PAGE_SHIFT;
+ table_end = table_start;
+ table_top = table_start + (tables>>PAGE_SHIFT);
+
+ printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
+ end, table_start << PAGE_SHIFT,
+ (table_start << PAGE_SHIFT) + tables);
+}
+
+unsigned long __init_refok init_memory_mapping(unsigned long start,
+ unsigned long end)
+{
+ pgd_t *pgd_base = swapper_pg_dir;
+ unsigned long start_pfn, end_pfn;
+ unsigned long big_page_start;
+
+ /*
+ * Find space for the kernel direct mapping tables.
+ */
+ if (!after_init_bootmem)
+ find_early_table_space(end);
+
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk(KERN_INFO "NX (Execute Disable) protection: active\n");
#endif
- pagetable_init();
+
+ /* Enable PSE if available */
+ if (cpu_has_pse)
+ set_in_cr4(X86_CR4_PSE);
+
+ /* Enable PGE if available */
+ if (cpu_has_pge) {
+ set_in_cr4(X86_CR4_PGE);
+ __supported_pte_mask |= _PAGE_GLOBAL;
+ }
+
+ /*
+ * Don't use a large page for the first 2/4MB of memory
+ * because there are often fixed size MTRRs in there
+ * and overlapping MTRRs into large pages can cause
+ * slowdowns.
+ */
+ big_page_start = PMD_SIZE;
+
+ if (start < big_page_start) {
+ start_pfn = start >> PAGE_SHIFT;
+ end_pfn = min(big_page_start>>PAGE_SHIFT, end>>PAGE_SHIFT);
+ } else {
+ /* head is not big page alignment ? */
+ start_pfn = start >> PAGE_SHIFT;
+ end_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
+ << (PMD_SHIFT - PAGE_SHIFT);
+ }
+ if (start_pfn < end_pfn)
+ kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn, 0);
+
+ /* big page range */
+ start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
+ << (PMD_SHIFT - PAGE_SHIFT);
+ if (start_pfn < (big_page_start >> PAGE_SHIFT))
+ start_pfn = big_page_start >> PAGE_SHIFT;
+ end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+ if (start_pfn < end_pfn)
+ kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn,
+ cpu_has_pse);
+
+ /* tail is not big page alignment ? */
+ start_pfn = end_pfn;
+ if (start_pfn > (big_page_start>>PAGE_SHIFT)) {
+ end_pfn = end >> PAGE_SHIFT;
+ if (start_pfn < end_pfn)
+ kernel_physical_mapping_init(pgd_base, start_pfn,
+ end_pfn, 0);
+ }
+
+ early_ioremap_page_table_range_init(pgd_base);
load_cr3(swapper_pg_dir);
__flush_tlb_all();
+ if (!after_init_bootmem)
+ reserve_early(table_start << PAGE_SHIFT,
+ table_end << PAGE_SHIFT, "PGTABLE");
+
+ return end >> PAGE_SHIFT;
+}
+
+
+/*
+ * paging_init() sets up the page tables - note that the first 8MB are
+ * already mapped by head.S.
+ *
+ * This routines also unmaps the page at virtual kernel address 0, so
+ * that we can trap those pesky NULL-reference errors in the kernel.
+ */
+void __init paging_init(void)
+{
+ pagetable_init();
+
+ __flush_tlb_all();
+
kmap_init();
+
+ /*
+ * NOTE: at this point the bootmem allocator is fully available.
+ */
+ sparse_init();
+ zone_sizes_init();
+
+ paravirt_post_allocator_init();
}
/*
void __init mem_init(void)
{
int codesize, reservedpages, datasize, initsize;
- int tmp, bad_ppro;
+ int tmp;
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
-#endif
- bad_ppro = ppro_with_ram_bug();
-
-#ifdef CONFIG_HIGHMEM
- /* check that fixmap and pkmap do not overlap */
- if (PKMAP_BASE + LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
- printk(KERN_ERR
- "fixmap and kmap areas overlap - this will crash\n");
- printk(KERN_ERR "pkstart: %lxh pkend: %lxh fixstart %lxh\n",
- PKMAP_BASE, PKMAP_BASE + LAST_PKMAP*PAGE_SIZE,
- FIXADDR_START);
- BUG();
- }
#endif
/* this will put all low memory onto the freelists */
totalram_pages += free_all_bootmem();
if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
reservedpages++;
- set_highmem_pages_init(bad_ppro);
+ set_highmem_pages_init();
codesize = (unsigned long) &_etext - (unsigned long) &_text;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
(unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
);
-#if 1 /* double-sanity-check paranoia */
printk(KERN_INFO "virtual kernel memory layout:\n"
" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
#ifdef CONFIG_HIGHMEM
#endif
BUG_ON(VMALLOC_START > VMALLOC_END);
BUG_ON((unsigned long)high_memory > VMALLOC_START);
-#endif /* double-sanity-check paranoia */
if (boot_cpu_data.wp_works_ok < 0)
test_wp_bit();
unsigned long start = PFN_ALIGN(_text);
unsigned long size = PFN_ALIGN(_etext) - start;
+ #ifndef CONFIG_DYNAMIC_FTRACE
+ /* Dynamic tracing modifies the kernel text section */
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
printk(KERN_INFO "Write protecting the kernel text: %luk\n",
size >> 10);
printk(KERN_INFO "Testing CPA: write protecting again\n");
set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
#endif
+ #endif /* CONFIG_DYNAMIC_FTRACE */
+
start += size;
size = (unsigned long)__end_rodata - start;
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
free_init_pages("initrd memory", start, end);
}
#endif
+
+int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
+ int flags)
+{
+ return reserve_bootmem(phys, len, flags);
+}
#include <linux/swap.h>
#include <linux/smp.h>
#include <linux/init.h>
+#include <linux/initrd.h>
#include <linux/pagemap.h>
#include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <asm/numa.h>
#include <asm/cacheflush.h>
+/*
+ * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries.
+ * The direct mapping extends to max_pfn_mapped, so that we can directly access
+ * apertures, ACPI and other tables without having to play with fixmaps.
+ */
+unsigned long max_low_pfn_mapped;
+unsigned long max_pfn_mapped;
+
static unsigned long dma_reserve __initdata;
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
return ptr;
}
-static __init void
-set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
+void
+set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte)
{
- pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte, new_pte;
-
- pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys);
+ pte_t *pte;
- pgd = pgd_offset_k(vaddr);
- if (pgd_none(*pgd)) {
- printk(KERN_ERR
- "PGD FIXMAP MISSING, it should be setup in head.S!\n");
- return;
- }
- pud = pud_offset(pgd, vaddr);
+ pud = pud_page + pud_index(vaddr);
if (pud_none(*pud)) {
pmd = (pmd_t *) spp_getpage();
- set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+ pud_populate(&init_mm, pud, pmd);
if (pmd != pmd_offset(pud, 0)) {
printk(KERN_ERR "PAGETABLE BUG #01! %p <-> %p\n",
pmd, pmd_offset(pud, 0));
pmd = pmd_offset(pud, vaddr);
if (pmd_none(*pmd)) {
pte = (pte_t *) spp_getpage();
- set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
+ pmd_populate_kernel(&init_mm, pmd, pte);
if (pte != pte_offset_kernel(pmd, 0)) {
printk(KERN_ERR "PAGETABLE BUG #02!\n");
return;
}
}
- new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
pte = pte_offset_kernel(pmd, vaddr);
if (!pte_none(*pte) && pte_val(new_pte) &&
__flush_tlb_one(vaddr);
}
+void
+set_pte_vaddr(unsigned long vaddr, pte_t pteval)
+{
+ pgd_t *pgd;
+ pud_t *pud_page;
+
+ pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(pteval));
+
+ pgd = pgd_offset_k(vaddr);
+ if (pgd_none(*pgd)) {
+ printk(KERN_ERR
+ "PGD FIXMAP MISSING, it should be setup in head.S!\n");
+ return;
+ }
+ pud_page = (pud_t*)pgd_page_vaddr(*pgd);
+ set_pte_vaddr_pud(pud_page, vaddr, pteval);
+}
+
+/*
+ * Create large page table mappings for a range of physical addresses.
+ */
+static void __init __init_extra_mapping(unsigned long phys, unsigned long size,
+ pgprot_t prot)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+
+ BUG_ON((phys & ~PMD_MASK) || (size & ~PMD_MASK));
+ for (; size; phys += PMD_SIZE, size -= PMD_SIZE) {
+ pgd = pgd_offset_k((unsigned long)__va(phys));
+ if (pgd_none(*pgd)) {
+ pud = (pud_t *) spp_getpage();
+ set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE |
+ _PAGE_USER));
+ }
+ pud = pud_offset(pgd, (unsigned long)__va(phys));
+ if (pud_none(*pud)) {
+ pmd = (pmd_t *) spp_getpage();
+ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE |
+ _PAGE_USER));
+ }
+ pmd = pmd_offset(pud, phys);
+ BUG_ON(!pmd_none(*pmd));
+ set_pmd(pmd, __pmd(phys | pgprot_val(prot)));
+ }
+}
+
+void __init init_extra_mapping_wb(unsigned long phys, unsigned long size)
+{
+ __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE);
+}
+
+void __init init_extra_mapping_uc(unsigned long phys, unsigned long size)
+{
+ __init_extra_mapping(phys, size, PAGE_KERNEL_LARGE_NOCACHE);
+}
+
/*
* The head.S code sets up the kernel high mapping:
*
}
}
-/* NOTE: this is meant to be run only at boot */
-void __init __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
-{
- unsigned long address = __fix_to_virt(idx);
-
- if (idx >= __end_of_fixed_addresses) {
- printk(KERN_ERR "Invalid __set_fixmap\n");
- return;
- }
- set_pte_phys(address, phys, prot);
-}
-
static unsigned long __initdata table_start;
static unsigned long __meminitdata table_end;
+static unsigned long __meminitdata table_top;
static __meminit void *alloc_low_page(unsigned long *phys)
{
return adr;
}
- if (pfn >= end_pfn)
+ if (pfn >= table_top)
panic("alloc_low_page: ran out of memory");
adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
early_iounmap(adr, PAGE_SIZE);
}
-/* Must run before zap_low_mappings */
-__meminit void *early_ioremap(unsigned long addr, unsigned long size)
+static unsigned long __meminit
+phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end)
{
- pmd_t *pmd, *last_pmd;
- unsigned long vaddr;
- int i, pmds;
+ unsigned pages = 0;
+ unsigned long last_map_addr = end;
+ int i;
+
+ pte_t *pte = pte_page + pte_index(addr);
- pmds = ((addr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
- vaddr = __START_KERNEL_map;
- pmd = level2_kernel_pgt;
- last_pmd = level2_kernel_pgt + PTRS_PER_PMD - 1;
+ for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) {
- for (; pmd <= last_pmd; pmd++, vaddr += PMD_SIZE) {
- for (i = 0; i < pmds; i++) {
- if (pmd_present(pmd[i]))
- goto continue_outer_loop;
+ if (addr >= end) {
+ if (!after_bootmem) {
+ for(; i < PTRS_PER_PTE; i++, pte++)
+ set_pte(pte, __pte(0));
+ }
+ break;
}
- vaddr += addr & ~PMD_MASK;
- addr &= PMD_MASK;
- for (i = 0; i < pmds; i++, addr += PMD_SIZE)
- set_pmd(pmd+i, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
- __flush_tlb_all();
+ if (pte_val(*pte))
+ continue;
- return (void *)vaddr;
-continue_outer_loop:
- ;
+ if (0)
+ printk(" pte=%p addr=%lx pte=%016lx\n",
+ pte, addr, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL).pte);
+ set_pte(pte, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL));
+ last_map_addr = (addr & PAGE_MASK) + PAGE_SIZE;
+ pages++;
}
- printk(KERN_ERR "early_ioremap(0x%lx, %lu) failed\n", addr, size);
+ update_page_count(PG_LEVEL_4K, pages);
- return NULL;
+ return last_map_addr;
}
-/*
- * To avoid virtual aliases later:
- */
-__meminit void early_iounmap(void *addr, unsigned long size)
+static unsigned long __meminit
+phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end)
{
- unsigned long vaddr;
- pmd_t *pmd;
- int i, pmds;
-
- vaddr = (unsigned long)addr;
- pmds = ((vaddr & ~PMD_MASK) + size + ~PMD_MASK) / PMD_SIZE;
- pmd = level2_kernel_pgt + pmd_index(vaddr);
+ pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd);
- for (i = 0; i < pmds; i++)
- pmd_clear(pmd + i);
-
- __flush_tlb_all();
+ return phys_pte_init(pte, address, end);
}
static unsigned long __meminit
-phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end)
+phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
+ unsigned long page_size_mask)
{
+ unsigned long pages = 0;
+ unsigned long last_map_addr = end;
+
int i = pmd_index(address);
for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) {
+ unsigned long pte_phys;
pmd_t *pmd = pmd_page + pmd_index(address);
+ pte_t *pte;
if (address >= end) {
