forked from Minki/linux
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: Tony Luck <tony.luck@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yazen Ghannam <yazen.ghannam@amd.com> Cc: linux-edac <linux-edac@vger.kernel.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20180301233449.24311-1-tony.luck@intel.com
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@ -30,6 +30,7 @@ struct mce {
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__u64 synd; /* MCA_SYND MSR: only valid on SMCA systems */
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__u64 ipid; /* MCA_IPID MSR: only valid on SMCA systems */
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__u64 ppin; /* Protected Processor Inventory Number */
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__u32 microcode;/* Microcode revision */
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};
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#define MCE_GET_RECORD_LEN _IOR('M', 1, int)
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@ -130,6 +130,8 @@ void mce_setup(struct mce *m)
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if (this_cpu_has(X86_FEATURE_INTEL_PPIN))
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rdmsrl(MSR_PPIN, m->ppin);
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m->microcode = boot_cpu_data.microcode;
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}
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DEFINE_PER_CPU(struct mce, injectm);
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@ -262,7 +264,7 @@ static void __print_mce(struct mce *m)
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*/
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pr_emerg(HW_ERR "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x microcode %x\n",
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m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid,
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cpu_data(m->extcpu).microcode);
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m->microcode);
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}
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static void print_mce(struct mce *m)
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