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authorShuai Xue <xueshuai@linux.alibaba.com>2022-03-08 22:40:51 +0800
committerBorislav Petkov <bp@suse.de>2022-04-08 11:16:08 +0200
commitbdae79651453df0bca20963fc2ab970146ef2a37 (patch)
tree2484d54c58f7766172df4cc8b08fd7865a9ce627
parentb2fa90ef62558ed65f09201b4c8b79ece4468275 (diff)
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
-rw-r--r--drivers/firmware/efi/cper.c30
-rw-r--r--include/linux/cper.h1
2 files changed, 30 insertions, 1 deletions
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 *,