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Rework all config variables used throughout the MCA code and collect 

them together into a mca_config struct. This keeps them tightly and
 neatly packed together instead of spilled all over the place.
 
 Then, convert those which are used as booleans into real booleans and
 save some space.
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Merge tag 'mca_cfg' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras into x86/ras

Pull x86 RAS changes from Borislav Petkov:

 "Rework all config variables used throughout the MCA code and collect
  them together into a mca_config struct. This keeps them tightly and
  neatly packed together instead of spilled all over the place.

  Then, convert those which are used as booleans into real booleans and
  save some space."

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2012-10-26 14:50:17 +02:00
parent 2ab3f29ddd 1462594bf2
commit 003db633d6
8 changed files with 158 additions and 114 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
arch/x86/include/asm/mce.h
View File

@ -119,6 +119,23 @@ struct mce_log {
#define K8_MCE_THRESHOLD_BASE (MCE_EXTENDED_BANK + 1) #define K8_MCE_THRESHOLD_BASE (MCE_EXTENDED_BANK + 1)
#ifdef __KERNEL__ #ifdef __KERNEL__
struct mca_config {
bool dont_log_ce;
bool cmci_disabled;
bool ignore_ce;
bool disabled;
bool ser;
bool bios_cmci_threshold;
u8 banks;
s8 bootlog;
int tolerant;
int monarch_timeout;
int panic_timeout;
u32 rip_msr;
};
extern struct mca_config mca_cfg;
extern void mce_register_decode_chain(struct notifier_block *nb); extern void mce_register_decode_chain(struct notifier_block *nb);
extern void mce_unregister_decode_chain(struct notifier_block *nb); extern void mce_unregister_decode_chain(struct notifier_block *nb);
@ -126,7 +143,6 @@ extern void mce_unregister_decode_chain(struct notifier_block *nb);
#include <linux/init.h> #include <linux/init.h>
#include <linux/atomic.h> #include <linux/atomic.h>
extern int mce_disabled;
extern int mce_p5_enabled; extern int mce_p5_enabled;
#ifdef CONFIG_X86_MCE #ifdef CONFIG_X86_MCE
@ -159,9 +175,6 @@ DECLARE_PER_CPU(struct device *, mce_device);
#define MAX_NR_BANKS 32 #define MAX_NR_BANKS 32
#ifdef CONFIG_X86_MCE_INTEL #ifdef CONFIG_X86_MCE_INTEL
extern int mce_cmci_disabled;
extern int mce_ignore_ce;
extern int mce_bios_cmci_threshold;
void mce_intel_feature_init(struct cpuinfo_x86 *c); void mce_intel_feature_init(struct cpuinfo_x86 *c);
void cmci_clear(void); void cmci_clear(void);
void cmci_reenable(void); void cmci_reenable(void);

2
arch/x86/kernel/cpu/mcheck/mce-internal.h
View File

@ -24,8 +24,6 @@ struct mce_bank {
int mce_severity(struct mce *a, int tolerant, char **msg); int mce_severity(struct mce *a, int tolerant, char **msg);
struct dentry *mce_get_debugfs_dir(void); struct dentry *mce_get_debugfs_dir(void);
extern int mce_ser;
extern struct mce_bank *mce_banks; extern struct mce_bank *mce_banks;
#ifdef CONFIG_X86_MCE_INTEL #ifdef CONFIG_X86_MCE_INTEL

4
arch/x86/kernel/cpu/mcheck/mce-severity.c
View File

@ -193,9 +193,9 @@ int mce_severity(struct mce *m, int tolerant, char **msg)
continue; continue;
if ((m->mcgstatus & s->mcgmask) != s->mcgres) if ((m->mcgstatus & s->mcgmask) != s->mcgres)
continue; continue;
if (s->ser == SER_REQUIRED && !mce_ser) if (s->ser == SER_REQUIRED && !mca_cfg.ser)
continue; continue;
if (s->ser == NO_SER && mce_ser) if (s->ser == NO_SER && mca_cfg.ser)
continue; continue;
if (s->context && ctx != s->context) if (s->context && ctx != s->context)
continue; continue;

