obj-$(CONFIG_X86_NEW_MCE) += mce-severity.o
obj-$(CONFIG_X86_OLD_MCE) += k7.o p4.o p6.o
obj-$(CONFIG_X86_ANCIENT_MCE) += winchip.o p5.o
-obj-$(CONFIG_X86_MCE_INTEL) += mce_intel_64.o
-obj-$(CONFIG_X86_MCE_AMD) += mce_amd_64.o
+obj-$(CONFIG_X86_MCE_INTEL) += mce_intel.o
+obj-$(CONFIG_X86_MCE_AMD) += mce_amd.o
obj-$(CONFIG_X86_MCE_NONFATAL) += non-fatal.o
obj-$(CONFIG_X86_MCE_THRESHOLD) += threshold.o
obj-$(CONFIG_X86_MCE_INJECT) += mce-inject.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/interrupt.h>
+#include <linux/notifier.h>
+#include <linux/kobject.h>
+#include <linux/percpu.h>
+#include <linux/sysdev.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/sysfs.h>
+#include <linux/init.h>
+#include <linux/cpu.h>
+#include <linux/smp.h>
+
+#include <asm/apic.h>
+#include <asm/idle.h>
+#include <asm/mce.h>
+#include <asm/msr.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_var_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 */
+
+static void amd_threshold_interrupt(void);
+
+/*
+ * CPU Initialization
+ */
+
+struct thresh_restart {
+ struct threshold_block *b;
+ int reset;
+ u16 old_limit;
+};
+
+/* must be called with correct cpu affinity */
+/* Called via smp_call_function_single() */
+static void threshold_restart_bank(void *_tr)
+{
+ struct thresh_restart *tr = _tr;
+ u32 mci_misc_hi, mci_misc_lo;
+
+ rdmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
+
+ if (tr->b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
+ tr->reset = 1; /* limit cannot be lower than err count */
+
+ if (tr->reset) { /* reset err count and overflow bit */
+ mci_misc_hi =
+ (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
+ (THRESHOLD_MAX - tr->b->threshold_limit);
+ } else if (tr->old_limit) { /* change limit w/o reset */
+ int new_count = (mci_misc_hi & THRESHOLD_MAX) +
+ (tr->old_limit - tr->b->threshold_limit);
+
+ mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
+ (new_count & THRESHOLD_MAX);
+ }
+
+ tr->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(tr->b->address, mci_misc_lo, mci_misc_hi);
+}
+
+/* cpu init entry point, called from mce.c with preempt off */
+void mce_amd_feature_init(struct cpuinfo_x86 *c)
+{
+ unsigned int cpu = smp_processor_id();
+ u32 low = 0, high = 0, address = 0;
+ unsigned int bank, block;
+ struct thresh_restart tr;
+ u8 lvt_off;
+
+ 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
+ lvt_off = setup_APIC_eilvt_mce(THRESHOLD_APIC_VECTOR,
+ APIC_EILVT_MSG_FIX, 0);
+
+ high &= ~MASK_LVTOFF_HI;
+ high |= lvt_off << 20;
+ wrmsr(address, low, high);
+
+ threshold_defaults.address = address;
+ tr.b = &threshold_defaults;
+ tr.reset = 0;
+ tr.old_limit = 0;
+ threshold_restart_bank(&tr);
+
+ mce_threshold_vector = amd_threshold_interrupt;
+ }
+ }
+}
+
+/*
+ * 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.
+ */
+static void amd_threshold_interrupt(void)
+{
+ u32 low = 0, high = 0, address = 0;
+ unsigned int bank, block;
+ struct mce m;
+
+ mce_setup(&m);
+
+ /* 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.