if (!after_bootmem) {
break;
}
- if (pmd_val(*pmd))
+ if (pmd_val(*pmd)) {
+ if (!pmd_large(*pmd))
+ last_map_addr = phys_pte_update(pmd, address,
+ end);
+ continue;
+ }
+
+ if (page_size_mask & (1<<PG_LEVEL_2M)) {
+ pages++;
+ set_pte((pte_t *)pmd,
+ pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
+ last_map_addr = (address & PMD_MASK) + PMD_SIZE;
continue;
+ }
- set_pte((pte_t *)pmd,
- pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
+ pte = alloc_low_page(&pte_phys);
+ last_map_addr = phys_pte_init(pte, address, end);
+ unmap_low_page(pte);
+
+ pmd_populate_kernel(&init_mm, pmd, __va(pte_phys));
}
- return address;
+ update_page_count(PG_LEVEL_2M, pages);
+ return last_map_addr;
}
static unsigned long __meminit
-phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)
+phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end,
+ unsigned long page_size_mask)
{
pmd_t *pmd = pmd_offset(pud, 0);
unsigned long last_map_addr;
spin_lock(&init_mm.page_table_lock);
- last_map_addr = phys_pmd_init(pmd, address, end);
+ last_map_addr = phys_pmd_init(pmd, address, end, page_size_mask);
spin_unlock(&init_mm.page_table_lock);
__flush_tlb_all();
return last_map_addr;
}
static unsigned long __meminit
-phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)
+phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
+ unsigned long page_size_mask)
{
+ unsigned long pages = 0;
unsigned long last_map_addr = end;
int i = pud_index(addr);
if (pud_val(*pud)) {
if (!pud_large(*pud))
- last_map_addr = phys_pmd_update(pud, addr, end);
+ last_map_addr = phys_pmd_update(pud, addr, end,
+ page_size_mask);
continue;
}
- if (direct_gbpages) {
+ if (page_size_mask & (1<<PG_LEVEL_1G)) {
+ pages++;
set_pte((pte_t *)pud,
pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
last_map_addr = (addr & PUD_MASK) + PUD_SIZE;
pmd = alloc_low_page(&pmd_phys);
spin_lock(&init_mm.page_table_lock);
- set_pud(pud, __pud(pmd_phys | _KERNPG_TABLE));
- last_map_addr = phys_pmd_init(pmd, addr, end);
+ last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask);
+ unmap_low_page(pmd);
+ pud_populate(&init_mm, pud, __va(pmd_phys));
spin_unlock(&init_mm.page_table_lock);
- unmap_low_page(pmd);
}
__flush_tlb_all();
+ update_page_count(PG_LEVEL_1G, pages);
- return last_map_addr >> PAGE_SHIFT;
+ return last_map_addr;
+}
+
+static unsigned long __meminit
+phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end,
+ unsigned long page_size_mask)
+{
+ pud_t *pud;
+
+ pud = (pud_t *)pgd_page_vaddr(*pgd);
+
+ return phys_pud_init(pud, addr, end, page_size_mask);
}
static void __init find_early_table_space(unsigned long end)
{
- unsigned long puds, pmds, tables, start;
+ unsigned long puds, pmds, ptes, tables, start;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = round_up(puds * sizeof(pud_t), PAGE_SIZE);
- if (!direct_gbpages) {
+ if (direct_gbpages) {
+ unsigned long extra;
+ extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
+ pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
+ } else
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
- tables += round_up(pmds * sizeof(pmd_t), PAGE_SIZE);
- }
+ tables += round_up(pmds * sizeof(pmd_t), PAGE_SIZE);
+
+ if (cpu_has_pse) {
+ unsigned long extra;
+ extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
+ ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ } else
+ ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+ tables += round_up(ptes * sizeof(pte_t), PAGE_SIZE);
/*
* RED-PEN putting page tables only on node 0 could
table_start >>= PAGE_SHIFT;
table_end = table_start;
+ table_top = table_start + (tables >> PAGE_SHIFT);
- early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
- end, table_start << PAGE_SHIFT,
- (table_start << PAGE_SHIFT) + tables);
+ printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
+ end, table_start << PAGE_SHIFT, table_top << PAGE_SHIFT);
}
static void __init init_gbpages(void)
direct_gbpages = 0;
}
-#ifdef CONFIG_MEMTEST_BOOTPARAM
+#ifdef CONFIG_MEMTEST
static void __init memtest(unsigned long start_phys, unsigned long size,
unsigned pattern)
}
-static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE;
+/* default is disabled */
+static int memtest_pattern __initdata;
static int __init parse_memtest(char *arg)
{
}
#endif
+static unsigned long __init kernel_physical_mapping_init(unsigned long start,
+ unsigned long end,
+ unsigned long page_size_mask)
+{
+
+ unsigned long next, last_map_addr = end;
+
+ start = (unsigned long)__va(start);
+ end = (unsigned long)__va(end);
+
+ for (; start < end; start = next) {
+ pgd_t *pgd = pgd_offset_k(start);
+ unsigned long pud_phys;
+ pud_t *pud;
+
+ next = start + PGDIR_SIZE;
+ if (next > end)
+ next = end;
+
+ if (pgd_val(*pgd)) {
+ last_map_addr = phys_pud_update(pgd, __pa(start),
+ __pa(end), page_size_mask);
+ continue;
+ }
+
+ if (after_bootmem)
+ pud = pud_offset(pgd, start & PGDIR_MASK);
+ else
+ pud = alloc_low_page(&pud_phys);
+
+ last_map_addr = phys_pud_init(pud, __pa(start), __pa(next),
+ page_size_mask);
+ unmap_low_page(pud);
+ pgd_populate(&init_mm, pgd_offset_k(start),
+ __va(pud_phys));
+ }
+
+ return last_map_addr;
+}
+
+struct map_range {
+ unsigned long start;
+ unsigned long end;
+ unsigned page_size_mask;
+};
+
+#define NR_RANGE_MR 5
+
+static int save_mr(struct map_range *mr, int nr_range,
+ unsigned long start_pfn, unsigned long end_pfn,
+ unsigned long page_size_mask)
+{
+
+ if (start_pfn < end_pfn) {
+ if (nr_range >= NR_RANGE_MR)
+ panic("run out of range for init_memory_mapping\n");
+ mr[nr_range].start = start_pfn<<PAGE_SHIFT;
+ mr[nr_range].end = end_pfn<<PAGE_SHIFT;
+ mr[nr_range].page_size_mask = page_size_mask;
+ nr_range++;
+ }
+
+ return nr_range;
+}
+
/*
* Setup the direct mapping of the physical memory at PAGE_OFFSET.
* This runs before bootmem is initialized and gets pages directly from
* the physical memory. To access them they are temporarily mapped.
*/
-unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned long end)
+unsigned long __init_refok init_memory_mapping(unsigned long start,
+ unsigned long end)
{
- unsigned long next, last_map_addr = end;
- unsigned long start_phys = start, end_phys = end;
+ unsigned long last_map_addr = 0;
+ unsigned long page_size_mask = 0;
+ unsigned long start_pfn, end_pfn;
+
+ struct map_range mr[NR_RANGE_MR];
+ int nr_range, i;
printk(KERN_INFO "init_memory_mapping\n");
* memory mapped. Unfortunately this is done currently before the
* nodes are discovered.
*/
- if (!after_bootmem) {
+ if (!after_bootmem)
init_gbpages();
- find_early_table_space(end);
+
+ if (direct_gbpages)
+ page_size_mask |= 1 << PG_LEVEL_1G;
+ if (cpu_has_pse)
+ page_size_mask |= 1 << PG_LEVEL_2M;
+
+ memset(mr, 0, sizeof(mr));
+ nr_range = 0;
+
+ /* head if not big page alignment ?*/
+ start_pfn = start >> PAGE_SHIFT;
+ end_pfn = ((start + (PMD_SIZE - 1)) >> PMD_SHIFT)
+ << (PMD_SHIFT - PAGE_SHIFT);
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+
+ /* big page (2M) range*/
+ start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
+ << (PMD_SHIFT - PAGE_SHIFT);
+ end_pfn = ((start + (PUD_SIZE - 1))>>PUD_SHIFT)
+ << (PUD_SHIFT - PAGE_SHIFT);
+ if (end_pfn > ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT)))
+ end_pfn = ((end>>PUD_SHIFT)<<(PUD_SHIFT - PAGE_SHIFT));
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ page_size_mask & (1<<PG_LEVEL_2M));
+
+ /* big page (1G) range */
+ start_pfn = end_pfn;
+ end_pfn = (end>>PUD_SHIFT) << (PUD_SHIFT - PAGE_SHIFT);
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ page_size_mask &
+ ((1<<PG_LEVEL_2M)|(1<<PG_LEVEL_1G)));
+
+ /* tail is not big page (1G) alignment */
+ start_pfn = end_pfn;
+ end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn,
+ page_size_mask & (1<<PG_LEVEL_2M));
+
+ /* tail is not big page (2M) alignment */
+ start_pfn = end_pfn;
+ end_pfn = end>>PAGE_SHIFT;
+ nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
+
+ /* try to merge same page size and continuous */
+ for (i = 0; nr_range > 1 && i < nr_range - 1; i++) {
+ unsigned long old_start;
+ if (mr[i].end != mr[i+1].start ||
+ mr[i].page_size_mask != mr[i+1].page_size_mask)
+ continue;
+ /* move it */
+ old_start = mr[i].start;
+ memmove(&mr[i], &mr[i+1],
+ (nr_range - 1 - i) * sizeof (struct map_range));
+ mr[i].start = old_start;
+ nr_range--;
}
- start = (unsigned long)__va(start);
- end = (unsigned long)__va(end);
+ for (i = 0; i < nr_range; i++)
+ printk(KERN_DEBUG " %010lx - %010lx page %s\n",
+ mr[i].start, mr[i].end,
+ (mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
+ (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
- for (; start < end; start = next) {
- pgd_t *pgd = pgd_offset_k(start);
- unsigned long pud_phys;
- pud_t *pud;
-
- if (after_bootmem)
- pud = pud_offset(pgd, start & PGDIR_MASK);
- else
- pud = alloc_low_page(&pud_phys);
+ if (!after_bootmem)
+ find_early_table_space(end);
- next = start + PGDIR_SIZE;
- if (next > end)
- next = end;
- last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));
- if (!after_bootmem)
- set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
- unmap_low_page(pud);
- }
+ for (i = 0; i < nr_range; i++)
+ last_map_addr = kernel_physical_mapping_init(
+ mr[i].start, mr[i].end,
+ mr[i].page_size_mask);
if (!after_bootmem)
mmu_cr4_features = read_cr4();
__flush_tlb_all();
- if (!after_bootmem)
+ if (!after_bootmem && table_end > table_start)
reserve_early(table_start << PAGE_SHIFT,
table_end << PAGE_SHIFT, "PGTABLE");
+ printk(KERN_INFO "last_map_addr: %lx end: %lx\n",
+ last_map_addr, end);
+
if (!after_bootmem)
- early_memtest(start_phys, end_phys);
+ early_memtest(start, end);
- return last_map_addr;
+ return last_map_addr >> PAGE_SHIFT;
}
#ifndef CONFIG_NUMA
+void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn)
+{
+ unsigned long bootmap_size, bootmap;
+
+ bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
+ bootmap = find_e820_area(0, end_pfn<<PAGE_SHIFT, bootmap_size,
+ PAGE_SIZE);
+ if (bootmap == -1L)
+ panic("Cannot find bootmem map of size %ld\n", bootmap_size);
+ /* don't touch min_low_pfn */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
+ 0, end_pfn);
+ e820_register_active_regions(0, start_pfn, end_pfn);
+ free_bootmem_with_active_regions(0, end_pfn);
+ early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
+ reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
+}
+
void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN;
max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN;
- max_zone_pfns[ZONE_NORMAL] = end_pfn;
+ max_zone_pfns[ZONE_NORMAL] = max_pfn;
- memory_present(0, 0, end_pfn);
+ memory_present(0, 0, max_pfn);
sparse_init();
free_area_init_nodes(max_zone_pfns);
}
#else
totalram_pages = free_all_bootmem();
#endif
- reservedpages = end_pfn - totalram_pages -
- absent_pages_in_range(0, end_pfn);
+ reservedpages = max_pfn - totalram_pages -
+ absent_pages_in_range(0, max_pfn);
after_bootmem = 1;
codesize = (unsigned long) &_etext - (unsigned long) &_text;
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
"%ldk reserved, %ldk data, %ldk init)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
- end_pfn << (PAGE_SHIFT-10),
+ max_pfn << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
void mark_rodata_ro(void)
{
unsigned long start = PFN_ALIGN(_stext), end = PFN_ALIGN(__end_rodata);
+ unsigned long rodata_start =
+ ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
+
+ #ifdef CONFIG_DYNAMIC_FTRACE
+ /* Dynamic tracing modifies the kernel text section */
+ start = rodata_start;
+ #endif
printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
(end - start) >> 10);
* The rodata section (but not the kernel text!) should also be
* not-executable.
