linux-kernel - [tip: x86/urgent] x86/microcode/AMD: Fix Entrysign revision check for Zen5/Strix Halo

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Message-ID: <176703598526.510.8616302363173639584.tip-bot2@tip-bot2>
Date: Mon, 29 Dec 2025 19:19:45 -0000
From: "tip-bot2 for Rong Zhang" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Rong Zhang <i@...g.moe>, "Borislav Petkov (AMD)" <bp@...en8.de>,
 stable@...nel.org, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] x86/microcode/AMD: Fix Entrysign revision check for
 Zen5/Strix Halo

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     150b1b97e27513535dcd3795d5ecd28e61b6cb8c
Gitweb:        https://git.kernel.org/tip/150b1b97e27513535dcd3795d5ecd28e61b6cb8c
Author:        Rong Zhang <i@...g.moe>
AuthorDate:    Tue, 30 Dec 2025 02:22:21 +08:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Mon, 29 Dec 2025 20:08:02 +01:00

x86/microcode/AMD: Fix Entrysign revision check for Zen5/Strix Halo

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@...g.moe>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Cc: stable@...nel.org
Link: https://patch.msgid.link/20251229182245.152747-1-i@rong.moe
---
 arch/x86/kernel/cpu/microcode/amd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 3821a98..4667353 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -258,7 +258,7 @@ 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;
 	}