+ */
+ machine_check_poll(MCP_TIMESTAMP,
+ &__get_cpu_var(mce_poll_banks));
+
+ 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);
+ return;
+ }
+ }
+ }
+}
+
+/*
+ * 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);
+};
+
+#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 size)
+{
+ struct thresh_restart tr;
+ unsigned long new;
+
+ if (strict_strtoul(buf, 0, &new) < 0)
+ return -EINVAL;
+
+ b->interrupt_enable = !!new;
+
+ tr.b = b;
+ tr.reset = 0;
+ tr.old_limit = 0;
+
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
+
+ return size;
+}
+
+static ssize_t
+store_threshold_limit(struct threshold_block *b, const char *buf, size_t size)
+{
+ struct thresh_restart tr;
+ unsigned long new;
+
+ if (strict_strtoul(buf, 0, &new) < 0)
+ return -EINVAL;
+
+ if (new > THRESHOLD_MAX)
+ new = THRESHOLD_MAX;
+ if (new < 1)
+ new = 1;
+
+ tr.old_limit = b->threshold_limit;
+ b->threshold_limit = new;
+ tr.b = b;
+ tr.reset = 0;
+
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
+
+ return size;
+}
+
+struct threshold_block_cross_cpu {
+ struct threshold_block *tb;
+ long retval;
+};
+
+static void local_error_count_handler(void *_tbcc)
+{
+ struct threshold_block_cross_cpu *tbcc = _tbcc;
+ struct threshold_block *b = tbcc->tb;
+ u32 low, high;
+
+ rdmsr(b->address, low, high);
+ tbcc->retval = (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit);
+}
+
+static ssize_t show_error_count(struct threshold_block *b, char *buf)
+{
+ struct threshold_block_cross_cpu tbcc = { .tb = b, };
+
+ smp_call_function_single(b->cpu, local_error_count_handler, &tbcc, 1);
+ return sprintf(buf, "%lx\n", tbcc.retval);
+}
+
+static ssize_t store_error_count(struct threshold_block *b,
+ const char *buf, size_t count)
+{
+ struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 };
+
+ smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
+ return 1;
+}
+
+#define RW_ATTR(val) \
+static struct threshold_attr val = { \
+ .attr = {.name = __stringify(val), .mode = 0644 }, \
+ .show = show_## val, \
+ .store = store_## val, \
+};
+
+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)
+{
+ struct threshold_block *b = NULL;
+ u32 low, high;
+ int err;
+
+ if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
+ return 0;
+
+ if (rdmsr_safe_on_cpu(cpu, 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;
+ }
+
+ err = kobject_init_and_add(&b->kobj, &threshold_ktype,
+ per_cpu(threshold_banks, cpu)[bank]->kobj,
+ "misc%i", block);
+ 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;
+
+ if (b)
+ kobject_uevent(&b->kobj, KOBJ_ADD);
+
+ return err;
+
+out_free:
+ if (b) {
+ kobject_put(&b->kobj);
+ kfree(b);
+ }
+ return err;
+}
+
+static __cpuinit long
+local_allocate_threshold_blocks(int cpu, unsigned int bank)
+{
+ return allocate_threshold_blocks(cpu, bank, 0,
+ MSR_IA32_MC0_MISC + bank * 4);
+}
+
+/* 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;
+ char name[32];
+
+ sprintf(name, "threshold_bank%i", bank);
+
+#ifdef CONFIG_SMP
+ if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
+ i = cpumask_first(cpu_core_mask(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(mce_dev, cpu).kobj,
+ b->kobj, name);
+ if (err)
+ goto out;
+
+ cpumask_copy(b->cpus, cpu_core_mask(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;
+ }
+ if (!alloc_cpumask_var(&b->cpus, GFP_KERNEL)) {
+ kfree(b);
+ err = -ENOMEM;
+ goto out;
+ }
+
+ b->kobj = kobject_create_and_add(name, &per_cpu(mce_dev, cpu).kobj);
+ if (!b->kobj)
+ goto out_free;
+
+#ifndef CONFIG_SMP
+ cpumask_setall(b->cpus);
+#else
+ cpumask_copy(b->cpus, cpu_core_mask(cpu));
+#endif
+
+ per_cpu(threshold_banks, cpu)[bank] = b;