*/
- start = ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
- set_memory_nx(start, (end - start) >> PAGE_SHIFT);
+ set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT);
rodata_test();
}
#endif
-void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
+int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
+ int flags)
{
#ifdef CONFIG_NUMA
int nid, next_nid;
+ int ret;
#endif
unsigned long pfn = phys >> PAGE_SHIFT;
- if (pfn >= end_pfn) {
+ if (pfn >= max_pfn) {
/*
* This can happen with kdump kernels when accessing
* firmware tables:
*/
if (pfn < max_pfn_mapped)
- return;
+ return -EFAULT;
- printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n",
+ printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %lu\n",
phys, len);
- return;
+ return -EFAULT;
}
/* Should check here against the e820 map to avoid double free */
nid = phys_to_nid(phys);
next_nid = phys_to_nid(phys + len - 1);
if (nid == next_nid)
- reserve_bootmem_node(NODE_DATA(nid), phys, len, BOOTMEM_DEFAULT);
+ ret = reserve_bootmem_node(NODE_DATA(nid), phys, len, flags);
else
- reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
+ ret = reserve_bootmem(phys, len, flags);
+
+ if (ret != 0)
+ return ret;
+
#else
reserve_bootmem(phys, len, BOOTMEM_DEFAULT);
#endif
dma_reserve += len / PAGE_SIZE;
set_dma_reserve(dma_reserve);
}
+
+ return 0;
}
int kern_addr_valid(unsigned long addr)
pmd_t *pmd;
for (; addr < end; addr = next) {
- next = pmd_addr_end(addr, end);
+ void *p = NULL;
pgd = vmemmap_pgd_populate(addr, node);
if (!pgd)
if (!pud)
return -ENOMEM;
- pmd = pmd_offset(pud, addr);
- if (pmd_none(*pmd)) {
- pte_t entry;
- void *p;
+ if (!cpu_has_pse) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ pmd = vmemmap_pmd_populate(pud, addr, node);
+
+ if (!pmd)
+ return -ENOMEM;
+
+ p = vmemmap_pte_populate(pmd, addr, node);
- p = vmemmap_alloc_block(PMD_SIZE, node);
if (!p)
return -ENOMEM;
- entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
- PAGE_KERNEL_LARGE);
- set_pmd(pmd, __pmd(pte_val(entry)));
-
- /* check to see if we have contiguous blocks */
- if (p_end != p || node_start != node) {
- if (p_start)
- printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
- addr_start, addr_end-1, p_start, p_end-1, node_start);
- addr_start = addr;
- node_start = node;
- p_start = p;
- }
- addr_end = addr + PMD_SIZE;
- p_end = p + PMD_SIZE;
+ addr_end = addr + PAGE_SIZE;
+ p_end = p + PAGE_SIZE;
} else {
- vmemmap_verify((pte_t *)pmd, node, addr, next);
+ next = pmd_addr_end(addr, end);
+
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd)) {
+ pte_t entry;
+
+ p = vmemmap_alloc_block(PMD_SIZE, node);
+ if (!p)
+ return -ENOMEM;
+
+ entry = pfn_pte(__pa(p) >> PAGE_SHIFT,
+ PAGE_KERNEL_LARGE);
+ set_pmd(pmd, __pmd(pte_val(entry)));
+
+ /* check to see if we have contiguous blocks */
+ if (p_end != p || node_start != node) {
+ if (p_start)
+ printk(KERN_DEBUG " [%lx-%lx] PMD -> [%p-%p] on node %d\n",
+ addr_start, addr_end-1, p_start, p_end-1, node_start);
+ addr_start = addr;
+ node_start = node;
+ p_start = p;
+ }
+
+ addr_end = addr + PMD_SIZE;
+ p_end = p + PMD_SIZE;
+ } else
+ vmemmap_verify((pte_t *)pmd, node, addr, next);
}
+
}
return 0;
}
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+ #include <linux/mmiotrace.h>
#include <asm/cacheflush.h>
#include <asm/e820.h>
{
unsigned long pfn, offset, vaddr;
resource_size_t last_addr;
+ const resource_size_t unaligned_phys_addr = phys_addr;
+ const unsigned long unaligned_size = size;
struct vm_struct *area;
unsigned long new_prot_val;
pgprot_t prot;
int retval;
+ void __iomem *ret_addr;
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
/*
* Don't remap the low PCI/ISA area, it's always mapped..
*/
- if (phys_addr >= ISA_START_ADDRESS && last_addr < ISA_END_ADDRESS)
+ if (is_ISA_range(phys_addr, last_addr))
return (__force void __iomem *)phys_to_virt(phys_addr);
/*
return NULL;
}
- return (void __iomem *) (vaddr + offset);
+ ret_addr = (void __iomem *) (vaddr + offset);
+ mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr);
+
+ return ret_addr;
}
/**
{
/*
* Ideally, this should be:
- * pat_wc_enabled ? _PAGE_CACHE_UC : _PAGE_CACHE_UC_MINUS;
+ * pat_enabled ? _PAGE_CACHE_UC : _PAGE_CACHE_UC_MINUS;
*
* Till we fix all X drivers to use ioremap_wc(), we will use
* UC MINUS.
*/
void __iomem *ioremap_wc(unsigned long phys_addr, unsigned long size)
{
- if (pat_wc_enabled)
+ if (pat_enabled)
return __ioremap_caller(phys_addr, size, _PAGE_CACHE_WC,
__builtin_return_address(0));
else
}
EXPORT_SYMBOL(ioremap_cache);
+static void __iomem *ioremap_default(resource_size_t phys_addr,
+ unsigned long size)
+{
+ unsigned long flags;
+ void *ret;
+ int err;
+
+ /*
+ * - WB for WB-able memory and no other conflicting mappings
+ * - UC_MINUS for non-WB-able memory with no other conflicting mappings
+ * - Inherit from confliting mappings otherwise
+ */
+ err = reserve_memtype(phys_addr, phys_addr + size, -1, &flags);
+ if (err < 0)
+ return NULL;
+
+ ret = (void *) __ioremap_caller(phys_addr, size, flags,
+ __builtin_return_address(0));
+
+ free_memtype(phys_addr, phys_addr + size);
+ return (void __iomem *)ret;
+}
+
/**
* iounmap - Free a IO remapping
* @addr: virtual address from ioremap_*
* vm_area and by simply returning an address into the kernel mapping
* of ISA space. So handle that here.
*/
- if (addr >= phys_to_virt(ISA_START_ADDRESS) &&
- addr < phys_to_virt(ISA_END_ADDRESS))
+ if ((void __force *)addr >= phys_to_virt(ISA_START_ADDRESS) &&
+ (void __force *)addr < phys_to_virt(ISA_END_ADDRESS))
return;
addr = (volatile void __iomem *)
(PAGE_MASK & (unsigned long __force)addr);
+ mmiotrace_iounmap(addr);
+
/* Use the vm area unlocked, assuming the caller
ensures there isn't another iounmap for the same address
in parallel. Reuse of the virtual address is prevented by
cpa takes care of the direct mappings. */
read_lock(&vmlist_lock);
for (p = vmlist; p; p = p->next) {
- if (p->addr == addr)
+ if (p->addr == (void __force *)addr)
break;
}
read_unlock(&vmlist_lock);
free_memtype(p->phys_addr, p->phys_addr + get_vm_area_size(p));
/* Finally remove it */
- o = remove_vm_area((void *)addr);
+ o = remove_vm_area((void __force *)addr);
BUG_ON(p != o || o == NULL);
kfree(p);
}
if (page_is_ram(start >> PAGE_SHIFT))
return __va(phys);
- addr = (void *)ioremap(start, PAGE_SIZE);
+ addr = (void __force *)ioremap_default(start, PAGE_SIZE);
if (addr)
addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
return;
}
-#ifdef CONFIG_X86_32
-
int __initdata early_ioremap_debug;
static int __init early_ioremap_debug_setup(char *str)
early_param("early_ioremap_debug", early_ioremap_debug_setup);
static __initdata int after_paging_init;
-static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)]
- __section(.bss.page_aligned);
+static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;
static inline pmd_t * __init early_ioremap_pmd(unsigned long addr)
{
return;
}
pte = early_ioremap_pte(addr);
+
if (pgprot_val(flags))
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));
else
- pte_clear(NULL, addr, pte);
+ pte_clear(&init_mm, addr, pte);
__flush_tlb_one(addr);
}
{
WARN_ON(1);
}
-
-#endif /* CONFIG_X86_32 */
unsigned force_split : 1;
};
+#ifdef CONFIG_PROC_FS
+static unsigned long direct_pages_count[PG_LEVEL_NUM];
+
+void update_page_count(int level, unsigned long pages)
+{
+ unsigned long flags;
+
+ /* Protect against CPA */
+ spin_lock_irqsave(&pgd_lock, flags);
+ direct_pages_count[level] += pages;
+ spin_unlock_irqrestore(&pgd_lock, flags);
+}
+
+static void split_page_count(int level)
+{
+ direct_pages_count[level]--;
+ direct_pages_count[level - 1] += PTRS_PER_PTE;
+}
+
+int arch_report_meminfo(char *page)
+{
+ int n = sprintf(page, "DirectMap4k: %8lu\n"
+ "DirectMap2M: %8lu\n",
+ direct_pages_count[PG_LEVEL_4K],
+ direct_pages_count[PG_LEVEL_2M]);
+#ifdef CONFIG_X86_64
+ n += sprintf(page + n, "DirectMap1G: %8lu\n",
+ direct_pages_count[PG_LEVEL_1G]);
+#endif
+ return n;
+}
+#else
+static inline void split_page_count(int level) { }
+#endif
+
#ifdef CONFIG_X86_64
static inline unsigned long highmap_start_pfn(void)
return pte_offset_kernel(pmd, address);
}
+ EXPORT_SYMBOL_GPL(lookup_address);
/*
* Set the new pmd in all the pgds we know about:
for (i = 0; i < PTRS_PER_PTE; i++, pfn += pfninc)
set_pte(&pbase[i], pfn_pte(pfn, ref_prot));
+ if (address >= (unsigned long)__va(0) &&
+ address < (unsigned long)__va(max_low_pfn_mapped << PAGE_SHIFT))
+ split_page_count(level);
+
+#ifdef CONFIG_X86_64
+ if (address >= (unsigned long)__va(1UL<<32) &&
+ address < (unsigned long)__va(max_pfn_mapped << PAGE_SHIFT))
+ split_page_count(level);
+#endif
+
/*
* Install the new, split up pagetable. Important details here:
*
struct cpa_data alias_cpa;
int ret = 0;
- if (cpa->pfn > max_pfn_mapped)
+ if (cpa->pfn >= max_pfn_mapped)
return 0;
+#ifdef CONFIG_X86_64
+ if (cpa->pfn >= max_low_pfn_mapped && cpa->pfn < (1UL<<(32-PAGE_SHIFT)))
+ return 0;
+#endif
/*
* No need to redo, when the primary call touched the direct
* mapping already:
*/
- if (!within(cpa->vaddr, PAGE_OFFSET,
- PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))) {
+ if (!(within(cpa->vaddr, PAGE_OFFSET,
+ PAGE_OFFSET + (max_low_pfn_mapped << PAGE_SHIFT))
+#ifdef CONFIG_X86_64
+ || within(cpa->vaddr, PAGE_OFFSET + (1UL<<32),
+ PAGE_OFFSET + (max_pfn_mapped << PAGE_SHIFT))
+#endif
+ )) {
alias_cpa = *cpa;
alias_cpa.vaddr = (unsigned long) __va(cpa->pfn << PAGE_SHIFT);
int set_memory_wc(unsigned long addr, int numpages)
{
- if (!pat_wc_enabled)
+ if (!pat_enabled)
return set_memory_uc(addr, numpages);
if (reserve_memtype(addr, addr + numpages * PAGE_SIZE,
#define DISABLE_INTERRUPTS(x) cli
#ifdef CONFIG_X86_64
+#define SWAPGS swapgs
+/*
+ * Currently paravirt can't handle swapgs nicely when we
+ * don't have a stack we can rely on (such as a user space
+ * stack). So we either find a way around these or just fault
+ * and emulate if a guest tries to call swapgs directly.
