linux-kernel - [PATCH 5.14 792/849] x86/mce: Add errata workaround for Skylake SKX37

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Message-Id: <20211115165447.037723800@linuxfoundation.org>
Date:   Mon, 15 Nov 2021 18:04:35 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dave Jones <davej@...emonkey.org.uk>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>
Subject: [PATCH 5.14 792/849] x86/mce: Add errata workaround for Skylake SKX37

From: Dave Jones <davej@...emonkey.org.uk>

commit e629fc1407a63dbb748f828f9814463ffc2a0af0 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/kernel/cpu/mce/intel.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- 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;