+
+ err = local_allocate_threshold_blocks(cpu, bank);
+ if (err)
+ goto out_free;
+
+ for_each_cpu(i, b->cpus) {
+ if (i == cpu)
+ continue;
+
+ err = sysfs_create_link(&per_cpu(mce_dev, 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;
+ free_cpumask_var(b->cpus);
+ 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_put(&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)
+{
+ struct threshold_bank *b;
+ char name[32];
+ int i = 0;
+
+ 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(mce_dev, cpu).kobj, name);
+ per_cpu(threshold_banks, cpu)[bank] = NULL;
+
+ return;
+ }
+#endif
+
+ /* remove all sibling symlinks before unregistering */
+ for_each_cpu(i, b->cpus) {
+ if (i == cpu)
+ continue;
+
+ sysfs_remove_link(&per_cpu(mce_dev, i).kobj, name);
+ per_cpu(threshold_banks, i)[bank] = NULL;
+ }
+
+ deallocate_threshold_block(cpu, bank);
+
+free_out:
+ kobject_del(b->kobj);
+ kobject_put(b->kobj);
+ free_cpumask_var(b->cpus);
+ 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 void __cpuinit
+amd_64_threshold_cpu_callback(unsigned long action, unsigned int cpu)
+{
+ 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;
+ }
+}
+
+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;
+ }
+ threshold_cpu_callback = amd_64_threshold_cpu_callback;
+
+ 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/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/kobject.h>
-#include <linux/percpu.h>
-#include <linux/sysdev.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/sysfs.h>
-#include <linux/init.h>
-#include <linux/cpu.h>
-#include <linux/smp.h>
-
-#include <asm/apic.h>
-#include <asm/idle.h>
-#include <asm/mce.h>
-#include <asm/msr.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_var_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 */
-
-static void amd_threshold_interrupt(void);
-
-/*
- * CPU Initialization
- */
-
-struct thresh_restart {
- struct threshold_block *b;
- int reset;
- u16 old_limit;
-};
-
-/* must be called with correct cpu affinity */
-/* Called via smp_call_function_single() */
-static void threshold_restart_bank(void *_tr)
-{
- struct thresh_restart *tr = _tr;
- u32 mci_misc_hi, mci_misc_lo;
-
- rdmsr(tr->b->address, mci_misc_lo, mci_misc_hi);
-
- if (tr->b->threshold_limit < (mci_misc_hi & THRESHOLD_MAX))
- tr->reset = 1; /* limit cannot be lower than err count */
-
- if (tr->reset) { /* reset err count and overflow bit */
- mci_misc_hi =
- (mci_misc_hi & ~(MASK_ERR_COUNT_HI | MASK_OVERFLOW_HI)) |
- (THRESHOLD_MAX - tr->b->threshold_limit);
- } else if (tr->old_limit) { /* change limit w/o reset */
- int new_count = (mci_misc_hi & THRESHOLD_MAX) +
- (tr->old_limit - tr->b->threshold_limit);
-
- mci_misc_hi = (mci_misc_hi & ~MASK_ERR_COUNT_HI) |
- (new_count & THRESHOLD_MAX);
- }
-
- tr->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(tr->b->address, mci_misc_lo, mci_misc_hi);
-}
-
-/* cpu init entry point, called from mce.c with preempt off */
-void mce_amd_feature_init(struct cpuinfo_x86 *c)
-{
- unsigned int cpu = smp_processor_id();
- u32 low = 0, high = 0, address = 0;
- unsigned int bank, block;
- struct thresh_restart tr;
- u8 lvt_off;
-
- 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
- lvt_off = setup_APIC_eilvt_mce(THRESHOLD_APIC_VECTOR,
- APIC_EILVT_MSG_FIX, 0);
-
- high &= ~MASK_LVTOFF_HI;
- high |= lvt_off << 20;
- wrmsr(address, low, high);
-
- threshold_defaults.address = address;
- tr.b = &threshold_defaults;
- tr.reset = 0;
- tr.old_limit = 0;
- threshold_restart_bank(&tr);
-
- mce_threshold_vector = amd_threshold_interrupt;
- }
- }
-}
-
-/*
- * 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.
