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Commit 56cad2d6 authored by Borislav Petkov's avatar Borislav Petkov
Browse files

EDAC, AMD: decode bus unit MCEs 



... according to Table 69, Fam10h BKDG (31116, rev. 3.28).

Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent ab5535e7

drivers/edac/edac_mce_amd.c

+46 −0
Original line number Diff line number Diff line
@@ -228,6 +228,48 @@ static void amd_decode_ic_mce(u64 mc1_status) 
	pr_warning("Corrupted IC MCE info?\n");

}



static void amd_decode_bu_mce(u64 mc2_status)

{

	u32 ec = mc2_status & 0xffff;

	u32 xec = (mc2_status >> 16) & 0xf;



	pr_emerg(" Bus Unit Error");



	if (xec == 0x1)

		pr_cont(" in the write data buffers.\n");

	else if (xec == 0x3)

		pr_cont(" in the victim data buffers.\n");

	else if (xec == 0x2 && MEM_ERROR(ec))

		pr_cont(": %s error in the L2 cache tags.\n", RRRR_MSG(ec));

	else if (xec == 0x0) {

		if (TLB_ERROR(ec))

			pr_cont(": %s error in a Page Descriptor Cache or "

				"Guest TLB.\n", TT_MSG(ec));

		else if (BUS_ERROR(ec))

			pr_cont(": %s/ECC error in data read from NB: %s.\n",

				RRRR_MSG(ec), PP_MSG(ec));

		else if (MEM_ERROR(ec)) {

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



			if (rrrr >= 0x7)

				pr_cont(": %s error during data copyback.\n",

					RRRR_MSG(ec));

			else if (rrrr <= 0x1)

				pr_cont(": %s parity/ECC error during data "

					"access from L2.\n", RRRR_MSG(ec));

			else

				goto wrong_bu_mce;

		} else

			goto wrong_bu_mce;

	} else

		goto wrong_bu_mce;



	return;



wrong_bu_mce:

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

}



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

{

	u32 ec  = ERROR_CODE(regs->nbsl);
@@ -320,6 +362,10 @@ void decode_mce(struct mce *m) 
		amd_decode_ic_mce(m->status);

		break;



	case 2:

		amd_decode_bu_mce(m->status);

		break;



	case 4:

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

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