[tip:ras/core] x86/mce: Add macros for the corrected error count bit field

[tip-bot for Qiuxu Zhuo]

Commit-ID:  e5276b1ffa97e3883802f40a5e3a167fe1cb1d20
Gitweb:     https://git.kernel.org/tip/e5276b1ffa97e3883802f40a5e3a167fe1cb1d20
Author:     Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
AuthorDate: Mon, 24 Sep 2018 17:03:43 -0700
Committer:  Borislav Petkov <bp@xxxxxxx>
CommitDate: Thu, 27 Sep 2018 16:08:18 +0200

x86/mce: Add macros for the corrected error count bit field

The bit field [52:38] of MCi_STATUS contains the corrected error count.
Add {*_SHIFT|*_MASK|*_CEC(c)} macros for it.

 [ bp: use GENMASK_ULL. ]

Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: Aristeu Rozanski <aris@xxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
Cc: linux-edac@xxxxxxxxxxxxxxx
Cc: x86@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20180925000343.GB5998@agluck-desk
---
 arch/x86/include/asm/mce.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 6f95047179eb..97d6969f9a8a 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -39,6 +39,9 @@
 #define MCI_STATUS_PCC		BIT_ULL(57)  /* processor context corrupt */
 #define MCI_STATUS_S		BIT_ULL(56)  /* Signaled machine check */
 #define MCI_STATUS_AR		BIT_ULL(55)  /* Action required */
+#define MCI_STATUS_CEC_SHIFT	38           /* Corrected Error Count */
+#define MCI_STATUS_CEC_MASK	GENMASK_ULL(52,38)
+#define MCI_STATUS_CEC(c)	(((c) & MCI_STATUS_CEC_MASK) >> MCI_STATUS_CEC_SHIFT)
 
 /* AMD-specific bits */
 #define MCI_STATUS_TCC		BIT_ULL(55)  /* Task context corrupt */