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Commit ab5535e7 authored by Borislav Petkov's avatar Borislav Petkov
Browse files

EDAC, AMD: decode instruction cache MCEs 



See Fam10h BKDG (31116, rev. 3.28), Table 95

Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent 51966241

drivers/edac/edac_mce_amd.c

+61 −0
Original line number Diff line number Diff line
@@ -171,6 +171,63 @@ static void amd_decode_dc_mce(u64 mc0_status) 
	pr_warning("Corrupted DC MCE info?\n");

}



static void amd_decode_ic_mce(u64 mc1_status)

{

	u32 ec  = mc1_status & 0xffff;

	u32 xec = (mc1_status >> 16) & 0xf;



	pr_emerg(" Instruction Cache Error");



	if (xec == 1 && TLB_ERROR(ec))

		pr_cont(": %s TLB multimatch.\n", LL_MSG(ec));

	else if (xec == 0) {

		if (TLB_ERROR(ec))

			pr_cont(": %s TLB Parity error.\n", LL_MSG(ec));

		else if (BUS_ERROR(ec)) {

			if (boot_cpu_data.x86 == 0xf &&

			    (mc1_status & (1ULL << 58)))

				pr_cont(" during system linefill.\n");

			else

				pr_cont(" during attempted NB data read.\n");

		} else if (MEM_ERROR(ec)) {

			u8 ll   = ec & 0x3;

			u8 rrrr = (ec >> 4) & 0xf;



			if (ll == 0x2)

				pr_cont(" during a linefill from L2.\n");

			else if (ll == 0x1) {



				switch (rrrr) {

				case 0x5:

					pr_cont(": Parity error during "

					       "data load.\n");

					break;



				case 0x7:

					pr_cont(": Copyback Parity/Victim"

						" error.\n");

					break;



				case 0x8:

					pr_cont(": Tag Snoop error.\n");

					break;



				default:

					goto wrong_ic_mce;

					break;

				}

			}

		} else

			goto wrong_ic_mce;

	} else

		goto wrong_ic_mce;



	return;



wrong_ic_mce:

	pr_warning("Corrupted IC MCE info?\n");

}



void amd_decode_nb_mce(int node_id, struct err_regs *regs, int handle_errors)

{

	u32 ec  = ERROR_CODE(regs->nbsl);
@@ -259,6 +316,10 @@ void decode_mce(struct mce *m) 
		amd_decode_dc_mce(m->status);

		break;



	case 1:

		amd_decode_ic_mce(m->status);

		break;



	case 4:

		regs.nbsl  = (u32) m->status;

		regs.nbsh  = (u32)(m->status >> 32);