RE: [PATCH v2] arm64/ras: Update code to trace out more data for ARM processor

[Shiju Jose]

>-----Original Message-----
>From: linux-arm-kernel [mailto:linux-arm-kernel-bounces@xxxxxxxxxxxxxxxxxxx]
>On Behalf Of Jason Tian
>Sent: 05 February 2021 02:22
>To: linux-kernel@xxxxxxxxxxxxxxx; linux-edac@xxxxxxxxxxxxxxx; linux-arm-
>kernel@xxxxxxxxxxxxxxxxxxx; james.morse@xxxxxxx;
>baicar@xxxxxxxxxxxxxxxxxxxxxx
>Cc: zwang@xxxxxxxxxxxxxxxxxxx; jason@xxxxxxxxxxxxxxxxxxxxxx
>Subject: [PATCH v2] arm64/ras: Update code to trace out more data for ARM
>processor
>
>The original arm_event trace code only traces out ARM processor error
>information data. According to UEFI_2_8_A_Feb14 specification chapter
>N2.4.4, the ARM processor error section includes several ARM processor
>error information, several ARM processor context information and several
>vendor specific error information structures.
>
>Add code to trace out all ARM processor context information and vendor
>specific error information with raw hex format.
>
>Signed-off-by: Jason Tian <jason@xxxxxxxxxxxxxxxxxxxxxx>
>---
> drivers/ras/ras.c       | 22 +++++++++++++++++++++-
> include/ras/ras_event.h | 41 +++++++++++++++++++++++++++++++++++---
>---
> 2 files changed, 56 insertions(+), 7 deletions(-)
>

Tested-by: Shiju Jose <shiju.jose@xxxxxxxxxx>

>diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c index
>95540ea8dd9d..6f3269da9476 100644
>--- a/drivers/ras/ras.c
>+++ b/drivers/ras/ras.c
>@@ -23,7 +23,27 @@ void log_non_standard_event(const guid_t
>*sec_type, const guid_t *fru_id,
>
> void log_arm_hw_error(struct cper_sec_proc_arm *err)  {
>-	trace_arm_event(err);
>+	u32 pei_len;
>+	u32 ctx_len;
>+	u32 vsei_len;
>+	u8 *pei_err;
>+	u8 *ctx_err;
>+	u8 *ven_err_data;
>+
>+	pei_len = sizeof(struct cper_arm_err_info) * err->err_info_num;
>+	pei_err = (u8 *) err + sizeof(struct cper_sec_proc_arm);
>+
>+	ctx_len = sizeof(struct cper_arm_ctx_info) * err->context_info_num;
>+	ctx_err = pei_err + sizeof(struct cper_arm_err_info) *
>+		err->err_info_num;
>+
>+	vsei_len = err->section_length - (sizeof(struct cper_sec_proc_arm) +
>+					  pei_len + ctx_len);
>+	ven_err_data = ctx_err + sizeof(struct cper_arm_ctx_info) *
>+					  err->context_info_num;
>+
>+	trace_arm_event(err, pei_err, pei_len, ctx_err, ctx_len,
>+			ven_err_data, vsei_len);
> }
>
> static int __init ras_init(void)
>diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h index
>0bdbc0d17d2f..fd9201214be8 100644
>--- a/include/ras/ras_event.h
>+++ b/include/ras/ras_event.h
>@@ -168,11 +168,22 @@ TRACE_EVENT(mc_event,
>  * This event is generated when hardware detects an ARM processor error
>  * has occurred. UEFI 2.6 spec section N.2.4.4.
>  */
>+ #define APEIL "ARM Processor Err Info data len"
>+ #define APEID "ARM Processor Err Info raw data"
>+ #define APECIL "ARM Processor Err Context Info data len"
>+ #define APECID "ARM Processor Err Context Info raw data"
>+ #define VSEIL "Vendor Specific Err Info data len"
>+ #define VSEID "Vendor Specific Err Info raw data"
> TRACE_EVENT(arm_event,
>
>-	TP_PROTO(const struct cper_sec_proc_arm *proc),
>+	TP_PROTO(const struct cper_sec_proc_arm *proc, const u8 *pei_err,
>+		const u32 pei_len,
>+		const u8 *ctx_err,
>+		const u32 ctx_len,
>+		const u8 *oem,
>+		const u32 oem_len),
>
>-	TP_ARGS(proc),
>+	TP_ARGS(proc, pei_err, pei_len, ctx_err, ctx_len, oem, oem_len),
>
> 	TP_STRUCT__entry(
> 		__field(u64, mpidr)
>@@ -180,6 +191,12 @@ TRACE_EVENT(arm_event,
> 		__field(u32, running_state)
> 		__field(u32, psci_state)
> 		__field(u8, affinity)
>+		__field(u32, pei_len)
>+		__dynamic_array(u8, buf, pei_len)
>+		__field(u32, ctx_len)
>+		__dynamic_array(u8, buf1, ctx_len)
>+		__field(u32, oem_len)
>+		__dynamic_array(u8, buf2, oem_len)
> 	),
>
> 	TP_fast_assign(
>@@ -199,12 +216,24 @@ TRACE_EVENT(arm_event,
> 			__entry->running_state = ~0;
> 			__entry->psci_state = ~0;
> 		}
>+		__entry->pei_len = pei_len;
>+		memcpy(__get_dynamic_array(buf), pei_err, pei_len);
>+		__entry->ctx_len = ctx_len;
>+		memcpy(__get_dynamic_array(buf1), ctx_err, ctx_len);
>+		__entry->oem_len = oem_len;
>+		memcpy(__get_dynamic_array(buf2), oem, oem_len);
> 	),
>
>-	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)
>+	TP_printk("affinity level: %d; MPIDR: %016llx; MIDR: %016llx;
>running state: %d; "
>+		"PSCI state: %d; %s: %d; %s: %s; %s: %d; %s: %s; %s: %d; %s:
>%s",
>+		__entry->affinity, __entry->mpidr, __entry->midr,
>+		__entry->running_state, __entry->psci_state,
>+		APEIL, __entry->pei_len, APEID,
>+		__print_hex(__get_dynamic_array(buf), __entry->pei_len),
>+		APECIL, __entry->ctx_len, APECID,
>+		__print_hex(__get_dynamic_array(buf1), __entry->ctx_len),
>+		VSEIL, __entry->oem_len, VSEID,
>+		__print_hex(__get_dynamic_array(buf2), __entry-
>>oem_len))
> );
>
> /*
>--
>2.25.1
>
>
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Thanks,
Shiju