207
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -58,34 +58,26 @@ static DEFINE_MUTEX(mce_chrdev_read_mutex);
#define CREATE_TRACE_POINTS #define CREATE_TRACE_POINTS
#include <trace/events/mce.h> #include <trace/events/mce.h>
int mce_disabled __read_mostly;
#define SPINUNIT 100 /* 100ns */ #define SPINUNIT 100 /* 100ns */
atomic_t mce_entry; atomic_t mce_entry;
DEFINE_PER_CPU(unsigned, mce_exception_count); DEFINE_PER_CPU(unsigned, mce_exception_count);
/* struct mce_bank *mce_banks __read_mostly;
* 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 __read_mostly = 1;
static int banks __read_mostly;
static int rip_msr __read_mostly;
static int mce_bootlog __read_mostly = -1;
static int monarch_timeout __read_mostly = -1;
static int mce_panic_timeout __read_mostly;
static int mce_dont_log_ce __read_mostly;
int mce_cmci_disabled __read_mostly;
int mce_ignore_ce __read_mostly;
int mce_ser __read_mostly;
int mce_bios_cmci_threshold __read_mostly;
struct mce_bank *mce_banks __read_mostly; struct mca_config mca_cfg __read_mostly = {
.bootlog = -1,
/*
* 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 corr. errors
* 3: never panic or SIGBUS, log all errors (for testing only)
*/
.tolerant = 1,
.monarch_timeout = -1
};
/* User mode helper program triggered by machine check event */ /* User mode helper program triggered by machine check event */
static unsigned long mce_need_notify; static unsigned long mce_need_notify;
@ -302,7 +294,7 @@ static void wait_for_panic(void)
while (timeout-- > 0) while (timeout-- > 0)
udelay(1); udelay(1);
if (panic_timeout == 0) if (panic_timeout == 0)
panic_timeout = mce_panic_timeout; panic_timeout = mca_cfg.panic_timeout;
panic("Panicing machine check CPU died"); panic("Panicing machine check CPU died");
} }
@ -360,7 +352,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
pr_emerg(HW_ERR "Machine check: %s\n", exp); pr_emerg(HW_ERR "Machine check: %s\n", exp);
if (!fake_panic) { if (!fake_panic) {
if (panic_timeout == 0) if (panic_timeout == 0)
panic_timeout = mce_panic_timeout; panic_timeout = mca_cfg.panic_timeout;
panic(msg); panic(msg);
} else } else
pr_emerg(HW_ERR "Fake kernel panic: %s\n", msg); pr_emerg(HW_ERR "Fake kernel panic: %s\n", msg);
@ -372,7 +364,7 @@ static int msr_to_offset(u32 msr)
{ {
unsigned bank = __this_cpu_read(injectm.bank); unsigned bank = __this_cpu_read(injectm.bank);
if (msr == rip_msr) if (msr == mca_cfg.rip_msr)
return offsetof(struct mce, ip); return offsetof(struct mce, ip);
if (msr == MSR_IA32_MCx_STATUS(bank)) if (msr == MSR_IA32_MCx_STATUS(bank))
return offsetof(struct mce, status); return offsetof(struct mce, status);
@ -451,8 +443,8 @@ static inline void mce_gather_info(struct mce *m, struct pt_regs *regs)
m->cs |= 3; m->cs |= 3;
} }
/* Use accurate RIP reporting if available. */ /* Use accurate RIP reporting if available. */
if (rip_msr) if (mca_cfg.rip_msr)
m->ip = mce_rdmsrl(rip_msr); m->ip = mce_rdmsrl(mca_cfg.rip_msr);
} }
} }
@ -513,7 +505,7 @@ static int mce_ring_add(unsigned long pfn)
int mce_available(struct cpuinfo_x86 *c) int mce_available(struct cpuinfo_x86 *c)
{ {
if (mce_disabled) if (mca_cfg.disabled)
return 0; return 0;
return cpu_has(c, X86_FEATURE_MCE) && cpu_has(c, X86_FEATURE_MCA); return cpu_has(c, X86_FEATURE_MCE) && cpu_has(c, X86_FEATURE_MCA);
} }
@ -565,7 +557,7 @@ static void mce_read_aux(struct mce *m, int i)
/* /*
* Mask the reported address by the reported granularity. * Mask the reported address by the reported granularity.
*/ */
if (mce_ser && (m->status & MCI_STATUS_MISCV)) { if (mca_cfg.ser && (m->status & MCI_STATUS_MISCV)) {
u8 shift = MCI_MISC_ADDR_LSB(m->misc); u8 shift = MCI_MISC_ADDR_LSB(m->misc);
m->addr >>= shift; m->addr >>= shift;
m->addr <<= shift; m->addr <<= shift;
@ -599,7 +591,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
mce_gather_info(&m, NULL); mce_gather_info(&m, NULL);
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
if (!mce_banks[i].ctl || !test_bit(i, *b)) if (!mce_banks[i].ctl || !test_bit(i, *b))
continue; continue;
@ -620,7 +612,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
* TBD do the same check for MCI_STATUS_EN here? * TBD do the same check for MCI_STATUS_EN here?
