[PATCH v4 17/17] trace, ras: add ARM RAS extension trace event

[Ruidong Tian <tianruidong@linux.alibaba.com>]

Add a trace event for hardware errors reported by the ARMv8
RAS extension registers. userspace app can monitor this
trace event and decode error information.

Signed-off-by: Ruidong Tian <tianruidong@linux.alibaba.com>
---
 drivers/ras/aest/aest-core.c |  6 +++
 drivers/ras/ras.c            |  3 ++
 include/ras/ras_event.h      | 71 ++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+)

diff --git a/drivers/ras/aest/aest-core.c b/drivers/ras/aest/aest-core.c
index 33e1f32c5892..9f06ac0b7c16 100644
--- a/drivers/ras/aest/aest-core.c
+++ b/drivers/ras/aest/aest-core.c
@@ -13,6 +13,8 @@
 #include <linux/genalloc.h>
 #include <linux/ras.h>
 
+#include <ras/ras_event.h>
+
 #include "aest.h"
 
 DEFINE_PER_CPU(struct aest_device, percpu_adev);
@@ -90,6 +92,10 @@ static void aest_print(struct aest_event *event)
 		pr_err("%s  ERR%dMISC3: 0x%llx\n", pfx_seq, index,
 		       regs->err_misc[3]);
 	}
+
+	trace_arm_ras_ext_event(event->type, event->id0, event->id1,
+				event->index, event->hid, &event->regs,
+				event->vendor_data, event->vendor_data_size);
 }
 
 static void aest_handle_memory_failure(u64 addr)
diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c
index 050b49466a18..3c0ba6c02d27 100644
--- a/drivers/ras/ras.c
+++ b/drivers/ras/ras.c
@@ -109,6 +109,9 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
 EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
 EXPORT_TRACEPOINT_SYMBOL_GPL(non_standard_event);
 EXPORT_TRACEPOINT_SYMBOL_GPL(arm_event);
+#ifdef CONFIG_ARM64_RAS_EXTN
+EXPORT_TRACEPOINT_SYMBOL_GPL(arm_ras_ext_event);
+#endif
 
 static int __init parse_ras_param(char *str)
 {
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index eaecc3c5f772..3a4a0c0e4dbe 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -377,6 +377,77 @@ TRACE_EVENT(aer_event,
 			"Not available")
 );
 #endif /* CONFIG_PCIEAER */
+
+/*
+ * ARM RAS Extension Events Report
+ *
+ * This event is generated when an error reported by the ARM RAS extension
+ * hardware is detected.
+ */
+
+#ifdef CONFIG_ARM64_RAS_EXTN
+#include <asm/ras.h>
+TRACE_EVENT(arm_ras_ext_event,
+
+	TP_PROTO(const u8 type,
+		 const u32 id0,
+		 const u32 id1,
+		 const u32 index,
+		 char *hid,
+		 struct ras_ext_regs *regs,
+		 const u8 *data,
+		 const u32 len),
+
+	TP_ARGS(type, id0, id1, index, hid, regs, data, len),
+
+	TP_STRUCT__entry(
+		__field(u8,  type)
+		__field(u32, id0)
+		__field(u32, id1)
+		__field(u32, index)
+		__field(char *, hid)
+		__field(u64, err_fr)
+		__field(u64, err_ctlr)
+		__field(u64, err_status)
+		__field(u64, err_addr)
+		__field(u64, err_misc0)
+		__field(u64, err_misc1)
+		__field(u64, err_misc2)
+		__field(u64, err_misc3)
+		__field(u32, len)
+		__dynamic_array(u8, buf, len)
+	),
+
+	TP_fast_assign(
+		__entry->type = type;
+		__entry->id0 = id0;
+		__entry->id1 = id1;
+		__entry->index = index;
+		__entry->hid = hid;
+		__entry->err_fr = regs->err_fr;
+		__entry->err_ctlr = regs->err_ctlr;
+		__entry->err_status = regs->err_status;
+		__entry->err_addr = regs->err_addr;
+		__entry->err_misc0 = regs->err_misc[0];
+		__entry->err_misc1 = regs->err_misc[1];
+		__entry->err_misc2 = regs->err_misc[2];
+		__entry->err_misc3 = regs->err_misc[3];
+		__entry->len = len;
+		memcpy(__get_dynamic_array(buf), data, len);
+	),
+
+	TP_printk("type: %d; id0: %d; id1: %d; index: %d; hid: %s; "
+		  "ERR_FR: %llx; ERR_CTLR: %llx; ERR_STATUS: %llx; "
+		  "ERR_ADDR: %llx; ERR_MISC0: %llx; ERR_MISC1: %llx; "
+		  "ERR_MISC2: %llx; ERR_MISC3: %llx; data len:%d; raw data:%s",
+		  __entry->type, __entry->id0, __entry->id1, __entry->index,
+		  __entry->hid, __entry->err_fr, __entry->err_ctlr,
+		  __entry->err_status, __entry->err_addr, __entry->err_misc0,
+		  __entry->err_misc1, __entry->err_misc2, __entry->err_misc3,
+		  __entry->len,
+		  __print_hex(__get_dynamic_array(buf), __entry->len))
+);
+#endif /* CONFIG_ARM64_RAS_EXTN */
 #endif /* _TRACE_HW_EVENT_MC_H */
 
 /* This part must be outside protection */
-- 
2.51.2.612.gdc70283dfc