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efi/cper: Add a cper_mem_err_status_str() to decode error description 

Introduce a new helper function cper_mem_err_status_str() to decode the
error status value into a human readable string.

  [ bp: Massage. ]

Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220308144053.49090-2-xueshuai@linux.alibaba.com
This commit is contained in:
Shuai Xue 2022-03-08 22:40:51 +08:00 committed by Borislav Petkov
parent b2fa90ef62
commit bdae796514
2 changed files with 30 additions and 1 deletions
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30
drivers/firmware/efi/cper.c
View File

@ -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);

1
include/linux/cper.h
View File

@ -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 *,