+ *
+ * Either way, this is a good way to document that we don't
+ * have a reliable stack. x86_64 only.
+ */
+#define SWAPGS_UNSAFE_STACK swapgs
+
+#define PARAVIRT_ADJUST_EXCEPTION_FRAME /* */
+
#define INTERRUPT_RETURN iretq
-#define ENABLE_INTERRUPTS_SYSCALL_RET \
- movq %gs:pda_oldrsp, %rsp; \
- swapgs; \
- sysretq;
+#define USERGS_SYSRET64 \
+ swapgs; \
+ sysretq;
+#define USERGS_SYSRET32 \
+ swapgs; \
+ sysretl
+#define ENABLE_INTERRUPTS_SYSEXIT32 \
+ swapgs; \
+ sti; \
+ sysexit
+
#else
#define INTERRUPT_RETURN iret
-#define ENABLE_INTERRUPTS_SYSCALL_RET sti; sysexit
+#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
#define GET_CR0_INTO_EAX movl %cr0, %eax
#endif
#else
#ifdef CONFIG_X86_64
- #define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk
- #define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk
-/*
- * Currently paravirt can't handle swapgs nicely when we
- * don't have a stack we can rely on (such as a user space
- * stack). So we either find a way around these or just fault
- * and emulate if a guest tries to call swapgs directly.
- *
- * Either way, this is a good way to document that we don't
- * have a reliable stack. x86_64 only.
- */
-#define SWAPGS_UNSAFE_STACK swapgs
#define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
#define ARCH_LOCKDEP_SYS_EXIT_IRQ \
TRACE_IRQS_ON; \
TRACE_IRQS_OFF;
#else
- #define ARCH_TRACE_IRQS_ON \
- pushl %eax; \
- pushl %ecx; \
- pushl %edx; \
- call trace_hardirqs_on; \
- popl %edx; \
- popl %ecx; \
- popl %eax;
-
- #define ARCH_TRACE_IRQS_OFF \
- pushl %eax; \
- pushl %ecx; \
- pushl %edx; \
- call trace_hardirqs_off; \
- popl %edx; \
- popl %ecx; \
- popl %eax;
-
#define ARCH_LOCKDEP_SYS_EXIT \
pushl %eax; \
pushl %ecx; \
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
- # define TRACE_IRQS_ON ARCH_TRACE_IRQS_ON
- # define TRACE_IRQS_OFF ARCH_TRACE_IRQS_OFF
+ # define TRACE_IRQS_ON call trace_hardirqs_on_thunk;
+ # define TRACE_IRQS_OFF call trace_hardirqs_off_thunk;
#else
# define TRACE_IRQS_ON
# define TRACE_IRQS_OFF
#ifndef _LINUX_LINKAGE_H
#define _LINUX_LINKAGE_H
+#include <linux/compiler.h>
#include <asm/linkage.h>
+ #define notrace __attribute__((no_instrument_function))
+
#ifdef __cplusplus
#define CPP_ASMLINKAGE extern "C"
#else
# define asmregparm
#endif
+#define __page_aligned_data __section(.data.page_aligned) __aligned(PAGE_SIZE)
+#define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE)
+
/*
* This is used by architectures to keep arguments on the stack
* untouched by the compiler by keeping them live until the end.
extern unsigned long nr_uninterruptible(void);
extern unsigned long nr_active(void);
extern unsigned long nr_iowait(void);
-extern unsigned long weighted_cpuload(const int cpu);
struct seq_file;
struct cfs_rq;
extern void init_idle(struct task_struct *idle, int cpu);
extern void init_idle_bootup_task(struct task_struct *idle);
+ extern int runqueue_is_locked(void);
+
extern cpumask_t nohz_cpu_mask;
#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
extern int select_nohz_load_balancer(int cpu);
unsigned int balance_interval; /* initialise to 1. units in ms. */
unsigned int nr_balance_failed; /* initialise to 0 */
+ u64 last_update;
+
#ifdef CONFIG_SCHEDSTATS
/* load_balance() stats */
unsigned int lb_count[CPU_MAX_IDLE_TYPES];
#endif /* CONFIG_SMP */
-/*
- * A runqueue laden with a single nice 0 task scores a weighted_cpuload of
- * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
- * task of nice 0 or enough lower priority tasks to bring up the
- * weighted_cpuload
- */
-static inline int above_background_load(void)
-{
- unsigned long cpu;
-
- for_each_online_cpu(cpu) {
- if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE)
- return 1;
- }
- return 0;
-}
-
struct io_context; /* See blkdev.h */
#define NGROUPS_SMALL 32
#define NGROUPS_PER_BLOCK ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
void (*set_cpus_allowed)(struct task_struct *p,
const cpumask_t *newmask);
- void (*join_domain)(struct rq *rq);
- void (*leave_domain)(struct rq *rq);
+ void (*rq_online)(struct rq *rq);
+ void (*rq_offline)(struct rq *rq);
void (*switched_from) (struct rq *this_rq, struct task_struct *task,
int running);
#endif
int prio, static_prio, normal_prio;
+ unsigned int rt_priority;
const struct sched_class *sched_class;
struct sched_entity se;
struct sched_rt_entity rt;
int __user *set_child_tid; /* CLONE_CHILD_SETTID */
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
- unsigned int rt_priority;
cputime_t utime, stime, utimescaled, stimescaled;
cputime_t gtime;
cputime_t prev_utime, prev_stime;
gid_t gid,egid,sgid,fsgid;
struct group_info *group_info;
kernel_cap_t cap_effective, cap_inheritable, cap_permitted, cap_bset;
- unsigned securebits;
struct user_struct *user;
+ unsigned securebits;
#ifdef CONFIG_KEYS
+ unsigned char jit_keyring; /* default keyring to attach requested keys to */
struct key *request_key_auth; /* assumed request_key authority */
struct key *thread_keyring; /* keyring private to this thread */
- unsigned char jit_keyring; /* default keyring to attach requested keys to */
#endif
char comm[TASK_COMM_LEN]; /* executable name excluding path
- access with [gs]et_task_comm (which lock
# define MAX_LOCK_DEPTH 48UL
u64 curr_chain_key;
int lockdep_depth;
- struct held_lock held_locks[MAX_LOCK_DEPTH];
unsigned int lockdep_recursion;
+ struct held_lock held_locks[MAX_LOCK_DEPTH];
#endif
/* journalling filesystem info */
u64 acct_vm_mem1; /* accumulated virtual memory usage */
cputime_t acct_stimexpd;/* stime since last update */
#endif
-#ifdef CONFIG_NUMA
- struct mempolicy *mempolicy;
- short il_next;
-#endif
#ifdef CONFIG_CPUSETS
nodemask_t mems_allowed;
int cpuset_mems_generation;
#endif
struct list_head pi_state_list;
struct futex_pi_state *pi_state_cache;
+#endif
+#ifdef CONFIG_NUMA
+ struct mempolicy *mempolicy;
+ short il_next;
#endif
atomic_t fs_excl; /* holding fs exclusive resources */
struct rcu_head rcu;
#define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */
#define PF_SPREAD_PAGE 0x01000000 /* Spread page cache over cpuset */
#define PF_SPREAD_SLAB 0x02000000 /* Spread some slab caches over cpuset */
+#define PF_THREAD_BOUND 0x04000000 /* Thread bound to specific cpu */
#define PF_MEMPOLICY 0x10000000 /* Non-default NUMA mempolicy */
#define PF_MUTEX_TESTER 0x20000000 /* Thread belongs to the rt mutex tester */
#define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezeable */
static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
{
}
-#else
+
+#ifdef CONFIG_NO_HZ
+static inline void sched_clock_tick_stop(int cpu)
+{
+}
+
+static inline void sched_clock_tick_start(int cpu)
+{
+}
+#endif
+
+#else /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
extern void sched_clock_init(void);
extern u64 sched_clock_cpu(int cpu);
extern void sched_clock_tick(void);
extern void sched_clock_idle_sleep_event(void);
extern void sched_clock_idle_wakeup_event(u64 delta_ns);
+#ifdef CONFIG_NO_HZ
+extern void sched_clock_tick_stop(int cpu);
+extern void sched_clock_tick_start(int cpu);
#endif
+#endif /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
/*
* For kernel-internal use: high-speed (but slightly incorrect) per-cpu
extern unsigned int sysctl_sched_features;
extern unsigned int sysctl_sched_migration_cost;
extern unsigned int sysctl_sched_nr_migrate;
+extern unsigned int sysctl_sched_shares_ratelimit;
int sched_nr_latency_handler(struct ctl_table *table, int write,
struct file *file, void __user *buffer, size_t *length,
}
#endif
+ #ifdef CONFIG_TRACING
+ extern void
+ __trace_special(void *__tr, void *__data,
+ unsigned long arg1, unsigned long arg2, unsigned long arg3);
+ #else
+ static inline void
+ __trace_special(void *__tr, void *__data,
+ unsigned long arg1, unsigned long arg2, unsigned long arg3)
+ {
+ }
+ #endif
+
extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
}
#endif /* CONFIG_MM_OWNER */
+ #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
+
#endif /* __KERNEL__ */
#endif
#
obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
- exit.o itimer.o time.o softirq.o resource.o \
+ cpu.o exit.o itimer.o time.o softirq.o resource.o \
sysctl.o capability.o ptrace.o timer.o user.o \
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o extable.o params.o posix-timers.o \
hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
notifier.o ksysfs.o pm_qos_params.o sched_clock.o
+ CFLAGS_REMOVE_sched.o = -mno-spe
+
+ ifdef CONFIG_FTRACE
+ # Do not trace debug files and internal ftrace files
+ CFLAGS_REMOVE_lockdep.o = -pg
+ CFLAGS_REMOVE_lockdep_proc.o = -pg
+ CFLAGS_REMOVE_mutex-debug.o = -pg
+ CFLAGS_REMOVE_rtmutex-debug.o = -pg
+ CFLAGS_REMOVE_cgroup-debug.o = -pg
+ CFLAGS_REMOVE_sched_clock.o = -pg
+ endif
+
obj-$(CONFIG_SYSCTL_SYSCALL_CHECK) += sysctl_check.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
