[PATCH 6.12 442/567] x86/microcode/AMD: Fix Entrysign revision check for Zen5/Strix Halo

Greg Kroah-Hartman
2026-01-06T17:38:42Z

From: Rong Zhang <i@rong.moe>

commit 150b1b97e27513535dcd3795d5ecd28e61b6cb8c upstream.

Zen5 also contains family 1Ah, models 70h-7Fh, which are mistakenly missing
from cpu_has_entrysign(). Add the missing range.

Fixes: 8a9fb5129e8e ("x86/microcode/AMD: Limit Entrysign signature checking to known generations")
Signed-off-by: Rong Zhang <i@rong.moe>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: stable@kernel.org
Link: https://patch.msgid.link/20251229182245.152747-1-i@rong.moe
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/kernel/cpu/microcode/amd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -235,7 +235,7 @@ static bool cpu_has_entrysign(void)
if (fam == 0x1a) {
if (model <= 0x2f ||
(0x40 <= model && model <= 0x4f) ||
- (0x60 <= model && model <= 0x6f))
+ (0x60 <= model && model <= 0x7f))
return true;
}