x86/mce: Recognise machine check bank signature for data path error

Action required data path signature is defined in table 15-19 of SDM:

+-----------------------------------------------------------------------------+
| SRAR Error | Valid | OVER | UC | EN | MISCV | ADDRV | PCC | S | AR | MCACOD |
| Data Load  |     1 |    0 |  1 |  1 |     1 |     1 |   0 | 1 |  1 |  0x134 |
+-----------------------------------------------------------------------------+

Recognise this, and pass MCE_AR_SEVERITY code back to do_machine_check() if
we have the action handler configured (CONFIG_MEMORY_FAILURE=y)

Acked-by: Borislav Petkov <bp@amd64.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce-severity.c b/arch/x86/kernel/cpu/mcheck/mce-severity.c
index 7395d5f4272d..f6c92f99efa0 100644
--- a/arch/x86/kernel/cpu/mcheck/mce-severity.c
+++ b/arch/x86/kernel/cpu/mcheck/mce-severity.c
@@ -54,6 +54,7 @@ static struct severity {
 #define  MASK(x, y)     .mask = x, .result = y
 #define MCI_UC_S (MCI_STATUS_UC|MCI_STATUS_S)
 #define MCI_UC_SAR (MCI_STATUS_UC|MCI_STATUS_S|MCI_STATUS_AR)
+#define MCI_ADDR (MCI_STATUS_ADDRV|MCI_STATUS_MISCV)
 #define MCACOD 0xffff
 
         MCESEV(
@@ -102,11 +103,24 @@ static struct severity {
                 SER, BITCLR(MCI_STATUS_S)
                 ),
 
-        /* AR add known MCACODs here */
         MCESEV(
                 PANIC, "Action required with lost events",
                 SER, BITSET(MCI_STATUS_OVER|MCI_UC_SAR)
                 ),
+
+        /* known AR MCACODs: */
+#ifdef  CONFIG_MEMORY_FAILURE
+        MCESEV(
+                KEEP, "HT thread notices Action required: data load error",
+                SER, MASK(MCI_STATUS_OVER|MCI_UC_SAR|MCI_ADDR|MCACOD, MCI_UC_SAR|MCI_ADDR|0x0134),
+                MCGMASK(MCG_STATUS_EIPV, 0)
+                ),
+        MCESEV(
+                AR, "Action required: data load error",
+                SER, MASK(MCI_STATUS_OVER|MCI_UC_SAR|MCI_ADDR|MCACOD, MCI_UC_SAR|MCI_ADDR|0x0134),
+                USER
+                ),
+#endif
         MCESEV(
                 PANIC, "Action required: unknown MCACOD",
                 SER, MASK(MCI_STATUS_OVER|MCI_UC_SAR, MCI_UC_SAR)