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Subject[PATCH 2/6 V2] efi / ras: CCIX Cache error reporting
Date
As CCIX Request Agents have fully cache coherent caches,
the CCIX 1.0 Base Specification defines detailed error
reporting for these caches.

A CCIX cache error is reported via a CPER record as defined in the
UEFI 2.8 specification. The PER log section is defined in the
CCIX 1.0 Base Specification.

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 | 156 +++++++++++++++++++++++++++++++
include/linux/cper.h | 57 +++++++++++
include/ras/ras_event.h | 66 +++++++++++++
4 files changed, 283 insertions(+)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 1ae36d836a77..5bda94e48b1b 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -504,6 +504,10 @@ static void ghes_handle_ccix_per(struct acpi_hest_generic_data *gdata, int sev)
trace_ccix_memory_error_event(payload, err_seq, sev,
ccix_mem_err_ven_len_get(payload));
break;
+ case CCIX_CACHE_ERROR:
+ trace_ccix_cache_error_event(payload, err_seq, sev,
+ ccix_cache_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 0be2630b2712..fa3fafac402b 100644
--- a/drivers/firmware/efi/cper-ccix.c
+++ b/drivers/firmware/efi/cper-ccix.c
@@ -273,6 +273,96 @@ static int cper_ccix_mem_err_details(const char *pfx,
return 0;
}

