obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_X86_MCE) += mce.o therm_throt.o
obj-$(CONFIG_X86_MCE_INTEL) += mce_intel.o
-obj-$(CONFIG_X86_MCE_AMD) += mce_amd.o
+obj-$(CONFIG_X86_MCE_AMD) += mce_amd_64.o
obj-$(CONFIG_MTRR) += ../../i386/kernel/cpu/mtrr/
obj-$(CONFIG_ACPI) += acpi/
obj-$(CONFIG_X86_MSR) += msr.o
+++ /dev/null
-/*
- * (c) 2005, 2006 Advanced Micro Devices, Inc.
- * Your use of this code is subject to the terms and conditions of the
- * GNU general public license version 2. See "COPYING" or
- * http://www.gnu.org/licenses/gpl.html
- *
- * Written by Jacob Shin - AMD, Inc.
- *
- * Support : jacob.shin@amd.com
- *
- * April 2006
- * - added support for AMD Family 0x10 processors
- *
- * All MC4_MISCi registers are shared between multi-cores
- */
-
-#include <linux/cpu.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/kobject.h>
-#include <linux/notifier.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/sysdev.h>
-#include <linux/sysfs.h>
-#include <asm/apic.h>
-#include <asm/mce.h>
-#include <asm/msr.h>
-#include <asm/percpu.h>
-#include <asm/idle.h>
-
-#define PFX "mce_threshold: "
-#define VERSION "version 1.1.1"
-#define NR_BANKS 6
-#define NR_BLOCKS 9
-#define THRESHOLD_MAX 0xFFF
-#define INT_TYPE_APIC 0x00020000
-#define MASK_VALID_HI 0x80000000
-#define MASK_CNTP_HI 0x40000000
-#define MASK_LOCKED_HI 0x20000000
-#define MASK_LVTOFF_HI 0x00F00000
-#define MASK_COUNT_EN_HI 0x00080000
-#define MASK_INT_TYPE_HI 0x00060000
-#define MASK_OVERFLOW_HI 0x00010000
-#define MASK_ERR_COUNT_HI 0x00000FFF
-#define MASK_BLKPTR_LO 0xFF000000
-#define MCG_XBLK_ADDR 0xC0000400
-
-struct threshold_block {
- unsigned int block;
- unsigned int bank;
- unsigned int cpu;
- u32 address;
- u16 interrupt_enable;
- u16 threshold_limit;
- struct kobject kobj;
- struct list_head miscj;
-};
-
-/* defaults used early on boot */
-static struct threshold_block threshold_defaults = {
- .interrupt_enable = 0,
- .threshold_limit = THRESHOLD_MAX,
-};
-
-struct threshold_bank {
- struct kobject kobj;
- struct threshold_block *blocks;
- cpumask_t cpus;
-};
-static DEFINE_PER_CPU(struct threshold_bank *, threshold_banks[NR_BANKS]);
-
-#ifdef CONFIG_SMP
-static unsigned char shared_bank[NR_BANKS] = {
- 0, 0, 0, 0, 1
-};
-#endif
-
-static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */
-
-/*
- * CPU Initialization
- */
-
-/* must be called with correct cpu affinity */
-static void threshold_restart_bank(struct threshold_block *b,
- int reset, u16 old_limit)
-{
- u32 mci_misc_hi, mci_misc_lo;
-
- rdmsr(b->address, mci_misc_lo, mci_misc_hi);
-
- if (b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
- reset = 1; /* limit cannot be lower than err count */
-
- if (reset) { /* reset err count and overflow bit */
- mci_misc_hi =
- (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
- (THRESHOLD_MAX - b->threshold_limit);
- } else if (old_limit) { /* change limit w/o reset */
- int new_count = (mci_misc_hi & THRESHOLD_MAX) +
- (old_limit - b->threshold_limit);
- mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
- (new_count & THRESHOLD_MAX);
- }
-
- b->interrupt_enable ?
- (mci_misc_hi = (mci_misc_hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) :
- (mci_misc_hi &= ~MASK_INT_TYPE_HI);
-
- mci_misc_hi |= MASK_COUNT_EN_HI;
- wrmsr(b->address, mci_misc_lo, mci_misc_hi);
-}
-
-/* cpu init entry point, called from mce.c with preempt off */
-void __cpuinit mce_amd_feature_init(struct cpuinfo_x86 *c)
-{
- unsigned int bank, block;
- unsigned int cpu = smp_processor_id();
- u32 low = 0, high = 0, address = 0;
-
- for (bank = 0; bank < NR_BANKS; ++bank) {
- for (block = 0; block < NR_BLOCKS; ++block) {
- if (block == 0)
- address = MSR_IA32_MC0_MISC + bank * 4;
- else if (block == 1) {
- address = (low & MASK_BLKPTR_LO) >> 21;
- if (!address)
- break;
- address += MCG_XBLK_ADDR;
- }
- else
- ++address;
-
- if (rdmsr_safe(address, &low, &high))
- break;
-
- if (!(high & MASK_VALID_HI)) {
- if (block)
- continue;
- else
- break;
- }
-
- if (!(high & MASK_CNTP_HI) ||
- (high & MASK_LOCKED_HI))
- continue;
-
- if (!block)
- per_cpu(bank_map, cpu) |= (1 << bank);
-#ifdef CONFIG_SMP
- if (shared_bank[bank] && c->cpu_core_id)
- break;
-#endif
- high &= ~MASK_LVTOFF_HI;
- high |= K8_APIC_EXT_LVT_ENTRY_THRESHOLD << 20;
- wrmsr(address, low, high);
-
- setup_APIC_extended_lvt(K8_APIC_EXT_LVT_ENTRY_THRESHOLD,
- THRESHOLD_APIC_VECTOR,
- K8_APIC_EXT_INT_MSG_FIX, 0);
-
- threshold_defaults.address = address;
- threshold_restart_bank(&threshold_defaults, 0, 0);
- }
- }
-}
-
-/*
- * APIC Interrupt Handler
- */
-
-/*
- * threshold interrupt handler will service THRESHOLD_APIC_VECTOR.
