From 0eebe2610a5fa37d65926c1d02ce47d2b9f01eb5 Mon Sep 17 00:00:00 2001
From: Tyler Baicar <tbaicar@codeaurora.org>
Date: Wed, 21 Jun 2017 12:17:13 -0600
Subject: [PATCH 28/32] trace, ras: add ARM processor error trace event

Git-commit: e9279e83ad1f4b5af541a522a81888f828210b40
Patch-mainline: v4.13-rc1
References: fate#323583

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@codeaurora.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.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 ab36ad628c68..5073d035bb6e 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -517,7 +517,11 @@ static void ghes_do_proc(struct ghes *ghes,
 
 		}
 #endif
-		else {
+		else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
+			struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
+
+			log_arm_hw_error(err);
+		} else {
 			void *err = acpi_hest_get_payload(gdata);
 
 			log_non_standard_event(sec_type, fru_id, fru_text,
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index d5a5855906d6..48a8f69da42a 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 e87fd9e32ee2..39701a5c3f49 100644
--- a/drivers/ras/ras.c
+++ b/drivers/ras/ras.c
@@ -20,6 +20,11 @@ void log_non_standard_event(const uuid_le *sec_type, const uuid_le *fru_id,
 	trace_non_standard_event(sec_type, fru_id, fru_text, sev, err, len);
 }
 
+void log_arm_hw_error(struct cper_sec_proc_arm *err)
+{
+	trace_arm_event(err);
+}
+
 static int __init ras_init(void)
 {
 	int rc = 0;
@@ -36,6 +41,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
 #endif
 EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
 EXPORT_TRACEPOINT_SYMBOL_GPL(non_standard_event);
+EXPORT_TRACEPOINT_SYMBOL_GPL(arm_event);
 
 int __init parse_ras_param(char *str)
 {
diff --git a/include/linux/ras.h b/include/linux/ras.h
index 62fac3042dce..7d61863ff265 100644
--- a/include/linux/ras.h
+++ b/include/linux/ras.h
@@ -3,6 +3,7 @@
 
 #include <asm/errno.h>
 #include <linux/uuid.h>
+#include <linux/cper.h>
 
 #ifdef CONFIG_DEBUG_FS
 int ras_userspace_consumers(void);
@@ -27,11 +28,13 @@ static inline int cec_add_elem(u64 pfn)		{ return -ENODEV; }
 void log_non_standard_event(const guid_t *sec_type,
 			    const guid_t *fru_id, const char *fru_text,
 			    const u8 sev, const u8 *err, const u32 len);
+void log_arm_hw_error(struct cper_sec_proc_arm *err);
 #else
 static void log_non_standard_event(const guid_t *sec_type,
 				   const guid_t *fru_id, const char *fru_text,
 				   const u8 sev, const u8 *err,
 				   const u32 len) { return; }
+static void log_arm_hw_error(struct cper_sec_proc_arm *err) { return; }
 #endif
 
 #endif /* __RAS_H__ */
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index 4f79ba94fa6b..429f46fb61e4 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -162,6 +162,51 @@ TRACE_EVENT(mc_event,
 );
 
 /*
+ * 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
-- 
2.11.0