Avi Kivity [Wed, 1 Jul 2009 15:25:44 +0000 (18:25 +0300)]
KVM: Trace apic registers using their symbolic names
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 1 Jul 2009 13:01:02 +0000 (16:01 +0300)]
KVM: Trace mmio
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 24 Jun 2009 13:37:05 +0000 (15:37 +0200)]
KVM: Ignore PCI ECS I/O enablement
Linux guests will try to enable access to the extended PCI config space
via the I/O ports 0xCF8/0xCFC on AMD Fam10h CPU. Since we (currently?)
don't use ECS, simply ignore write and read attempts.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 1 Jul 2009 09:09:41 +0000 (12:09 +0300)]
KVM: Trace irq level and source id
Signed-off-by: Avi Kivity <avi@redhat.com>
Jiri Slaby [Mon, 29 Jun 2009 16:05:10 +0000 (18:05 +0200)]
KVM: fix lock imbalance
There is a missing unlock on one fail path in ioapic_mmio_write,
fix that.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:45 +0000 (22:24 +0300)]
KVM: document lock nesting rule
Document kvm->lock nesting within kvm->slots_lock
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:32 +0000 (22:24 +0300)]
KVM: remove in_range from io devices
This changes bus accesses to use high-level kvm_io_bus_read/kvm_io_bus_write
functions. in_range now becomes unused so it is removed from device ops in
favor of read/write callbacks performing range checks internally.
This allows aliasing (mostly for in-kernel virtio), as well as better error
handling by making it possible to pass errors up to userspace.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:26 +0000 (22:24 +0300)]
KVM: convert bus to slots_lock
Use slots_lock to protect device list on the bus. slots_lock is already
taken for read everywhere, so we only need to take it for write when
registering devices. This is in preparation to removing in_range and
kvm->lock around it.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:21 +0000 (22:24 +0300)]
KVM: switch pit creation to slots_lock
switch pit creation to slots_lock. slots_lock is already taken for read
everywhere, so we only need to take it for write when creating pit.
This is in preparation to removing in_range and kvm->lock around it.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:14 +0000 (22:24 +0300)]
KVM: switch coalesced mmio changes to slots_lock
switch coalesced mmio slots_lock. slots_lock is already taken for read
everywhere, so we only need to take it for write when changing zones.
This is in preparation to removing in_range and kvm->lock around it.
[avi: fix build]
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Michael S. Tsirkin [Mon, 29 Jun 2009 19:24:07 +0000 (22:24 +0300)]
KVM: document locking for kvm_io_device_ops
slots_lock is taken everywhere when device ops are called.
Document this as we will use this to rework locking for io.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 17 Jun 2009 13:07:59 +0000 (10:07 -0300)]
KVM: use vcpu_id instead of bsp_vcpu pointer in kvm_vcpu_is_bsp
Change kvm_vcpu_is_bsp to use vcpu_id instead of bsp_vcpu pointer, which
is only initialized at the end of kvm_vm_ioctl_create_vcpu.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 18 Jun 2009 14:47:28 +0000 (11:47 -0300)]
KVM: remove old KVMTRACE support code
Return EOPNOTSUPP for KVM_TRACE_ENABLE/PAUSE/DISABLE ioctls.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 18 Jun 2009 14:47:27 +0000 (11:47 -0300)]
KVM: powerpc: convert marker probes to event trace
[avi: make it build]
[avi: fold trace-arch.h into trace.h]
CC: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Thu, 25 Jun 2009 10:36:49 +0000 (12:36 +0200)]
KVM: introduce module parameter for ignoring unknown MSRs accesses
KVM will inject a #GP into the guest if that tries to access unhandled
MSRs. This will crash many guests. Although it would be the correct
way to actually handle these MSRs, we introduce a runtime switchable
module param called "ignore_msrs" (defaults to 0). If this is Y, unknown
MSR reads will return 0, while MSR writes are simply dropped. In both cases
we print a message to dmesg to inform the user about that.