- * the interrupt goes off when error_count reaches threshold_limit.
- * the handler will simply log mcelog w/ software defined bank number.
- */
-asmlinkage void mce_threshold_interrupt(void)
-{
- unsigned int bank, block;
- struct mce m;
- u32 low = 0, high = 0, address = 0;
-
- ack_APIC_irq();
- exit_idle();
- irq_enter();
-
- memset(&m, 0, sizeof(m));
- rdtscll(m.tsc);
- m.cpu = smp_processor_id();
-
- /* assume first bank caused it */
- for (bank = 0; bank < NR_BANKS; ++bank) {
- if (!(per_cpu(bank_map, m.cpu) & (1 << bank)))
- continue;
- for (block = 0; block < NR_BLOCKS; ++block) {
- if (block == 0)
- address = MSR_IA32_MC0_MISC + bank * 4;
- else if (block == 1) {
- address = (low & MASK_BLKPTR_LO) >> 21;
- if (!address)
- break;
- address += MCG_XBLK_ADDR;
- }
- else
- ++address;
-
- if (rdmsr_safe(address, &low, &high))
- break;
-
- if (!(high & MASK_VALID_HI)) {
- if (block)
- continue;
- else
- break;
- }
-
- if (!(high & MASK_CNTP_HI) ||
- (high & MASK_LOCKED_HI))
- continue;
-
- /* Log the machine check that caused the threshold
- event. */
- do_machine_check(NULL, 0);
-
- if (high & MASK_OVERFLOW_HI) {
- rdmsrl(address, m.misc);
- rdmsrl(MSR_IA32_MC0_STATUS + bank * 4,
- m.status);
- m.bank = K8_MCE_THRESHOLD_BASE
- + bank * NR_BLOCKS
- + block;
- mce_log(&m);
- goto out;
- }
- }
- }
-out:
- irq_exit();
-}
-
-/*
- * Sysfs Interface
- */
-
-struct threshold_attr {
- struct attribute attr;
- ssize_t(*show) (struct threshold_block *, char *);
- ssize_t(*store) (struct threshold_block *, const char *, size_t count);
-};
-
-static cpumask_t affinity_set(unsigned int cpu)
-{
- cpumask_t oldmask = current->cpus_allowed;
- cpumask_t newmask = CPU_MASK_NONE;
- cpu_set(cpu, newmask);
- set_cpus_allowed(current, newmask);
- return oldmask;
-}
-
-static void affinity_restore(cpumask_t oldmask)
-{
- set_cpus_allowed(current, oldmask);
-}
-
-#define SHOW_FIELDS(name) \
-static ssize_t show_ ## name(struct threshold_block * b, char *buf) \
-{ \
- return sprintf(buf, "%lx\n", (unsigned long) b->name); \
-}
-SHOW_FIELDS(interrupt_enable)
-SHOW_FIELDS(threshold_limit)
-
-static ssize_t store_interrupt_enable(struct threshold_block *b,
- const char *buf, size_t count)
-{
- char *end;
- cpumask_t oldmask;
- unsigned long new = simple_strtoul(buf, &end, 0);
- if (end == buf)
- return -EINVAL;
- b->interrupt_enable = !!new;
-
- oldmask = affinity_set(b->cpu);
- threshold_restart_bank(b, 0, 0);
- affinity_restore(oldmask);
-
- return end - buf;
-}
-
-static ssize_t store_threshold_limit(struct threshold_block *b,
- const char *buf, size_t count)
-{
- char *end;
- cpumask_t oldmask;
- u16 old;
- unsigned long new = simple_strtoul(buf, &end, 0);
- if (end == buf)
- return -EINVAL;
- if (new > THRESHOLD_MAX)
- new = THRESHOLD_MAX;
- if (new < 1)
- new = 1;
- old = b->threshold_limit;
- b->threshold_limit = new;
-
- oldmask = affinity_set(b->cpu);
- threshold_restart_bank(b, 0, old);
- affinity_restore(oldmask);
-
- return end - buf;
-}
-
-static ssize_t show_error_count(struct threshold_block *b, char *buf)
-{
- u32 high, low;
- cpumask_t oldmask;
- oldmask = affinity_set(b->cpu);
- rdmsr(b->address, low, high);
- affinity_restore(oldmask);
- return sprintf(buf, "%x\n",
- (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit));
-}
-
-static ssize_t store_error_count(struct threshold_block *b,
- const char *buf, size_t count)
-{
- cpumask_t oldmask;
- oldmask = affinity_set(b->cpu);
- threshold_restart_bank(b, 1, 0);
- affinity_restore(oldmask);
- return 1;
-}
-
-#define THRESHOLD_ATTR(_name,_mode,_show,_store) { \
- .attr = {.name = __stringify(_name), .mode = _mode }, \
- .show = _show, \
- .store = _store, \
-};
-
-#define RW_ATTR(name) \
-static struct threshold_attr name = \
- THRESHOLD_ATTR(name, 0644, show_## name, store_## name)
-
-RW_ATTR(interrupt_enable);
