linux-kernel - [tip: x86/urgent] x86/microcode/AMD: Add Zen5 model 0x44, stepping 0x1 minrev

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Message-ID: <176312584528.498.488356338499799994.tip-bot2@tip-bot2>
Date: Fri, 14 Nov 2025 13:10:45 -0000
From: "tip-bot2 for Borislav Petkov (AMD)" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Andrew Cooper <andrew.cooper3@...rix.com>,
 "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 Zen5 model 0x44, stepping 0x1 minrev

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

Commit-ID:     dd14022a7ce96963aa923e35cf4bcc8c32f95840
Gitweb:        https://git.kernel.org/tip/dd14022a7ce96963aa923e35cf4bcc8c32f95840
Author:        Borislav Petkov (AMD) <bp@...en8.de>
AuthorDate:    Fri, 14 Nov 2025 14:01:14 +01:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Fri, 14 Nov 2025 14:04:49 +01:00

x86/microcode/AMD: Add Zen5 model 0x44, stepping 0x1 minrev

Add the minimum Entrysign revision for that model+stepping to the list
of minimum revisions.

Fixes: 50cef76d5cb0 ("x86/microcode/AMD: Load only SHA256-checksummed patches")
Reported-by: Andrew Cooper <andrew.cooper3@...rix.com>
Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Cc: <stable@...nel.org>
Link: https://lore.kernel.org/r/e94dd76b-4911-482f-8500-5c848a3df026@citrix.com
---
 arch/x86/kernel/cpu/microcode/amd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index dc82153..a881bf4 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -224,6 +224,7 @@ static bool need_sha_check(u32 cur_rev)
 	case 0xb1010: return cur_rev <= 0xb101046; break;
 	case 0xb2040: return cur_rev <= 0xb204031; break;
 	case 0xb4040: return cur_rev <= 0xb404031; break;
+	case 0xb4041: return cur_rev <= 0xb404101; break;
 	case 0xb6000: return cur_rev <= 0xb600031; break;
 	case 0xb6080: return cur_rev <= 0xb608031; break;
 	case 0xb7000: return cur_rev <= 0xb700031; break;