x86_64: prepare shared kernel/mce.c

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

1 files changed, 0 insertions, 875 deletions

diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
deleted file mode 100644
index a66d607..0000000
--- a/arch/x86_64/kernel/mce.c
+++ /dev/null
@@ -1,875 +0,0 @@
-/*
- * Machine check handler.
- * K8 parts Copyright 2002,2003 Andi Kleen, SuSE Labs.
- * Rest from unknown author(s). 
- * 2004 Andi Kleen. Rewrote most of it. 
- */
-
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/rcupdate.h>
-#include <linux/kallsyms.h>
-#include <linux/sysdev.h>
-#include <linux/miscdevice.h>
-#include <linux/fs.h>
-#include <linux/capability.h>
-#include <linux/cpu.h>
-#include <linux/percpu.h>
-#include <linux/poll.h>
-#include <linux/thread_info.h>
-#include <linux/ctype.h>
-#include <linux/kmod.h>
-#include <linux/kdebug.h>
-#include <asm/processor.h> 
-#include <asm/msr.h>
-#include <asm/mce.h>
-#include <asm/uaccess.h>
-#include <asm/smp.h>
-#include <asm/idle.h>
-
-#define MISC_MCELOG_MINOR 227
-#define NR_BANKS 6
-
-atomic_t mce_entry;
-
-static int mce_dont_init;
-
-/*
- * Tolerant levels:
- *   0: always panic on uncorrected errors, log corrected errors
- *   1: panic or SIGBUS on uncorrected errors, log corrected errors
- *   2: SIGBUS or log uncorrected errors (if possible), log corrected errors
- *   3: never panic or SIGBUS, log all errors (for testing only)
- */
-static int tolerant = 1;
-static int banks;
-static unsigned long bank[NR_BANKS] = { [0 ... NR_BANKS-1] = ~0UL };
-static unsigned long notify_user;
-static int rip_msr;
-static int mce_bootlog = 1;
-static atomic_t mce_events;
-
-static char trigger[128];
-static char *trigger_argv[2] = { trigger, NULL };
-
-static DECLARE_WAIT_QUEUE_HEAD(mce_wait);
-
-/*
- * Lockless MCE logging infrastructure.
- * This avoids deadlocks on printk locks without having to break locks. Also
- * separate MCEs from kernel messages to avoid bogus bug reports.
- */
-
-struct mce_log mcelog = { 
-	MCE_LOG_SIGNATURE,
-	MCE_LOG_LEN,
-}; 
-
-void mce_log(struct mce *mce)
-{
-	unsigned next, entry;
-	atomic_inc(&mce_events);
-	mce->finished = 0;
-	wmb();
-	for (;;) {
-		entry = rcu_dereference(mcelog.next);
-		/* The rmb forces the compiler to reload next in each
-		    iteration */
-		rmb();
-		for (;;) {
-			/* When the buffer fills up discard new entries. Assume
-			   that the earlier errors are the more interesting. */
-			if (entry >= MCE_LOG_LEN) {
-				set_bit(MCE_OVERFLOW, &mcelog.flags);
-				return;
-			}
-			/* Old left over entry. Skip. */
-			if (mcelog.entry[entry].finished) {
-				entry++;
-				continue;
-			}
-			break;
-		}
-		smp_rmb();
-		next = entry + 1;
-		if (cmpxchg(&mcelog.next, entry, next) == entry)
-			break;
-	}
-	memcpy(mcelog.entry + entry, mce, sizeof(struct mce));
-	wmb();
-	mcelog.entry[entry].finished = 1;
-	wmb();
-
-	set_bit(0, &notify_user);
-}
-
-static void print_mce(struct mce *m)
-{
-	printk(KERN_EMERG "\n"
-	       KERN_EMERG "HARDWARE ERROR\n"
