From: Andi Kleen <ak@linux.intel.com>
Date: Mon, 27 Apr 2009 16:42:48 +0000 (+0200)
Subject: x86, mce: port K7 bank 0 quirk to 64bit mce code
X-Git-Tag: Ubuntu-5.4-5.4.0-11.14~30164^2~58
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=2e6f694fde0a7158590e121962ca2e3c06633528;p=mirror_ubuntu-focal-kernel.git

x86, mce: port K7 bank 0 quirk to 64bit mce code

Various K7 have broken bank 0s. Don't enable it by default

Port from the 32bit code.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 1dcd3be03328..1336280edcc2 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -650,6 +650,12 @@ static void mce_cpu_quirks(struct cpuinfo_x86 *c)
 			 */
 			mce_bootlog = 0;
 		}
+		/*
+		 * Various K7s with broken bank 0 around. Always disable
+		 * by default.
+		 */
+		 if (c->x86 == 6)
+			bank[0] = 0;
 	}
 
 	if (c->x86_vendor == X86_VENDOR_INTEL) {