*/ */
if (!(flags & MCP_UC) && if (!(flags & MCP_UC) &&
(m.status & (mce_ser ? MCI_STATUS_S : MCI_STATUS_UC))) (m.status & (mca_cfg.ser ? MCI_STATUS_S : MCI_STATUS_UC)))
continue; continue;
mce_read_aux(&m, i); mce_read_aux(&m, i);
@ -631,7 +623,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
* Don't get the IP here because it's unlikely to * Don't get the IP here because it's unlikely to
* have anything to do with the actual error location. * have anything to do with the actual error location.
*/ */
if (!(flags & MCP_DONTLOG) && !mce_dont_log_ce) if (!(flags & MCP_DONTLOG) && !mca_cfg.dont_log_ce)
mce_log(&m); mce_log(&m);
/* /*
@ -658,14 +650,14 @@ static int mce_no_way_out(struct mce *m, char **msg, unsigned long *validp,
{ {
int i, ret = 0; int i, ret = 0;
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
m->status = mce_rdmsrl(MSR_IA32_MCx_STATUS(i)); m->status = mce_rdmsrl(MSR_IA32_MCx_STATUS(i));
if (m->status & MCI_STATUS_VAL) { if (m->status & MCI_STATUS_VAL) {
__set_bit(i, validp); __set_bit(i, validp);
if (quirk_no_way_out) if (quirk_no_way_out)
quirk_no_way_out(i, m, regs); quirk_no_way_out(i, m, regs);
} }
if (mce_severity(m, tolerant, msg) >= MCE_PANIC_SEVERITY) if (mce_severity(m, mca_cfg.tolerant, msg) >= MCE_PANIC_SEVERITY)
ret = 1; ret = 1;
} }
return ret; return ret;
@ -696,11 +688,11 @@ static int mce_timed_out(u64 *t)
rmb(); rmb();
if (atomic_read(&mce_paniced)) if (atomic_read(&mce_paniced))
wait_for_panic(); wait_for_panic();
if (!monarch_timeout) if (!mca_cfg.monarch_timeout)
goto out; goto out;
if ((s64)*t < SPINUNIT) { if ((s64)*t < SPINUNIT) {
/* CHECKME: Make panic default for 1 too? */ /* CHECKME: Make panic default for 1 too? */
if (tolerant < 1) if (mca_cfg.tolerant < 1)
mce_panic("Timeout synchronizing machine check over CPUs", mce_panic("Timeout synchronizing machine check over CPUs",
NULL, NULL); NULL, NULL);
cpu_missing = 1; cpu_missing = 1;
@ -750,7 +742,8 @@ static void mce_reign(void)
* Grade the severity of the errors of all the CPUs. * Grade the severity of the errors of all the CPUs.
*/ */
for_each_possible_cpu(cpu) { for_each_possible_cpu(cpu) {
int severity = mce_severity(&per_cpu(mces_seen, cpu), tolerant, int severity = mce_severity(&per_cpu(mces_seen, cpu),
mca_cfg.tolerant,
&nmsg); &nmsg);
if (severity > global_worst) { if (severity > global_worst) {
msg = nmsg; msg = nmsg;
@ -764,7 +757,7 @@ static void mce_reign(void)
* This dumps all the mces in the log buffer and stops the * This dumps all the mces in the log buffer and stops the
* other CPUs. * other CPUs.
*/ */
if (m && global_worst >= MCE_PANIC_SEVERITY && tolerant < 3) if (m && global_worst >= MCE_PANIC_SEVERITY && mca_cfg.tolerant < 3)
mce_panic("Fatal Machine check", m, msg); mce_panic("Fatal Machine check", m, msg);
/* /*
@ -777,7 +770,7 @@ static void mce_reign(void)
* No machine check event found. Must be some external * No machine check event found. Must be some external
* source or one CPU is hung. Panic. * source or one CPU is hung. Panic.
*/ */
if (global_worst <= MCE_KEEP_SEVERITY && tolerant < 3) if (global_worst <= MCE_KEEP_SEVERITY && mca_cfg.tolerant < 3)
mce_panic("Machine check from unknown source", NULL, NULL); mce_panic("Machine check from unknown source", NULL, NULL);
/* /*
@ -801,7 +794,7 @@ static int mce_start(int *no_way_out)
{ {
int order; int order;
int cpus = num_online_cpus(); int cpus = num_online_cpus();
u64 timeout = (u64)monarch_timeout * NSEC_PER_USEC; u64 timeout = (u64)mca_cfg.monarch_timeout * NSEC_PER_USEC;
if (!timeout) if (!timeout)
return -1; return -1;
@ -865,7 +858,7 @@ static int mce_start(int *no_way_out)
static int mce_end(int order) static int mce_end(int order)
{ {
int ret = -1; int ret = -1;
u64 timeout = (u64)monarch_timeout * NSEC_PER_USEC; u64 timeout = (u64)mca_cfg.monarch_timeout * NSEC_PER_USEC;
if (!timeout) if (!timeout)
goto reset; goto reset;
@ -946,7 +939,7 @@ static void mce_clear_state(unsigned long *toclear)
{ {
int i; int i;
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
if (test_bit(i, toclear)) if (test_bit(i, toclear))
mce_wrmsrl(MSR_IA32_MCx_STATUS(i), 0); mce_wrmsrl(MSR_IA32_MCx_STATUS(i), 0);
} }
