powerpc/powernv/mce: Print additional information about MCE error.

Print more information about MCE error whether it is an hardware or
software error.

Some of the MCE errors can be easily categorized as hardware or
software errors e.g. UEs are due to hardware error, where as error
triggered due to invalid usage of tlbie is a pure software bug. But
not all the MCE errors can be easily categorize into either software
or hardware. There are errors like multihit errors which are usually
result of a software bug, but in some rare cases a hardware failure
can cause a multihit error. In past, we have seen case where after
replacing faulty chip, multihit errors stopped occurring. Same with
parity errors, which are usually due to faulty hardware but there are
chances where multihit can also cause an parity error. Such errors are
difficult to determine what really caused it. Hence this patch
classifies MCE errors into following four categorize:

  1. Hardware error:
  	UE and Link timeout failure errors.
  2. Probable hardware error (some chance of software cause)
  	SLB/ERAT/TLB Parity errors.
  3. Software error
  	Invalid tlbie form.
  4. Probable software error (some chance of hardware cause)
  	SLB/ERAT/TLB Multihit errors.

Sample output:

  MCE: CPU80: machine check (Warning) Guest SLB Multihit DAR: 000001001b6e0320 [Recovered]
  MCE: CPU80: PID: 24765 Comm: qemu-system-ppc Guest NIP: [00007fffa309dc60]
  MCE: CPU80: Probable Software error (some chance of hardware cause)

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

3 files changed, 86 insertions, 43 deletions

diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h
index d6dc75f9e9bb..23247a132ce8 100644
--- a/arch/powerpc/include/asm/mce.h
+++ b/arch/powerpc/include/asm/mce.h
@@ -56,6 +56,14 @@ enum MCE_ErrorType {
 	MCE_ERROR_TYPE_LINK = 7,
 };
 
+enum MCE_ErrorClass {
+	MCE_ECLASS_UNKNOWN = 0,
+	MCE_ECLASS_HARDWARE,
+	MCE_ECLASS_HARD_INDETERMINATE,
+	MCE_ECLASS_SOFTWARE,
+	MCE_ECLASS_SOFT_INDETERMINATE,
+};
+
 enum MCE_UeErrorType {
 	MCE_UE_ERROR_INDETERMINATE = 0,
 	MCE_UE_ERROR_IFETCH = 1,
@@ -115,6 +123,7 @@ struct machine_check_event {
 	enum MCE_Severity	severity:8;
 	enum MCE_Initiator	initiator:8;
 	enum MCE_ErrorType	error_type:8;
+	enum MCE_ErrorClass	error_class:8;
 	enum MCE_Disposition	disposition:8;
 	bool			sync_error;
 	u16			cpu;
@@ -195,6 +204,7 @@ struct mce_error_info {
 	} u;
 	enum MCE_Severity	severity:8;
 	enum MCE_Initiator	initiator:8;
+	enum MCE_ErrorClass	error_class:8;
 	bool			sync_error;
 };
 
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index 71d245a387ab..4581377cfc98 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -123,6 +123,7 @@ void save_mce_event(struct pt_regs *regs, long handled,
 	mce->initiator = mce_err->initiator;
 	mce->severity = mce_err->severity;
 	mce->sync_error = mce_err->sync_error;
+	mce->error_class = mce_err->error_class;
 
 	/*
 	 * Populate the mce error_type and type-specific error_type.
@@ -363,6 +364,13 @@ void machine_check_print_event_info(struct machine_check_event *evt,
 		"Store (timeout)",
 		"Page table walk Load/Store (timeout)",
 	};
+	static const char *mc_error_class[] = {
+		"Unknown",
+		"Hardware error",
+		"Probable Hardware error (some chance of software cause)",
+		"Software error",
+		"Probable Software error (some chance of hardware cause)",
+	};
 
 	/* Print things out */
 	if (evt->version != MCE_V1) {
@@ -487,6 +495,10 @@ void machine_check_print_event_info(struct machine_check_event *evt,
 		printk("%sMCE: CPU%d: NIP: [%016llx] %pS%s\n",
 			level, evt->cpu, evt->srr0, (void *)evt->srr0, pa_str);
 	}
+
+	subtype = evt->error_class < ARRAY_SIZE(mc_error_class) ?
+		mc_error_class[evt->error_class] : "Unknown";
+	printk("%sMCE: CPU%d: %s\n", level, evt->cpu, subtype);
 }
 EXPORT_SYMBOL_GPL(machine_check_print_event_info);
 
