[PATCH 12/15] x86/mce, EDAC/mce_amd: Print MCA_SYND and MCA_IPID during MCE on SMCA systems

[Borislav Petkov]

From: Yazen Ghannam <Yazen.Ghannam@xxxxxxx>

The MCA_SYND and MCA_IPID registers contain valuable information and
should be included in MCE output. The MCA_SYND register contains
syndrome and other error information, and the MCA_IPID register will
uniquely identify the MCA bank's type without having to rely on system
software.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@xxxxxxx>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: linux-edac <linux-edac@xxxxxxxxxxxxxxx>
Cc: x86-ml <x86@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1472680624-34221-2-git-send-email-Yazen.Ghannam@xxxxxxx
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 7 +++++++
 drivers/edac/mce_amd.c           | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 84cb9b5859e2..ae1f47772d4f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -292,6 +292,13 @@ static void print_mce(struct mce *m)
 	if (m->misc)
 		pr_cont("MISC %llx ", m->misc);
 
+	if (mce_flags.smca) {
+		if (m->synd)
+			pr_cont("SYND %llx ", m->synd);
+		if (m->ipid)
+			pr_cont("IPID %llx ", m->ipid);
+	}
+
 	pr_cont("\n");
 	/*
 	 * Note this output is parsed by external tools and old fields
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index 99b3bf3f4182..e8855a4f92d9 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -984,6 +984,8 @@ int amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
 		if (m->status & MCI_STATUS_SYNDV)
 			pr_cont(", Syndrome: 0x%016llx", m->synd);
 
+		pr_cont(", IPID: 0x%016llx", m->ipid);
+
 		pr_cont("\n");
 
 		decode_smca_errors(m);
-- 
2.10.0