@ -1011,6 +1004,7 @@ static void mce_clear_info(struct mce_info *mi)
*/ */
void do_machine_check(struct pt_regs *regs, long error_code) void do_machine_check(struct pt_regs *regs, long error_code)
{ {
struct mca_config *cfg = &mca_cfg;
struct mce m, *final; struct mce m, *final;
int i; int i;
int worst = 0; int worst = 0;
@ -1022,7 +1016,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
int order; int order;
/* /*
* If no_way_out gets set, there is no safe way to recover from this * 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. * MCE. If mca_cfg.tolerant is cranked up, we'll try anyway.
*/ */
int no_way_out = 0; int no_way_out = 0;
/* /*
@ -1038,7 +1032,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
this_cpu_inc(mce_exception_count); this_cpu_inc(mce_exception_count);
if (!banks) if (!cfg->banks)
goto out; goto out;
mce_gather_info(&m, regs); mce_gather_info(&m, regs);
@ -1065,7 +1059,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
* because the first one to see it will clear it. * because the first one to see it will clear it.
*/ */
order = mce_start(&no_way_out); order = mce_start(&no_way_out);
for (i = 0; i < banks; i++) { for (i = 0; i < cfg->banks; i++) {
__clear_bit(i, toclear); __clear_bit(i, toclear);
if (!test_bit(i, valid_banks)) if (!test_bit(i, valid_banks))
continue; continue;
@ -1084,7 +1078,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
* Non uncorrected or non signaled errors are handled by * Non uncorrected or non signaled errors are handled by
* machine_check_poll. Leave them alone, unless this panics. * machine_check_poll. Leave them alone, unless this panics.
*/ */
if (!(m.status & (mce_ser ? MCI_STATUS_S : MCI_STATUS_UC)) && if (!(m.status & (cfg->ser ? MCI_STATUS_S : MCI_STATUS_UC)) &&
!no_way_out) !no_way_out)
continue; continue;
@ -1093,7 +1087,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
*/ */
add_taint(TAINT_MACHINE_CHECK); add_taint(TAINT_MACHINE_CHECK);
severity = mce_severity(&m, tolerant, NULL); severity = mce_severity(&m, cfg->tolerant, NULL);
/* /*
* When machine check was for corrected handler don't touch, * When machine check was for corrected handler don't touch,
@ -1117,7 +1111,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
* When the ring overflows we just ignore the AO error. * When the ring overflows we just ignore the AO error.
* RED-PEN add some logging mechanism when * RED-PEN add some logging mechanism when
* usable_address or mce_add_ring fails. * usable_address or mce_add_ring fails.
* RED-PEN don't ignore overflow for tolerant == 0 * RED-PEN don't ignore overflow for mca_cfg.tolerant == 0
*/ */
if (severity == MCE_AO_SEVERITY && mce_usable_address(&m)) if (severity == MCE_AO_SEVERITY && mce_usable_address(&m))
mce_ring_add(m.addr >> PAGE_SHIFT); mce_ring_add(m.addr >> PAGE_SHIFT);
@ -1149,7 +1143,7 @@ void do_machine_check(struct pt_regs *regs, long error_code)
* issues we try to recover, or limit damage to the current * issues we try to recover, or limit damage to the current
* process. * process.
*/ */
if (tolerant < 3) { if (cfg->tolerant < 3) {
if (no_way_out) if (no_way_out)
mce_panic("Fatal machine check on current CPU", &m, msg); mce_panic("Fatal machine check on current CPU", &m, msg);
if (worst == MCE_AR_SEVERITY) { if (worst == MCE_AR_SEVERITY) {
@ -1377,11 +1371,13 @@ EXPORT_SYMBOL_GPL(mce_notify_irq);
static int __cpuinit __mcheck_cpu_mce_banks_init(void) static int __cpuinit __mcheck_cpu_mce_banks_init(void)
{ {
int i; int i;
u8 num_banks = mca_cfg.banks;
mce_banks = kzalloc(banks * sizeof(struct mce_bank), GFP_KERNEL); mce_banks = kzalloc(num_banks * sizeof(struct mce_bank), GFP_KERNEL);
if (!mce_banks) if (!mce_banks)
return -ENOMEM; return -ENOMEM;
for (i = 0; i < banks; i++) {
for (i = 0; i < num_banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
b->ctl = -1ULL; b->ctl = -1ULL;
@ -1401,7 +1397,7 @@ static int __cpuinit __mcheck_cpu_cap_init(void)
rdmsrl(MSR_IA32_MCG_CAP, cap); rdmsrl(MSR_IA32_MCG_CAP, cap);
b = cap & MCG_BANKCNT_MASK; b = cap & MCG_BANKCNT_MASK;
if (!banks) if (!mca_cfg.banks)
pr_info("CPU supports %d MCE banks\n", b); pr_info("CPU supports %d MCE banks\n", b);
if (b > MAX_NR_BANKS) { if (b > MAX_NR_BANKS) {