-obj-$(CONFIG_SMP) += cpu.o spinlock.o
+obj-$(CONFIG_SMP) += spinlock.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
obj-$(CONFIG_UID16) += uid16.o
obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
obj-$(CONFIG_MARKERS) += marker.o
obj-$(CONFIG_LATENCYTOP) += latencytop.o
+ obj-$(CONFIG_FTRACE) += trace/
+ obj-$(CONFIG_TRACING) += trace/
+obj-$(CONFIG_SMP) += sched_cpupri.o
ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
static DECLARE_MUTEX(console_sem);
static DECLARE_MUTEX(secondary_console_sem);
struct console *console_drivers;
+EXPORT_SYMBOL_GPL(console_drivers);
+
/*
* This is used for debugging the mess that is the VT code by
* keeping track if we have the console semaphore held. It's
static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
static int selected_console = -1;
static int preferred_console = -1;
+int console_set_on_cmdline;
+EXPORT_SYMBOL(console_set_on_cmdline);
/* Flag: console code may call schedule() */
static int console_may_schedule;
*s = 0;
__add_preferred_console(buf, idx, options, brl_options);
+ console_set_on_cmdline = 1;
return 1;
}
__setup("console=", console_setup);
_log_end = log_end;
con_start = log_end; /* Flush */
spin_unlock(&logbuf_lock);
+ stop_critical_timings(); /* don't trace print latency */
call_console_drivers(_con_start, _log_end);
+ start_critical_timings();
local_irq_restore(flags);
}
console_locked = 0;
#include <linux/bootmem.h>
#include <linux/debugfs.h>
#include <linux/ctype.h>
+ #include <linux/ftrace.h>
#include <asm/tlb.h>
#include <asm/irq_regs.h>
+#include "sched_cpupri.h"
+
/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
* to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
static DEFINE_PER_CPU(struct sched_entity, init_sched_entity);
/* Default task group's cfs_rq on each cpu */
static DEFINE_PER_CPU(struct cfs_rq, init_cfs_rq) ____cacheline_aligned_in_smp;
-#endif
+#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
static DEFINE_PER_CPU(struct sched_rt_entity, init_sched_rt_entity);
static DEFINE_PER_CPU(struct rt_rq, init_rt_rq) ____cacheline_aligned_in_smp;
-#endif
-#else
+#endif /* CONFIG_RT_GROUP_SCHED */
+#else /* !CONFIG_FAIR_GROUP_SCHED */
#define root_task_group init_task_group
-#endif
+#endif /* CONFIG_FAIR_GROUP_SCHED */
/* task_group_lock serializes add/remove of task groups and also changes to
* a task group's cpu shares.
#ifdef CONFIG_FAIR_GROUP_SCHED
#ifdef CONFIG_USER_SCHED
# define INIT_TASK_GROUP_LOAD (2*NICE_0_LOAD)
-#else
+#else /* !CONFIG_USER_SCHED */
# define INIT_TASK_GROUP_LOAD NICE_0_LOAD
-#endif
+#endif /* CONFIG_USER_SCHED */
/*
* A weight of 0 or 1 can cause arithmetics problems.
#else
static inline void set_task_rq(struct task_struct *p, unsigned int cpu) { }
+static inline struct task_group *task_group(struct task_struct *p)
+{
+ return NULL;
+}
#endif /* CONFIG_GROUP_SCHED */
u64 exec_clock;
u64 min_vruntime;
+ u64 pair_start;
struct rb_root tasks_timeline;
struct rb_node *rb_leftmost;
*/
struct list_head leaf_cfs_rq_list;
struct task_group *tg; /* group that "owns" this runqueue */
+
+#ifdef CONFIG_SMP
+ /*
+ * the part of load.weight contributed by tasks
+ */
+ unsigned long task_weight;
+
+ /*
+ * h_load = weight * f(tg)
+ *
+ * Where f(tg) is the recursive weight fraction assigned to
+ * this group.
+ */
+ unsigned long h_load;
+
+ /*
+ * this cpu's part of tg->shares
+ */
+ unsigned long shares;
+
+ /*
+ * load.weight at the time we set shares
+ */
+ unsigned long rq_weight;
+#endif
#endif
};
*/
cpumask_t rto_mask;
atomic_t rto_count;
+#ifdef CONFIG_SMP
+ struct cpupri cpupri;
+#endif
};
/*
int push_cpu;
/* cpu of this runqueue: */
int cpu;
+ int online;
+
+ unsigned long avg_load_per_task;
struct task_struct *migration_thread;
struct list_head migration_queue;
# define const_debug static const
#endif
+ /**
+ * runqueue_is_locked
+ *
+ * Returns true if the current cpu runqueue is locked.
+ * This interface allows printk to be called with the runqueue lock
+ * held and know whether or not it is OK to wake up the klogd.
+ */
+ int runqueue_is_locked(void)
+ {
+ int cpu = get_cpu();
+ struct rq *rq = cpu_rq(cpu);
+ int ret;
+
+ ret = spin_is_locked(&rq->lock);
+ put_cpu();
+ return ret;
+ }
+
/*
* Debugging: various feature bits
*/
*/
const_debug unsigned int sysctl_sched_nr_migrate = 32;
+/*
+ * ratelimit for updating the group shares.
+ * default: 0.5ms
+ */
+const_debug unsigned int sysctl_sched_shares_ratelimit = 500000;
+
/*
* period over which we measure -rt task cpu usage in us.
* default: 1s
return (u64)sysctl_sched_rt_runtime * NSEC_PER_USEC;
}
-unsigned long long time_sync_thresh = 100000;
-
-static DEFINE_PER_CPU(unsigned long long, time_offset);
-static DEFINE_PER_CPU(unsigned long long, prev_cpu_time);
-
-/*
- * Global lock which we take every now and then to synchronize
- * the CPUs time. This method is not warp-safe, but it's good
- * enough to synchronize slowly diverging time sources and thus
- * it's good enough for tracing:
- */
-static DEFINE_SPINLOCK(time_sync_lock);
-static unsigned long long prev_global_time;
-
-static unsigned long long __sync_cpu_clock(unsigned long long time, int cpu)
-{
- /*
- * We want this inlined, to not get tracer function calls
- * in this critical section:
- */
- spin_acquire(&time_sync_lock.dep_map, 0, 0, _THIS_IP_);
- __raw_spin_lock(&time_sync_lock.raw_lock);
-
- if (time < prev_global_time) {
- per_cpu(time_offset, cpu) += prev_global_time - time;
- time = prev_global_time;
- } else {
- prev_global_time = time;
- }
-
- __raw_spin_unlock(&time_sync_lock.raw_lock);
- spin_release(&time_sync_lock.dep_map, 1, _THIS_IP_);
-
- return time;
-}
-
-static unsigned long long __cpu_clock(int cpu)
-{
- unsigned long long now;
-
- /*
- * Only call sched_clock() if the scheduler has already been
- * initialized (some code might call cpu_clock() very early):
- */
- if (unlikely(!scheduler_running))
- return 0;
-
- now = sched_clock_cpu(cpu);
-
- return now;
-}
-
-/*
- * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
- * clock constructed from sched_clock():
- */
-unsigned long long notrace cpu_clock(int cpu)
-{
- unsigned long long prev_cpu_time, time, delta_time;
- unsigned long flags;
-
- local_irq_save(flags);
- prev_cpu_time = per_cpu(prev_cpu_time, cpu);
- time = __cpu_clock(cpu) + per_cpu(time_offset, cpu);
- delta_time = time-prev_cpu_time;
-
- if (unlikely(delta_time > time_sync_thresh)) {
- time = __sync_cpu_clock(time, cpu);
- per_cpu(prev_cpu_time, cpu) = time;
- }
- local_irq_restore(flags);
-
- return time;
-}
-EXPORT_SYMBOL_GPL(cpu_clock);
-
#ifndef prepare_arch_switch
# define prepare_arch_switch(next) do { } while (0)
#endif
if (!tsk_is_polling(rq->idle))
smp_send_reschedule(cpu);
}
-#endif
+#endif /* CONFIG_NO_HZ */
-#else
+#else /* !CONFIG_SMP */
static void __resched_task(struct task_struct *p, int tif_bit)
{
assert_spin_locked(&task_rq(p)->lock);
set_tsk_thread_flag(p, tif_bit);
}
-#endif
+#endif /* CONFIG_SMP */
#if BITS_PER_LONG == 32
# define WMULT_CONST (~0UL)
*/
#define SRR(x, y) (((x) + (1UL << ((y) - 1))) >> (y))
+/*
+ * delta *= weight / lw
+ */
static unsigned long
calc_delta_mine(unsigned long delta_exec, unsigned long weight,
struct load_weight *lw)
return (unsigned long)min(tmp, (u64)(unsigned long)LONG_MAX);
}
-static inline unsigned long
-calc_delta_fair(unsigned long delta_exec, struct load_weight *lw)
-{
- return calc_delta_mine(delta_exec, NICE_0_LOAD, lw);
-}
-
static inline void update_load_add(struct load_weight *lw, unsigned long inc)
{
lw->weight += inc;
#ifdef CONFIG_SMP
static unsigned long source_load(int cpu, int type);
static unsigned long target_load(int cpu, int type);
-static unsigned long cpu_avg_load_per_task(int cpu);
static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
-#else /* CONFIG_SMP */
+
+static unsigned long cpu_avg_load_per_task(int cpu)
+{
+ struct rq *rq = cpu_rq(cpu);
+
+ if (rq->nr_running)
+ rq->avg_load_per_task = rq->load.weight / rq->nr_running;
+
+ return rq->avg_load_per_task;
+}
#ifdef CONFIG_FAIR_GROUP_SCHED
-static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
+
+typedef void (*tg_visitor)(struct task_group *, int, struct sched_domain *);
+
+/*
+ * Iterate the full tree, calling @down when first entering a node and @up when
+ * leaving it for the final time.
+ */
+static void
+walk_tg_tree(tg_visitor down, tg_visitor up, int cpu, struct sched_domain *sd)
{
+ struct task_group *parent, *child;
+
+ rcu_read_lock();
+ parent = &root_task_group;
+down:
+ (*down)(parent, cpu, sd);
+ list_for_each_entry_rcu(child, &parent->children, siblings) {
+ parent = child;
+ goto down;
+
+up:
+ continue;
+ }
+ (*up)(parent, cpu, sd);
+
+ child = parent;
+ parent = parent->parent;
+ if (parent)
+ goto up;
+ rcu_read_unlock();
+}
+
+static void __set_se_shares(struct sched_entity *se, unsigned long shares);
+
+/*
+ * Calculate and set the cpu's group shares.
