x86_64: prepare shared kernel/mce_amd.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 689 deletions

diff --git a/arch/x86_64/kernel/mce_amd.c b/arch/x86_64/kernel/mce_amd.c
deleted file mode 100644
index 2f8a7f1..0000000
--- a/arch/x86_64/kernel/mce_amd.c
+++ /dev/null
@@ -1,689 +0,0 @@
-/*
- *  (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);