- */
-static void amd_threshold_interrupt(void)
-{
- u32 low = 0, high = 0, address = 0;
- unsigned int bank, block;
- struct mce m;
-
- mce_setup(&m);
-
- /* 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.
- */
- machine_check_poll(MCP_TIMESTAMP,
- &__get_cpu_var(mce_poll_banks));
-
- 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);
- return;
- }
- }
- }
-}
-
-/*
- * 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);
-};
-
-#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 size)
-{
- struct thresh_restart tr;
- unsigned long new;
-
- if (strict_strtoul(buf, 0, &new) < 0)
- return -EINVAL;
-
- b->interrupt_enable = !!new;
-
- tr.b = b;
- tr.reset = 0;
- tr.old_limit = 0;
-
- smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
-
- return size;
-}
-
-static ssize_t
-store_threshold_limit(struct threshold_block *b, const char *buf, size_t size)
-{
- struct thresh_restart tr;
- unsigned long new;
-
- if (strict_strtoul(buf, 0, &new) < 0)
- return -EINVAL;
-
- if (new > THRESHOLD_MAX)
- new = THRESHOLD_MAX;
- if (new < 1)
- new = 1;
-
- tr.old_limit = b->threshold_limit;
- b->threshold_limit = new;
- tr.b = b;
- tr.reset = 0;
-
- smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
-
- return size;
-}
-
-struct threshold_block_cross_cpu {
- struct threshold_block *tb;
- long retval;
-};
-
-static void local_error_count_handler(void *_tbcc)
-{
- struct threshold_block_cross_cpu *tbcc = _tbcc;
- struct threshold_block *b = tbcc->tb;
- u32 low, high;
-
- rdmsr(b->address, low, high);
- tbcc->retval = (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit);
-}
-
-static ssize_t show_error_count(struct threshold_block *b, char *buf)
-{
- struct threshold_block_cross_cpu tbcc = { .tb = b, };
-
- smp_call_function_single(b->cpu, local_error_count_handler, &tbcc, 1);
- return sprintf(buf, "%lx\n", tbcc.retval);
-}
-
-static ssize_t store_error_count(struct threshold_block *b,
- const char *buf, size_t count)
-{
- struct thresh_restart tr = { .b = b, .reset = 1, .old_limit = 0 };
-
- smp_call_function_single(b->cpu, threshold_restart_bank, &tr, 1);
- return 1;
-}
-
-#define RW_ATTR(val) \
-static struct threshold_attr val = { \
- .attr = {.name = __stringify(val), .mode = 0644 }, \
- .show = show_## val, \
- .store = store_## val, \
-};
-
-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)
-{
- struct threshold_block *b = NULL;
- u32 low, high;
- int err;
-
- if ((bank >= NR_BANKS) || (block >= NR_BLOCKS))
- return 0;
-
- if (rdmsr_safe_on_cpu(cpu, 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;
- }
-
- err = kobject_init_and_add(&b->kobj, &threshold_ktype,
- per_cpu(threshold_banks, cpu)[bank]->kobj,
- "misc%i", block);
- 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;
-
- if (b)
- kobject_uevent(&b->kobj, KOBJ_ADD);
-
- return err;
-
-out_free:
- if (b) {
- kobject_put(&b->kobj);
- kfree(b);
- }
- return err;
-}
-
-static __cpuinit long
-local_allocate_threshold_blocks(int cpu, unsigned int bank)
-{
- return allocate_threshold_blocks(cpu, bank, 0,
- MSR_IA32_MC0_MISC + bank * 4);
-}
-
-/* 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;
- char name[32];
-
- sprintf(name, "threshold_bank%i", bank);
-
-#ifdef CONFIG_SMP
- if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
- i = cpumask_first(cpu_core_mask(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(mce_dev, cpu).kobj,
