linux-kernel - [tip: x86/urgent] x86/mce: Add errata workaround for Skylake SKX37

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Message-ID: <163675098841.414.15295584691020015692.tip-bot2@tip-bot2>
Date:   Fri, 12 Nov 2021 21:03:08 -0000
From:   "tip-bot2 for Dave Jones" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Dave Jones <davej@...emonkey.org.uk>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>, <stable@...r.kernel.org>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] x86/mce: Add errata workaround for Skylake SKX37

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

Commit-ID:     e629fc1407a63dbb748f828f9814463ffc2a0af0
Gitweb:        https://git.kernel.org/tip/e629fc1407a63dbb748f828f9814463ffc2a0af0
Author:        Dave Jones <davej@...emonkey.org.uk>
AuthorDate:    Fri, 29 Oct 2021 16:57:59 -04:00
Committer:     Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Fri, 12 Nov 2021 11:43:35 -08:00

x86/mce: Add errata workaround for Skylake SKX37

Errata SKX37 is word-for-word identical to the other errata listed in
this workaround.   I happened to notice this after investigating a CMCI
storm on a Skylake host.  While I can't confirm this was the root cause,
spurious corrected errors does sound like a likely suspect.

Fixes: 2976908e4198 ("x86/mce: Do not log spurious corrected mce errors")
Signed-off-by: Dave Jones <davej@...emonkey.org.uk>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Tony Luck <tony.luck@...el.com>
Cc: <stable@...r.kernel.org>
Link: https://lkml.kernel.org/r/20211029205759.GA7385@codemonkey.org.uk
---
 arch/x86/kernel/cpu/mce/intel.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index acfd5d9..bb9a46a 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -547,12 +547,13 @@ bool intel_filter_mce(struct mce *m)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
 
-	/* MCE errata HSD131, HSM142, HSW131, BDM48, and HSM142 */
+	/* MCE errata HSD131, HSM142, HSW131, BDM48, HSM142 and SKX37 */
 	if ((c->x86 == 6) &&
 	    ((c->x86_model == INTEL_FAM6_HASWELL) ||
 	     (c->x86_model == INTEL_FAM6_HASWELL_L) ||
 	     (c->x86_model == INTEL_FAM6_BROADWELL) ||
-	     (c->x86_model == INTEL_FAM6_HASWELL_G)) &&
+	     (c->x86_model == INTEL_FAM6_HASWELL_G) ||
+	     (c->x86_model == INTEL_FAM6_SKYLAKE_X)) &&
 	    (m->bank == 0) &&
 	    ((m->status & 0xa0000000ffffffff) == 0x80000000000f0005))
 		return true;