-	       KERN_EMERG
-	       "CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
-	       m->cpu, m->mcgstatus, m->bank, m->status);
-	if (m->rip) {
-		printk(KERN_EMERG 
-		       "RIP%s %02x:<%016Lx> ",
-		       !(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
-		       m->cs, m->rip);
-		if (m->cs == __KERNEL_CS)
-			print_symbol("{%s}", m->rip);
-		printk("\n");
-	}
-	printk(KERN_EMERG "TSC %Lx ", m->tsc); 
-	if (m->addr)
-		printk("ADDR %Lx ", m->addr);
-	if (m->misc)
-		printk("MISC %Lx ", m->misc); 	
-	printk("\n");
-	printk(KERN_EMERG "This is not a software problem!\n");
-        printk(KERN_EMERG
-    "Run through mcelog --ascii to decode and contact your hardware vendor\n");
-}
-
-static void mce_panic(char *msg, struct mce *backup, unsigned long start)
-{ 
-	int i;
-
-	oops_begin();
-	for (i = 0; i < MCE_LOG_LEN; i++) {
-		unsigned long tsc = mcelog.entry[i].tsc;
-		if (time_before(tsc, start))
-			continue;
-		print_mce(&mcelog.entry[i]); 
-		if (backup && mcelog.entry[i].tsc == backup->tsc)
-			backup = NULL;
-	}
-	if (backup)
-		print_mce(backup);
-	panic(msg);
-} 
-
-static int mce_available(struct cpuinfo_x86 *c)
-{
-	return cpu_has(c, X86_FEATURE_MCE) && cpu_has(c, X86_FEATURE_MCA);
-}
-
-static inline void mce_get_rip(struct mce *m, struct pt_regs *regs)
-{
-	if (regs && (m->mcgstatus & MCG_STATUS_RIPV)) {
-		m->rip = regs->rip;
-		m->cs = regs->cs;
-	} else {
-		m->rip = 0;
-		m->cs = 0;
-	}
-	if (rip_msr) {
-		/* Assume the RIP in the MSR is exact. Is this true? */
-		m->mcgstatus |= MCG_STATUS_EIPV;
-		rdmsrl(rip_msr, m->rip);
-		m->cs = 0;
-	}
-}
-
-/* 
- * The actual machine check handler
- */
-
-void do_machine_check(struct pt_regs * regs, long error_code)
-{
-	struct mce m, panicm;
-	u64 mcestart = 0;
-	int i;
-	int panicm_found = 0;
-	/*
-	 * If no_way_out gets set, there is no safe way to recover from this
-	 * MCE.  If tolerant is cranked up, we'll try anyway.
-	 */
-	int no_way_out = 0;
-	/*
-	 * If kill_it gets set, there might be a way to recover from this
-	 * error.
-	 */
-	int kill_it = 0;
-
-	atomic_inc(&mce_entry);
-
-	if (regs)
-		notify_die(DIE_NMI, "machine check", regs, error_code, 18, SIGKILL);
-	if (!banks)
-		goto out2;
-
-	memset(&m, 0, sizeof(struct mce));
-	m.cpu = smp_processor_id();
-	rdmsrl(MSR_IA32_MCG_STATUS, m.mcgstatus);
-	/* if the restart IP is not valid, we're done for */
-	if (!(m.mcgstatus & MCG_STATUS_RIPV))
-		no_way_out = 1;
-	
-	rdtscll(mcestart);
-	barrier();
-
-	for (i = 0; i < banks; i++) {
-		if (!bank[i])
-			continue;
-		
-		m.misc = 0; 
-		m.addr = 0;
-		m.bank = i;
-		m.tsc = 0;
-
-		rdmsrl(MSR_IA32_MC0_STATUS + i*4, m.status);
-		if ((m.status & MCI_STATUS_VAL) == 0)
-			continue;
-
-		if (m.status & MCI_STATUS_EN) {
-			/* if PCC was set, there's no way out */
-			no_way_out |= !!(m.status & MCI_STATUS_PCC);
-			/*
-			 * If this error was uncorrectable and there was
-			 * an overflow, we're in trouble.  If no overflow,
-			 * we might get away with just killing a task.
