[PATCH 3/5] x86/mce: Add new "handled" field to "struct mce"

[Tony Luck]

There can be many different subsystems register on the mce handler
chain. Add a new bitmask field and define values so that handlers
can indicate whether they took any action to log or otherwise
handle an error.

The default handler at the end of the chain can use this information
to decide whether to print to the console log.

Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
 arch/x86/include/uapi/asm/mce.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/include/uapi/asm/mce.h b/arch/x86/include/uapi/asm/mce.h
index 955c2a2e1cf9..99ca07f7b078 100644
--- a/arch/x86/include/uapi/asm/mce.h
+++ b/arch/x86/include/uapi/asm/mce.h
@@ -35,8 +35,17 @@ struct mce {
 	__u64 ipid;		/* MCA_IPID MSR: only valid on SMCA systems */
 	__u64 ppin;		/* Protected Processor Inventory Number */
 	__u32 microcode;	/* Microcode revision */
+	__u32 handled;		/* Bitmap of logging/handling actions */
 };
 
+/* handled flag bits */
+#define	MCE_HANDLED_CEC		BIT(0)
+#define	MCE_HANDLED_UC		BIT(1)
+#define	MCE_HANDLED_EXTLOG	BIT(2)
+#define	MCE_HANDLED_NFIT	BIT(3)
+#define	MCE_HANDLED_EDAC	BIT(4)
+#define	MCE_HANDLED_MCELOG	BIT(5)
+
 #define MCE_GET_RECORD_LEN   _IOR('M', 1, int)
 #define MCE_GET_LOG_LEN      _IOR('M', 2, int)
 #define MCE_GETCLEAR_FLAGS   _IOR('M', 3, int)
-- 
2.21.1