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Subject[PATCH 6/6 V2] efi / ras: CCIX Agent internal error reporting
Date
The CCIX 1.0 Base specification defines an internal agent error,
for which the specific data present afte the header is vendor
defined.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
Changes since v1.
Drop printing of vendor data to kernel log.

drivers/acpi/apei/ghes.c | 4 ++
drivers/firmware/efi/cper-ccix.c | 12 ++++++
include/linux/cper.h | 29 +++++++++++++++
include/ras/ras_event.h | 64 ++++++++++++++++++++++++++++++++
4 files changed, 109 insertions(+)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 3cdca0c0f4ae..f7b3c4777df3 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -520,6 +520,10 @@ static void ghes_handle_ccix_per(struct acpi_hest_generic_data *gdata, int sev)
trace_ccix_link_error_event(payload, err_seq, sev,
ccix_link_err_ven_len_get(payload));
break;
+ case CCIX_AGENT_INTERNAL_ERROR:
+ trace_ccix_agent_error_event(payload, err_seq, sev,
+ ccix_agent_err_ven_len_get(payload));
+ break;
default:
/* Unknown error type */
pr_info("CCIX error of unknown or vendor defined type\n");
diff --git a/drivers/firmware/efi/cper-ccix.c b/drivers/firmware/efi/cper-ccix.c
index 5820a58ec382..b2ad55291dc4 100644
--- a/drivers/firmware/efi/cper-ccix.c
+++ b/drivers/firmware/efi/cper-ccix.c
@@ -584,6 +584,9 @@ int cper_print_ccix_per(const char *pfx, struct acpi_hest_generic_data *gdata)
return cper_ccix_port_err_details(pfx, gdata);
case CCIX_LINK_ERROR:
return cper_ccix_link_err_details(pfx, gdata);
+ case CCIX_AGENT_INTERNAL_ERROR:
+ /* Agent errors contain only vendor data, so nothing to do here */
+ return 0;
default:
/* Vendor defined so no formatting be done */
break;
@@ -803,3 +806,12 @@ const char *cper_ccix_link_err_unpack(struct trace_seq *p,

return ret;
}
+
+void cper_ccix_agent_err_pack(const struct cper_sec_ccix_agent_err *agent_record,
+ struct cper_ccix_agent_err_compact *cagent_err,
+ const u16 vendor_data_len,
+ u8 *vendor_data)
+{
+ cagent_err->validation_bits = agent_record->validation_bits;
+ memcpy(vendor_data, &agent_record->vendor_data[1], vendor_data_len);
+}
diff --git a/include/linux/cper.h b/include/linux/cper.h
index d35be55351e3..373c1d387a70 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -783,6 +783,30 @@ struct cper_ccix_link_err_compact {
__u8 credit_type;
};

+struct cper_sec_ccix_agent_err {
+ __u32 validation_bits;
+#define CCIX_AGENT_INTERNAL_ERR_VENDOR_DATA_VALID BIT(0)
+ __u32 vendor_data[];
+};
+
+struct cper_ccix_agent_err {
+ struct cper_sec_ccix_header header;
+ __u32 ccix_header[CCIX_PER_LOG_HEADER_DWS];
+ struct cper_sec_ccix_agent_err agent_record;
+};
+
+static inline u16 ccix_agent_err_ven_len_get(struct cper_ccix_agent_err *agent_err)
+{
+ if (agent_err->agent_record.validation_bits & CCIX_AGENT_INTERNAL_ERR_VENDOR_DATA_VALID)
+ return agent_err->agent_record.vendor_data[0] & 0xFFFF;
+ else
+ return 0;
+}
+
+struct cper_ccix_agent_err_compact {
+ __u32 validation_bits;
+};
+
/* Reset to default packing */
#pragma pack()

