linux-kernel - [PATCH] x86/CPU/AMD: Terminate the erratum_1386

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Message-ID: <20241126134722.480975-1-bigeasy@linutronix.de>
Date: Tue, 26 Nov 2024 14:47:22 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH] x86/CPU/AMD: Terminate the erratum_1386_microcode array.

The erratum_1386_microcode array requires an empty entry at the end.
Otherwise x86_match_cpu_with_stepping() will continue iterrate the array
after it ended.

Add an empty entry to erratum_1386_microcode to its end.

Fixes: 29ba89f189528 ("x86/CPU/AMD: Improve the erratum 1386 workaround")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 arch/x86/kernel/cpu/amd.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 823f44f7bc946..d8408aafeed98 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -798,6 +798,7 @@ static void init_amd_bd(struct cpuinfo_x86 *c)
 static const struct x86_cpu_desc erratum_1386_microcode[] = {
 	AMD_CPU_DESC(0x17,  0x1, 0x2, 0x0800126e),
 	AMD_CPU_DESC(0x17, 0x31, 0x0, 0x08301052),
+	{},
 };
 
 static void fix_erratum_1386(struct cpuinfo_x86 *c)
-- 
2.45.2