+ */
+static void
+__update_group_shares_cpu(struct task_group *tg, int cpu,
+ unsigned long sd_shares, unsigned long sd_rq_weight)
+{
+ int boost = 0;
+ unsigned long shares;
+ unsigned long rq_weight;
+
+ if (!tg->se[cpu])
+ return;
+
+ rq_weight = tg->cfs_rq[cpu]->load.weight;
+
+ /*
+ * If there are currently no tasks on the cpu pretend there is one of
+ * average load so that when a new task gets to run here it will not
+ * get delayed by group starvation.
+ */
+ if (!rq_weight) {
+ boost = 1;
+ rq_weight = NICE_0_LOAD;
+ }
+
+ if (unlikely(rq_weight > sd_rq_weight))
+ rq_weight = sd_rq_weight;
+
+ /*
+ * \Sum shares * rq_weight
+ * shares = -----------------------
+ * \Sum rq_weight
+ *
+ */
+ shares = (sd_shares * rq_weight) / (sd_rq_weight + 1);
+
+ /*
+ * record the actual number of shares, not the boosted amount.
+ */
+ tg->cfs_rq[cpu]->shares = boost ? 0 : shares;
+ tg->cfs_rq[cpu]->rq_weight = rq_weight;
+
+ if (shares < MIN_SHARES)
+ shares = MIN_SHARES;
+ else if (shares > MAX_SHARES)
+ shares = MAX_SHARES;
+
+ __set_se_shares(tg->se[cpu], shares);
+}
+
+/*
+ * Re-compute the task group their per cpu shares over the given domain.
+ * This needs to be done in a bottom-up fashion because the rq weight of a
+ * parent group depends on the shares of its child groups.
+ */
+static void
+tg_shares_up(struct task_group *tg, int cpu, struct sched_domain *sd)
+{
+ unsigned long rq_weight = 0;
+ unsigned long shares = 0;
+ int i;
+
+ for_each_cpu_mask(i, sd->span) {
+ rq_weight += tg->cfs_rq[i]->load.weight;
+ shares += tg->cfs_rq[i]->shares;
+ }
+
+ if ((!shares && rq_weight) || shares > tg->shares)
+ shares = tg->shares;
+
+ if (!sd->parent || !(sd->parent->flags & SD_LOAD_BALANCE))
+ shares = tg->shares;
+
+ if (!rq_weight)
+ rq_weight = cpus_weight(sd->span) * NICE_0_LOAD;
+
+ for_each_cpu_mask(i, sd->span) {
+ struct rq *rq = cpu_rq(i);
+ unsigned long flags;
+
+ spin_lock_irqsave(&rq->lock, flags);
+ __update_group_shares_cpu(tg, i, shares, rq_weight);
+ spin_unlock_irqrestore(&rq->lock, flags);
+ }
+}
+
+/*
+ * Compute the cpu's hierarchical load factor for each task group.
+ * This needs to be done in a top-down fashion because the load of a child
+ * group is a fraction of its parents load.
+ */
+static void
+tg_load_down(struct task_group *tg, int cpu, struct sched_domain *sd)
+{
+ unsigned long load;
+
+ if (!tg->parent) {
+ load = cpu_rq(cpu)->load.weight;
+ } else {
+ load = tg->parent->cfs_rq[cpu]->h_load;
+ load *= tg->cfs_rq[cpu]->shares;
+ load /= tg->parent->cfs_rq[cpu]->load.weight + 1;
+ }
+
+ tg->cfs_rq[cpu]->h_load = load;
+}
+
+static void
+tg_nop(struct task_group *tg, int cpu, struct sched_domain *sd)
+{
+}
+
+static void update_shares(struct sched_domain *sd)
+{
+ u64 now = cpu_clock(raw_smp_processor_id());
+ s64 elapsed = now - sd->last_update;
+
+ if (elapsed >= (s64)(u64)sysctl_sched_shares_ratelimit) {
+ sd->last_update = now;
+ walk_tg_tree(tg_nop, tg_shares_up, 0, sd);
+ }
}
+
+static void update_shares_locked(struct rq *rq, struct sched_domain *sd)
+{
+ spin_unlock(&rq->lock);
+ update_shares(sd);
+ spin_lock(&rq->lock);
+}
+
+static void update_h_load(int cpu)
+{
+ walk_tg_tree(tg_load_down, tg_nop, cpu, NULL);
+}
+
+#else
+
+static inline void update_shares(struct sched_domain *sd)
+{
+}
+
+static inline void update_shares_locked(struct rq *rq, struct sched_domain *sd)
+{
+}
+
#endif
-#endif /* CONFIG_SMP */
+#endif
+
+#ifdef CONFIG_FAIR_GROUP_SCHED
+static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
+{
+#ifdef CONFIG_SMP
+ cfs_rq->shares = shares;
+#endif
+}
+#endif
#include "sched_stats.h"
#include "sched_idletask.c"
#endif
#define sched_class_highest (&rt_sched_class)
+#define for_each_class(class) \
+ for (class = sched_class_highest; class; class = class->next)
-static inline void inc_load(struct rq *rq, const struct task_struct *p)
-{
- update_load_add(&rq->load, p->se.load.weight);
-}
-
-static inline void dec_load(struct rq *rq, const struct task_struct *p)
-{
- update_load_sub(&rq->load, p->se.load.weight);
-}
-
-static void inc_nr_running(struct task_struct *p, struct rq *rq)
+static void inc_nr_running(struct rq *rq)
{
rq->nr_running++;
- inc_load(rq, p);
}
-static void dec_nr_running(struct task_struct *p, struct rq *rq)
+static void dec_nr_running(struct rq *rq)
{
rq->nr_running--;
- dec_load(rq, p);
}
static void set_load_weight(struct task_struct *p)
p->se.load.inv_weight = prio_to_wmult[p->static_prio - MAX_RT_PRIO];
}
+static void update_avg(u64 *avg, u64 sample)
+{
+ s64 diff = sample - *avg;
+ *avg += diff >> 3;
+}
+
static void enqueue_task(struct rq *rq, struct task_struct *p, int wakeup)
{
sched_info_queued(p);
static void dequeue_task(struct rq *rq, struct task_struct *p, int sleep)
{
+ if (sleep && p->se.last_wakeup) {
+ update_avg(&p->se.avg_overlap,
+ p->se.sum_exec_runtime - p->se.last_wakeup);
+ p->se.last_wakeup = 0;
+ }
+
+ sched_info_dequeued(p);
p->sched_class->dequeue_task(rq, p, sleep);
p->se.on_rq = 0;
}
rq->nr_uninterruptible--;
enqueue_task(rq, p, wakeup);
- inc_nr_running(p, rq);
+ inc_nr_running(rq);
}
/*
rq->nr_uninterruptible++;
dequeue_task(rq, p, sleep);
- dec_nr_running(p, rq);
+ dec_nr_running(rq);
}
/**
return cpu_curr(task_cpu(p)) == p;
}
-/* Used instead of source_load when we know the type == 0 */
-unsigned long weighted_cpuload(const int cpu)
-{
- return cpu_rq(cpu)->load.weight;
-}
-
static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
{
set_task_rq(p, cpu);
#ifdef CONFIG_SMP
+/* Used instead of source_load when we know the type == 0 */
+static unsigned long weighted_cpuload(const int cpu)
+{
+ return cpu_rq(cpu)->load.weight;
+}
+
/*
* Is this task likely cache-hot:
*/
struct rq *rq = cpu_rq(cpu);
unsigned long total = weighted_cpuload(cpu);
- if (type == 0)
+ if (type == 0 || !sched_feat(LB_BIAS))
return total;
return min(rq->cpu_load[type-1], total);
struct rq *rq = cpu_rq(cpu);
unsigned long total = weighted_cpuload(cpu);
- if (type == 0)
+ if (type == 0 || !sched_feat(LB_BIAS))
return total;
return max(rq->cpu_load[type-1], total);
}
-/*
- * Return the average load per task on the cpu's run queue
- */
-static unsigned long cpu_avg_load_per_task(int cpu)
-{
- struct rq *rq = cpu_rq(cpu);
- unsigned long total = weighted_cpuload(cpu);
- unsigned long n = rq->nr_running;
-
- return n ? total / n : SCHED_LOAD_SCALE;
-}
-
/*
* find_idlest_group finds and returns the least busy CPU group within the
* domain.
sd = tmp;
}
+ if (sd)
+ update_shares(sd);
+
while (sd) {
cpumask_t span, tmpmask;
struct sched_group *group;
if (!sched_feat(SYNC_WAKEUPS))
sync = 0;
+#ifdef CONFIG_SMP
+ if (sched_feat(LB_WAKEUP_UPDATE)) {
+ struct sched_domain *sd;
+
+ this_cpu = raw_smp_processor_id();
+ cpu = task_cpu(p);
+
+ for_each_domain(this_cpu, sd) {
+ if (cpu_isset(cpu, sd->span)) {
+ update_shares(sd);
+ break;
+ }
+ }
+ }
+#endif
+
smp_wmb();
rq = task_rq_lock(p, &flags);
old_state = p->state;
}
}
}
-#endif
+#endif /* CONFIG_SCHEDSTATS */
out_activate:
#endif /* CONFIG_SMP */
success = 1;
out_running:
+ trace_mark(kernel_sched_wakeup,
+ "pid %d state %ld ## rq %p task %p rq->curr %p",
+ p->pid, p->state, rq, p, rq->curr);
check_preempt_curr(rq, p);
p->state = TASK_RUNNING;
p->sched_class->task_wake_up(rq, p);
#endif
out:
+ current->se.last_wakeup = current->se.sum_exec_runtime;
+
task_rq_unlock(rq, &flags);
return success;
* management (if any):
*/
p->sched_class->task_new(rq, p);
- inc_nr_running(p, rq);
+ inc_nr_running(rq);
}
+ trace_mark(kernel_sched_wakeup_new,
+ "pid %d state %ld ## rq %p task %p rq->curr %p",
+ p->pid, p->state, rq, p, rq->curr);
check_preempt_curr(rq, p);
#ifdef CONFIG_SMP
if (p->sched_class->task_wake_up)
notifier->ops->sched_out(notifier, next);
}
-#else
+#else /* !CONFIG_PREEMPT_NOTIFIERS */
static void fire_sched_in_preempt_notifiers(struct task_struct *curr)
{
{
}
-#endif
+#endif /* CONFIG_PREEMPT_NOTIFIERS */
/**
* prepare_task_switch - prepare to switch tasks
struct mm_struct *mm, *oldmm;
prepare_task_switch(rq, prev, next);
+ trace_mark(kernel_sched_schedule,
+ "prev_pid %d next_pid %d prev_state %ld "
+ "## rq %p prev %p next %p",
+ prev->pid, next->pid, prev->state,
+ rq, prev, next);
mm = next->mm;
oldmm = prev->active_mm;
/*
enum cpu_idle_type idle, int *all_pinned,
int *this_best_prio, struct rq_iterator *iterator)
{
- int loops = 0, pulled = 0, pinned = 0, skip_for_load;
+ int loops = 0, pulled = 0, pinned = 0;
struct task_struct *p;
long rem_load_move = max_load_move;
next:
if (!p || loops++ > sysctl_sched_nr_migrate)
goto out;
- /*
- * To help distribute high priority tasks across CPUs we don't
- * skip a task if it will be the highest priority task (i.e. smallest
- * prio value) on its new queue regardless of its load weight
- */
- skip_for_load = (p->se.load.weight >> 1) > rem_load_move +
- SCHED_LOAD_SCALE_FUZZ;
- if ((skip_for_load && p->prio >= *this_best_prio) ||
+
+ if ((p->se.load.weight >> 1) > rem_load_move ||
!can_migrate_task(p, busiest, this_cpu, sd, idle, &pinned)) {
p = iterator->next(iterator->arg);
goto next;
max_load_move - total_load_moved,
sd, idle, all_pinned, &this_best_prio);
class = class->next;
+
+ if (idle == CPU_NEWLY_IDLE && this_rq->nr_running)
+ break;
+
} while (class && max_load_move > total_load_moved);
return total_load_moved > 0;
max_load = this_load = total_load = total_pwr = 0;
busiest_load_per_task = busiest_nr_running = 0;
this_load_per_task = this_nr_running = 0;
+
if (idle == CPU_NOT_IDLE)
load_idx = sd->busy_idx;
else if (idle == CPU_NEWLY_IDLE)
int __group_imb = 0;
unsigned int balance_cpu = -1, first_idle_cpu = 0;
unsigned long sum_nr_running, sum_weighted_load;
+ unsigned long sum_avg_load_per_task;
+ unsigned long avg_load_per_task;
local_group = cpu_isset(this_cpu, group->cpumask);
/* Tally up the load of all CPUs in the group */
sum_weighted_load = sum_nr_running = avg_load = 0;
+ sum_avg_load_per_task = avg_load_per_task = 0;
+
max_cpu_load = 0;
min_cpu_load = ~0UL;
avg_load += load;
sum_nr_running += rq->nr_running;
sum_weighted_load += weighted_cpuload(i);
+
+ sum_avg_load_per_task += cpu_avg_load_per_task(i);
}
/*
avg_load = sg_div_cpu_power(group,
avg_load * SCHED_LOAD_SCALE);
- if ((max_cpu_load - min_cpu_load) > SCHED_LOAD_SCALE)
+
+ /*
+ * Consider the group unbalanced when the imbalance is larger
+ * than the average weight of two tasks.