@ -1411,8 +1407,9 @@ static int __cpuinit __mcheck_cpu_cap_init(void)
} }
/* Don't support asymmetric configurations today */ /* Don't support asymmetric configurations today */
WARN_ON(banks != 0 && b != banks); WARN_ON(mca_cfg.banks != 0 && b != mca_cfg.banks);
banks = b; mca_cfg.banks = b;
if (!mce_banks) { if (!mce_banks) {
int err = __mcheck_cpu_mce_banks_init(); int err = __mcheck_cpu_mce_banks_init();
@ -1422,25 +1419,29 @@ static int __cpuinit __mcheck_cpu_cap_init(void)
/* Use accurate RIP reporting if available. */ /* Use accurate RIP reporting if available. */
if ((cap & MCG_EXT_P) && MCG_EXT_CNT(cap) >= 9) if ((cap & MCG_EXT_P) && MCG_EXT_CNT(cap) >= 9)
rip_msr = MSR_IA32_MCG_EIP; mca_cfg.rip_msr = MSR_IA32_MCG_EIP;
if (cap & MCG_SER_P) if (cap & MCG_SER_P)
mce_ser = 1; mca_cfg.ser = true;
return 0; return 0;
} }
static void __mcheck_cpu_init_generic(void) static void __mcheck_cpu_init_generic(void)
{ {
enum mcp_flags m_fl = 0;
mce_banks_t all_banks; mce_banks_t all_banks;
u64 cap; u64 cap;
int i; int i;
if (!mca_cfg.bootlog)
m_fl = MCP_DONTLOG;
/* /*
* Log the machine checks left over from the previous reset. * Log the machine checks left over from the previous reset.
*/ */
bitmap_fill(all_banks, MAX_NR_BANKS); bitmap_fill(all_banks, MAX_NR_BANKS);
machine_check_poll(MCP_UC|(!mce_bootlog ? MCP_DONTLOG : 0), &all_banks); machine_check_poll(MCP_UC | m_fl, &all_banks);
set_in_cr4(X86_CR4_MCE); set_in_cr4(X86_CR4_MCE);
@ -1448,7 +1449,7 @@ static void __mcheck_cpu_init_generic(void)
if (cap & MCG_CTL_P) if (cap & MCG_CTL_P)
wrmsr(MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff); wrmsr(MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
if (!b->init) if (!b->init)
@ -1489,6 +1490,8 @@ static void quirk_sandybridge_ifu(int bank, struct mce *m, struct pt_regs *regs)
/* Add per CPU specific workarounds here */ /* Add per CPU specific workarounds here */
static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c) static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
{ {
struct mca_config *cfg = &mca_cfg;
if (c->x86_vendor == X86_VENDOR_UNKNOWN) { if (c->x86_vendor == X86_VENDOR_UNKNOWN) {
pr_info("unknown CPU type - not enabling MCE support\n"); pr_info("unknown CPU type - not enabling MCE support\n");
return -EOPNOTSUPP; return -EOPNOTSUPP;
@ -1496,7 +1499,7 @@ static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
/* This should be disabled by the BIOS, but isn't always */ /* This should be disabled by the BIOS, but isn't always */
if (c->x86_vendor == X86_VENDOR_AMD) { if (c->x86_vendor == X86_VENDOR_AMD) {
if (c->x86 == 15 && banks > 4) { if (c->x86 == 15 && cfg->banks > 4) {
/* /*
* disable GART TBL walk error reporting, which * disable GART TBL walk error reporting, which
* trips off incorrectly with the IOMMU & 3ware * trips off incorrectly with the IOMMU & 3ware
@ -1504,18 +1507,18 @@ static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
*/ */
clear_bit(10, (unsigned long *)&mce_banks[4].ctl); clear_bit(10, (unsigned long *)&mce_banks[4].ctl);
} }
if (c->x86 <= 17 && mce_bootlog < 0) { if (c->x86 <= 17 && cfg->bootlog < 0) {
/* /*
* Lots of broken BIOS around that don't clear them * Lots of broken BIOS around that don't clear them
* by default and leave crap in there. Don't log: * by default and leave crap in there. Don't log:
*/ */
mce_bootlog = 0; cfg->bootlog = 0;
} }
/* /*
* Various K7s with broken bank 0 around. Always disable * Various K7s with broken bank 0 around. Always disable
* by default. * by default.
*/ */
if (c->x86 == 6 && banks > 0) if (c->x86 == 6 && cfg->banks > 0)
mce_banks[0].ctl = 0; mce_banks[0].ctl = 0;
/* /*
@ -1566,7 +1569,7 @@ static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
* valid event later, merely don't write CTL0. * valid event later, merely don't write CTL0.
*/ */
if (c->x86 == 6 && c->x86_model < 0x1A && banks > 0) if (c->x86 == 6 && c->x86_model < 0x1A && cfg->banks > 0)
mce_banks[0].init = 0; mce_banks[0].init = 0;
/* /*
@ -1574,23 +1577,23 @@ static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
* synchronization with a one second timeout. * synchronization with a one second timeout.
*/ */