- b->kobj, name);
- if (err)
- goto out;
-
- cpumask_copy(b->cpus, cpu_core_mask(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;
- }
- if (!alloc_cpumask_var(&b->cpus, GFP_KERNEL)) {
- kfree(b);
- err = -ENOMEM;
- goto out;
- }
-
- b->kobj = kobject_create_and_add(name, &per_cpu(mce_dev, cpu).kobj);
- if (!b->kobj)
- goto out_free;
-
-#ifndef CONFIG_SMP
- cpumask_setall(b->cpus);
-#else
- cpumask_copy(b->cpus, cpu_core_mask(cpu));
-#endif
-
- per_cpu(threshold_banks, cpu)[bank] = b;
-
- err = local_allocate_threshold_blocks(cpu, bank);
- if (err)
- goto out_free;
-
- for_each_cpu(i, b->cpus) {
- if (i == cpu)
- continue;
-
- err = sysfs_create_link(&per_cpu(mce_dev, 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;
- free_cpumask_var(b->cpus);
- 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_put(&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)
-{
- struct threshold_bank *b;
- char name[32];
- int i = 0;
-
- 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(mce_dev, cpu).kobj, name);
- per_cpu(threshold_banks, cpu)[bank] = NULL;
-
- return;
- }
-#endif
-
- /* remove all sibling symlinks before unregistering */
- for_each_cpu(i, b->cpus) {
- if (i == cpu)
- continue;
-
- sysfs_remove_link(&per_cpu(mce_dev, i).kobj, name);
- per_cpu(threshold_banks, i)[bank] = NULL;
- }
-
- deallocate_threshold_block(cpu, bank);
-
-free_out:
- kobject_del(b->kobj);
- kobject_put(b->kobj);
- free_cpumask_var(b->cpus);
- 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 void __cpuinit
-amd_64_threshold_cpu_callback(unsigned long action, unsigned int cpu)
-{
- 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;
- }
-}
-
-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;
- }
- threshold_cpu_callback = amd_64_threshold_cpu_callback;
-
- return 0;
-}
-device_initcall(threshold_init_device);
--- /dev/null
+/*
+ * Intel specific MCE features.
+ * Copyright 2004 Zwane Mwaikambo <zwane@linuxpower.ca>
+ * Copyright (C) 2008, 2009 Intel Corporation
+ * Author: Andi Kleen
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/percpu.h>
+#include <asm/processor.h>
+#include <asm/msr.h>
+#include <asm/mce.h>
+
+/*
+ * Support for Intel Correct Machine Check Interrupts. This allows
+ * the CPU to raise an interrupt when a corrected machine check happened.
+ * Normally we pick those up using a regular polling timer.
+ * Also supports reliable discovery of shared banks.
+ */
+
+static DEFINE_PER_CPU(mce_banks_t, mce_banks_owned);
+
+/*
+ * cmci_discover_lock protects against parallel discovery attempts
+ * which could race against each other.
+ */
+static DEFINE_SPINLOCK(cmci_discover_lock);
+
+#define CMCI_THRESHOLD 1
+
+static int cmci_supported(int *banks)
+{
+ u64 cap;
+
+ if (mce_cmci_disabled || mce_ignore_ce)
+ return 0;
+
+ /*
+ * Vendor check is not strictly needed, but the initial
+ * initialization is vendor keyed and this
+ * makes sure none of the backdoors are entered otherwise.
+ */
+ if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
+ return 0;
+ if (!cpu_has_apic || lapic_get_maxlvt() < 6)
+ return 0;
+ rdmsrl(MSR_IA32_MCG_CAP, cap);
+ *banks = min_t(unsigned, MAX_NR_BANKS, cap & 0xff);
+ return !!(cap & MCG_CMCI_P);
+}
+
+/*
+ * The interrupt handler. This is called on every event.
+ * Just call the poller directly to log any events.