+ *
+ * APZ: with cgroup the avg task weight can vary wildly and
+ * might not be a suitable number - should we keep a
+ * normalized nr_running number somewhere that negates
+ * the hierarchy?
+ */
+ avg_load_per_task = sg_div_cpu_power(group,
+ sum_avg_load_per_task * SCHED_LOAD_SCALE);
+
+ if ((max_cpu_load - min_cpu_load) > 2*avg_load_per_task)
__group_imb = 1;
group_capacity = group->__cpu_power / SCHED_LOAD_SCALE;
if (busiest_load_per_task > this_load_per_task)
imbn = 1;
} else
- this_load_per_task = SCHED_LOAD_SCALE;
+ this_load_per_task = cpu_avg_load_per_task(this_cpu);
- if (max_load - this_load + SCHED_LOAD_SCALE_FUZZ >=
+ if (max_load - this_load + 2*busiest_load_per_task >=
busiest_load_per_task * imbn) {
*imbalance = busiest_load_per_task;
return busiest;
schedstat_inc(sd, lb_count[idle]);
redo:
+ update_shares(sd);
group = find_busiest_group(sd, this_cpu, &imbalance, idle, &sd_idle,
cpus, balance);
if (!ld_moved && !sd_idle && sd->flags & SD_SHARE_CPUPOWER &&
!test_sd_parent(sd, SD_POWERSAVINGS_BALANCE))
- return -1;
- return ld_moved;
+ ld_moved = -1;
+
+ goto out;
out_balanced:
schedstat_inc(sd, lb_balanced[idle]);
if (!sd_idle && sd->flags & SD_SHARE_CPUPOWER &&
!test_sd_parent(sd, SD_POWERSAVINGS_BALANCE))
- return -1;
- return 0;
+ ld_moved = -1;
+ else
+ ld_moved = 0;
+out:
+ if (ld_moved)
+ update_shares(sd);
+ return ld_moved;
}
/*
schedstat_inc(sd, lb_count[CPU_NEWLY_IDLE]);
redo:
+ update_shares_locked(this_rq, sd);
group = find_busiest_group(sd, this_cpu, &imbalance, CPU_NEWLY_IDLE,
&sd_idle, cpus, NULL);
if (!group) {
} else
sd->nr_balance_failed = 0;
+ update_shares_locked(this_rq, sd);
return ld_moved;
out_balanced:
/* Earliest time when we have to do rebalance again */
unsigned long next_balance = jiffies + 60*HZ;
int update_next_balance = 0;
+ int need_serialize;
cpumask_t tmp;
for_each_domain(cpu, sd) {
if (interval > HZ*NR_CPUS/10)
interval = HZ*NR_CPUS/10;
+ need_serialize = sd->flags & SD_SERIALIZE;
- if (sd->flags & SD_SERIALIZE) {
+ if (need_serialize) {
if (!spin_trylock(&balancing))
goto out;
}
}
sd->last_balance = jiffies;
}
- if (sd->flags & SD_SERIALIZE)
+ if (need_serialize)
spin_unlock(&balancing);
out:
if (time_after(next_balance, sd->last_balance + interval)) {
#endif
}
- #if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT)
+ #if defined(CONFIG_PREEMPT) && (defined(CONFIG_DEBUG_PREEMPT) || \
+ defined(CONFIG_PREEMPT_TRACER))
+
+ static inline unsigned long get_parent_ip(unsigned long addr)
+ {
+ if (in_lock_functions(addr)) {
+ addr = CALLER_ADDR2;
+ if (in_lock_functions(addr))
+ addr = CALLER_ADDR3;
+ }
+ return addr;
+ }
void __kprobes add_preempt_count(int val)
{
+ #ifdef CONFIG_DEBUG_PREEMPT
/*
* Underflow?
*/
if (DEBUG_LOCKS_WARN_ON((preempt_count() < 0)))
return;
+ #endif
preempt_count() += val;
+ #ifdef CONFIG_DEBUG_PREEMPT
/*
* Spinlock count overflowing soon?
*/
DEBUG_LOCKS_WARN_ON((preempt_count() & PREEMPT_MASK) >=
PREEMPT_MASK - 10);
+ #endif
+ if (preempt_count() == val)
+ trace_preempt_off(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
}
EXPORT_SYMBOL(add_preempt_count);
void __kprobes sub_preempt_count(int val)
{
+ #ifdef CONFIG_DEBUG_PREEMPT
/*
* Underflow?
*/
if (DEBUG_LOCKS_WARN_ON((val < PREEMPT_MASK) &&
!(preempt_count() & PREEMPT_MASK)))
return;
+ #endif
+ if (preempt_count() == val)
+ trace_preempt_on(CALLER_ADDR0, get_parent_ip(CALLER_ADDR1));
preempt_count() -= val;
}
EXPORT_SYMBOL(sub_preempt_count);
prev->comm, prev->pid, preempt_count());
debug_show_held_locks(prev);
+ print_modules();
if (irqs_disabled())
print_irqtrace_events(prev);
struct task_struct *prev, *next;
unsigned long *switch_count;
struct rq *rq;
- int cpu;
+ int cpu, hrtick = sched_feat(HRTICK);
need_resched:
preempt_disable();
schedule_debug(prev);
- hrtick_clear(rq);
+ if (hrtick)
+ hrtick_clear(rq);
/*
* Do the rq-clock update outside the rq lock:
} else
spin_unlock_irq(&rq->lock);
- hrtick_set(rq);
+ if (hrtick)
+ hrtick_set(rq);
if (unlikely(reacquire_kernel_lock(current) < 0))
goto need_resched_nonpreemptible;
goto out_unlock;
}
on_rq = p->se.on_rq;
- if (on_rq) {
+ if (on_rq)
dequeue_task(rq, p, 0);
- dec_load(rq, p);
- }
p->static_prio = NICE_TO_PRIO(nice);
set_load_weight(p);
if (on_rq) {
enqueue_task(rq, p, 0);
- inc_load(rq, p);
/*
* If the task increased its priority or is running and
* lowered its priority, then reschedule its CPU:
return sched_setaffinity(pid, &new_mask);
}
-/*
- * Represents all cpu's present in the system
- * In systems capable of hotplug, this map could dynamically grow
- * as new cpu's are detected in the system via any platform specific
- * method, such as ACPI for e.g.
- */
-
-cpumask_t cpu_present_map __read_mostly;
-EXPORT_SYMBOL(cpu_present_map);
-
-#ifndef CONFIG_SMP
-cpumask_t cpu_online_map __read_mostly = CPU_MASK_ALL;
-EXPORT_SYMBOL(cpu_online_map);
-
-cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
-EXPORT_SYMBOL(cpu_possible_map);
-#endif
-
long sched_getaffinity(pid_t pid, cpumask_t *mask)
{
struct task_struct *p;
return retval;
}
- static const char stat_nam[] = "RSDTtZX";
+ static const char stat_nam[] = TASK_STATE_TO_CHAR_STR;
void sched_show_task(struct task_struct *p)
{
goto out;
}
+ if (unlikely((p->flags & PF_THREAD_BOUND) && p != current &&
+ !cpus_equal(p->cpus_allowed, *new_mask))) {
+ ret = -EINVAL;
+ goto out;
+ }
+
if (p->sched_class->set_cpus_allowed)
p->sched_class->set_cpus_allowed(p, new_mask);
else {
double_rq_lock(rq_src, rq_dest);
/* Already moved. */
if (task_cpu(p) != src_cpu)
- goto out;
+ goto done;
/* Affinity changed (again). */
if (!cpu_isset(dest_cpu, p->cpus_allowed))
- goto out;
+ goto fail;
on_rq = p->se.on_rq;
if (on_rq)
activate_task(rq_dest, p, 0);
check_preempt_curr(rq_dest, p);
}
+done:
ret = 1;
-out:
+fail:
double_rq_unlock(rq_src, rq_dest);
return ret;
}
}
#endif
+static void set_rq_online(struct rq *rq)
+{
+ if (!rq->online) {
+ const struct sched_class *class;
+
+ cpu_set(rq->cpu, rq->rd->online);
+ rq->online = 1;
+
+ for_each_class(class) {
+ if (class->rq_online)
+ class->rq_online(rq);
+ }
+ }
+}
+
+static void set_rq_offline(struct rq *rq)
+{
+ if (rq->online) {
+ const struct sched_class *class;
+
+ for_each_class(class) {
+ if (class->rq_offline)
+ class->rq_offline(rq);
+ }
+
+ cpu_clear(rq->cpu, rq->rd->online);
+ rq->online = 0;
+ }
+}
+
/*
* migration_call - callback that gets triggered when a CPU is added.
* Here we can start up the necessary migration thread for the new CPU.