if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xe)) && if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model >= 0xe)) &&
monarch_timeout < 0) cfg->monarch_timeout < 0)
monarch_timeout = USEC_PER_SEC; cfg->monarch_timeout = USEC_PER_SEC;
/* /*
* There are also broken BIOSes on some Pentium M and * There are also broken BIOSes on some Pentium M and
* earlier systems: * earlier systems:
*/ */
if (c->x86 == 6 && c->x86_model <= 13 && mce_bootlog < 0) if (c->x86 == 6 && c->x86_model <= 13 && cfg->bootlog < 0)
mce_bootlog = 0; cfg->bootlog = 0;
if (c->x86 == 6 && c->x86_model == 45) if (c->x86 == 6 && c->x86_model == 45)
quirk_no_way_out = quirk_sandybridge_ifu; quirk_no_way_out = quirk_sandybridge_ifu;
} }
if (monarch_timeout < 0) if (cfg->monarch_timeout < 0)
monarch_timeout = 0; cfg->monarch_timeout = 0;
if (mce_bootlog != 0) if (cfg->bootlog != 0)
mce_panic_timeout = 30; cfg->panic_timeout = 30;
return 0; return 0;
} }
@ -1635,7 +1638,7 @@ static void mce_start_timer(unsigned int cpu, struct timer_list *t)
__this_cpu_write(mce_next_interval, iv); __this_cpu_write(mce_next_interval, iv);
if (mce_ignore_ce || !iv) if (mca_cfg.ignore_ce || !iv)
return; return;
t->expires = round_jiffies(jiffies + iv); t->expires = round_jiffies(jiffies + iv);
@ -1668,7 +1671,7 @@ void (*machine_check_vector)(struct pt_regs *, long error_code) =
*/ */
void __cpuinit mcheck_cpu_init(struct cpuinfo_x86 *c) void __cpuinit mcheck_cpu_init(struct cpuinfo_x86 *c)
{ {
if (mce_disabled) if (mca_cfg.disabled)
return; return;
if (__mcheck_cpu_ancient_init(c)) if (__mcheck_cpu_ancient_init(c))
@ -1678,7 +1681,7 @@ void __cpuinit mcheck_cpu_init(struct cpuinfo_x86 *c)
return; return;
if (__mcheck_cpu_cap_init() < 0 || __mcheck_cpu_apply_quirks(c) < 0) { if (__mcheck_cpu_cap_init() < 0 || __mcheck_cpu_apply_quirks(c) < 0) {
mce_disabled = 1; mca_cfg.disabled = true;
return; return;
} }
@ -1951,6 +1954,8 @@ static struct miscdevice mce_chrdev_device = {
*/ */
static int __init mcheck_enable(char *str) static int __init mcheck_enable(char *str)
{ {
struct mca_config *cfg = &mca_cfg;
if (*str == 0) { if (*str == 0) {
enable_p5_mce(); enable_p5_mce();
return 1; return 1;
@ -1958,22 +1963,22 @@ static int __init mcheck_enable(char *str)
if (*str == '=') if (*str == '=')
str++; str++;
if (!strcmp(str, "off")) if (!strcmp(str, "off"))
mce_disabled = 1; cfg->disabled = true;
else if (!strcmp(str, "no_cmci")) else if (!strcmp(str, "no_cmci"))
mce_cmci_disabled = 1; cfg->cmci_disabled = true;
else if (!strcmp(str, "dont_log_ce")) else if (!strcmp(str, "dont_log_ce"))
mce_dont_log_ce = 1; cfg->dont_log_ce = true;
else if (!strcmp(str, "ignore_ce")) else if (!strcmp(str, "ignore_ce"))
mce_ignore_ce = 1; cfg->ignore_ce = true;
else if (!strcmp(str, "bootlog") || !strcmp(str, "nobootlog")) else if (!strcmp(str, "bootlog") || !strcmp(str, "nobootlog"))
mce_bootlog = (str[0] == 'b'); cfg->bootlog = (str[0] == 'b');
else if (!strcmp(str, "bios_cmci_threshold")) else if (!strcmp(str, "bios_cmci_threshold"))
mce_bios_cmci_threshold = 1; cfg->bios_cmci_threshold = true;
else if (isdigit(str[0])) { else if (isdigit(str[0])) {
get_option(&str, &tolerant); get_option(&str, &(cfg->tolerant));
if (*str == ',') { if (*str == ',') {
++str; ++str;
get_option(&str, &monarch_timeout); get_option(&str, &(cfg->monarch_timeout));
} }
} else { } else {
pr_info("mce argument %s ignored. Please use /sys\n", str); pr_info("mce argument %s ignored. Please use /sys\n", str);
@ -2002,7 +2007,7 @@ static int mce_disable_error_reporting(void)
{ {
int i; int i;
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
if (b->init) if (b->init)
@ -2142,15 +2147,15 @@ static ssize_t set_ignore_ce(struct device *s,
if (strict_strtoull(buf, 0, &new) < 0) if (strict_strtoull(buf, 0, &new) < 0)
return -EINVAL; return -EINVAL;
if (mce_ignore_ce ^ !!new) { if (mca_cfg.ignore_ce ^ !!new) {
if (new) { if (new) {
/* disable ce features */ /* disable ce features */
mce_timer_delete_all(); mce_timer_delete_all();
on_each_cpu(mce_disable_cmci, NULL, 1); on_each_cpu(mce_disable_cmci, NULL, 1);
mce_ignore_ce = 1; mca_cfg.ignore_ce = true;
} else { } else {
/* enable ce features */ /* enable ce features */
mce_ignore_ce = 0; mca_cfg.ignore_ce = false;