+ * This could in theory increase the threshold under high load,
+ * but doesn't for now.
+ */
+static void intel_threshold_interrupt(void)
+{
+ machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+ mce_notify_irq();
+}
+
+static void print_update(char *type, int *hdr, int num)
+{
+ if (*hdr == 0)
+ printk(KERN_INFO "CPU %d MCA banks", smp_processor_id());
+ *hdr = 1;
+ printk(KERN_CONT " %s:%d", type, num);
+}
+
+/*
+ * Enable CMCI (Corrected Machine Check Interrupt) for available MCE banks
+ * on this CPU. Use the algorithm recommended in the SDM to discover shared
+ * banks.
+ */
+static void cmci_discover(int banks, int boot)
+{
+ unsigned long *owned = (void *)&__get_cpu_var(mce_banks_owned);
+ unsigned long flags;
+ int hdr = 0;
+ int i;
+
+ spin_lock_irqsave(&cmci_discover_lock, flags);
+ for (i = 0; i < banks; i++) {
+ u64 val;
+
+ if (test_bit(i, owned))
+ continue;
+
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+
+ /* Already owned by someone else? */
+ if (val & CMCI_EN) {
+ if (test_and_clear_bit(i, owned) || boot)
+ print_update("SHD", &hdr, i);
+ __clear_bit(i, __get_cpu_var(mce_poll_banks));
+ continue;
+ }
+
+ val |= CMCI_EN | CMCI_THRESHOLD;
+ wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+
+ /* Did the enable bit stick? -- the bank supports CMCI */
+ if (val & CMCI_EN) {
+ if (!test_and_set_bit(i, owned) || boot)
+ print_update("CMCI", &hdr, i);
+ __clear_bit(i, __get_cpu_var(mce_poll_banks));
+ } else {
+ WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
+ }
+ }
+ spin_unlock_irqrestore(&cmci_discover_lock, flags);
+ if (hdr)
+ printk(KERN_CONT "\n");
+}
+
+/*
+ * Just in case we missed an event during initialization check
+ * all the CMCI owned banks.
+ */
+void cmci_recheck(void)
+{
+ unsigned long flags;
+ int banks;
+
+ if (!mce_available(¤t_cpu_data) || !cmci_supported(&banks))
+ return;
+ local_irq_save(flags);
+ machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
+ local_irq_restore(flags);
+}
+
+/*
+ * Disable CMCI on this CPU for all banks it owns when it goes down.
+ * This allows other CPUs to claim the banks on rediscovery.
+ */
+void cmci_clear(void)
+{
+ unsigned long flags;
+ int i;
+ int banks;
+ u64 val;
+
+ if (!cmci_supported(&banks))
+ return;
+ spin_lock_irqsave(&cmci_discover_lock, flags);
+ for (i = 0; i < banks; i++) {
+ if (!test_bit(i, __get_cpu_var(mce_banks_owned)))
+ continue;
+ /* Disable CMCI */
+ rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ val &= ~(CMCI_EN|CMCI_THRESHOLD_MASK);
+ wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
+ __clear_bit(i, __get_cpu_var(mce_banks_owned));
+ }
+ spin_unlock_irqrestore(&cmci_discover_lock, flags);
+}
+
+/*
+ * After a CPU went down cycle through all the others and rediscover
+ * Must run in process context.
+ */
+void cmci_rediscover(int dying)
+{
+ int banks;
+ int cpu;
+ cpumask_var_t old;
+
+ if (!cmci_supported(&banks))
+ return;
+ if (!alloc_cpumask_var(&old, GFP_KERNEL))
+ return;
+ cpumask_copy(old, ¤t->cpus_allowed);
+
+ for_each_online_cpu(cpu) {
+ if (cpu == dying)
+ continue;
+ if (set_cpus_allowed_ptr(current, cpumask_of(cpu)))
+ continue;
+ /* Recheck banks in case CPUs don't all have the same */
+ if (cmci_supported(&banks))
+ cmci_discover(banks, 0);
+ }
+
+ set_cpus_allowed_ptr(current, old);
+ free_cpumask_var(old);
+}
+
+/*
+ * Reenable CMCI on this CPU in case a CPU down failed.