You can change the behaviour at any time by saying:
# echo 1 > /sys/modules/kvm/parameters/ignore_msrs
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 24 Jun 2009 10:44:34 +0000 (12:44 +0200)]
KVM: ignore reads from AMDs C1E enabled MSR
If the Linux kernel detects an C1E capable AMD processor (K8 RevF and
higher), it will access a certain MSR on every attempt to go to halt.
Explicitly handle this read and return 0 to let KVM run a Linux guest
with the native AMD host CPU propagated to the guest.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 24 Jun 2009 10:44:33 +0000 (12:44 +0200)]
KVM: ignore AMDs HWCR register access to set the FFDIS bit
Linux tries to disable the flush filter on all AMD K8 CPUs. Since KVM
does not handle the needed MSR, the injected #GP will panic the Linux
kernel. Ignore setting of the HWCR.FFDIS bit in this MSR to let Linux
boot with an AMD K8 family guest CPU.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Tue, 23 Jun 2009 18:05:14 +0000 (15:05 -0300)]
KVM: x86: missing locking in PIT/IRQCHIP/SET_BSP_CPU ioctl paths
Correct missing locking in a few places in x86's vm_ioctl handling path.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Joerg Roedel [Fri, 19 Jun 2009 13:16:23 +0000 (15:16 +0200)]
KVM: Prepare memslot data structures for multiple hugepage sizes
[avi: fix build on non-x86]
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Joerg Roedel [Fri, 19 Jun 2009 13:16:22 +0000 (15:16 +0200)]
hugetlbfs: export vma_kernel_pagsize to modules
This function is required by KVM.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Christian Borntraeger [Tue, 23 Jun 2009 15:24:06 +0000 (17:24 +0200)]
KVM: s390: Fix memslot initialization for userspace_addr != 0
Since
commit
854b5338196b1175706e99d63be43a4f8d8ab607
Author: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
KVM: s390: streamline memslot handling
s390 uses the values of the memslot instead of doing everything in the arch
ioctl handler of the KVM_SET_USER_MEMORY_REGION. Unfortunately we missed to
set the userspace_addr of our memslot due to our s390 ifdef in
__kvm_set_memory_region.
Old s390 userspace launchers did not notice, since they started the guest at
userspace address 0.
Because of CONFIG_DEFAULT_MMAP_MIN_ADDR we now put the guest at 1M userspace,
which does not work. This patch makes sure that new.userspace_addr is set
on s390.
This fix should go in quickly. Nevertheless, looking at the code we should
clean up that ifdef in the long term. Any kernel janitors?
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Thu, 18 Jun 2009 10:56:02 +0000 (12:56 +0200)]
KVM: x86 emulator: Add sysexit emulation
Handle #UD intercept of the sysexit instruction in 64bit mode returning to
32bit compat mode on an AMD host.
Setup the segment descriptors for CS and SS and the EIP/ESP registers
according to the manual.
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Thu, 18 Jun 2009 10:56:01 +0000 (12:56 +0200)]
KVM: x86 emulator: Add sysenter emulation
Handle #UD intercept of the sysenter instruction in 32bit compat mode on
an AMD host.
Setup the segment descriptors for CS and SS and the EIP/ESP registers
according to the manual.
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Thu, 18 Jun 2009 10:56:00 +0000 (12:56 +0200)]
KVM: x86 emulator: add syscall emulation
Handle #UD intercept of the syscall instruction in 32bit compat mode on
an Intel host.
Setup the segment descriptors for CS and SS and the EIP/ESP registers
according to the manual. Save the RIP and EFLAGS to the correct registers.
[avi: fix build on i386 due to missing R11]
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 17 Jun 2009 13:50:33 +0000 (15:50 +0200)]
KVM: x86 emulator: Prepare for emulation of syscall instructions
Add the flags needed for syscall, sysenter and sysexit to the opcode table.
Catch (but for now ignore) the opcodes in the emulation switch/case.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 17 Jun 2009 13:50:32 +0000 (15:50 +0200)]
KVM: x86 emulator: Add missing EFLAGS bit definitions
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Wed, 17 Jun 2009 13:50:31 +0000 (15:50 +0200)]
KVM: Allow emulation of syscalls instructions on #UD
Add the opcodes for syscall, sysenter and sysexit to the list of instructions
handled by the undefined opcode handler.