diff --git a/arch/powerpc/kernel/mce_power.c b/arch/powerpc/kernel/mce_power.c
index 6647a31b85b2..b5e876efe864 100644
--- a/arch/powerpc/kernel/mce_power.c
+++ b/arch/powerpc/kernel/mce_power.c
@@ -131,6 +131,7 @@ struct mce_ierror_table {
 	bool nip_valid; /* nip is a valid indicator of faulting address */
 	unsigned int error_type;
 	unsigned int error_subtype;
+	unsigned int error_class;
 	unsigned int initiator;
 	unsigned int severity;
 	bool sync_error;
@@ -138,99 +139,103 @@ struct mce_ierror_table {
 
 static const struct mce_ierror_table mce_p7_ierror_table[] = {
 { 0x00000000001c0000, 0x0000000000040000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000001c0000, 0x0000000000080000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000001c0000, 0x00000000000c0000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000001c0000, 0x0000000000100000, true,
   MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_INDETERMINATE, /* BOTH */
+  MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000001c0000, 0x0000000000140000, true,
-  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000001c0000, 0x0000000000180000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000001c0000, 0x00000000001c0000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0, 0, 0, 0, 0, 0, 0 } };
 
 static const struct mce_ierror_table mce_p8_ierror_table[] = {
 { 0x00000000081c0000, 0x0000000000040000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000000080000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x00000000000c0000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000100000, true,
-  MCE_ERROR_TYPE_ERAT,MCE_ERAT_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000140000, true,
-  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000180000, true,
   MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x00000000001c0000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008000000, true,
-  MCE_ERROR_TYPE_LINK,MCE_LINK_ERROR_IFETCH_TIMEOUT,
+  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_IFETCH_TIMEOUT, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008040000, true,
   MCE_ERROR_TYPE_LINK,MCE_LINK_ERROR_PAGE_TABLE_WALK_IFETCH_TIMEOUT,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0, 0, 0, 0, 0, 0, 0 } };
 
 static const struct mce_ierror_table mce_p9_ierror_table[] = {
 { 0x00000000081c0000, 0x0000000000040000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000000080000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x00000000000c0000, true,
-  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_SLB, MCE_SLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000100000, true,
-  MCE_ERROR_TYPE_ERAT,MCE_ERAT_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000140000, true,
-  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB, MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,  MCE_SEV_WARNING, true },
 { 0x00000000081c0000, 0x0000000000180000, true,
-  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH,
+  MCE_ERROR_TYPE_UE,  MCE_UE_ERROR_PAGE_TABLE_WALK_IFETCH, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x00000000001c0000, true,
-  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_IFETCH_FOREIGN,
+  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_IFETCH_FOREIGN, MCE_ECLASS_SOFTWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008000000, true,
-  MCE_ERROR_TYPE_LINK,MCE_LINK_ERROR_IFETCH_TIMEOUT,
+  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_IFETCH_TIMEOUT, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008040000, true,
   MCE_ERROR_TYPE_LINK,MCE_LINK_ERROR_PAGE_TABLE_WALK_IFETCH_TIMEOUT,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x00000000080c0000, true,
-  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_IFETCH,
+  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_IFETCH, MCE_ECLASS_SOFTWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008100000, true,
-  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_PAGE_TABLE_WALK_IFETCH,
+  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_PAGE_TABLE_WALK_IFETCH, MCE_ECLASS_SOFTWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0x00000000081c0000, 0x0000000008140000, false,
-  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_STORE,
+  MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_STORE, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,  MCE_SEV_FATAL, false }, /* ASYNC is fatal */
 { 0x00000000081c0000, 0x0000000008180000, false,
   MCE_ERROR_TYPE_LINK,MCE_LINK_ERROR_STORE_TIMEOUT,
   MCE_INITIATOR_CPU,  MCE_SEV_FATAL, false }, /* ASYNC is fatal */
-{ 0x00000000081c0000, 0x00000000081c0000, true,
+{ 0x00000000081c0000, 0x00000000081c0000, true, MCE_ECLASS_HARDWARE,
   MCE_ERROR_TYPE_RA,  MCE_RA_ERROR_PAGE_TABLE_WALK_IFETCH_FOREIGN,
   MCE_INITIATOR_CPU,  MCE_SEV_SEVERE, true },
 { 0, 0, 0, 0, 0, 0, 0 } };
@@ -240,6 +245,7 @@ struct mce_derror_table {
 	bool dar_valid; /* dar is a valid indicator of faulting address */
 	unsigned int error_type;
 	unsigned int error_subtype;
+	unsigned int error_class;
 	unsigned int initiator;
 	unsigned int severity;
 	bool sync_error;
@@ -247,97 +253,108 @@ struct mce_derror_table {
 