-			 */
-			if (m.status & MCI_STATUS_UC) {
-				if (tolerant < 1 || m.status & MCI_STATUS_OVER)
-					no_way_out = 1;
-				kill_it = 1;
-			}
-		}
-
-		if (m.status & MCI_STATUS_MISCV)
-			rdmsrl(MSR_IA32_MC0_MISC + i*4, m.misc);
-		if (m.status & MCI_STATUS_ADDRV)
-			rdmsrl(MSR_IA32_MC0_ADDR + i*4, m.addr);
-
-		mce_get_rip(&m, regs);
-		if (error_code >= 0)
-			rdtscll(m.tsc);
-		if (error_code != -2)
-			mce_log(&m);
-
-		/* Did this bank cause the exception? */
-		/* Assume that the bank with uncorrectable errors did it,
-		   and that there is only a single one. */
-		if ((m.status & MCI_STATUS_UC) && (m.status & MCI_STATUS_EN)) {
-			panicm = m;
-			panicm_found = 1;
-		}
-
-		add_taint(TAINT_MACHINE_CHECK);
-	}
-
-	/* Never do anything final in the polling timer */
-	if (!regs)
-		goto out;
-
-	/* If we didn't find an uncorrectable error, pick
-	   the last one (shouldn't happen, just being safe). */
-	if (!panicm_found)
-		panicm = m;
-
-	/*
-	 * If we have decided that we just CAN'T continue, and the user
-	 *  has not set tolerant to an insane level, give up and die.
-	 */
-	if (no_way_out && tolerant < 3)
-		mce_panic("Machine check", &panicm, mcestart);
-
-	/*
-	 * If the error seems to be unrecoverable, something should be
-	 * done.  Try to kill as little as possible.  If we can kill just
-	 * one task, do that.  If the user has set the tolerance very
-	 * high, don't try to do anything at all.
-	 */
-	if (kill_it && tolerant < 3) {
-		int user_space = 0;
-
-		/*
-		 * If the EIPV bit is set, it means the saved IP is the
-		 * instruction which caused the MCE.
-		 */
-		if (m.mcgstatus & MCG_STATUS_EIPV)
-			user_space = panicm.rip && (panicm.cs & 3);
-
-		/*
-		 * If we know that the error was in user space, send a
-		 * SIGBUS.  Otherwise, panic if tolerance is low.
-		 *
-		 * do_exit() takes an awful lot of locks and has a slight
-		 * risk of deadlocking.
-		 */
-		if (user_space) {
-			do_exit(SIGBUS);
-		} else if (panic_on_oops || tolerant < 2) {
-			mce_panic("Uncorrected machine check",
-				&panicm, mcestart);
-		}
-	}
-
-	/* notify userspace ASAP */
-	set_thread_flag(TIF_MCE_NOTIFY);
-
- out:
-	/* the last thing we do is clear state */
-	for (i = 0; i < banks; i++)
-		wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
-	wrmsrl(MSR_IA32_MCG_STATUS, 0);
- out2:
-	atomic_dec(&mce_entry);
-}
-
-#ifdef CONFIG_X86_MCE_INTEL
-/***
- * mce_log_therm_throt_event - Logs the thermal throttling event to mcelog
- * @cpu: The CPU on which the event occured.
- * @status: Event status information
- *
- * This function should be called by the thermal interrupt after the
- * event has been processed and the decision was made to log the event
- * further.
- *
- * The status parameter will be saved to the 'status' field of 'struct mce'
- * and historically has been the register value of the
- * MSR_IA32_THERMAL_STATUS (Intel) msr.
- */
-void mce_log_therm_throt_event(unsigned int cpu, __u64 status)
-{
-	struct mce m;
-
-	memset(&m, 0, sizeof(m));
-	m.cpu = cpu;
-	m.bank = MCE_THERMAL_BANK;
-	m.status = status;
-	rdtscll(m.tsc);
-	mce_log(&m);
-}
-#endif /* CONFIG_X86_MCE_INTEL */
-
-/*
- * Periodic polling timer for "silent" machine check errors.  If the
- * poller finds an MCE, poll 2x faster.  When the poller finds no more
- * errors, poll 2x slower (up to check_interval seconds).
- */
-
-static int check_interval = 5 * 60; /* 5 minutes */
-static int next_interval; /* in jiffies */
-static void mcheck_timer(struct work_struct *work);
-static DECLARE_DELAYED_WORK(mcheck_work, mcheck_timer);
-
-static void mcheck_check_cpu(void *info)
-{
-	if (mce_available(&current_cpu_data))
-		do_machine_check(NULL, 0);
-}
-
-static void mcheck_timer(struct work_struct *work)
-{
-	on_each_cpu(mcheck_check_cpu, NULL, 1, 1);
-
-	/*
-	 * Alert userspace if needed.  If we logged an MCE, reduce the
-	 * polling interval, otherwise increase the polling interval.