on_each_cpu(mce_enable_ce, (void *)1, 1); on_each_cpu(mce_enable_ce, (void *)1, 1);
} }
} }
@ -2166,14 +2171,14 @@ static ssize_t set_cmci_disabled(struct device *s,
if (strict_strtoull(buf, 0, &new) < 0) if (strict_strtoull(buf, 0, &new) < 0)
return -EINVAL; return -EINVAL;
if (mce_cmci_disabled ^ !!new) { if (mca_cfg.cmci_disabled ^ !!new) {
if (new) { if (new) {
/* disable cmci */ /* disable cmci */
on_each_cpu(mce_disable_cmci, NULL, 1); on_each_cpu(mce_disable_cmci, NULL, 1);
mce_cmci_disabled = 1; mca_cfg.cmci_disabled = true;
} else { } else {
/* enable cmci */ /* enable cmci */
mce_cmci_disabled = 0; mca_cfg.cmci_disabled = false;
on_each_cpu(mce_enable_ce, NULL, 1); on_each_cpu(mce_enable_ce, NULL, 1);
} }
} }
@ -2190,9 +2195,9 @@ static ssize_t store_int_with_restart(struct device *s,
} }
static DEVICE_ATTR(trigger, 0644, show_trigger, set_trigger); static DEVICE_ATTR(trigger, 0644, show_trigger, set_trigger);
static DEVICE_INT_ATTR(tolerant, 0644, tolerant); static DEVICE_INT_ATTR(tolerant, 0644, mca_cfg.tolerant);
static DEVICE_INT_ATTR(monarch_timeout, 0644, monarch_timeout); static DEVICE_INT_ATTR(monarch_timeout, 0644, mca_cfg.monarch_timeout);
static DEVICE_INT_ATTR(dont_log_ce, 0644, mce_dont_log_ce); static DEVICE_BOOL_ATTR(dont_log_ce, 0644, mca_cfg.dont_log_ce);
static struct dev_ext_attribute dev_attr_check_interval = { static struct dev_ext_attribute dev_attr_check_interval = {
__ATTR(check_interval, 0644, device_show_int, store_int_with_restart), __ATTR(check_interval, 0644, device_show_int, store_int_with_restart),
@ -2200,13 +2205,13 @@ static struct dev_ext_attribute dev_attr_check_interval = {
}; };
static struct dev_ext_attribute dev_attr_ignore_ce = { static struct dev_ext_attribute dev_attr_ignore_ce = {
__ATTR(ignore_ce, 0644, device_show_int, set_ignore_ce), __ATTR(ignore_ce, 0644, device_show_bool, set_ignore_ce),
&mce_ignore_ce &mca_cfg.ignore_ce
}; };
static struct dev_ext_attribute dev_attr_cmci_disabled = { static struct dev_ext_attribute dev_attr_cmci_disabled = {
__ATTR(cmci_disabled, 0644, device_show_int, set_cmci_disabled), __ATTR(cmci_disabled, 0644, device_show_bool, set_cmci_disabled),
&mce_cmci_disabled &mca_cfg.cmci_disabled
}; };
static struct device_attribute *mce_device_attrs[] = { static struct device_attribute *mce_device_attrs[] = {
@ -2253,7 +2258,7 @@ static __cpuinit int mce_device_create(unsigned int cpu)
if (err) if (err)
goto error; goto error;
} }
for (j = 0; j < banks; j++) { for (j = 0; j < mca_cfg.banks; j++) {
err = device_create_file(dev, &mce_banks[j].attr); err = device_create_file(dev, &mce_banks[j].attr);
if (err) if (err)
goto error2; goto error2;
@ -2285,7 +2290,7 @@ static __cpuinit void mce_device_remove(unsigned int cpu)
for (i = 0; mce_device_attrs[i]; i++) for (i = 0; mce_device_attrs[i]; i++)
device_remove_file(dev, mce_device_attrs[i]); device_remove_file(dev, mce_device_attrs[i]);
for (i = 0; i < banks; i++) for (i = 0; i < mca_cfg.banks; i++)
device_remove_file(dev, &mce_banks[i].attr); device_remove_file(dev, &mce_banks[i].attr);
device_unregister(dev); device_unregister(dev);
@ -2304,7 +2309,7 @@ static void __cpuinit mce_disable_cpu(void *h)
if (!(action & CPU_TASKS_FROZEN)) if (!(action & CPU_TASKS_FROZEN))
cmci_clear(); cmci_clear();
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
if (b->init) if (b->init)
@ -2322,7 +2327,7 @@ static void __cpuinit mce_reenable_cpu(void *h)
if (!(action & CPU_TASKS_FROZEN)) if (!(action & CPU_TASKS_FROZEN))
cmci_reenable(); cmci_reenable();
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
if (b->init) if (b->init)
@ -2375,7 +2380,7 @@ static __init void mce_init_banks(void)
{ {
int i; int i;
for (i = 0; i < banks; i++) { for (i = 0; i < mca_cfg.banks; i++) {
struct mce_bank *b = &mce_banks[i]; struct mce_bank *b = &mce_banks[i];
struct device_attribute *a = &b->attr; struct device_attribute *a = &b->attr;
@ -2426,7 +2431,7 @@ device_initcall_sync(mcheck_init_device);
*/ */
static int __init mcheck_disable(char *str) static int __init mcheck_disable(char *str)
{ {
mce_disabled = 1; mca_cfg.disabled = true;
return 1; return 1;
} }
__setup("nomce", mcheck_disable); __setup("nomce", mcheck_disable);

