Re: [PATCH v2] x86/mce: work around an erratum on fast string copy instructions.

[Borislav Petkov]

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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