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 17 Jun 2009 12:22:14 +0000 (09:22 -0300)]
KVM: convert custom marker based tracing to event traces
This allows use of the powerful ftrace infrastructure.
See Documentation/trace/ for usage information.
[avi, stephen: various build fixes]
[sheng: fix control register breakage]
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Mon, 15 Jun 2009 13:21:25 +0000 (15:21 +0200)]
KVM: SVM: Improve nested interrupt injection
While trying to get Hyper-V running, I realized that the interrupt injection
mechanisms that are in place right now are not 100% correct.
This patch makes nested SVM's interrupt injection behave more like on a
real machine.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Mon, 15 Jun 2009 13:21:24 +0000 (15:21 +0200)]
KVM: SVM: Implement INVLPGA
SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!
For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change one day though.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Mon, 15 Jun 2009 13:21:23 +0000 (15:21 +0200)]
KVM: Implement MSRs used by Hyper-V
Hyper-V uses some MSRs, some of which are actually reserved for BIOS usage.
But let's be nice today and have it its way, because otherwise it fails
terribly.
[jaswinder: fix build for linux-next changes]
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Alexander Graf [Mon, 15 Jun 2009 13:21:22 +0000 (15:21 +0200)]
x86: Add definition for IGNNE MSR
Hyper-V accesses MSR_IGNNE while running under KVM.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Tue, 16 Jun 2009 09:36:33 +0000 (12:36 +0300)]
KVM: SVM: Don't save/restore host cr2
The host never reads cr2 in process context, so are free to clobber it. The
vmx code does this, so we can safely remove the save/restore code.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Tue, 16 Jun 2009 09:33:56 +0000 (12:33 +0300)]
KVM: VMX: Only reload guest cr2 if different from host cr2
cr2 changes only rarely, and writing it is expensive. Avoid the costly cr2
writes by checking if it does not already hold the desired value.
Shaves 70 cycles off the vmexit latency.
Signed-off-by: Avi Kivity <avi@redhat.com>
Jan Kiszka [Tue, 9 Jun 2009 13:37:03 +0000 (15:37 +0200)]
KVM: Drop useless atomic test from timer function
The current code tries to optimize the setting of
KVM_REQ_PENDING_TIMER but used atomic_inc_and_test - which always
returns true unless pending had the invalid value of -1 on entry. This
patch drops the test part preserving the original semantic but
expressing it less confusingly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jan Kiszka [Tue, 9 Jun 2009 13:37:01 +0000 (15:37 +0200)]
KVM: Fix racy event propagation in timer
Minor issue that likely had no practical relevance: the kvm timer
function so far incremented the pending counter and then may reset it
again to 1 in case reinjection was disabled. This opened a small racy
window with the corresponding VCPU loop that may have happened to run
on another (real) CPU and already consumed the value.
Fix it by skipping the incrementation in case pending is already > 0.
This opens a different race windows, but may only rarely cause lost
events in case we do not care about them anyway (!reinject).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Thu, 11 Jun 2009 08:06:51 +0000 (11:06 +0300)]
KVM: Optimize searching for highest IRR
Most of the time IRR is empty, so instead of scanning the whole IRR on
each VM entry keep a variable that tells us if IRR is not empty. IRR
will have to be scanned twice on each IRQ delivery, but this is much
more rare than VM entry.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Thu, 11 Jun 2009 08:26:11 +0000 (11:26 +0300)]
KVM: Replace pending exception by PF if it happens serially
Replace previous exception with a new one in a hope that instruction
re-execution will regenerate lost exception.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 11 Jun 2009 15:07:44 +0000 (12:07 -0300)]
KVM: VMX: conditionally disable 2M pages
Disable usage of 2M pages if VMX_EPT_2MB_PAGE_BIT (bit 16) is clear
in MSR_IA32_VMX_EPT_VPID_CAP and EPT is enabled.