8
arch/x86/kernel/cpu/mcheck/mce_intel.c
View File

@ -53,7 +53,7 @@ static int cmci_supported(int *banks)
{ {
u64 cap; u64 cap;
if (mce_cmci_disabled || mce_ignore_ce) if (mca_cfg.cmci_disabled || mca_cfg.ignore_ce)
return 0; return 0;
/* /*
@ -200,7 +200,7 @@ static void cmci_discover(int banks)
continue; continue;
} }
if (!mce_bios_cmci_threshold) { if (!mca_cfg.bios_cmci_threshold) {
val &= ~MCI_CTL2_CMCI_THRESHOLD_MASK; val &= ~MCI_CTL2_CMCI_THRESHOLD_MASK;
val |= CMCI_THRESHOLD; val |= CMCI_THRESHOLD;
} else if (!(val & MCI_CTL2_CMCI_THRESHOLD_MASK)) { } else if (!(val & MCI_CTL2_CMCI_THRESHOLD_MASK)) {
@ -227,7 +227,7 @@ static void cmci_discover(int banks)
* set the thresholds properly or does not work with * set the thresholds properly or does not work with
* this boot option. Note down now and report later. * this boot option. Note down now and report later.
*/ */
if (mce_bios_cmci_threshold && bios_zero_thresh && if (mca_cfg.bios_cmci_threshold && bios_zero_thresh &&
(val & MCI_CTL2_CMCI_THRESHOLD_MASK)) (val & MCI_CTL2_CMCI_THRESHOLD_MASK))
bios_wrong_thresh = 1; bios_wrong_thresh = 1;
} else { } else {
@ -235,7 +235,7 @@ static void cmci_discover(int banks)
} }
} }
raw_spin_unlock_irqrestore(&cmci_discover_lock, flags); raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
if (mce_bios_cmci_threshold && bios_wrong_thresh) { if (mca_cfg.bios_cmci_threshold && bios_wrong_thresh) {
pr_info_once( pr_info_once(
"bios_cmci_threshold: Some banks do not have valid thresholds set\n"); "bios_cmci_threshold: Some banks do not have valid thresholds set\n");
pr_info_once( pr_info_once(

2
arch/x86/lguest/boot.c
View File

@ -1412,7 +1412,7 @@ __init void lguest_init(void)
/* We don't have features. We have puppies! Puppies! */ /* We don't have features. We have puppies! Puppies! */
#ifdef CONFIG_X86_MCE #ifdef CONFIG_X86_MCE
mce_disabled = 1; mca_cfg.disabled = true;
#endif #endif
#ifdef CONFIG_ACPI #ifdef CONFIG_ACPI
acpi_disabled = 1; acpi_disabled = 1;

21
drivers/base/core.c
View File

@ -171,6 +171,27 @@ ssize_t device_show_int(struct device *dev,
} }
EXPORT_SYMBOL_GPL(device_show_int); EXPORT_SYMBOL_GPL(device_show_int);
ssize_t device_store_bool(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
if (strtobool(buf, ea->var) < 0)
return -EINVAL;
return size;
}
EXPORT_SYMBOL_GPL(device_store_bool);
ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_bool);
/** /**
* device_release - free device structure. * device_release - free device structure.
* @kobj: device's kobject. * @kobj: device's kobject.

7
include/linux/device.h
View File

@ -496,6 +496,10 @@ ssize_t device_show_int(struct device *dev, struct device_attribute *attr,
char *buf); char *buf);
ssize_t device_store_int(struct device *dev, struct device_attribute *attr, ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count); const char *buf, size_t count);
ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
char *buf);
ssize_t device_store_bool(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count);
#define DEVICE_ATTR(_name, _mode, _show, _store) \ #define DEVICE_ATTR(_name, _mode, _show, _store) \
struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
@ -505,6 +509,9 @@ ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
#define DEVICE_INT_ATTR(_name, _mode, _var) \ #define DEVICE_INT_ATTR(_name, _mode, _var) \
struct dev_ext_attribute dev_attr_##_name = \ struct dev_ext_attribute dev_attr_##_name = \
{ __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) } { __ATTR(_name, _mode, device_show_int, device_store_int), &(_var) }
#define DEVICE_BOOL_ATTR(_name, _mode, _var) \
struct dev_ext_attribute dev_attr_##_name = \
{ __ATTR(_name, _mode, device_show_bool, device_store_bool), &(_var) }
#define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \ #define DEVICE_ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) \
struct device_attribute dev_attr_##_name = \ struct device_attribute dev_attr_##_name = \
__ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store) __ATTR_IGNORE_LOCKDEP(_name, _mode, _show, _store)