+static const char * const ccix_cache_type_strs[] = {
+ "Instruction Cache",
+ "Data Cache",
+ "Generic / Unified Cache",
+ "Snoop Filter Directory",
+};
+
+static const char *cper_ccix_cache_type_str(__u8 type)
+{
+ return type < ARRAY_SIZE(ccix_cache_type_strs) ?
+ ccix_cache_type_strs[type] : "Reserved";
+}
+
+static const char * const ccix_cache_err_type_strs[] = {
+ "Data",
+ "Tag",
+ "Timeout",
+ "Hang",
+ "Data Lost",
+ "Invalid Address",
+};
+
+const char *cper_ccix_cache_err_type_str(__u8 error_type)
+{
+ return error_type < ARRAY_SIZE(ccix_cache_err_type_strs) ?
+ ccix_cache_err_type_strs[error_type] : "Reserved";
+}
+
+static const char * const ccix_cache_err_op_strs[] = {
+ "Generic",
+ "Generic Read",
+ "Generic Write",
+ "Data Read",
+ "Data Write",
+ "Instruction Fetch",
+ "Prefetch",
+ "Eviction",
+ "Snooping",
+ "Snooped",
+ "Management / Command Error",
+};
+
+static const char *cper_ccix_cache_err_op_str(__u8 op)
+{
+ return op < ARRAY_SIZE(ccix_cache_err_op_strs) ?
+ ccix_cache_err_op_strs[op] : "Reserved";
+}
+
+static int cper_ccix_cache_err_details(const char *pfx,
+ struct acpi_hest_generic_data *gdata)
+{
+ struct cper_ccix_cache_error *full_cache_err;
+ struct cper_sec_ccix_cache_error *cache_err;
+
+ if (gdata->error_data_length < sizeof(*full_cache_err))
+ return -ENOSPC;
+
+ full_cache_err = acpi_hest_get_payload(gdata);
+
+ cache_err = &full_cache_err->cache_record;
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_TYPE_VALID)
+ printk("%s""Cache Type: %s\n", pfx,
+ cper_ccix_cache_type_str(cache_err->cache_type));
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_OP_VALID)
+ printk("%s""Operation: %s\n", pfx,
+ cper_ccix_cache_err_op_str(cache_err->op_type));
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_CACHE_ERR_TYPE_VALID)
+ printk("%s""Cache Error Type: %s\n", pfx,
+ cper_ccix_cache_err_type_str(cache_err->cache_error_type));
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_LEVEL_VALID)
+ printk("%s""Level: %d\n", pfx, cache_err->cache_level);
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_SET_VALID)
+ printk("%s""Set: %d\n", pfx, cache_err->set);
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_WAY_VALID)
+ printk("%s""Way: %d\n", pfx, cache_err->way);
+
+ if (cache_err->validation_bits & CCIX_CACHE_ERR_INSTANCE_ID_VALID)
+ printk("%s""Instance ID: %d\n", pfx, cache_err->instance);
+
+ /* Vendor data is not printed to the kernel log */
+
+ return 0;
+}
+
int cper_print_ccix_per(const char *pfx, struct acpi_hest_generic_data *gdata)
{
struct cper_sec_ccix_header *header = acpi_hest_get_payload(gdata);
@@ -334,9 +424,75 @@ int cper_print_ccix_per(const char *pfx, struct acpi_hest_generic_data *gdata)
switch (per_type) {
case CCIX_MEMORY_ERROR:
return cper_ccix_mem_err_details(pfx, gdata);
+ case CCIX_CACHE_ERROR:
+ return cper_ccix_cache_err_details(pfx, gdata);
default:
/* Vendor defined so no formatting be done */
break;
}
return 0;
}
+
+void cper_ccix_cache_err_pack(const struct cper_sec_ccix_cache_error *cache_record,
+ struct cper_ccix_cache_err_compact *ccache_err,
+ const u16 vendor_data_len,
+ u8 *vendor_data)
+{
+ ccache_err->validation_bits = cache_record->validation_bits;
+ ccache_err->set = cache_record->set;
+ ccache_err->way = cache_record->way;
+ ccache_err->cache_type = cache_record->cache_type;
+ ccache_err->op_type = cache_record->op_type;
+ ccache_err->cache_error_type = cache_record->cache_error_type;
+ ccache_err->cache_level = cache_record->cache_level;
+ ccache_err->instance = cache_record->instance;
+ memcpy(vendor_data, &cache_record->vendor_data[1], vendor_data_len);
+}
+
+static int cper_ccix_err_cache_location(struct cper_ccix_cache_err_compact *ccache_err,
+ char *msg)
+{
+ u32 len = CPER_REC_LEN - 1;
+ u32 n = 0;
+
+ if (!msg)
+ return 0;
+
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_CACHE_ERR_TYPE_VALID)
+ n += snprintf(msg + n, len, "Error: %s ",
+ cper_ccix_cache_err_type_str(ccache_err->cache_error_type));
+
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_TYPE_VALID)
+ n += snprintf(msg + n, len, "Type: %s ",
+ cper_ccix_cache_type_str(ccache_err->cache_type));
+
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_OP_VALID)
+ n += snprintf(msg + n, len, "Op: %s ",
+ cper_ccix_cache_err_op_str(ccache_err->op_type));
+
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_LEVEL_VALID)
+ n += snprintf(msg + n, len, "Level: %d ",
+ ccache_err->cache_level);
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_SET_VALID)
+ n += snprintf(msg + n, len, "Set: %d ", ccache_err->set);
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_WAY_VALID)
+ n += snprintf(msg + n, len, "Way: %d ", ccache_err->way);
+ if (ccache_err->validation_bits & CCIX_CACHE_ERR_INSTANCE_ID_VALID)
+ n += snprintf(msg + n, len, "Instance: %d ",
+ ccache_err->instance);
+
+ return n;
+}
+
+const char *cper_ccix_cache_err_unpack(struct trace_seq *p,
+ struct cper_ccix_cache_err_compact *ccache_err)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ if (cper_ccix_err_cache_location(ccache_err, rcd_decode_str))
+ trace_seq_printf(p, "%s", rcd_decode_str);
+
+ trace_seq_putc(p, '\0');
+
+ return ret;
+}
diff --git a/include/linux/cper.h b/include/linux/cper.h
index df7a34c3ba4f..eef254b8b8b7 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -627,6 +627,54 @@ struct cper_ccix_mem_err_compact {
__u8 fru;
};