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
BUG_ON(!cpu_isset(cpu, rq->rd->span));
- cpu_set(cpu, rq->rd->online);
+
+ set_rq_online(rq);
}
spin_unlock_irqrestore(&rq->lock, flags);
break;
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
BUG_ON(!cpu_isset(cpu, rq->rd->span));
- cpu_clear(cpu, rq->rd->online);
+ set_rq_offline(rq);
}
spin_unlock_irqrestore(&rq->lock, flags);
break;
#ifdef CONFIG_SCHED_DEBUG
+static inline const char *sd_level_to_string(enum sched_domain_level lvl)
+{
+ switch (lvl) {
+ case SD_LV_NONE:
+ return "NONE";
+ case SD_LV_SIBLING:
+ return "SIBLING";
+ case SD_LV_MC:
+ return "MC";
+ case SD_LV_CPU:
+ return "CPU";
+ case SD_LV_NODE:
+ return "NODE";
+ case SD_LV_ALLNODES:
+ return "ALLNODES";
+ case SD_LV_MAX:
+ return "MAX";
+
+ }
+ return "MAX";
+}
+
static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
cpumask_t *groupmask)
{
return -1;
}
- printk(KERN_CONT "span %s\n", str);
+ printk(KERN_CONT "span %s level %s\n",
+ str, sd_level_to_string(sd->level));
if (!cpu_isset(cpu, sd->span)) {
printk(KERN_ERR "ERROR: domain->span does not contain "
}
kfree(groupmask);
}
-#else
+#else /* !CONFIG_SCHED_DEBUG */
# define sched_domain_debug(sd, cpu) do { } while (0)
-#endif
+#endif /* CONFIG_SCHED_DEBUG */
static int sd_degenerate(struct sched_domain *sd)
{
static void rq_attach_root(struct rq *rq, struct root_domain *rd)
{
unsigned long flags;
- const struct sched_class *class;
spin_lock_irqsave(&rq->lock, flags);
if (rq->rd) {
struct root_domain *old_rd = rq->rd;
- for (class = sched_class_highest; class; class = class->next) {
- if (class->leave_domain)
- class->leave_domain(rq);
- }
+ if (cpu_isset(rq->cpu, old_rd->online))
+ set_rq_offline(rq);
cpu_clear(rq->cpu, old_rd->span);
- cpu_clear(rq->cpu, old_rd->online);
if (atomic_dec_and_test(&old_rd->refcount))
kfree(old_rd);
cpu_set(rq->cpu, rd->span);
if (cpu_isset(rq->cpu, cpu_online_map))
- cpu_set(rq->cpu, rd->online);
-
- for (class = sched_class_highest; class; class = class->next) {
- if (class->join_domain)
- class->join_domain(rq);
- }
+ set_rq_online(rq);
spin_unlock_irqrestore(&rq->lock, flags);
}
cpus_clear(rd->span);
cpus_clear(rd->online);
+
+ cpupri_init(&rd->cpupri);
}
static void init_defrootdomain(void)
min_val = INT_MAX;
- for (i = 0; i < MAX_NUMNODES; i++) {
+ for (i = 0; i < nr_node_ids; i++) {
/* Start at @node */
- n = (node + i) % MAX_NUMNODES;
+ n = (node + i) % nr_node_ids;
if (!nr_cpus_node(n))
continue;
cpus_or(*span, *span, *nodemask);
}
}
-#endif
+#endif /* CONFIG_NUMA */
int sched_smt_power_savings = 0, sched_mc_power_savings = 0;
*sg = &per_cpu(sched_group_cpus, cpu);
return cpu;
}
-#endif
+#endif /* CONFIG_SCHED_SMT */
/*
* multi-core sched-domains:
#ifdef CONFIG_SCHED_MC
static DEFINE_PER_CPU(struct sched_domain, core_domains);
static DEFINE_PER_CPU(struct sched_group, sched_group_core);
-#endif
+#endif /* CONFIG_SCHED_MC */
#if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
static int
sg = sg->next;
} while (sg != group_head);
}
-#endif
+#endif /* CONFIG_NUMA */
#ifdef CONFIG_NUMA
/* Free memory allocated for various sched_group structures */
if (!sched_group_nodes)
continue;
- for (i = 0; i < MAX_NUMNODES; i++) {
+ for (i = 0; i < nr_node_ids; i++) {
struct sched_group *oldsg, *sg = sched_group_nodes[i];
*nodemask = node_to_cpumask(i);
sched_group_nodes_bycpu[cpu] = NULL;
}
}
-#else
+#else /* !CONFIG_NUMA */
static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t *nodemask)
{
}
-#endif
+#endif /* CONFIG_NUMA */
/*
* Initialize sched groups cpu_power.
/*
* Allocate the per-node list of sched groups
*/
- sched_group_nodes = kcalloc(MAX_NUMNODES, sizeof(struct sched_group *),
+ sched_group_nodes = kcalloc(nr_node_ids, sizeof(struct sched_group *),
GFP_KERNEL);
if (!sched_group_nodes) {
printk(KERN_WARNING "Can not alloc sched group node list\n");
#endif
/* Set up physical groups */
- for (i = 0; i < MAX_NUMNODES; i++) {
+ for (i = 0; i < nr_node_ids; i++) {
SCHED_CPUMASK_VAR(nodemask, allmasks);
SCHED_CPUMASK_VAR(send_covered, allmasks);
send_covered, tmpmask);
}
- for (i = 0; i < MAX_NUMNODES; i++) {
+ for (i = 0; i < nr_node_ids; i++) {
/* Set up node groups */
struct sched_group *sg, *prev;
SCHED_CPUMASK_VAR(nodemask, allmasks);
cpus_or(*covered, *covered, *nodemask);
prev = sg;
- for (j = 0; j < MAX_NUMNODES; j++) {
+ for (j = 0; j < nr_node_ids; j++) {
SCHED_CPUMASK_VAR(notcovered, allmasks);
- int n = (i + j) % MAX_NUMNODES;
+ int n = (i + j) % nr_node_ids;
node_to_cpumask_ptr(pnodemask, n);
cpus_complement(*notcovered, *covered);
}
#ifdef CONFIG_NUMA
- for (i = 0; i < MAX_NUMNODES; i++)
+ for (i = 0; i < nr_node_ids; i++)
init_numa_sched_groups_power(sched_group_nodes[i]);
if (sd_allnodes) {
#endif
return err;
}
-#endif
+#endif /* CONFIG_SCHED_MC || CONFIG_SCHED_SMT */
/*
* Force a reinitialization of the sched domains hierarchy. The domains
static int update_sched_domains(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
+ int cpu = (int)(long)hcpu;
+
switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
+ disable_runtime(cpu_rq(cpu));
+ /* fall-through */
+ case CPU_UP_PREPARE:
+ case CPU_UP_PREPARE_FROZEN:
detach_destroy_domains(&cpu_online_map);
free_sched_domains();
return NOTIFY_OK;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
+
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
+ enable_runtime(cpu_rq(cpu));
+ /* fall-through */
+ case CPU_UP_CANCELED:
+ case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
/*
root_task_group.cfs_rq = (struct cfs_rq **)ptr;
ptr += nr_cpu_ids * sizeof(void **);
-#endif
-#endif
+#endif /* CONFIG_USER_SCHED */
+#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
init_task_group.rt_se = (struct sched_rt_entity **)ptr;
ptr += nr_cpu_ids * sizeof(void **);
root_task_group.rt_rq = (struct rt_rq **)ptr;
ptr += nr_cpu_ids * sizeof(void **);
-#endif
-#endif
+#endif /* CONFIG_USER_SCHED */
+#endif /* CONFIG_RT_GROUP_SCHED */
}
#ifdef CONFIG_SMP
#ifdef CONFIG_USER_SCHED
init_rt_bandwidth(&root_task_group.rt_bandwidth,
global_rt_period(), RUNTIME_INF);
-#endif
-#endif
+#endif /* CONFIG_USER_SCHED */
+#endif /* CONFIG_RT_GROUP_SCHED */
#ifdef CONFIG_GROUP_SCHED
list_add(&init_task_group.list, &task_groups);
INIT_LIST_HEAD(&root_task_group.children);
init_task_group.parent = &root_task_group;
list_add(&init_task_group.siblings, &root_task_group.children);
-#endif
-#endif
+#endif /* CONFIG_USER_SCHED */
+#endif /* CONFIG_GROUP_SCHED */
for_each_possible_cpu(i) {
struct rq *rq;
rq->next_balance = jiffies;
rq->push_cpu = 0;
rq->cpu = i;
+ rq->online = 0;
rq->migration_thread = NULL;
INIT_LIST_HEAD(&rq->migration_queue);
rq_attach_root(rq, &def_root_domain);
{
list_del_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list);
}
-#else
+#else /* !CONFG_FAIR_GROUP_SCHED */
static inline void free_fair_sched_group(struct task_group *tg)
{
}
static inline void unregister_fair_sched_group(struct task_group *tg, int cpu)
{
}
-#endif
+#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
static void free_rt_sched_group(struct task_group *tg)
{
list_del_rcu(&tg->rt_rq[cpu]->leaf_rt_rq_list);
}
-#else
+#else /* !CONFIG_RT_GROUP_SCHED */
static inline void free_rt_sched_group(struct task_group *tg)
{
}
static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
{
}
-#endif
+#endif /* CONFIG_RT_GROUP_SCHED */
#ifdef CONFIG_GROUP_SCHED
static void free_sched_group(struct task_group *tg)
task_rq_unlock(rq, &flags);
}
-#endif
+#endif /* CONFIG_GROUP_SCHED */
#ifdef CONFIG_FAIR_GROUP_SCHED
-static void set_se_shares(struct sched_entity *se, unsigned long shares)
+static void __set_se_shares(struct sched_entity *se, unsigned long shares)
{
struct cfs_rq *cfs_rq = se->cfs_rq;
- struct rq *rq = cfs_rq->rq;
int on_rq;
- spin_lock_irq(&rq->lock);
-
on_rq = se->on_rq;
if (on_rq)
dequeue_entity(cfs_rq, se, 0);
if (on_rq)
enqueue_entity(cfs_rq, se, 0);
+}
- spin_unlock_irq(&rq->lock);
+static void set_se_shares(struct sched_entity *se, unsigned long shares)
+{
+ struct cfs_rq *cfs_rq = se->cfs_rq;
+ struct rq *rq = cfs_rq->rq;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rq->lock, flags);
+ __set_se_shares(se, shares);
+ spin_unlock_irqrestore(&rq->lock, flags);
}
static DEFINE_MUTEX(shares_mutex);
* w/o tripping rebalance_share or load_balance_fair.
*/
tg->shares = shares;
- for_each_possible_cpu(i)
+ for_each_possible_cpu(i) {
+ /*
+ * force a rebalance
+ */
+ cfs_rq_set_shares(tg->cfs_rq[i], 0);
set_se_shares(tg->se[i], shares);
+ }
/*
* Enable load balance activity on this group, by inserting it back on
#ifdef CONFIG_CGROUP_SCHED
static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
{
- struct task_group *tgi, *parent = tg ? tg->parent : NULL;
+ struct task_group *tgi, *parent = tg->parent;
unsigned long total = 0;
if (!parent) {
}
rcu_read_unlock();
- return total + to_ratio(period, runtime) <
+ return total + to_ratio(period, runtime) <=
to_ratio(ktime_to_ns(parent->rt_bandwidth.rt_period),
parent->rt_bandwidth.rt_runtime);
}
static int sched_rt_global_constraints(void)
{
+ struct task_group *tg = &root_task_group;
+ u64 rt_runtime, rt_period;
int ret = 0;
+ rt_period = ktime_to_ns(tg->rt_bandwidth.rt_period);
+ rt_runtime = tg->rt_bandwidth.rt_runtime;
+
mutex_lock(&rt_constraints_mutex);
- if (!__rt_schedulable(NULL, 1, 0))
+ if (!__rt_schedulable(tg, rt_period, rt_runtime))
ret = -EINVAL;
mutex_unlock(&rt_constraints_mutex);
return ret;
}
-#else
+#else /* !CONFIG_RT_GROUP_SCHED */
static int sched_rt_global_constraints(void)
{
unsigned long flags;
return 0;
}
-#endif
+#endif /* CONFIG_RT_GROUP_SCHED */
int sched_rt_handler(struct ctl_table *table, int write,
struct file *filp, void __user *buffer, size_t *lenp,
return (u64) tg->shares;
}
-#endif
+#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
static int cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft,
{
return sched_group_rt_period(cgroup_tg(cgrp));
}
-#endif
+#endif /* CONFIG_RT_GROUP_SCHED */
static struct cftype cpu_files[] = {
#ifdef CONFIG_FAIR_GROUP_SCHED
#include <linux/nfs_fs.h>
#include <linux/acpi.h>
#include <linux/reboot.h>
+ #include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
.extra1 = &min_wakeup_granularity_ns,
.extra2 = &max_wakeup_granularity_ns,
},
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "sched_shares_ratelimit",
+ .data = &sysctl_sched_shares_ratelimit,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
{
.ctl_name = CTL_UNNUMBERED,
.procname = "sched_child_runs_first",
.mode = 0644,
.proc_handler = &proc_dointvec,
},
+ #ifdef CONFIG_FTRACE
+ {
+ .ctl_name = CTL_UNNUMBERED,
+ .procname = "ftrace_enabled",
+ .data = &ftrace_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &ftrace_enable_sysctl,
+ },
+ #endif
#ifdef CONFIG_KMOD
{
.ctl_name = KERN_MODPROBE,
projects / deliverable / linux.git / commitdiff
