Re: [PATCH v2] x86/mce: work around an erratum on fast string copy instructions.
From: Borislav Petkov
Date: Fri Feb 18 2022 - 11:14:10 EST
On Fri, Feb 18, 2022 at 08:03:24AM -0800, Jue Wang wrote:
> Since MSR_IA32_MISC_ENABLE is not a MCA register, I wonder if we want
> to mix its read/write with the injected MCE code.
>
> I was a bit concerned about potential race with mce-inject and the
> read/write to MSR_IA32_MISC_ENABLE.
It won't inject anything:
offset = msr_to_offset(msr);
if (offset < 0)
ret = 0;
Besides, you need to use those routines due to EX_TYPE_{RD,WR}MSR_IN_MCE
--
Regards/Gruss,
Boris.
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