x86/mce: Add the missing memory error check on AMD

We simply need to look at the extended error code when detecting
whether the error is of type memory.

Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1448350880-5573-4-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index fb8b1db..e00e85a 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -522,10 +522,10 @@ static bool memory_error(struct mce *m)
        struct cpuinfo_x86 *c = &boot_cpu_data;
 
        if (c->x86_vendor == X86_VENDOR_AMD) {
-               /*
-                * coming soon
-                */
-               return false;
+               /* ErrCodeExt[20:16] */
+               u8 xec = (m->status >> 16) & 0x1f;
+
+               return (xec == 0x0 || xec == 0x8);
        } else if (c->x86_vendor == X86_VENDOR_INTEL) {
                /*
                 * Intel SDM Volume 3B - 15.9.2 Compound Error Codes