Commit 37b7370a authored by Borislav Petkov's avatar Borislav Petkov
Browse files

amd64_edac: Do not report error overflow as a separate error 



When the Overflow MCi_STATUS bit is set, EDAC reports the lost error
with a "no information available" message which often puzzles users
parsing the dmesg. This doesn't make much sense since this error has
been lost anyway so no need for reporting it separately. Thus, report
the overflow bit setting in the MCE dump instead. While at it, remove
reporting of MiscV and ErrorEnable (en) which are superfluous.

Now it looks like this:

[ 1501.650024] MC4_STATUS: Corrected error, other errors lost: yes, CPU context corrupt: no, CECC Error
[ 1501.666887] Northbridge Error, node 2

Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent e045c291

drivers/edac/amd64_edac.c

+0 −10
Original line number Diff line number Diff line
@@ -2071,16 +2071,6 @@ static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci, 
		amd64_handle_ce(mci, info);

	else if (ecc_type == 1)

		amd64_handle_ue(mci, info);



	/*

	 * If main error is CE then overflow must be CE.  If main error is UE

	 * then overflow is unknown.  We'll call the overflow a CE - if

	 * panic_on_ue is set then we're already panic'ed and won't arrive

	 * here. Else, then apparently someone doesn't think that UE's are

	 * catastrophic.

	 */

	if (info->nbsh & K8_NBSH_OVERFLOW)

		edac_mc_handle_ce_no_info(mci, EDAC_MOD_STR " Error Overflow");

}



void amd64_decode_bus_error(int node_id, struct err_regs *regs)

drivers/edac/edac_mce_amd.c

+2 −3
Original line number Diff line number Diff line
@@ -365,11 +365,10 @@ static int amd_decode_mce(struct notifier_block *nb, unsigned long val, 


	pr_emerg("MC%d_STATUS: ", m->bank);



	pr_cont("%sorrected error, report: %s, MiscV: %svalid, "

	pr_cont("%sorrected error, other errors lost: %s, "

		 "CPU context corrupt: %s",

		 ((m->status & MCI_STATUS_UC) ? "Unc"  : "C"),

		 ((m->status & MCI_STATUS_EN) ? "yes"  : "no"),

		 ((m->status & MCI_STATUS_MISCV) ? ""  : "in"),

		 ((m->status & MCI_STATUS_OVER) ? "yes"  : "no"),

		 ((m->status & MCI_STATUS_PCC) ? "yes" : "no"));



	/* do the two bits[14:13] together */

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