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x86/mce/AMD: Log Deferred Errors using SMCA MCA_DE{STAT,ADDR} registers

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Scalable MCA provides new registers for all banks for logging deferred
errors: MCA_DESTAT and MCA_DEADDR. Deferred errors are always logged to
these registers.

Update the AMD deferred error handler to use these registers, if
available.

Signed-off-by: Yazen Ghannam <[email protected]>
[ Sanity-check __log_error() args, massage a bit. ]
Signed-off-by: Borislav Petkov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Aravind Gopalakrishnan <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: linux-edac <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Yazen Ghannam 2016-05-11 14:58:23 +02:00 • committed by Ingo Molnar
commit 3410200958
2 changed files with 28 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

4
arch/x86/include/asm/mce.h
View file

@ -110,6 +110,8 @@
#define MSR_AMD64_SMCA_MC0_MISC0 0xc0002003
#define MSR_AMD64_SMCA_MC0_CONFIG 0xc0002004
#define MSR_AMD64_SMCA_MC0_IPID 0xc0002005
#define MSR_AMD64_SMCA_MC0_DESTAT 0xc0002008
#define MSR_AMD64_SMCA_MC0_DEADDR 0xc0002009
#define MSR_AMD64_SMCA_MC0_MISC1 0xc000200a
#define MSR_AMD64_SMCA_MCx_CTL(x) (MSR_AMD64_SMCA_MC0_CTL + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_STATUS(x) (MSR_AMD64_SMCA_MC0_STATUS + 0x10*(x))
@ -117,6 +119,8 @@
#define MSR_AMD64_SMCA_MCx_MISC(x) (MSR_AMD64_SMCA_MC0_MISC0 + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_CONFIG(x) (MSR_AMD64_SMCA_MC0_CONFIG + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_IPID(x) (MSR_AMD64_SMCA_MC0_IPID + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_DESTAT(x) (MSR_AMD64_SMCA_MC0_DESTAT + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_DEADDR(x) (MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_MISCy(x, y) ((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x)))
/*

32
arch/x86/kernel/cpu/mcheck/mce_amd.c
View file

@ -430,12 +430,23 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c)
deferred_error_interrupt_enable(c);
}
static void __log_error(unsigned int bank, bool threshold_err, u64 misc)
static void
__log_error(unsigned int bank, bool deferred_err, bool threshold_err, u64 misc)
{
u32 msr_status = msr_ops.status(bank);
u32 msr_addr = msr_ops.addr(bank);
struct mce m;
u64 status;
rdmsrl(msr_ops.status(bank), status);
WARN_ON_ONCE(deferred_err && threshold_err);
if (deferred_err && mce_flags.smca) {
msr_status = MSR_AMD64_SMCA_MCx_DESTAT(bank);
msr_addr = MSR_AMD64_SMCA_MCx_DEADDR(bank);
}
rdmsrl(msr_status, status);
if (!(status & MCI_STATUS_VAL))
return;
@ -448,10 +459,11 @@ static void __log_error(unsigned int bank, bool threshold_err, u64 misc)
m.misc = misc;
if (m.status & MCI_STATUS_ADDRV)
rdmsrl(msr_ops.addr(bank), m.addr);
rdmsrl(msr_addr, m.addr);
mce_log(&m);
wrmsrl(msr_ops.status(bank), 0);
wrmsrl(msr_status, 0);
}
static inline void __smp_deferred_error_interrupt(void)
@ -479,17 +491,21 @@ asmlinkage __visible void smp_trace_deferred_error_interrupt(void)
/* APIC interrupt handler for deferred errors */
static void amd_deferred_error_interrupt(void)
{
u64 status;
unsigned int bank;
u32 msr_status;
u64 status;
for (bank = 0; bank < mca_cfg.banks; ++bank) {
rdmsrl(msr_ops.status(bank), status);
msr_status = (mce_flags.smca) ? MSR_AMD64_SMCA_MCx_DESTAT(bank)
: msr_ops.status(bank);
rdmsrl(msr_status, status);
if (!(status & MCI_STATUS_VAL) ||
!(status & MCI_STATUS_DEFERRED))
continue;
__log_error(bank, false, 0);
__log_error(bank, true, false, 0);
break;
}
}
@ -544,7 +560,7 @@ static void amd_threshold_interrupt(void)
return;
log:
__log_error(bank, true, ((u64)high << 32) | low);
__log_error(bank, false, true, ((u64)high << 32) | low);
}
/*