[avi: s/largepages_disabled/largepages_enabled/ to avoid negative logic]
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 11 Jun 2009 15:07:43 +0000 (12:07 -0300)]
KVM: VMX: EPT misconfiguration handler
Handler for EPT misconfiguration which checks for valid state
in the shadow pagetables, printing the spte on each level.
The separate WARN_ONs are useful for kerneloops.org.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 11 Jun 2009 15:07:42 +0000 (12:07 -0300)]
KVM: MMU: add kvm_mmu_get_spte_hierarchy helper
Required by EPT misconfiguration handler.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 11 Jun 2009 15:07:41 +0000 (12:07 -0300)]
KVM: MMU: make for_each_shadow_entry aware of largepages
This way there is no need to add explicit checks in every
for_each_shadow_entry user.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 11 Jun 2009 15:07:40 +0000 (12:07 -0300)]
KVM: VMX: more MSR_IA32_VMX_EPT_VPID_CAP capability bits
Required for EPT misconfiguration handler.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Fri, 12 Jun 2009 20:01:29 +0000 (22:01 +0200)]
KVM: Move performance counter MSR access interception to generic x86 path
The performance counter MSRs are different for AMD and Intel CPUs and they
are chosen mainly by the CPUID vendor string. This patch catches writes to
all addresses (regardless of VMX/SVM path) and handles them in the generic
MSR handler routine. Writing a 0 into the event select register is something
we perfectly emulate ;-), so don't print out a warning to dmesg in this
case.
This fixes booting a 64bit Windows guest with an AMD CPUID on an Intel host.
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:08 +0000 (12:27 -0300)]
KVM: MMU audit: largepage handling
Make the audit code aware of largepages.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:07 +0000 (12:27 -0300)]
KVM: MMU audit: audit_mappings tweaks
- Fail early in case gfn_to_pfn returns is_error_pfn.
- For the pre pte write case, avoid spurious "gva is valid but spte is notrap"
messages (the emulation code does the guest write first, so this particular
case is OK).
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:06 +0000 (12:27 -0300)]
KVM: MMU audit: nontrapping ptes in nonleaf level
It is valid to set non leaf sptes as notrap.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:05 +0000 (12:27 -0300)]
KVM: MMU audit: update audit_write_protection
- Unsync pages contain writable sptes in the rmap.
- rmaps do not exclusively contain writable sptes anymore.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:04 +0000 (12:27 -0300)]
KVM: MMU audit: update count_writable_mappings / count_rmaps
Under testing, count_writable_mappings returns a value that is 2 integers
larger than what count_rmaps returns.
Suspicion is that either of the two functions is counting a duplicate (either
positively or negatively).
Modifying check_writable_mappings_rmap to check for rmap existance on
all present MMU pages fails to trigger an error, which should keep Avi
happy.
Also introduce mmu_spte_walk to invoke a callback on all present sptes visible
to the current vcpu, might be useful in the future.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Wed, 10 Jun 2009 15:27:03 +0000 (12:27 -0300)]
KVM: MMU: introduce is_last_spte helper
Hiding some of the last largepage / level interaction (which is useful
for gbpages and for zero based levels).
Also merge the PT_PAGE_TABLE_LEVEL clearing loop in unlink_children.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Thu, 11 Jun 2009 12:43:28 +0000 (15:43 +0300)]
KVM: Return to userspace on emulation failure
Instead of mindlessly retrying to execute the instruction, report the
failure to userspace.
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Tue, 9 Jun 2009 12:56:29 +0000 (15:56 +0300)]
KVM: Use macro to iterate over vcpus.
[christian: remove unused variables on s390]
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Tue, 9 Jun 2009 12:56:28 +0000 (15:56 +0300)]
KVM: Break dependency between vcpu index in vcpus array and vcpu_id.