-	 */
-	if (mce_notify_user()) {
-		next_interval = max(next_interval/2, HZ/100);
-	} else {
-		next_interval = min(next_interval*2,
-				(int)round_jiffies_relative(check_interval*HZ));
-	}
-
-	schedule_delayed_work(&mcheck_work, next_interval);
-}
-
-/*
- * This is only called from process context.  This is where we do
- * anything we need to alert userspace about new MCEs.  This is called
- * directly from the poller and also from entry.S and idle, thanks to
- * TIF_MCE_NOTIFY.
- */
-int mce_notify_user(void)
-{
-	clear_thread_flag(TIF_MCE_NOTIFY);
-	if (test_and_clear_bit(0, &notify_user)) {
-		static unsigned long last_print;
-		unsigned long now = jiffies;
-
-		wake_up_interruptible(&mce_wait);
-		if (trigger[0])
-			call_usermodehelper(trigger, trigger_argv, NULL,
-						UMH_NO_WAIT);
-
-		if (time_after_eq(now, last_print + (check_interval*HZ))) {
-			last_print = now;
-			printk(KERN_INFO "Machine check events logged\n");
-		}
-
-		return 1;
-	}
-	return 0;
-}
-
-/* see if the idle task needs to notify userspace */
-static int
-mce_idle_callback(struct notifier_block *nfb, unsigned long action, void *junk)
-{
-	/* IDLE_END should be safe - interrupts are back on */
-	if (action == IDLE_END && test_thread_flag(TIF_MCE_NOTIFY))
-		mce_notify_user();
-
-	return NOTIFY_OK;
-}
-
-static struct notifier_block mce_idle_notifier = {
-	.notifier_call = mce_idle_callback,
-};
-
-static __init int periodic_mcheck_init(void)
-{ 
-	next_interval = check_interval * HZ;
-	if (next_interval)
-		schedule_delayed_work(&mcheck_work,
-				      round_jiffies_relative(next_interval));
-	idle_notifier_register(&mce_idle_notifier);
-	return 0;
-} 
-__initcall(periodic_mcheck_init);
-
-
-/* 
- * Initialize Machine Checks for a CPU.
- */
-static void mce_init(void *dummy)
-{
-	u64 cap;
-	int i;
-
-	rdmsrl(MSR_IA32_MCG_CAP, cap);
-	banks = cap & 0xff;
-	if (banks > NR_BANKS) { 
-		printk(KERN_INFO "MCE: warning: using only %d banks\n", banks);
-		banks = NR_BANKS; 
-	}
-	/* Use accurate RIP reporting if available. */
-	if ((cap & (1<<9)) && ((cap >> 16) & 0xff) >= 9)
-		rip_msr = MSR_IA32_MCG_EIP;
-
-	/* Log the machine checks left over from the previous reset.
-	   This also clears all registers */
-	do_machine_check(NULL, mce_bootlog ? -1 : -2);
-
-	set_in_cr4(X86_CR4_MCE);
-
-	if (cap & MCG_CTL_P)
-		wrmsr(MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
-
-	for (i = 0; i < banks; i++) {
-		wrmsrl(MSR_IA32_MC0_CTL+4*i, bank[i]);
-		wrmsrl(MSR_IA32_MC0_STATUS+4*i, 0);
-	}	
-}
-
-/* Add per CPU specific workarounds here */
-static void __cpuinit mce_cpu_quirks(struct cpuinfo_x86 *c)
-{ 
-	/* This should be disabled by the BIOS, but isn't always */
-	if (c->x86_vendor == X86_VENDOR_AMD && c->x86 == 15) {
-		/* disable GART TBL walk error reporting, which trips off 
-		   incorrectly with the IOMMU & 3ware & Cerberus. */
-		clear_bit(10, &bank[4]);
-		/* Lots of broken BIOS around that don't clear them
-		   by default and leave crap in there. Don't log. */
-		mce_bootlog = 0;
-	}
-
-}			
-
-static void __cpuinit mce_cpu_features(struct cpuinfo_x86 *c)
-{
-	switch (c->x86_vendor) {
-	case X86_VENDOR_INTEL:
-		mce_intel_feature_init(c);
-		break;
-	case X86_VENDOR_AMD:
-		mce_amd_feature_init(c);
-		break;
-	default:
-		break;
-	}
-}
-
-/* 
- * Called for each booted CPU to set up machine checks.
