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authorAravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>2015-05-06 13:58:55 +0200
committerBorislav Petkov <bp@suse.de>2015-05-06 20:34:31 +0200
commit7559e13fb4abe7880dfaf985d6a1630ca90a67ce (patch)
treec2bf92cf6fbce401385d7004b55438fa5faf063e /arch/x86/include/asm/mce.h
parentx86/mce/amd: Collect valid address before logging an error (diff)
downloadlinux-7559e13fb4abe7880dfaf985d6a1630ca90a67ce.tar.xz
linux-7559e13fb4abe7880dfaf985d6a1630ca90a67ce.zip
x86/mce: Add support for deferred errors on AMD
Deferred errors indicate error conditions that were not corrected, but those errors have not been consumed yet. They require no action from S/W (or action is optional). These errors provide info about a latent uncorrectable MCE that can occur when a poisoned data is consumed by the processor. Newer AMD processors can generate deferred errors and can be configured to generate APIC interrupts on such events. SUCCOR stands for S/W UnCorrectable error COntainment and Recovery. It indicates support for data poisoning in HW and deferred error interrupts. Add new bitfield to mce_vendor_flags for this. We use this to verify presence of deferred error interrupts before we enable them in mce_amd.c While at it, clarify comments in mce_vendor_flags to provide an indication of usages of the bitfields. Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> Cc: Tony Luck <tony.luck@intel.com> Cc: x86-ml <x86@kernel.org> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1430913538-1415-4-git-send-email-Aravind.Gopalakrishnan@amd.com [ beef up commit message, do CPUID(8000_0007) only once. ] Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'arch/x86/include/asm/mce.h')
-rw-r--r--arch/x86/include/asm/mce.h15
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 1f5a86d518db..407ced642ac1 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -117,8 +117,19 @@ struct mca_config {
};
struct mce_vendor_flags {
- __u64 overflow_recov : 1, /* cpuid_ebx(80000007) */
- __reserved_0 : 63;
+ /*
+ * 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;
};
extern struct mce_vendor_flags mce_flags;