Archs are free to use vcpu_id as they see fit. For x86 it is used as
vcpu's apic id. New ioctl is added to configure boot vcpu id that was
assumed to be 0 till now.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Tue, 9 Jun 2009 12:56:27 +0000 (15:56 +0300)]
KVM: Use pointer to vcpu instead of vcpu_id in timer code.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Tue, 9 Jun 2009 12:56:26 +0000 (15:56 +0300)]
KVM: Introduce kvm_vcpu_is_bsp() function.
Use it instead of open code "vcpu_id zero is BSP" assumption.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 10 Jun 2009 11:24:23 +0000 (14:24 +0300)]
KVM: MMU: s/shadow_pte/spte/
We use shadow_pte and spte inconsistently, switch to the shorter spelling.
Rename set_shadow_pte() to __set_spte() to avoid a conflict with the
existing set_spte(), and to indicate its lowlevelness.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 10 Jun 2009 11:12:05 +0000 (14:12 +0300)]
KVM: MMU: Adjust pte accessors to explicitly indicate guest or shadow pte
Since the guest and host ptes can have wildly different format, adjust
the pte accessor names to indicate on which type of pte they operate on.
No functional changes.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 10 Jun 2009 09:56:54 +0000 (12:56 +0300)]
KVM: MMU: Fix is_dirty_pte()
is_dirty_pte() is used on guest ptes, not shadow ptes, so it needs to avoid
shadow_dirty_mask and use PT_DIRTY_MASK instead.
Misdetecting dirty pages could lead to unnecessarily setting the dirty bit
under EPT.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Tue, 9 Jun 2009 11:10:45 +0000 (14:10 +0300)]
KVM: VMX: Move rmode structure to vmx-specific code
rmode is only used in vmx, so move it to vmx.c
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Tue, 9 Jun 2009 08:33:36 +0000 (11:33 +0300)]
KVM: Reorder ioctls in kvm.h
Somehow the VM ioctls got unsorted; resort.
Signed-off-by: Avi Kivity <avi@redhat.com>
Nitin A Kamble [Mon, 8 Jun 2009 18:34:16 +0000 (11:34 -0700)]
KVM: VMX: Support Unrestricted Guest feature
"Unrestricted Guest" feature is added in the VMX specification.
Intel Westmere and onwards processors will support this feature.
It allows kvm guests to run real mode and unpaged mode
code natively in the VMX mode when EPT is turned on. With the
unrestricted guest there is no need to emulate the guest real mode code
in the vm86 container or in the emulator. Also the guest big real mode
code works like native.
The attached patch enhances KVM to use the unrestricted guest feature
if available on the processor. It also adds a new kernel/module
parameter to disable the unrestricted guest feature at the boot time.
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 4 Jun 2009 18:08:24 +0000 (15:08 -0300)]
KVM: switch irq injection/acking data structures to irq_lock
Protect irq injection/acking data structures with a separate irq_lock
mutex. This fixes the following deadlock:
CPU A CPU B
kvm_vm_ioctl_deassign_dev_irq()
mutex_lock(&kvm->lock); worker_thread()
-> kvm_deassign_irq() -> kvm_assigned_dev_interrupt_work_handler()
-> deassign_host_irq() mutex_lock(&kvm->lock);
-> cancel_work_sync() [blocked]
[gleb: fix ia64 path]
Reported-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 4 Jun 2009 18:08:23 +0000 (15:08 -0300)]
KVM: introduce irq_lock, use it to protect ioapic
Introduce irq_lock, and use to protect ioapic data structures.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 4 Jun 2009 18:08:22 +0000 (15:08 -0300)]
KVM: move coalesced_mmio locking to its own device
Move coalesced_mmio locking to its own device, instead of relying on
kvm->lock.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Marcelo Tosatti [Thu, 4 Jun 2009 18:08:21 +0000 (15:08 -0300)]
KVM: Grab pic lock in kvm_pic_clear_isr_ack
isr_ack is protected by kvm_pic->lock.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jan Kiszka [Fri, 5 Jun 2009 14:13:34 +0000 (16:13 +0200)]
KVM: Cleanup LAPIC interface
None of the interface services the LAPIC emulation provides need to be
exported to modules, and kvm_lapic_get_base is even totally unused
today.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Liu Yu [Fri, 5 Jun 2009 06:54:31 +0000 (14:54 +0800)]
KVM: ppc: e500: Add MMUCFG and PVR emulation
Latest kernel started to use these two registers.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Liu Yu [Fri, 5 Jun 2009 06:54:30 +0000 (14:54 +0800)]
KVM: ppc: e500: Directly pass pvr to guest
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Liu Yu [Fri, 5 Jun 2009 06:54:29 +0000 (14:54 +0800)]
KVM: ppc: e500: Move to Book-3e MMU definitions
According to commit
70fe3af8403f85196bb74f22ce4813db7dfedc1a.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Thu, 4 Jun 2009 15:09:08 +0000 (18:09 +0300)]
KVM: Calculate available entries in coalesced mmio ring
Instead of checking whether we'll wrap around, calculate how many entries
are available, and check whether we have enough (just one) for the pending
mmio.
By itself, this doesn't change anything, but it paves the way for making
this function lockless.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Wed, 3 Jun 2009 11:12:10 +0000 (14:12 +0300)]
KVM: VMX: Fix reporting of unhandled EPT violations
Instead of returning -ENOTSUPP, exit normally but indicate the hardware
exit reason.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 31 May 2009 19:58:47 +0000 (22:58 +0300)]
KVM: Cache pdptrs
Instead of reloading the pdptrs on every entry and exit (vmcs writes on vmx,
guest memory access on svm) extract them on demand.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 31 May 2009 15:41:29 +0000 (18:41 +0300)]
KVM: VMX: Simplify pdptr and cr3 management
Instead of reading the PDPTRs from memory after every exit (which is slow
and wrong, as the PDPTRs are stored on the cpu), sync the PDPTRs from
memory to the VMCS before entry, and from the VMCS to memory after exit.
Do the same for cr3.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 31 May 2009 15:29:59 +0000 (18:29 +0300)]
KVM: VMX: Avoid duplicate ept tlb flush when setting cr3
vmx_set_cr3() will call vmx_tlb_flush(), which will flush the ept context.
So there is no need to call ept_sync_context() explicitly.
Signed-off-by: Avi Kivity <avi@redhat.com>
Gregory Haskins [Mon, 1 Jun 2009 16:54:56 +0000 (12:54 -0400)]
KVM: do not register i8254 PIO regions until we are initialized
We currently publish the i8254 resources to the pio_bus before the devices
are fully initialized. Since we hold the pit_lock, its probably not
a real issue. But lets clean this up anyway.
Reported-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gregory Haskins [Mon, 1 Jun 2009 16:54:50 +0000 (12:54 -0400)]
KVM: cleanup io_device code
We modernize the io_device code so that we use container_of() instead of
dev->private, and move the vtable to a separate ops structure
(theoretically allows better caching for multiple instances of the same
ops structure)
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gregory Haskins [Mon, 1 Jun 2009 16:54:45 +0000 (12:54 -0400)]
KVM: Clean up coalesced_mmio destruction
We invoke kfree() on a data member instead of the structure. This works today
because the kvm_io_device is the first element of the private structure, but
this could change in the future, so lets clean this up.
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
Stephen Rothwell [Tue, 2 Jun 2009 01:46:14 +0000 (11:46 +1000)]
KVM: powerpc: fix some init/exit annotations
Fixes a couple of warnings like this one:
WARNING: arch/powerpc/kvm/kvm-440.o(.text+0x1e8c): Section mismatch in reference from the function kvmppc_44x_exit() to the function .exit.text:kvmppc_booke_exit()
The function kvmppc_44x_exit() references a function in an exit section.
Often the function kvmppc_booke_exit() has valid usage outside the exit section
and the fix is to remove the __exit annotation of kvmppc_booke_exit.
Also add some __init annotations on obvious routines.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 31 May 2009 15:15:37 +0000 (18:15 +0300)]
KVM: SVM: Fold kvm_svm.h info svm.c
kvm_svm.h is only included from svm.c, so fold it in.
