Commit bdae7965 authored by Shuai Xue's avatar Shuai Xue Committed by Borislav Petkov
Browse files

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: default avatarShuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220308144053.49090-2-xueshuai@linux.alibaba.com
parent b2fa90ef

drivers/firmware/efi/cper.c

+29 −1
Original line number Diff line number Diff line
@@ -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);

include/linux/cper.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *,