linux-kernel - [PATCH] x86/mce: Enable PPIN for Knights Landing/Mill

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Date:   Thu, 13 Apr 2017 22:10:56 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     X86 ML <x86@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Tony Luck <tony.luck@...el.com>,
        linux-edac <linux-edac@...r.kernel.org>
Subject: [PATCH] x86/mce: Enable PPIN for Knights Landing/Mill

From: Piotr Luc <piotr.luc@...el.com>

Intel Xeon Phi processors (KNL and KNM) do support PPIN as well, so add
their CPUIDs to the whitelist of supported processors.

Signed-off-by: Piotr Luc <piotr.luc@...el.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: linux-edac <linux-edac@...r.kernel.org>
Cc: x86-ml <x86@...nel.org>
Link: http://lkml.kernel.org/r/20170408172004.8463-1-piotr.luc@intel.com
Signed-off-by: Borislav Petkov <bp@...e.de>
---
 arch/x86/kernel/cpu/mcheck/mce_intel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c
index 190b3e6cef4d..e84db79ef272 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c
@@ -481,6 +481,9 @@ static void intel_ppin_init(struct cpuinfo_x86 *c)
 	case INTEL_FAM6_BROADWELL_XEON_D:
 	case INTEL_FAM6_BROADWELL_X:
 	case INTEL_FAM6_SKYLAKE_X:
+	case INTEL_FAM6_XEON_PHI_KNL:
+	case INTEL_FAM6_XEON_PHI_KNM:
+
 		if (rdmsrl_safe(MSR_PPIN_CTL, &val))
 			return;
 
-- 
2.11.0