[PATCH v5 1/2] efi/cper: add cper_mem_err_status_str to decode error description

Shuai Xue
2022-01-26T08:17:14Z

Introduce a new helper function cper_mem_err_status_str() which is used to
decode the description of error status, and the cper_print_mem() will call
it and report the details of error status.

Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
---
drivers/firmware/efi/cper.c | 30 +++++++++++++++++++++++++++++-
include/linux/cper.h | 1 +
2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index 6ec8edec6329..34eeaa59f04a 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -211,6 +211,32 @@ const char *cper_mem_err_type_str(unsigned int etype)
}
EXPORT_SYMBOL_GPL(cper_mem_err_type_str);

+const char *cper_mem_err_status_str(u64 status)
+{
+ switch ((status >> 8) & 0xff) {
+ case 1: return "Error detected internal to the component";
+ case 4: return "Storage error in DRAM memory";
+ case 5: return "Storage error in TLB";
+ case 6: return "Storage error in cache";
+ case 7: return "Error in one or more functional units";
+ case 8: return "Component failed self test";
+ case 9: return "Overflow or undervalue of internal queue";
+ case 16: return "Error detected in the bus";
+ case 17: return "Virtual address not found on IO-TLB or IO-PDIR";
+ case 18: return "Improper access error";
+ case 19: return "Access to a memory address which is not mapped to any component";
+ case 20: return "Loss of Lockstep";
+ case 21: return "Response not associated with a request";
+ case 22: return "Bus parity error - must also set the A, C, or D Bits";
+ case 23: return "Detection of a protocol error";
+ case 24: return "Detection of a PATH_ERROR";
+ case 25: return "Bus operation timeout";
+ case 26: return "A read was issued to data that has been poisoned";
+ default: return "Reserved";
+ }
+}
+EXPORT_SYMBOL_GPL(cper_mem_err_status_str);
+
static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg)
{
u32 len, n;
@@ -334,7 +360,9 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem,
return;
}
if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
- printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
+ printk("%s error_status: %s (0x%016llx)\n",
+ pfx, cper_mem_err_status_str(mem->error_status),
+ mem->error_status);
if (mem->validation_bits & CPER_MEM_VALID_PA)
printk("%s""physical_address: 0x%016llx\n",
pfx, mem->physical_addr);
diff --git a/include/linux/cper.h b/include/linux/cper.h
index 6a511a1078ca..5b1dd27b317d 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -558,6 +558,7 @@ extern const char *const cper_proc_error_type_strs[4];
u64 cper_next_record_id(void);
const char *cper_severity_str(unsigned int);
const char *cper_mem_err_type_str(unsigned int);
+const char *cper_mem_err_status_str(u64 status);
void cper_print_bits(const char *prefix, unsigned int bits,
const char * const strs[], unsigned int strs_size);
void cper_mem_err_pack(const struct cper_sec_mem_err *,
--
2.20.1.12.g72788fdb