linux-kernel - [PATCH 1/2] x86/mce/amd: Extend "Disable error thresholding bank 4" to more models

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Date:   Fri, 4 Jan 2019 09:37:18 +0000
From:   "S, Shirish" <Shirish.S@....com>
To:     unlisted-recipients:; (no To-header on input)
CC:     "S, Shirish" <Shirish.S@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] x86/mce/amd: Extend "Disable error thresholding bank 4"
 to more models

The below patch added this quirk only for the first generation of family
15 processors, over time its noticed that its required for later
generations too.

"575203b4747c x86, MCE, AMD: Disable error thresholding bank 4 on some
models"

This patch extends the quirk to make it applicable till 7th Generation,
so as to address the below warning at boot:

"[Firmware Bug]: cpu 0, invalid threshold interrupt offset ..."

Signed-off-by: Shirish S <shirish.s@....com>
---
 arch/x86/kernel/cpu/mce/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 672c722..051b536 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1616,7 +1616,7 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 		 * they're not supported there.
 		 */
 		if (c->x86 == 0x15 &&
-		    (c->x86_model >= 0x10 && c->x86_model <= 0x1f)) {
+		    (c->x86_model >= 0x10 && c->x86_model <= 0x7f)) {
 			int i;
 			u64 hwcr;
 			bool need_toggle;
-- 
2.7.4