Commit-ID: c7f54d21fb02e90042e6233b46716dcb244e70e6
Gitweb: http://git.kernel.org/tip/c7f54d21fb02e90042e6233b46716dcb244e70e6
Author: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>
AuthorDate: Fri, 30 Oct 2015 13:11:37 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Sun, 1 Nov 2015 11:26:13 +0100
x86/mce: Add a Scalable MCA vendor flags bit
Scalable MCA (SMCA) is a new feature in AMD Fam17h processors
which indicates presence of MCA extensions.
MCA extensions expands existing register space for the MCE banks
and also introduces a new MSR range to accommodate new banks.
Add the detection bit.
Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>
[ Reformat mce_vendor_flags definitions and save indentation levels. Improve comments. ]
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Ashok Raj <ashok.raj@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: linux-edac <linux-edac@xxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1446207099-24948-2-git-send-email-bp@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/include/asm/mce.h | 34 +++++++++++++++++++++-------------
arch/x86/kernel/cpu/mcheck/mce.c | 2 ++
2 files changed, 23 insertions(+), 13 deletions(-)
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 2dbc0bf..2ea4527 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -123,19 +123,27 @@ struct mca_config {
};
struct mce_vendor_flags {
- /*
- * overflow recovery cpuid bit indicates that overflow
- * conditions are not fatal
- */
- __u64 overflow_recov : 1,
-
- /*
- * SUCCOR stands for S/W UnCorrectable error COntainment
- * and Recovery. It indicates support for data poisoning
- * in HW and deferred error interrupts.
- */
- succor : 1,
- __reserved_0 : 62;
+ /*
+ * Indicates that overflow conditions are not fatal, when set.
+ */
+ __u64 overflow_recov : 1,
+
+ /*
+ * (AMD) SUCCOR stands for S/W UnCorrectable error COntainment and
+ * Recovery. It indicates support for data poisoning in HW and deferred
+ * error interrupts.
+ */
+ succor : 1,
+
+ /*
+ * (AMD) SMCA: This bit indicates support for Scalable MCA which expands
+ * the register space for each MCA bank and also increases number of
+ * banks. Also, to accommodate the new banks and registers, the MCA
+ * register space is moved to a new MSR range.
+ */
+ smca : 1,
+
+ __reserved_0 : 61;
};
extern struct mce_vendor_flags mce_flags;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 17b5ec6..3d631c4 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1605,6 +1605,8 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
mce_amd_feature_init(c);
mce_flags.overflow_recov = !!(ebx & BIT(0));
mce_flags.succor = !!(ebx & BIT(1));
+ mce_flags.smca = !!(ebx & BIT(3));
+
break;
}
--
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