linux-kernel - [tip: x86/urgent] x86/microcode/AMD: Add more known models to entry sign checking

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Message-ID: <176251502918.2601451.14150403069865878876.tip-bot2@tip-bot2>
Date: Fri, 07 Nov 2025 11:30:28 -0000
From: "tip-bot2 for Mario Limonciello (AMD)" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Mario Limonciello (AMD)" <superm1@...nel.org>,
 "Borislav Petkov (AMD)" <bp@...en8.de>,  <stable@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] x86/microcode/AMD: Add more known models to entry
 sign checking

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

Commit-ID:     d23550efc6800841b4d1639784afaebdea946ae0
Gitweb:        https://git.kernel.org/tip/d23550efc6800841b4d1639784afaebdea946ae0
Author:        Mario Limonciello (AMD) <superm1@...nel.org>
AuthorDate:    Thu, 06 Nov 2025 12:28:54 -06:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Fri, 07 Nov 2025 12:12:21 +01:00

x86/microcode/AMD: Add more known models to entry sign checking

Two Zen5 systems are missing from need_sha_check(). Add them.

Fixes: 50cef76d5cb0 ("x86/microcode/AMD: Load only SHA256-checksummed patches")
Signed-off-by: Mario Limonciello (AMD) <superm1@...nel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Cc: <stable@...nel.org>
Link: https://patch.msgid.link/20251106182904.4143757-1-superm1@kernel.org
---
 arch/x86/kernel/cpu/microcode/amd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index b7c797d..dc82153 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -220,10 +220,12 @@ static bool need_sha_check(u32 cur_rev)
 	case 0xaa001: return cur_rev <= 0xaa00116; break;
 	case 0xaa002: return cur_rev <= 0xaa00218; break;
 	case 0xb0021: return cur_rev <= 0xb002146; break;
+	case 0xb0081: return cur_rev <= 0xb008111; break;
 	case 0xb1010: return cur_rev <= 0xb101046; break;
 	case 0xb2040: return cur_rev <= 0xb204031; break;
 	case 0xb4040: return cur_rev <= 0xb404031; break;
 	case 0xb6000: return cur_rev <= 0xb600031; break;
+	case 0xb6080: return cur_rev <= 0xb608031; break;
 	case 0xb7000: return cur_rev <= 0xb700031; break;
 	default: break;
 	}