[PATCH V16 10/11] trace, ras: add ARM processor error trace event

[Tyler Baicar]

Currently there are trace events for the various RAS
errors with the exception of ARM processor type errors.
Add a new trace event for such errors so that the user
will know when they occur. These trace events are
consistent with the ARM processor error section type
defined in UEFI 2.6 spec section N.2.4.4.

Signed-off-by: Tyler Baicar <tbaicar at codeaurora.org>
Acked-by: Steven Rostedt <rostedt at goodmis.org>
Reviewed-by: Xie XiuQi <xiexiuqi at huawei.com>
---
 drivers/acpi/apei/ghes.c    |  6 +++++-
 drivers/firmware/efi/cper.c |  1 +
 drivers/ras/ras.c           |  6 ++++++
 include/linux/ras.h         |  3 +++
 include/ras/ras_event.h     | 45 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 1106722..2dddb3b 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -518,7 +518,11 @@ static void ghes_do_proc(struct ghes *ghes,
 
 		}
 #endif
-		else {
+		else if (!uuid_le_cmp(sec_type, CPER_SEC_PROC_ARM)) {
+			struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
+
+			call_arm_trace_event(err);
+		} else {
 			void *err = acpi_hest_get_payload(gdata);
 
 			call_non_standard_trace_event(&sec_type, fru_id,
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index d5a5855..48a8f69 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -35,6 +35,7 @@
 #include <linux/printk.h>
 #include <linux/bcd.h>
 #include <acpi/ghes.h>
+#include <ras/ras_event.h>
 
 #define INDENT_SP	" "
 
diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c
index 57363be..8655ef4 100644
--- a/drivers/ras/ras.c
+++ b/drivers/ras/ras.c
@@ -20,6 +20,11 @@ void call_non_standard_trace_event(const uuid_le *sec_type,
 	trace_non_standard_event(sec_type, fru_id, fru_text, sev, err, len);
 }
 
+void call_arm_trace_event(struct cper_sec_proc_arm *err)
+{
+	trace_arm_event(err);
+}
+
 static int __init ras_init(void)
 {
 	int rc = 0;
@@ -36,3 +41,4 @@ static int __init ras_init(void)
 #endif
 EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
 EXPORT_TRACEPOINT_SYMBOL_GPL(non_standard_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(arm_event);
diff --git a/include/linux/ras.h b/include/linux/ras.h
index 7d397a1..988e3ac 100644
--- a/include/linux/ras.h
+++ b/include/linux/ras.h
@@ -2,6 +2,7 @@
 #define __RAS_H__
 
 #include <linux/uuid.h>
+#include <linux/cper.h>
 
 #ifdef CONFIG_DEBUG_FS
 int ras_userspace_consumers(void);
@@ -17,10 +18,12 @@
 void call_non_standard_trace_event(const uuid_le *sec_type,
 		 const uuid_le *fru_id, const char *fru_text, const u8 sev,
 		 const u8 *err, const u32 len);
+void call_arm_trace_event(struct cper_sec_proc_arm *err);
 #else
 static void call_non_standard_trace_event(const uuid_le *sec_type,
 		 const uuid_le *fru_id, const char *fru_text, const u8 sev,
 		 const u8 *err, const u32 len) { return; }
+static void call_arm_trace_event(struct cper_sec_proc_arm *err) { return; }
 #endif
 
 #endif
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 4f79ba9..429f46f 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -162,6 +162,51 @@
 );
 
 /*
+ * ARM Processor Events Report
+ *
+ * This event is generated when hardware detects an ARM processor error
+ * has occurred. UEFI 2.6 spec section N.2.4.4.
+ */
+TRACE_EVENT(arm_event,
+
+	TP_PROTO(const struct cper_sec_proc_arm *proc),
+
+	TP_ARGS(proc),
+
+	TP_STRUCT__entry(
+		__field(u64, mpidr)
+		__field(u64, midr)
+		__field(u32, running_state)
+		__field(u32, psci_state)
+		__field(u8, affinity)
+	),
+
+	TP_fast_assign(
+		if (proc->validation_bits & CPER_ARM_VALID_AFFINITY_LEVEL)
+			__entry->affinity = proc->affinity_level;
+		else
+			__entry->affinity = ~0;
+		if (proc->validation_bits & CPER_ARM_VALID_MPIDR)
+			__entry->mpidr = proc->mpidr;
+		else
+			__entry->mpidr = 0ULL;
+		__entry->midr = proc->midr;
+		if (proc->validation_bits & CPER_ARM_VALID_RUNNING_STATE) {
+			__entry->running_state = proc->running_state;
+			__entry->psci_state = proc->psci_state;
+		} else {
+			__entry->running_state = ~0;
+			__entry->psci_state = ~0;
+		}
+	),
+
+	TP_printk("affinity level: %d; MPIDR: %016llx; MIDR: %016llx; "
+		  "running state: %d; PSCI state: %d",
+		  __entry->affinity, __entry->mpidr, __entry->midr,
+		  __entry->running_state, __entry->psci_state)
+);
+
+/*
  * Non-Standard Section Report
  *
  * This event is generated when hardware detected a hardware
-- 
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