- * Must be called with preempt off. 
- */
-void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
-{
-	static cpumask_t mce_cpus = CPU_MASK_NONE;
-
-	mce_cpu_quirks(c); 
-
-	if (mce_dont_init ||
-	    cpu_test_and_set(smp_processor_id(), mce_cpus) ||
-	    !mce_available(c))
-		return;
-
-	mce_init(NULL);
-	mce_cpu_features(c);
-}
-
-/*
- * Character device to read and clear the MCE log.
- */
-
-static DEFINE_SPINLOCK(mce_state_lock);
-static int open_count;	/* #times opened */
-static int open_exclu;	/* already open exclusive? */
-
-static int mce_open(struct inode *inode, struct file *file)
-{
-	spin_lock(&mce_state_lock);
-
-	if (open_exclu || (open_count && (file->f_flags & O_EXCL))) {
-		spin_unlock(&mce_state_lock);
-		return -EBUSY;
-	}
-
-	if (file->f_flags & O_EXCL)
-		open_exclu = 1;
-	open_count++;
-
-	spin_unlock(&mce_state_lock);
-
-	return nonseekable_open(inode, file);
-}
-
-static int mce_release(struct inode *inode, struct file *file)
-{
-	spin_lock(&mce_state_lock);
-
-	open_count--;
-	open_exclu = 0;
-
-	spin_unlock(&mce_state_lock);
-
-	return 0;
-}
-
-static void collect_tscs(void *data) 
-{ 
-	unsigned long *cpu_tsc = (unsigned long *)data;
-	rdtscll(cpu_tsc[smp_processor_id()]);
-} 
-
-static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize, loff_t *off)
-{
-	unsigned long *cpu_tsc;
-	static DECLARE_MUTEX(mce_read_sem);
-	unsigned next;
-	char __user *buf = ubuf;
-	int i, err;
-
-	cpu_tsc = kmalloc(NR_CPUS * sizeof(long), GFP_KERNEL);
-	if (!cpu_tsc)
-		return -ENOMEM;
-
-	down(&mce_read_sem); 
-	next = rcu_dereference(mcelog.next);
-
-	/* Only supports full reads right now */
-	if (*off != 0 || usize < MCE_LOG_LEN*sizeof(struct mce)) { 
-		up(&mce_read_sem);
-		kfree(cpu_tsc);
-		return -EINVAL;
-	}
-
-	err = 0;
-	for (i = 0; i < next; i++) {		
-		unsigned long start = jiffies;
-		while (!mcelog.entry[i].finished) {
-			if (time_after_eq(jiffies, start + 2)) {
-				memset(mcelog.entry + i,0, sizeof(struct mce));
-				goto timeout;
-			}
-			cpu_relax();
-		}
-		smp_rmb();
-		err |= copy_to_user(buf, mcelog.entry + i, sizeof(struct mce));
-		buf += sizeof(struct mce); 
- timeout:
-		;
-	} 
-
-	memset(mcelog.entry, 0, next * sizeof(struct mce));
-	mcelog.next = 0;
-
-	synchronize_sched();
-
-	/* Collect entries that were still getting written before the synchronize. */
-
-	on_each_cpu(collect_tscs, cpu_tsc, 1, 1);
-	for (i = next; i < MCE_LOG_LEN; i++) { 
-		if (mcelog.entry[i].finished && 
-		    mcelog.entry[i].tsc < cpu_tsc[mcelog.entry[i].cpu]) {  