 static const struct mce_derror_table mce_p7_derror_table[] = {
 { 0x00008000, false,
-  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE,
+  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00004000, true,
   MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000800, true,
-  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000400, true,
-  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000080, true,
-  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_MULTIHIT,	/* Before PARITY */
+  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000100, true,
-  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000040, true,
   MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_INDETERMINATE, /* BOTH */
+  MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0, false, 0, 0, 0, 0, 0 } };
 
 static const struct mce_derror_table mce_p8_derror_table[] = {
 { 0x00008000, false,
-  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE,
+  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00004000, true,
   MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00002000, true,
-  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_LOAD_TIMEOUT,
+  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_LOAD_TIMEOUT, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00001000, true,
   MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_PAGE_TABLE_WALK_LOAD_STORE_TIMEOUT,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000800, true,
-  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000400, true,
-  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000200, true,
   MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, /* SECONDARY ERAT */
+  MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000080, true,
   MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_MULTIHIT,	/* Before PARITY */
+  MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000100, true,
-  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0, false, 0, 0, 0, 0, 0 } };
 
 static const struct mce_derror_table mce_p9_derror_table[] = {
 { 0x00008000, false,
-  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE,
+  MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_LOAD_STORE, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00004000, true,
   MCE_ERROR_TYPE_UE,   MCE_UE_ERROR_PAGE_TABLE_WALK_LOAD_STORE,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00002000, true,
-  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_LOAD_TIMEOUT,
+  MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_LOAD_TIMEOUT, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00001000, true,
   MCE_ERROR_TYPE_LINK, MCE_LINK_ERROR_PAGE_TABLE_WALK_LOAD_STORE_TIMEOUT,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000800, true,
-  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_ERAT, MCE_ERAT_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000400, true,
-  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT,
+  MCE_ERROR_TYPE_TLB,  MCE_TLB_ERROR_MULTIHIT, MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000200, false,
-  MCE_ERROR_TYPE_USER, MCE_USER_ERROR_TLBIE,
+  MCE_ERROR_TYPE_USER, MCE_USER_ERROR_TLBIE, MCE_ECLASS_SOFTWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000080, true,
   MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_MULTIHIT,	/* Before PARITY */
+  MCE_ECLASS_SOFT_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_WARNING, true },
 { 0x00000100, true,
-  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY,
+  MCE_ERROR_TYPE_SLB,  MCE_SLB_ERROR_PARITY, MCE_ECLASS_HARD_INDETERMINATE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000040, true,
-  MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_LOAD,
+  MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_LOAD, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000020, false,
   MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_PAGE_TABLE_WALK_LOAD_STORE,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000010, false,
   MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_PAGE_TABLE_WALK_LOAD_STORE_FOREIGN,
+  MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0x00000008, false,
-  MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_LOAD_STORE_FOREIGN,
+  MCE_ERROR_TYPE_RA,   MCE_RA_ERROR_LOAD_STORE_FOREIGN, MCE_ECLASS_HARDWARE,
   MCE_INITIATOR_CPU,   MCE_SEV_SEVERE, true },
 { 0, false, 0, 0, 0, 0, 0 } };
 
@@ -406,6 +423,7 @@ static int mce_handle_ierror(struct pt_regs *regs,
 
 		/* now fill in mce_error_info */
 		mce_err->error_type = table[i].error_type;
+		mce_err->error_class = table[i].error_class;
 		switch (table[i].error_type) {
 		case MCE_ERROR_TYPE_UE:
 			mce_err->u.ue_error_type = table[i].error_subtype;
@@ -451,6 +469,7 @@ static int mce_handle_ierror(struct pt_regs *regs,
 	}
 
 	mce_err->error_type = MCE_ERROR_TYPE_UNKNOWN;
+	mce_err->error_class = MCE_ECLASS_UNKNOWN;
 	mce_err->severity = MCE_SEV_SEVERE;
 	mce_err->initiator = MCE_INITIATOR_CPU;
 	mce_err->sync_error = true;
@@ -500,6 +519,7 @@ static int mce_handle_derror(struct pt_regs *regs,
 
 		/* now fill in mce_error_info */
 		mce_err->error_type = table[i].error_type;
+		mce_err->error_class = table[i].error_class;
 		switch (table[i].error_type) {
 		case MCE_ERROR_TYPE_UE:
 			mce_err->u.ue_error_type = table[i].error_subtype;
@@ -544,6 +564,7 @@ static int mce_handle_derror(struct pt_regs *regs,
 		return handled;
 
 	mce_err->error_type = MCE_ERROR_TYPE_UNKNOWN;
+	mce_err->error_class = MCE_ECLASS_UNKNOWN;
 	mce_err->severity = MCE_SEV_SEVERE;
 	mce_err->initiator = MCE_INITIATOR_CPU;
 	mce_err->sync_error = true;