linux-kernel - [PATCH] x86/mce, edac/mce_amd: Print PPIN in machine check records

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Date:   Tue, 23 Jun 2020 08:00:59 -0500
From:   Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
To:     Smita.KoralahalliChannabasappa@....com, Yazen.Ghannam@....com
Cc:     Borislav Petkov <bp@...en8.de>, Tony Luck <tony.luck@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        James Morse <james.morse@....com>,
        Robert Richter <rrichter@...vell.com>,
        Yazen Ghannam <yazen.ghannam@....com>,
        Wei Huang <wei.huang2@....com>, x86@...nel.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/mce, edac/mce_amd: Print PPIN in machine check records

For AMD processors that support Protected Processor Identification
Number (PPIN), the PPIN information is included in machine check records.
If present, print it along with other decoded MCA information.

Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: James Morse <james.morse@....com>
Cc: Robert Richter <rrichter@...vell.com>
Cc: Yazen Ghannam <yazen.ghannam@....com>
Cc: Wei Huang <wei.huang2@....com>
Cc: x86@...nel.org
Cc: linux-edac@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 arch/x86/kernel/cpu/mce/core.c | 2 ++
 drivers/edac/mce_amd.c         | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index ce9120c4f740..0865349502d5 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -244,6 +244,8 @@ static void __print_mce(struct mce *m)
 		pr_cont("ADDR %llx ", m->addr);
 	if (m->misc)
 		pr_cont("MISC %llx ", m->misc);
+	if (m->ppin)
+		pr_cont("PPIN %llx ", m->ppin);
 
 	if (mce_flags.smca) {
 		if (m->synd)
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 2b5401db56ad..325aedf46ff2 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -1094,6 +1094,9 @@ amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
 	if (m->status & MCI_STATUS_ADDRV)
 		pr_emerg(HW_ERR "Error Addr: 0x%016llx\n", m->addr);
 
+	if (m->ppin)
+		pr_emerg(HW_ERR "PPIN: 0x%016llx\n", m->ppin);
+
 	if (boot_cpu_has(X86_FEATURE_SMCA)) {
 		pr_emerg(HW_ERR "IPID: 0x%016llx", m->ipid);
 
-- 
2.17.1