-			err |= copy_to_user(buf, mcelog.entry+i, sizeof(struct mce));
-			smp_rmb();
-			buf += sizeof(struct mce);
-			memset(&mcelog.entry[i], 0, sizeof(struct mce));
-		}
-	} 	
-	up(&mce_read_sem);
-	kfree(cpu_tsc);
-	return err ? -EFAULT : buf - ubuf; 
-}
-
-static unsigned int mce_poll(struct file *file, poll_table *wait)
-{
-	poll_wait(file, &mce_wait, wait);
-	if (rcu_dereference(mcelog.next))
-		return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-static int mce_ioctl(struct inode *i, struct file *f,unsigned int cmd, unsigned long arg)
-{
-	int __user *p = (int __user *)arg;
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM; 
-	switch (cmd) {
-	case MCE_GET_RECORD_LEN: 
-		return put_user(sizeof(struct mce), p);
-	case MCE_GET_LOG_LEN:
-		return put_user(MCE_LOG_LEN, p);		
-	case MCE_GETCLEAR_FLAGS: {
-		unsigned flags;
-		do { 
-			flags = mcelog.flags;
-		} while (cmpxchg(&mcelog.flags, flags, 0) != flags); 
-		return put_user(flags, p); 
-	}
-	default:
-		return -ENOTTY; 
-	} 
-}
-
-static const struct file_operations mce_chrdev_ops = {
-	.open = mce_open,
-	.release = mce_release,
-	.read = mce_read,
-	.poll = mce_poll,
-	.ioctl = mce_ioctl,
-};
-
-static struct miscdevice mce_log_device = {
-	MISC_MCELOG_MINOR,
-	"mcelog",
-	&mce_chrdev_ops,
-};
-
-static unsigned long old_cr4 __initdata;
-
-void __init stop_mce(void)
-{
-	old_cr4 = read_cr4();
-	clear_in_cr4(X86_CR4_MCE);
-}
-
-void __init restart_mce(void)
-{
-	if (old_cr4 & X86_CR4_MCE)
-		set_in_cr4(X86_CR4_MCE);
-}
-
-/* 
- * Old style boot options parsing. Only for compatibility. 
- */
-
-static int __init mcheck_disable(char *str)
-{
-	mce_dont_init = 1;
-	return 1;
-}
-
-/* mce=off disables machine check. Note you can reenable it later
-   using sysfs.
-   mce=TOLERANCELEVEL (number, see above)
-   mce=bootlog Log MCEs from before booting. Disabled by default on AMD.
-   mce=nobootlog Don't log MCEs from before booting. */
-static int __init mcheck_enable(char *str)
-{
-	if (*str == '=')
-		str++;
-	if (!strcmp(str, "off"))
-		mce_dont_init = 1;
-	else if (!strcmp(str, "bootlog") || !strcmp(str,"nobootlog"))
-		mce_bootlog = str[0] == 'b';
-	else if (isdigit(str[0]))
-		get_option(&str, &tolerant);
-	else
-		printk("mce= argument %s ignored. Please use /sys", str); 
-	return 1;
-}
-
-__setup("nomce", mcheck_disable);
-__setup("mce", mcheck_enable);
-
-/* 
- * Sysfs support
- */ 
-
-/* On resume clear all MCE state. Don't want to see leftovers from the BIOS.
