x86/microcode/intel: Reject problematic loading on Granite Rapids systems

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Microcode updates can usually jump revisions. However, there is an erratum on
Granite Rapids systems. If they "jump over" revision 0x1000405, they result in
an #MC. Avoid it.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260916225939.1144524-1-chang.seok.bae@intel.com

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Chang S. Bae 2026-09-16 22:59:39 +00:00 • committed by Borislav Petkov (AMD)

parent 27600805e6

commit e7d3e2f46d

1 changed files with 26 additions and 0 deletions

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arch/x86/kernel/cpu/microcode/intel.c

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