+struct cper_sec_ccix_cache_error {
+ __u32 validation_bits;
+#define CCIX_CACHE_ERR_TYPE_VALID BIT(0)
+#define CCIX_CACHE_ERR_OP_VALID BIT(1)
+#define CCIX_CACHE_ERR_CACHE_ERR_TYPE_VALID BIT(2)
+#define CCIX_CACHE_ERR_LEVEL_VALID BIT(3)
+#define CCIX_CACHE_ERR_SET_VALID BIT(4)
+#define CCIX_CACHE_ERR_WAY_VALID BIT(5)
+#define CCIX_CACHE_ERR_INSTANCE_ID_VALID BIT(6)
+#define CCIX_CACHE_ERR_VENDOR_DATA_VALID BIT(7)
+ __u16 length; /* Includes vendor specific log info */
+ __u8 cache_type;
+ __u8 op_type;
+ __u8 cache_error_type;
+ __u8 cache_level;
+ __u32 set;
+ __u32 way;
+ __u8 instance;
+ __u8 reserved;
+ __u32 vendor_data[];
+};
+
+struct cper_ccix_cache_error {
+ struct cper_sec_ccix_header header;
+ __u32 ccix_header[CCIX_PER_LOG_HEADER_DWS];
+ struct cper_sec_ccix_cache_error cache_record;
+};
+
+static inline u16 ccix_cache_err_ven_len_get(struct cper_ccix_cache_error *cache_err)
+{
+ if (cache_err->cache_record.validation_bits &
+ CCIX_CACHE_ERR_VENDOR_DATA_VALID)
+ return cache_err->cache_record.vendor_data[0] & 0xFFFF;
+ else
+ return 0;
+}
+
+struct cper_ccix_cache_err_compact {
+ __u32 validation_bits;
+ __u32 set;
+ __u32 way;
+ __u8 cache_type;
+ __u8 op_type;
+ __u8 cache_error_type;
+ __u8 cache_level;
+ __u8 instance;
+};
+
/* Reset to default packing */
#pragma pack()

@@ -649,6 +697,15 @@ const char *cper_ccix_mem_err_unpack(struct trace_seq *p,
struct cper_ccix_mem_err_compact *cmem_err);
const char *cper_ccix_mem_err_type_str(unsigned int error_type);
const char *cper_ccix_comp_type_str(u8 comp_type);
+
+void cper_ccix_cache_err_pack(const struct cper_sec_ccix_cache_error *cache_record,
+ struct cper_ccix_cache_err_compact *ccache_err,
+ const u16 vendor_data_len,
+ u8 *vendor_data);
+const char *cper_ccix_cache_err_unpack(struct trace_seq *p,
+ struct cper_ccix_cache_err_compact *ccache_err);
+const char *cper_ccix_cache_err_type_str(__u8 error_type);
+
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 128728eaeef4..55f2c1900c54 100644
--- a/include/ras/ras_event.h
+++ b/include/ras/ras_event.h
@@ -415,6 +415,72 @@ TRACE_EVENT(ccix_memory_error_event,
)
);

+TRACE_EVENT(ccix_cache_error_event,
+ TP_PROTO(struct cper_ccix_cache_error *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_struct(struct cper_ccix_cache_err_compact, data)
+ __field(u16, vendor_data_length)
+ __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;
+ }
+
+ __entry->vendor_data_length = ven_len ? ven_len - 4 : 0;
+ cper_ccix_cache_err_pack(&err->cache_record, &__entry->data,
+ __entry->vendor_data_length,
+ __get_dynamic_array(vendor_data));
+ ),
+
+ TP_printk("{%d} %s CCIX PER Cache Error in %s SevUE:%d SevNoComm:%d SevDegraded:%d SevDeferred:%d physical addr: %016llx (mask: %x) %s 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,
+ cper_ccix_cache_err_unpack(p, &__entry->data),
+ __print_hex(__get_dynamic_array(vendor_data),
+ __entry->vendor_data_length)
+ )
+);
/*
* memory-failure recovery action result event
*
--
2.20.1
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