-   Only one CPU is active at this time, the others get readded later using
-   CPU hotplug. */
-static int mce_resume(struct sys_device *dev)
-{
-	mce_init(NULL);
-	return 0;
-}
-
-/* Reinit MCEs after user configuration changes */
-static void mce_restart(void) 
-{ 
-	if (next_interval)
-		cancel_delayed_work(&mcheck_work);
-	/* Timer race is harmless here */
-	on_each_cpu(mce_init, NULL, 1, 1);       
-	next_interval = check_interval * HZ;
-	if (next_interval)
-		schedule_delayed_work(&mcheck_work,
-				      round_jiffies_relative(next_interval));
-}
-
-static struct sysdev_class mce_sysclass = {
-	.resume = mce_resume,
-	set_kset_name("machinecheck"),
-};
-
-DEFINE_PER_CPU(struct sys_device, device_mce);
-
-/* Why are there no generic functions for this? */
-#define ACCESSOR(name, var, start) \
-	static ssize_t show_ ## name(struct sys_device *s, char *buf) { 	   	   \
-		return sprintf(buf, "%lx\n", (unsigned long)var);		   \
-	} 									   \
-	static ssize_t set_ ## name(struct sys_device *s,const char *buf,size_t siz) { \
-		char *end; 							   \
-		unsigned long new = simple_strtoul(buf, &end, 0); 		   \
-		if (end == buf) return -EINVAL;					   \
-		var = new;							   \
-		start; 								   \
-		return end-buf;		     					   \
-	}									   \
-	static SYSDEV_ATTR(name, 0644, show_ ## name, set_ ## name);
-
-/* TBD should generate these dynamically based on number of available banks */
-ACCESSOR(bank0ctl,bank[0],mce_restart())
-ACCESSOR(bank1ctl,bank[1],mce_restart())
-ACCESSOR(bank2ctl,bank[2],mce_restart())
-ACCESSOR(bank3ctl,bank[3],mce_restart())
-ACCESSOR(bank4ctl,bank[4],mce_restart())
-ACCESSOR(bank5ctl,bank[5],mce_restart())
-
-static ssize_t show_trigger(struct sys_device *s, char *buf)
-{
-	strcpy(buf, trigger);
-	strcat(buf, "\n");
-	return strlen(trigger) + 1;
-}
-
-static ssize_t set_trigger(struct sys_device *s,const char *buf,size_t siz)
-{
-	char *p;
-	int len;
-	strncpy(trigger, buf, sizeof(trigger));
-	trigger[sizeof(trigger)-1] = 0;
-	len = strlen(trigger);
-	p = strchr(trigger, '\n');
-	if (*p) *p = 0;
-	return len;
-}
-
-static SYSDEV_ATTR(trigger, 0644, show_trigger, set_trigger);
-ACCESSOR(tolerant,tolerant,)
-ACCESSOR(check_interval,check_interval,mce_restart())
-static struct sysdev_attribute *mce_attributes[] = {
-	&attr_bank0ctl, &attr_bank1ctl, &attr_bank2ctl,
-	&attr_bank3ctl, &attr_bank4ctl, &attr_bank5ctl,
-	&attr_tolerant, &attr_check_interval, &attr_trigger,
-	NULL
-};
-
-/* Per cpu sysdev init.  All of the cpus still share the same ctl bank */
-static __cpuinit int mce_create_device(unsigned int cpu)
-{
-	int err;
-	int i;
-	if (!mce_available(&cpu_data[cpu]))
-		return -EIO;
-
-	per_cpu(device_mce,cpu).id = cpu;
-	per_cpu(device_mce,cpu).cls = &mce_sysclass;
-
-	err = sysdev_register(&per_cpu(device_mce,cpu));
-
-	if (!err) {
-		for (i = 0; mce_attributes[i]; i++)
-			sysdev_create_file(&per_cpu(device_mce,cpu),
-				mce_attributes[i]);
-	}
-	return err;
-}
-
-static void mce_remove_device(unsigned int cpu)
-{
-	int i;
-
-	for (i = 0; mce_attributes[i]; i++)
-		sysdev_remove_file(&per_cpu(device_mce,cpu),
-			mce_attributes[i]);
-	sysdev_unregister(&per_cpu(device_mce,cpu));
-	memset(&per_cpu(device_mce, cpu).kobj, 0, sizeof(struct kobject));
-}
-
-/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-static int
-mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
-{
-	unsigned int cpu = (unsigned long)hcpu;
-
-	switch (action) {
-	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
-		mce_create_device(cpu);
-		break;
-	case CPU_DEAD:
-	case CPU_DEAD_FROZEN:
-		mce_remove_device(cpu);
-		break;
-	}
-	return NOTIFY_OK;
-}
-
-static struct notifier_block mce_cpu_notifier = {
-	.notifier_call = mce_cpu_callback,
-};
-
-static __init int mce_init_device(void)
-{
-	int err;
-	int i = 0;
-
-	if (!mce_available(&boot_cpu_data))
-		return -EIO;
-	err = sysdev_class_register(&mce_sysclass);
-
-	for_each_online_cpu(i) {
-		mce_create_device(i);
-	}
-
-	register_hotcpu_notifier(&mce_cpu_notifier);
-	misc_register(&mce_log_device);
-	return err;
-}
-
-device_initcall(mce_init_device);