-RW_ATTR(threshold_limit);
-RW_ATTR(error_count);
-
-static struct attribute *default_attrs[] = {
- &interrupt_enable.attr,
- &threshold_limit.attr,
- &error_count.attr,
- NULL
-};
-
-#define to_block(k) container_of(k, struct threshold_block, kobj)
-#define to_attr(a) container_of(a, struct threshold_attr, attr)
-
-static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
-{
- struct threshold_block *b = to_block(kobj);
- struct threshold_attr *a = to_attr(attr);
- ssize_t ret;
- ret = a->show ? a->show(b, buf) : -EIO;
- return ret;
-}
-
-static ssize_t store(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t count)
-{
- struct threshold_block *b = to_block(kobj);
- struct threshold_attr *a = to_attr(attr);
- ssize_t ret;
- ret = a->store ? a->store(b, buf, count) : -EIO;
- return ret;
-}
-
-static struct sysfs_ops threshold_ops = {
- .show = show,
- .store = store,
-};
-
-static struct kobj_type threshold_ktype = {
- .sysfs_ops = &threshold_ops,
- .default_attrs = default_attrs,
-};
-
-static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
- unsigned int bank,
- unsigned int block,
- u32 address)
-{
- int err;
- u32 low, high;
- struct threshold_block *b = NULL;
-
- if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
- return 0;
-
- if (rdmsr_safe(address, &low, &high))
- return 0;
-
- if (!(high & MASK_VALID_HI)) {
- if (block)
- goto recurse;
- else
- return 0;
- }
-
- if (!(high & MASK_CNTP_HI) ||
- (high & MASK_LOCKED_HI))
- goto recurse;
-
- b = kzalloc(sizeof(struct threshold_block), GFP_KERNEL);
- if (!b)
- return -ENOMEM;
-
- b->block = block;
- b->bank = bank;
- b->cpu = cpu;
- b->address = address;
- b->interrupt_enable = 0;
- b->threshold_limit = THRESHOLD_MAX;
-
- INIT_LIST_HEAD(&b->miscj);
-
- if (per_cpu(threshold_banks, cpu)[bank]->blocks)
- list_add(&b->miscj,
- &per_cpu(threshold_banks, cpu)[bank]->blocks->miscj);
- else
- per_cpu(threshold_banks, cpu)[bank]->blocks = b;
-
- kobject_set_name(&b->kobj, "misc%i", block);
- b->kobj.parent = &per_cpu(threshold_banks, cpu)[bank]->kobj;
- b->kobj.ktype = &threshold_ktype;
- err = kobject_register(&b->kobj);
- if (err)
- goto out_free;
-recurse:
- if (!block) {
- address = (low & MASK_BLKPTR_LO) >> 21;
- if (!address)
- return 0;
- address += MCG_XBLK_ADDR;
- } else
- ++address;
-
- err = allocate_threshold_blocks(cpu, bank, ++block, address);
- if (err)
- goto out_free;
-
- return err;
-
-out_free:
- if (b) {
- kobject_unregister(&b->kobj);
- kfree(b);
- }
- return err;
-}
-
-/* symlinks sibling shared banks to first core. first core owns dir/files. */
-static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
-{
- int i, err = 0;
- struct threshold_bank *b = NULL;
- cpumask_t oldmask = CPU_MASK_NONE;
- char name[32];
-
- sprintf(name, "threshold_bank%i", bank);
-
-#ifdef CONFIG_SMP
- if (cpu_data[cpu].cpu_core_id && shared_bank[bank]) { /* symlink */
- i = first_cpu(cpu_core_map[cpu]);
-
- /* first core not up yet */
- if (cpu_data[i].cpu_core_id)
- goto out;
-
- /* already linked */
- if (per_cpu(threshold_banks, cpu)[bank])
- goto out;
-
- b = per_cpu(threshold_banks, i)[bank];
-
- if (!b)
- goto out;
-
- err = sysfs_create_link(&per_cpu(device_mce, cpu).kobj,
- &b->kobj, name);
- if (err)
- goto out;
-
- b->cpus = cpu_core_map[cpu];
- per_cpu(threshold_banks, cpu)[bank] = b;
- goto out;
- }
-#endif
-
- b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL);
- if (!b) {
- err = -ENOMEM;
- goto out;
- }
-
- kobject_set_name(&b->kobj, "threshold_bank%i", bank);
- b->kobj.parent = &per_cpu(device_mce, cpu).kobj;
-#ifndef CONFIG_SMP
- b->cpus = CPU_MASK_ALL;
-#else
- b->cpus = cpu_core_map[cpu];
-#endif
- err = kobject_register(&b->kobj);
- if (err)
- goto out_free;
-
- per_cpu(threshold_banks, cpu)[bank] = b;
-
- oldmask = affinity_set(cpu);
- err = allocate_threshold_blocks(cpu, bank, 0,
- MSR_IA32_MC0_MISC + bank * 4);
- affinity_restore(oldmask);
-
- if (err)
- goto out_free;
-
- for_each_cpu_mask(i, b->cpus) {
- if (i == cpu)
- continue;
-
- err = sysfs_create_link(&per_cpu(device_mce, i).kobj,
- &b->kobj, name);
- if (err)
- goto out;
-
- per_cpu(threshold_banks, i)[bank] = b;
- }
-
- goto out;
-
-out_free:
- per_cpu(threshold_banks, cpu)[bank] = NULL;
- kfree(b);
-out:
- return err;
-}
-
-/* create dir/files for all valid threshold banks */
-static __cpuinit int threshold_create_device(unsigned int cpu)
-{
- unsigned int bank;
- int err = 0;
-
- for (bank = 0; bank < NR_BANKS; ++bank) {
- if (!(per_cpu(bank_map, cpu) & 1 << bank))
- continue;
- err = threshold_create_bank(cpu, bank);
- if (err)
- goto out;
- }
-out:
- return err;
-}
-
-/*
- * let's be hotplug friendly.
- * in case of multiple core processors, the first core always takes ownership
- * of shared sysfs dir/files, and rest of the cores will be symlinked to it.
- */
-
-static void deallocate_threshold_block(unsigned int cpu,
- unsigned int bank)
-{
- struct threshold_block *pos = NULL;
- struct threshold_block *tmp = NULL;
- struct threshold_bank *head = per_cpu(threshold_banks, cpu)[bank];
-
- if (!head)
- return;
-
- list_for_each_entry_safe(pos, tmp, &head->blocks->miscj, miscj) {
- kobject_unregister(&pos->kobj);
- list_del(&pos->miscj);
- kfree(pos);
- }
-
- kfree(per_cpu(threshold_banks, cpu)[bank]->blocks);
- per_cpu(threshold_banks, cpu)[bank]->blocks = NULL;
-}
-
-static void threshold_remove_bank(unsigned int cpu, int bank)
-{
- int i = 0;
- struct threshold_bank *b;
- char name[32];
-
- b = per_cpu(threshold_banks, cpu)[bank];
-
- if (!b)
- return;
-
- if (!b->blocks)
- goto free_out;
-
- sprintf(name, "threshold_bank%i", bank);
-
-#ifdef CONFIG_SMP
- /* sibling symlink */
- if (shared_bank[bank] && b->blocks->cpu != cpu) {
- sysfs_remove_link(&per_cpu(device_mce, cpu).kobj, name);
- per_cpu(threshold_banks, cpu)[bank] = NULL;
- return;
- }
-#endif
-
- /* remove all sibling symlinks before unregistering */
- for_each_cpu_mask(i, b->cpus) {
- if (i == cpu)
- continue;
-
- sysfs_remove_link(&per_cpu(device_mce, i).kobj, name);
- per_cpu(threshold_banks, i)[bank] = NULL;
- }
-
- deallocate_threshold_block(cpu, bank);
-
-free_out:
- kobject_unregister(&b->kobj);
- kfree(b);
- per_cpu(threshold_banks, cpu)[bank] = NULL;
-}
-
-static void threshold_remove_device(unsigned int cpu)
-{
- unsigned int bank;
-
- for (bank = 0; bank < NR_BANKS; ++bank) {
- if (!(per_cpu(bank_map, cpu) & 1 << bank))
- continue;
- threshold_remove_bank(cpu, bank);
- }
-}
-
-/* get notified when a cpu comes on/off */
-static int threshold_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- /* cpu was unsigned int to begin with */
- unsigned int cpu = (unsigned long)hcpu;
-
- if (cpu >= NR_CPUS)
- goto out;
-
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- threshold_create_device(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- threshold_remove_device(cpu);
- break;
- default:
- break;
- }
- out:
- return NOTIFY_OK;
-}
-
-static struct notifier_block threshold_cpu_notifier = {
- .notifier_call = threshold_cpu_callback,
-};
-
-static __init int threshold_init_device(void)
-{
- unsigned lcpu = 0;
-
- /* to hit CPUs online before the notifier is up */
- for_each_online_cpu(lcpu) {
- int err = threshold_create_device(lcpu);
- if (err)
- return err;
- }
- register_hotcpu_notifier(&threshold_cpu_notifier);
- return 0;
-}
-
-device_initcall(threshold_init_device);
--- /dev/null
+/*
+ * (c) 2005, 2006 Advanced Micro Devices, Inc.
+ * Your use of this code is subject to the terms and conditions of the
+ * GNU general public license version 2. See "COPYING" or
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ * Written by Jacob Shin - AMD, Inc.
+ *
+ * Support : jacob.shin@amd.com
+ *
+ * April 2006
+ * - added support for AMD Family 0x10 processors
+ *
+ * All MC4_MISCi registers are shared between multi-cores
+ */
+
+#include <linux/cpu.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kobject.h>
+#include <linux/notifier.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/sysdev.h>
+#include <linux/sysfs.h>
+#include <asm/apic.h>
+#include <asm/mce.h>
+#include <asm/msr.h>
+#include <asm/percpu.h>
+#include <asm/idle.h>
+
+#define PFX "mce_threshold: "
+#define VERSION "version 1.1.1"
+#define NR_BANKS 6
+#define NR_BLOCKS 9
+#define THRESHOLD_MAX 0xFFF
+#define INT_TYPE_APIC 0x00020000
+#define MASK_VALID_HI 0x80000000
+#define MASK_CNTP_HI 0x40000000
+#define MASK_LOCKED_HI 0x20000000
+#define MASK_LVTOFF_HI 0x00F00000
+#define MASK_COUNT_EN_HI 0x00080000
+#define MASK_INT_TYPE_HI 0x00060000
+#define MASK_OVERFLOW_HI 0x00010000
+#define MASK_ERR_COUNT_HI 0x00000FFF
+#define MASK_BLKPTR_LO 0xFF000000
+#define MCG_XBLK_ADDR 0xC0000400
+
+struct threshold_block {
+ unsigned int block;
+ unsigned int bank;
+ unsigned int cpu;
+ u32 address;
+ u16 interrupt_enable;
+ u16 threshold_limit;
+ struct kobject kobj;
+ struct list_head miscj;
+};
+
+/* defaults used early on boot */
+static struct threshold_block threshold_defaults = {
+ .interrupt_enable = 0,
+ .threshold_limit = THRESHOLD_MAX,
+};
+
+struct threshold_bank {
+ struct kobject kobj;
+ struct threshold_block *blocks;
+ cpumask_t cpus;
+};
+static DEFINE_PER_CPU(struct threshold_bank *, threshold_banks[NR_BANKS]);
+
+#ifdef CONFIG_SMP
+static unsigned char shared_bank[NR_BANKS] = {
+ 0, 0, 0, 0, 1
+};
+#endif
+
+static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */
+
+/*
+ * CPU Initialization
+ */
+
+/* must be called with correct cpu affinity */
+static void threshold_restart_bank(struct threshold_block *b,
+ int reset, u16 old_limit)
+{
+ u32 mci_misc_hi, mci_misc_lo;
+
+ rdmsr(b->address, mci_misc_lo, mci_misc_hi);
+
+ if (b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
+ reset = 1; /* limit cannot be lower than err count */
+
+ if (reset) { /* reset err count and overflow bit */
+ mci_misc_hi =
+ (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
+ (THRESHOLD_MAX - b->threshold_limit);
+ } else if (old_limit) { /* change limit w/o reset */
+ int new_count = (mci_misc_hi & THRESHOLD_MAX) +
+ (old_limit - b->threshold_limit);
+ mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
+ (new_count & THRESHOLD_MAX);
+ }
+
+ b->interrupt_enable ?
+ (mci_misc_hi = (mci_misc_hi & ~MASK_INT_TYPE_HI) | INT_TYPE_APIC) :
+ (mci_misc_hi &= ~MASK_INT_TYPE_HI);
+
+ mci_misc_hi |= MASK_COUNT_EN_HI;
+ wrmsr(b->address, mci_misc_lo, mci_misc_hi);
+}
+
+/* cpu init entry point, called from mce.c with preempt off */
+void __cpuinit mce_amd_feature_init(struct cpuinfo_x86 *c)
+{
+ unsigned int bank, block;
+ unsigned int cpu = smp_processor_id();
+ u32 low = 0, high = 0, address = 0;
+
+ for (bank = 0; bank < NR_BANKS; ++bank) {
+ for (block = 0; block < NR_BLOCKS; ++block) {
+ if (block == 0)
+ address = MSR_IA32_MC0_MISC + bank * 4;
+ else if (block == 1) {
+ address = (low & MASK_BLKPTR_LO) >> 21;
+ if (!address)
+ break;
+ address += MCG_XBLK_ADDR;
+ }
+ else
+ ++address;
+
+ if (rdmsr_safe(address, &low, &high))
+ break;
+
+ if (!(high & MASK_VALID_HI)) {
+ if (block)
+ continue;
+ else
+ break;
+ }
+
+ if (!(high & MASK_CNTP_HI) ||
+ (high & MASK_LOCKED_HI))
+ continue;
+
+ if (!block)
+ per_cpu(bank_map, cpu) |= (1 << bank);
+#ifdef CONFIG_SMP
+ if (shared_bank[bank] && c->cpu_core_id)
+ break;
+#endif
+ high &= ~MASK_LVTOFF_HI;
+ high |= K8_APIC_EXT_LVT_ENTRY_THRESHOLD << 20;
+ wrmsr(address, low, high);
+
+ setup_APIC_extended_lvt(K8_APIC_EXT_LVT_ENTRY_THRESHOLD,
+ THRESHOLD_APIC_VECTOR,
+ K8_APIC_EXT_INT_MSG_FIX, 0);
+
+ threshold_defaults.address = address;
+ threshold_restart_bank(&threshold_defaults, 0, 0);
+ }
+ }
+}
+
+/*
+ * APIC Interrupt Handler
+ */
+
+/*
+ * threshold interrupt handler will service THRESHOLD_APIC_VECTOR.
+ * the interrupt goes off when error_count reaches threshold_limit.
+ * the handler will simply log mcelog w/ software defined bank number.
+ */
+asmlinkage void mce_threshold_interrupt(void)
+{
+ unsigned int bank, block;
+ struct mce m;
+ u32 low = 0, high = 0, address = 0;
+
+ ack_APIC_irq();
+ exit_idle();
+ irq_enter();
+
+ memset(&m, 0, sizeof(m));
+ rdtscll(m.tsc);
+ m.cpu = smp_processor_id();
+
+ /* assume first bank caused it */
+ for (bank = 0; bank < NR_BANKS; ++bank) {
+ if (!(per_cpu(bank_map, m.cpu) & (1 << bank)))
+ continue;
+ for (block = 0; block < NR_BLOCKS; ++block) {
+ if (block == 0)
+ address = MSR_IA32_MC0_MISC + bank * 4;
+ else if (block == 1) {
+ address = (low & MASK_BLKPTR_LO) >> 21;
+ if (!address)
+ break;
+ address += MCG_XBLK_ADDR;
+ }
+ else
+ ++address;
+
+ if (rdmsr_safe(address, &low, &high))
+ break;
+
+ if (!(high & MASK_VALID_HI)) {
+ if (block)
+ continue;
+ else
+ break;
+ }
+
+ if (!(high & MASK_CNTP_HI) ||
+ (high & MASK_LOCKED_HI))
+ continue;
+
+ /* Log the machine check that caused the threshold
+ event. */
+ do_machine_check(NULL, 0);
+
+ if (high & MASK_OVERFLOW_HI) {
+ rdmsrl(address, m.misc);
+ rdmsrl(MSR_IA32_MC0_STATUS + bank * 4,
+ m.status);
+ m.bank = K8_MCE_THRESHOLD_BASE
+ + bank * NR_BLOCKS
+ + block;
+ mce_log(&m);
+ goto out;
+ }
+ }
+ }
+out:
+ irq_exit();
+}
+
+/*
+ * Sysfs Interface
+ */
+
+struct threshold_attr {
+ struct attribute attr;
+ ssize_t(*show) (struct threshold_block *, char *);
+ ssize_t(*store) (struct threshold_block *, const char *, size_t count);
+};
+
+static cpumask_t affinity_set(unsigned int cpu)
+{
+ cpumask_t oldmask = current->cpus_allowed;
+ cpumask_t newmask = CPU_MASK_NONE;
+ cpu_set(cpu, newmask);
+ set_cpus_allowed(current, newmask);
+ return oldmask;
+}
+
+static void affinity_restore(cpumask_t oldmask)
+{
+ set_cpus_allowed(current, oldmask);
+}
+
+#define SHOW_FIELDS(name) \
+static ssize_t show_ ## name(struct threshold_block * b, char *buf) \
+{ \
+ return sprintf(buf, "%lx\n", (unsigned long) b->name); \
+}
+SHOW_FIELDS(interrupt_enable)
+SHOW_FIELDS(threshold_limit)
+
+static ssize_t store_interrupt_enable(struct threshold_block *b,
+ const char *buf, size_t count)
+{
+ char *end;
+ cpumask_t oldmask;
+ unsigned long new = simple_strtoul(buf, &end, 0);
+ if (end == buf)
+ return -EINVAL;
+ b->interrupt_enable = !!new;
+
+ oldmask = affinity_set(b->cpu);
+ threshold_restart_bank(b, 0, 0);
+ affinity_restore(oldmask);
+
+ return end - buf;
+}
+
+static ssize_t store_threshold_limit(struct threshold_block *b,
+ const char *buf, size_t count)
+{
+ char *end;
+ cpumask_t oldmask;
+ u16 old;
+ unsigned long new = simple_strtoul(buf, &end, 0);
+ if (end == buf)
+ return -EINVAL;
+ if (new > THRESHOLD_MAX)
+ new = THRESHOLD_MAX;
+ if (new < 1)
+ new = 1;
+ old = b->threshold_limit;
+ b->threshold_limit = new;
+
+ oldmask = affinity_set(b->cpu);
+ threshold_restart_bank(b, 0, old);
+ affinity_restore(oldmask);
+
+ return end - buf;
+}
+
+static ssize_t show_error_count(struct threshold_block *b, char *buf)
+{
+ u32 high, low;
+ cpumask_t oldmask;
+ oldmask = affinity_set(b->cpu);
+ rdmsr(b->address, low, high);
+ affinity_restore(oldmask);
+ return sprintf(buf, "%x\n",
+ (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit));
+}
+
+static ssize_t store_error_count(struct threshold_block *b,
+ const char *buf, size_t count)
+{
+ cpumask_t oldmask;
+ oldmask = affinity_set(b->cpu);
+ threshold_restart_bank(b, 1, 0);
+ affinity_restore(oldmask);
+ return 1;
+}
+
+#define THRESHOLD_ATTR(_name,_mode,_show,_store) { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+};
+
+#define RW_ATTR(name) \
+static struct threshold_attr name = \
+ THRESHOLD_ATTR(name, 0644, show_## name, store_## name)
+
+RW_ATTR(interrupt_enable);
+RW_ATTR(threshold_limit);
+RW_ATTR(error_count);
+
+static struct attribute *default_attrs[] = {
+ &interrupt_enable.attr,
+ &threshold_limit.attr,
+ &error_count.attr,
+ NULL
+};
+
+#define to_block(k) container_of(k, struct threshold_block, kobj)
+#define to_attr(a) container_of(a, struct threshold_attr, attr)
+
+static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
+{
+ struct threshold_block *b = to_block(kobj);
+ struct threshold_attr *a = to_attr(attr);
+ ssize_t ret;
+ ret = a->show ? a->show(b, buf) : -EIO;
+ return ret;
+}
+
+static ssize_t store(struct kobject *kobj, struct attribute *attr,
+ const char *buf, size_t count)
+{
+ struct threshold_block *b = to_block(kobj);
+ struct threshold_attr *a = to_attr(attr);
+ ssize_t ret;
+ ret = a->store ? a->store(b, buf, count) : -EIO;
+ return ret;
+}
+
+static struct sysfs_ops threshold_ops = {
+ .show = show,
+ .store = store,
+};
+
+static struct kobj_type threshold_ktype = {
+ .sysfs_ops = &threshold_ops,
+ .default_attrs = default_attrs,
+};
+
+static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
+ unsigned int bank,
+ unsigned int block,
+ u32 address)
+{
+ int err;
+ u32 low, high;
+ struct threshold_block *b = NULL;
+
+ if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
+ return 0;
+
+ if (rdmsr_safe(address, &low, &high))
+ return 0;
+
+ if (!(high & MASK_VALID_HI)) {
+ if (block)
+ goto recurse;
+ else
+ return 0;
+ }
+
+ if (!(high & MASK_CNTP_HI) ||
+ (high & MASK_LOCKED_HI))
+ goto recurse;
+
+ b = kzalloc(sizeof(struct threshold_block), GFP_KERNEL);
+ if (!b)
+ return -ENOMEM;
+
+ b->block = block;
+ b->bank = bank;
+ b->cpu = cpu;
+ b->address = address;
+ b->interrupt_enable = 0;
+ b->threshold_limit = THRESHOLD_MAX;
+
+ INIT_LIST_HEAD(&b->miscj);
+
+ if (per_cpu(threshold_banks, cpu)[bank]->blocks)
+ list_add(&b->miscj,
+ &per_cpu(threshold_banks, cpu)[bank]->blocks->miscj);
+ else
+ per_cpu(threshold_banks, cpu)[bank]->blocks = b;
+
+ kobject_set_name(&b->kobj, "misc%i", block);
+ b->kobj.parent = &per_cpu(threshold_banks, cpu)[bank]->kobj;
+ b->kobj.ktype = &threshold_ktype;
+ err = kobject_register(&b->kobj);
+ if (err)
+ goto out_free;
+recurse:
+ if (!block) {
+ address = (low & MASK_BLKPTR_LO) >> 21;
+ if (!address)
+ return 0;
+ address += MCG_XBLK_ADDR;
+ } else
+ ++address;
+
+ err = allocate_threshold_blocks(cpu, bank, ++block, address);
+ if (err)
+ goto out_free;
+
+ return err;
+
+out_free:
+ if (b) {
+ kobject_unregister(&b->kobj);
+ kfree(b);
+ }
+ return err;
+}
+
+/* symlinks sibling shared banks to first core. first core owns dir/files. */
+static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
+{
+ int i, err = 0;
+ struct threshold_bank *b = NULL;
+ cpumask_t oldmask = CPU_MASK_NONE;
+ char name[32];
+
+ sprintf(name, "threshold_bank%i", bank);
+
+#ifdef CONFIG_SMP
+ if (cpu_data[cpu].cpu_core_id && shared_bank[bank]) { /* symlink */
+ i = first_cpu(cpu_core_map[cpu]);
+
+ /* first core not up yet */
+ if (cpu_data[i].cpu_core_id)
+ goto out;
+
+ /* already linked */
+ if (per_cpu(threshold_banks, cpu)[bank])
+ goto out;
+
+ b = per_cpu(threshold_banks, i)[bank];
+
+ if (!b)
+ goto out;
+
+ err = sysfs_create_link(&per_cpu(device_mce, cpu).kobj,
+ &b->kobj, name);
+ if (err)
+ goto out;
+
+ b->cpus = cpu_core_map[cpu];
+ per_cpu(threshold_banks, cpu)[bank] = b;
+ goto out;
+ }
+#endif
+
+ b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL);
+ if (!b) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ kobject_set_name(&b->kobj, "threshold_bank%i", bank);
+ b->kobj.parent = &per_cpu(device_mce, cpu).kobj;
+#ifndef CONFIG_SMP
+ b->cpus = CPU_MASK_ALL;
+#else
+ b->cpus = cpu_core_map[cpu];
+#endif
+ err = kobject_register(&b->kobj);
+ if (err)
+ goto out_free;
+
+ per_cpu(threshold_banks, cpu)[bank] = b;
+
+ oldmask = affinity_set(cpu);
+ err = allocate_threshold_blocks(cpu, bank, 0,
+ MSR_IA32_MC0_MISC + bank * 4);
+ affinity_restore(oldmask);
+
+ if (err)
+ goto out_free;
+
+ for_each_cpu_mask(i, b->cpus) {
+ if (i == cpu)
+ continue;
+
+ err = sysfs_create_link(&per_cpu(device_mce, i).kobj,
+ &b->kobj, name);
+ if (err)
+ goto out;
+
+ per_cpu(threshold_banks, i)[bank] = b;
+ }
+
+ goto out;
+
+out_free:
+ per_cpu(threshold_banks, cpu)[bank] = NULL;
+ kfree(b);
+out:
+ return err;
+}
+
+/* create dir/files for all valid threshold banks */
+static __cpuinit int threshold_create_device(unsigned int cpu)
+{
+ unsigned int bank;
+ int err = 0;
+
+ for (bank = 0; bank < NR_BANKS; ++bank) {
+ if (!(per_cpu(bank_map, cpu) & 1 << bank))
+ continue;
+ err = threshold_create_bank(cpu, bank);
+ if (err)
+ goto out;
+ }
+out:
+ return err;
+}
+
+/*
+ * let's be hotplug friendly.
+ * in case of multiple core processors, the first core always takes ownership
+ * of shared sysfs dir/files, and rest of the cores will be symlinked to it.
+ */
+
+static void deallocate_threshold_block(unsigned int cpu,
+ unsigned int bank)
+{
+ struct threshold_block *pos = NULL;
+ struct threshold_block *tmp = NULL;
+ struct threshold_bank *head = per_cpu(threshold_banks, cpu)[bank];
+
+ if (!head)
+ return;
+
+ list_for_each_entry_safe(pos, tmp, &head->blocks->miscj, miscj) {
+ kobject_unregister(&pos->kobj);
+ list_del(&pos->miscj);
+ kfree(pos);
+ }
+
+ kfree(per_cpu(threshold_banks, cpu)[bank]->blocks);
+ per_cpu(threshold_banks, cpu)[bank]->blocks = NULL;
+}
+
+static void threshold_remove_bank(unsigned int cpu, int bank)
+{
+ int i = 0;
+ struct threshold_bank *b;
+ char name[32];
+
+ b = per_cpu(threshold_banks, cpu)[bank];
+
+ if (!b)
+ return;
+
+ if (!b->blocks)
+ goto free_out;
+
+ sprintf(name, "threshold_bank%i", bank);
+
+#ifdef CONFIG_SMP
+ /* sibling symlink */
+ if (shared_bank[bank] && b->blocks->cpu != cpu) {
+ sysfs_remove_link(&per_cpu(device_mce, cpu).kobj, name);
+ per_cpu(threshold_banks, cpu)[bank] = NULL;
+ return;
+ }
+#endif
+
+ /* remove all sibling symlinks before unregistering */
+ for_each_cpu_mask(i, b->cpus) {
+ if (i == cpu)
+ continue;
+
+ sysfs_remove_link(&per_cpu(device_mce, i).kobj, name);
+ per_cpu(threshold_banks, i)[bank] = NULL;
+ }
+
+ deallocate_threshold_block(cpu, bank);
+
+free_out:
+ kobject_unregister(&b->kobj);
+ kfree(b);
+ per_cpu(threshold_banks, cpu)[bank] = NULL;
+}
+
+static void threshold_remove_device(unsigned int cpu)
+{
+ unsigned int bank;
+
+ for (bank = 0; bank < NR_BANKS; ++bank) {
+ if (!(per_cpu(bank_map, cpu) & 1 << bank))
+ continue;
+ threshold_remove_bank(cpu, bank);
+ }
+}
+
+/* get notified when a cpu comes on/off */
+static int threshold_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ /* cpu was unsigned int to begin with */
+ unsigned int cpu = (unsigned long)hcpu;
+
+ if (cpu >= NR_CPUS)
+ goto out;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ threshold_create_device(cpu);
+ break;
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ threshold_remove_device(cpu);
+ break;
+ default:
+ break;
+ }
+ out:
+ return NOTIFY_OK;
+}
+
+static struct notifier_block threshold_cpu_notifier = {
+ .notifier_call = threshold_cpu_callback,
+};
+
+static __init int threshold_init_device(void)
+{
+ unsigned lcpu = 0;
+
+ /* to hit CPUs online before the notifier is up */
+ for_each_online_cpu(lcpu) {
+ int err = threshold_create_device(lcpu);
+ if (err)
+ return err;
+ }
+ register_hotcpu_notifier(&threshold_cpu_notifier);
+ return 0;
+}
+
+device_initcall(threshold_init_device);
projects / deliverable / linux.git / commitdiff