Signed-off-by: Avi Kivity <avi@redhat.com>
Christian Ehrhardt [Fri, 29 May 2009 10:58:50 +0000 (12:58 +0200)]
KVM: remove redundant declarations
Changing s390 code in kvm_arch_vcpu_load/put come across this header
declarations. They are complete duplicates, not even useful forward
declarations as nothing using it is in between (maybe it was that in
the past).
This patch removes the two dispensable lines.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Sheng Yang [Thu, 30 Apr 2009 02:58:42 +0000 (10:58 +0800)]
KVM: No disable_irq for MSI/MSI-X interrupt on device assignment
Disable interrupt at interrupt handler and enable it when guest ack is for
the level triggered interrupt, to prevent reinjected interrupt. MSI/MSI-X don't
need it.
One possible problem is multiply same vector interrupt injected between irq
handler and scheduled work handler would be merged as one for MSI/MSI-X.
But AFAIK, the drivers handle it well.
The patch fixed the oplin card performance issue(MSI-X performance is half of
MSI/INTx).
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Andre Przywara [Thu, 28 May 2009 09:56:31 +0000 (11:56 +0200)]
KVM: SVM: use explicit 64bit storage for sysenter values
Since AMD does not support sysenter in 64bit mode, the VMCB fields storing
the MSRs are truncated to 32bit upon VMRUN/#VMEXIT. So store the values
in a separate 64bit storage to avoid truncation.
[andre: fix amd->amd migration]
Signed-off-by: Christoph Egger <christoph.egger@amd.com>
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Sheng Yang [Thu, 21 May 2009 05:50:13 +0000 (13:50 +0800)]
KVM: Downsize max support MSI-X entry to 256
We only trap one page for MSI-X entry now, so it's 4k/(128/8) = 256 entries at
most.
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Christian Ehrhardt [Mon, 25 May 2009 11:40:51 +0000 (13:40 +0200)]
KVM: s390: streamline memslot handling
This patch relocates the variables kvm-s390 uses to track guest mem addr/size.
As discussed dropping the variables at struct kvm_arch level allows to use the
common vcpu->request based mechanism to reload guest memory if e.g. changes
via set_memory_region.
The kick mechanism introduced in this series is used to ensure running vcpus
leave guest state to catch the update.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Christian Ehrhardt [Wed, 20 May 2009 13:34:56 +0000 (15:34 +0200)]
KVM: s390: fix signal handling
If signal pending is true we exit without updating kvm_run, userspace
currently just does nothing and jumps to kvm_run again.
Since we did not set an exit_reason we might end up with a random one
(whatever was the last exit). Therefore it was possible to e.g. jump to
the psw position the last real interruption set.
Setting the INTR exit reason ensures that no old psw data is swapped
in on reentry.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Christian Ehrhardt [Wed, 20 May 2009 13:34:55 +0000 (15:34 +0200)]
KVM: s390: infrastructure to kick vcpus out of guest state
To ensure vcpu's come out of guest context in certain cases this patch adds a
s390 specific way to kick them out of guest context. Currently it kicks them
out to rerun the vcpu_run path in the s390 code, but the mechanism itself is
expandable and with a new flag we could also add e.g. kicks to userspace etc.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jes Sorensen [Mon, 25 May 2009 08:22:17 +0000 (10:22 +0200)]
KVM: ia64: Correct itc_offset calculations
Init the itc_offset for all possible vCPUs. The current code by
mistake ends up only initializing the offset on vCPU 0.
Spotted by Gleb Natapov.
Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by : Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jan Kiszka [Thu, 14 May 2009 20:42:53 +0000 (22:42 +0200)]
KVM: Allow PIT emulation without speaker port
The in-kernel speaker emulation is only a dummy and also unneeded from
the performance point of view. Rather, it takes user space support to
generate sound output on the host, e.g. console beeps.
