x86/mce/inject: Only write MCA_MISC when a value has been supplied

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The MCA_MISC register is used to control the MCA thresholding feature on
AMD systems. Therefore, it is not generally part of the error state that
a user would adjust when testing non-thresholding cases.

However, MCA_MISC is unconditionally written even if a user does not
supply a value. The default value of '0' will be used and clobber the
register.

Write the MCA_MISC register only if the user has given a value for it.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240523155641.2805411-2-yazen.ghannam@amd.com

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Yazen Ghannam 2024-05-23 10:56:33 -05:00 • committed by Borislav Petkov (AMD)

parent 1613e604df

commit ede18982f1

1 changed files with 6 additions and 2 deletions

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arch/x86/kernel/cpu/mce/inject.c

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