linux-kernel - [PATCH 2/2] mcelog: Print the PPIN in machine check records when it is available

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Message-Id: <1479429348-1664-1-git-send-email-tony.luck@intel.com>
Date:   Thu, 17 Nov 2016 16:35:47 -0800
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Andi Kleen <andi.kleen@...el.com>
Cc:     Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
        Boris Petkov <bp@...e.de>
Subject: [PATCH 2/2] mcelog: Print the PPIN in machine check records when it is available

From: Tony Luck <tony.luck@...el.com>

Intel Xeons from Ivy Bridge onwards support a processor identification
number. Kernels v4.9 and higher include it in the "mce" record.

Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 mcelog.c | 3 +++
 mcelog.h | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/mcelog.c b/mcelog.c
index 7214a0d23f65..e79996db9b5b 100644
--- a/mcelog.c
+++ b/mcelog.c
@@ -441,6 +441,9 @@ static void dump_mce(struct mce *m, unsigned recordlen)
 	if (n > 0)
 		Wprintf("\n");
 
+	if (recordlen >= offsetof(struct mce, ppin) && m->ppin)
+		n += Wprintf("PPIN %llx\n", m->ppin);
+
 	if (recordlen >= offsetof(struct mce, cpuid) && m->cpuid) {
 		u32 fam, mod;
 		parse_cpuid(m->cpuid, &fam, &mod);
diff --git a/mcelog.h b/mcelog.h
index 254b3a092fba..9a54077e5474 100644
--- a/mcelog.h
+++ b/mcelog.h
@@ -31,6 +31,9 @@ struct mce {
 	__u32 socketid;	/* CPU socket ID */
 	__u32 apicid;	/* CPU initial apic ID */
 	__u64 mcgcap;	/* MCGCAP MSR: machine check capabilities of CPU */
+	__u64 synd;	/* MCA_SYND MSR: only valid on SMCA systems */
+	__u64 ipid;	/* MCA_IPID MSR: only valid on SMCA systems */
+	__u64 ppin;	/* Protected Processor Inventory Number */
 };
 
 #define X86_VENDOR_INTEL	0
-- 
2.7.4