To allow this, introduce KVM_CREATE_PIT2 which controls in-kernel
speaker port emulation via a flag passed along the new IOCTL. It also
leaves room for future extensions of the PIT configuration interface.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gregory Haskins [Wed, 20 May 2009 14:30:49 +0000 (10:30 -0400)]
KVM: irqfd
KVM provides a complete virtual system environment for guests, including
support for injecting interrupts modeled after the real exception/interrupt
facilities present on the native platform (such as the IDT on x86).
Virtual interrupts can come from a variety of sources (emulated devices,
pass-through devices, etc) but all must be injected to the guest via
the KVM infrastructure. This patch adds a new mechanism to inject a specific
interrupt to a guest using a decoupled eventfd mechnanism: Any legal signal
on the irqfd (using eventfd semantics from either userspace or kernel) will
translate into an injected interrupt in the guest at the next available
interrupt window.
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Thu, 21 May 2009 13:45:19 +0000 (16:45 +0300)]
KVM: Move common KVM Kconfig items to new file virt/kvm/Kconfig
Reduce Kconfig code duplication.
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Mon, 18 May 2009 08:44:06 +0000 (11:44 +0300)]
KVM: Drop interrupt shadow when single stepping should be done only on VMX
The problem exists only on VMX. Also currently we skip this step if
there is pending exception. The patch fixes this too.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Christoph Hellwig [Mon, 18 May 2009 12:16:14 +0000 (08:16 -0400)]
KVM: cleanup arch/x86/kvm/Makefile
Use proper foo-y style list additions to cleanup all the conditionals,
move module selection after compound object selection and remove the
superflous comment.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Mon, 18 May 2009 13:15:20 +0000 (16:15 +0300)]
KVM: x86 emulator: fix jmp far decoding (opcode 0xea)
The jump target should not be sign extened; use an unsigned decode flag.
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Mon, 18 May 2009 13:13:45 +0000 (16:13 +0300)]
KVM: x86 emulator: Implement zero-extended immediate decoding
Absolute jumps use zero extended immediate operands.
Cc: stable@kernel.org
Signed-off-by: Avi Kivity <avi@redhat.com>
Mark McLoughlin [Tue, 12 May 2009 11:36:44 +0000 (12:36 +0100)]
KVM: fix cpuid E2BIG handling for extended request types
If we run out of cpuid entries for extended request types
we should return -E2BIG, just like we do for the standard
request types.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jaswinder Singh Rajput [Thu, 14 May 2009 05:30:10 +0000 (11:00 +0530)]
KVM: Use MSR names in place of address
Replace 0xc0010010 with MSR_K8_SYSCFG and 0xc0010015 with MSR_K7_HWCR.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Huang Ying [Mon, 11 May 2009 08:48:15 +0000 (16:48 +0800)]
KVM: Add MCE support
The related MSRs are emulated. MCE capability is exported via
extension KVM_CAP_MCE and ioctl KVM_X86_GET_MCE_CAP_SUPPORTED. A new
vcpu ioctl command KVM_X86_SETUP_MCE is used to setup MCE emulation
such as the mcg_cap. MCE is injected via vcpu ioctl command
KVM_X86_SET_MCE. Extended machine-check state (MCG_EXT_P) and CMCI are
not implemented.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jaswinder Singh Rajput [Fri, 15 May 2009 13:12:05 +0000 (18:42 +0530)]
KVM: Replace MSR_IA32_TIME_STAMP_COUNTER with MSR_IA32_TSC of msr-index.h
Use standard msr-index.h's MSR declaration.
MSR_IA32_TSC is better than MSR_IA32_TIME_STAMP_COUNTER as it also solves
80 column issue.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Tue, 19 May 2009 08:07:10 +0000 (11:07 +0300)]
KVM: VMX: Properly handle software interrupt re-injection in real mode
When reinjecting a software interrupt or exception, use the correct
instruction length provided by the hardware instead of a hardcoded 1.
Fixes problems running the suse 9.1 livecd boot loader.
Problem introduced by commit
f0a3602c20 ("KVM: Move interrupt injection
logic to x86.c").
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Linus Torvalds [Wed, 9 Sep 2009 22:13:59 +0000 (15:13 -0700)]
Linux 2.6.31
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