+ */
+void cmci_reenable(void)
+{
+ int banks;
+ if (cmci_supported(&banks))
+ cmci_discover(banks, 0);
+}
+
+static void intel_init_cmci(void)
+{
+ int banks;
+
+ if (!cmci_supported(&banks))
+ return;
+
+ mce_threshold_vector = intel_threshold_interrupt;
+ cmci_discover(banks, 1);
+ /*
+ * For CPU #0 this runs with still disabled APIC, but that's
+ * ok because only the vector is set up. We still do another
+ * check for the banks later for CPU #0 just to make sure
+ * to not miss any events.
+ */
+ apic_write(APIC_LVTCMCI, THRESHOLD_APIC_VECTOR|APIC_DM_FIXED);
+ cmci_recheck();
+}
+
+void mce_intel_feature_init(struct cpuinfo_x86 *c)
+{
+ intel_init_thermal(c);
+ intel_init_cmci();
+}
+++ /dev/null
-/*
- * Intel specific MCE features.
- * Copyright 2004 Zwane Mwaikambo <zwane@linuxpower.ca>
- * Copyright (C) 2008, 2009 Intel Corporation
- * Author: Andi Kleen
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/percpu.h>
-#include <asm/processor.h>
-#include <asm/msr.h>
-#include <asm/mce.h>
-
-/*
- * Support for Intel Correct Machine Check Interrupts. This allows
- * the CPU to raise an interrupt when a corrected machine check happened.
- * Normally we pick those up using a regular polling timer.
- * Also supports reliable discovery of shared banks.
- */
-
-static DEFINE_PER_CPU(mce_banks_t, mce_banks_owned);
-
-/*
- * cmci_discover_lock protects against parallel discovery attempts
- * which could race against each other.
- */
-static DEFINE_SPINLOCK(cmci_discover_lock);
-
-#define CMCI_THRESHOLD 1
-
-static int cmci_supported(int *banks)
-{
- u64 cap;
-
- if (mce_cmci_disabled || mce_ignore_ce)
- return 0;
-
- /*
- * Vendor check is not strictly needed, but the initial
- * initialization is vendor keyed and this
- * makes sure none of the backdoors are entered otherwise.
- */
- if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
- return 0;
- if (!cpu_has_apic || lapic_get_maxlvt() < 6)
- return 0;
- rdmsrl(MSR_IA32_MCG_CAP, cap);
- *banks = min_t(unsigned, MAX_NR_BANKS, cap & 0xff);
- return !!(cap & MCG_CMCI_P);
-}
-
-/*
- * The interrupt handler. This is called on every event.
- * Just call the poller directly to log any events.
- * This could in theory increase the threshold under high load,
- * but doesn't for now.
- */
-static void intel_threshold_interrupt(void)
-{
- machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
- mce_notify_irq();
-}
-
-static void print_update(char *type, int *hdr, int num)
-{
- if (*hdr == 0)
- printk(KERN_INFO "CPU %d MCA banks", smp_processor_id());
- *hdr = 1;
- printk(KERN_CONT " %s:%d", type, num);
-}
-
-/*
- * Enable CMCI (Corrected Machine Check Interrupt) for available MCE banks
- * on this CPU. Use the algorithm recommended in the SDM to discover shared
- * banks.