@@ -835,6 +859,11 @@ void cper_ccix_link_err_pack(const struct cper_sec_ccix_link_error *link_record,
const char *cper_ccix_link_err_unpack(struct trace_seq *p,
struct cper_ccix_link_err_compact *clink_err);

+void cper_ccix_agent_err_pack(const struct cper_sec_ccix_agent_err *agent_record,
+ struct cper_ccix_agent_err_compact *cagent_err,
+ const u16 vendor_data_len,
+ u8 *vendor_data);
+
struct acpi_hest_generic_data;
int cper_print_ccix_per(const char *pfx,
struct acpi_hest_generic_data *gdata);
diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
index bfe1c64b9db0..d09e5389a1e6 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -679,6 +679,70 @@ TRACE_EVENT(ccix_link_error_event,
)
);

+TRACE_EVENT(ccix_agent_error_event,
+ TP_PROTO(struct cper_ccix_agent_err *err,
+ u32 err_seq,
+ u8 sev, u16 ven_len),
+
+ TP_ARGS(err, err_seq, sev, ven_len),
+
+ TP_STRUCT__entry(
+ __field(u32, err_seq)
+ __field(u8, sev)
+ __field(u8, sevdetail)
+ __field(u8, source)
+ __field(u8, component)
+ __field(u64, pa)
+ __field(u8, pa_mask_lsb)
+ __field(u16, vendor_data_length)
+ __field_struct(struct cper_ccix_agent_err_compact, data)
+ __dynamic_array(u8, vendor_data, ven_len)
+ ),
+
+ TP_fast_assign(
+ __entry->err_seq = err_seq;
+
+ __entry->sev = sev;
+ __entry->sevdetail = FIELD_GET(CCIX_PER_LOG_DW1_SEV_UE_M |
+ CCIX_PER_LOG_DW1_SEV_NO_COMM_M |
+ CCIX_PER_LOG_DW1_SEV_DEGRADED_M |
+ CCIX_PER_LOG_DW1_SEV_DEFFERABLE_M,
+ err->ccix_header[1]);
+ if (err->header.validation_bits & 0x1)
+ __entry->source = err->header.source_id;
+ else
+ __entry->source = ~0;
+ __entry->component = FIELD_GET(CCIX_PER_LOG_DW1_COMP_TYPE_M,
+ err->ccix_header[1]);
+ if (err->ccix_header[1] & CCIX_PER_LOG_DW1_ADDR_VAL_M) {
+ __entry->pa = (u64)err->ccix_header[2] << 32 |
+ (err->ccix_header[3] & 0xfffffffc);
+ __entry->pa_mask_lsb = err->ccix_header[4] & 0xff;
+ } else {
+ __entry->pa = ~0ull;
+ __entry->pa_mask_lsb = ~0;
+ }
+ /* Do not store the vendor data header length */
+ __entry->vendor_data_length = ven_len ? ven_len - 4 : 0;
+ cper_ccix_agent_err_pack(&err->agent_record, &__entry->data,
+ __entry->vendor_data_length,
+ __get_dynamic_array(vendor_data));
+ ),
+
+ TP_printk("{%d} %s CCIX PER Agent Internal Error in %s SevUE:%d SevNoComm:%d SevDegraded:%d SevDeferred:%d physical addr: %016llx (mask: %x) vendor:%s",
+ __entry->err_seq,
+ cper_severity_str(__entry->sev),
+ cper_ccix_comp_type_str(__entry->component),
+ __entry->sevdetail & BIT(0) ? 1 : 0,
+ __entry->sevdetail & BIT(1) ? 1 : 0,
+ __entry->sevdetail & BIT(2) ? 1 : 0,
+ __entry->sevdetail & BIT(3) ? 1 : 0,
+ __entry->pa,
+ __entry->pa_mask_lsb,
+ __print_hex(__get_dynamic_array(vendor_data), __entry->vendor_data_length)
+ )
+);
+
/*
* memory-failure recovery action result event
*
--
2.20.1
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