Commit fa94d0c6 authored by Tony Luck's avatar Tony Luck Committed by Thomas Gleixner

x86/MCE: Save microcode revision in machine check records

Updating microcode used to be relatively rare. Now that it has become
more common we should save the microcode version in a machine check
record to make sure that those people looking at the error have this
important information bundled with the rest of the logged information.

[ Borislav: Simplify a bit. ]
Signed-off-by: default avatarTony Luck <>
Signed-off-by: default avatarBorislav Petkov <>
Signed-off-by: default avatarThomas Gleixner <>
Cc: Yazen Ghannam <>
Cc: linux-edac <>
parent 1b88accf
......@@ -30,6 +30,7 @@ struct mce {
__u64 synd; /* MCA_SYND MSR: only valid on SMCA systems */
__u64 ipid; /* MCA_IPID MSR: only valid on SMCA systems */
__u64 ppin; /* Protected Processor Inventory Number */
__u32 microcode;/* Microcode revision */
#define MCE_GET_RECORD_LEN _IOR('M', 1, int)
......@@ -130,6 +130,8 @@ void mce_setup(struct mce *m)
if (this_cpu_has(X86_FEATURE_INTEL_PPIN))
rdmsrl(MSR_PPIN, m->ppin);
m->microcode = boot_cpu_data.microcode;
DEFINE_PER_CPU(struct mce, injectm);
......@@ -262,7 +264,7 @@ static void __print_mce(struct mce *m)
pr_emerg(HW_ERR "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x microcode %x\n",
m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid,
static void print_mce(struct mce *m)
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