- */
-static void cmci_discover(int banks, int boot)
-{
- unsigned long *owned = (void *)&__get_cpu_var(mce_banks_owned);
- unsigned long flags;
- int hdr = 0;
- int i;
-
- spin_lock_irqsave(&cmci_discover_lock, flags);
- for (i = 0; i < banks; i++) {
- u64 val;
-
- if (test_bit(i, owned))
- continue;
-
- rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
-
- /* Already owned by someone else? */
- if (val & CMCI_EN) {
- if (test_and_clear_bit(i, owned) || boot)
- print_update("SHD", &hdr, i);
- __clear_bit(i, __get_cpu_var(mce_poll_banks));
- continue;
- }
-
- val |= CMCI_EN | CMCI_THRESHOLD;
- wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
- rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
-
- /* Did the enable bit stick? -- the bank supports CMCI */
- if (val & CMCI_EN) {
- if (!test_and_set_bit(i, owned) || boot)
- print_update("CMCI", &hdr, i);
- __clear_bit(i, __get_cpu_var(mce_poll_banks));
- } else {
- WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
- }
- }
- spin_unlock_irqrestore(&cmci_discover_lock, flags);
- if (hdr)
- printk(KERN_CONT "\n");
-}
-
-/*
- * Just in case we missed an event during initialization check
- * all the CMCI owned banks.
- */
-void cmci_recheck(void)
-{
- unsigned long flags;
- int banks;
-
- if (!mce_available(¤t_cpu_data) || !cmci_supported(&banks))
- return;
- local_irq_save(flags);
- machine_check_poll(MCP_TIMESTAMP, &__get_cpu_var(mce_banks_owned));
- local_irq_restore(flags);
-}
-
-/*
- * Disable CMCI on this CPU for all banks it owns when it goes down.
- * This allows other CPUs to claim the banks on rediscovery.
- */
-void cmci_clear(void)
-{
- unsigned long flags;
- int i;
- int banks;
- u64 val;
-
- if (!cmci_supported(&banks))
- return;
- spin_lock_irqsave(&cmci_discover_lock, flags);
- for (i = 0; i < banks; i++) {
- if (!test_bit(i, __get_cpu_var(mce_banks_owned)))
- continue;
- /* Disable CMCI */
- rdmsrl(MSR_IA32_MC0_CTL2 + i, val);
- val &= ~(CMCI_EN|CMCI_THRESHOLD_MASK);
- wrmsrl(MSR_IA32_MC0_CTL2 + i, val);
- __clear_bit(i, __get_cpu_var(mce_banks_owned));
- }
- spin_unlock_irqrestore(&cmci_discover_lock, flags);
-}
-
-/*
- * After a CPU went down cycle through all the others and rediscover
- * Must run in process context.
- */
-void cmci_rediscover(int dying)
-{
- int banks;
- int cpu;
- cpumask_var_t old;
-
- if (!cmci_supported(&banks))
- return;
- if (!alloc_cpumask_var(&old, GFP_KERNEL))
- return;
- cpumask_copy(old, ¤t->cpus_allowed);
-
- for_each_online_cpu(cpu) {
- if (cpu == dying)
- continue;
- if (set_cpus_allowed_ptr(current, cpumask_of(cpu)))
- continue;
- /* Recheck banks in case CPUs don't all have the same */
- if (cmci_supported(&banks))
- cmci_discover(banks, 0);
- }
-
- set_cpus_allowed_ptr(current, old);
- free_cpumask_var(old);
-}
-
-/*
- * Reenable CMCI on this CPU in case a CPU down failed.
- */
-void cmci_reenable(void)
-{
- int banks;
- if (cmci_supported(&banks))
- cmci_discover(banks, 0);
-}
-
-static void intel_init_cmci(void)
-{
- int banks;
-
- if (!cmci_supported(&banks))
- return;
-
- mce_threshold_vector = intel_threshold_interrupt;
- cmci_discover(banks, 1);
- /*
- * For CPU #0 this runs with still disabled APIC, but that's
- * ok because only the vector is set up. We still do another
- * check for the banks later for CPU #0 just to make sure
- * to not miss any events.
- */
- apic_write(APIC_LVTCMCI, THRESHOLD_APIC_VECTOR|APIC_DM_FIXED);
- cmci_recheck();
-}
-
-void mce_intel_feature_init(struct cpuinfo_x86 *c)
-{
- intel_init_thermal(c);
- intel_init_cmci();
-}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff