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-rw-r--r--arch/powerpc/kernel/mce.c121
1 files changed, 64 insertions, 57 deletions
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index b5fec1f9751a..b18df633eae9 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Machine check exception handling.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
* Copyright 2013 IBM Corporation
* Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
*/
@@ -112,6 +99,7 @@ void save_mce_event(struct pt_regs *regs, long handled,
mce->srr1 = regs->msr;
mce->gpr3 = regs->gpr[3];
mce->in_use = 1;
+ mce->cpu = get_paca()->paca_index;
/* Mark it recovered if we have handled it and MSR(RI=1). */
if (handled && (regs->msr & MSR_RI))
@@ -121,6 +109,8 @@ void save_mce_event(struct pt_regs *regs, long handled,
mce->initiator = mce_err->initiator;
mce->severity = mce_err->severity;
+ mce->sync_error = mce_err->sync_error;
+ mce->error_class = mce_err->error_class;
/*
* Populate the mce error_type and type-specific error_type.
@@ -310,7 +300,11 @@ static void machine_check_process_queued_event(struct irq_work *work)
void machine_check_print_event_info(struct machine_check_event *evt,
bool user_mode, bool in_guest)
{
- const char *level, *sevstr, *subtype;
+ const char *level, *sevstr, *subtype, *err_type;
+ uint64_t ea = 0, pa = 0;
+ int n = 0;
+ char dar_str[50];
+ char pa_str[50];
static const char *mc_ue_types[] = {
"Indeterminate",
"Instruction fetch",
@@ -357,6 +351,13 @@ void machine_check_print_event_info(struct machine_check_event *evt,
"Store (timeout)",
"Page table walk Load/Store (timeout)",
};
+ static const char *mc_error_class[] = {
+ "Unknown",
+ "Hardware error",
+ "Probable Hardware error (some chance of software cause)",
+ "Software error",
+ "Probable Software error (some chance of hardware cause)",
+ };
/* Print things out */
if (evt->version != MCE_V1) {
@@ -371,9 +372,9 @@ void machine_check_print_event_info(struct machine_check_event *evt,
break;
case MCE_SEV_WARNING:
level = KERN_WARNING;
- sevstr = "";
+ sevstr = "Warning";
break;
- case MCE_SEV_ERROR_SYNC:
+ case MCE_SEV_SEVERE:
level = KERN_ERR;
sevstr = "Severe";
break;
@@ -384,101 +385,107 @@ void machine_check_print_event_info(struct machine_check_event *evt,
break;
}
- printk("%s%s Machine check interrupt [%s]\n", level, sevstr,
- evt->disposition == MCE_DISPOSITION_RECOVERED ?
- "Recovered" : "Not recovered");
-
- if (in_guest) {
- printk("%s Guest NIP: %016llx\n", level, evt->srr0);
- } else if (user_mode) {
- printk("%s NIP: [%016llx] PID: %d Comm: %s\n", level,
- evt->srr0, current->pid, current->comm);
- } else {
- printk("%s NIP [%016llx]: %pS\n", level, evt->srr0,
- (void *)evt->srr0);
- }
-
- printk("%s Initiator: %s\n", level,
- evt->initiator == MCE_INITIATOR_CPU ? "CPU" : "Unknown");
switch (evt->error_type) {
case MCE_ERROR_TYPE_UE:
+ err_type = "UE";
subtype = evt->u.ue_error.ue_error_type <
ARRAY_SIZE(mc_ue_types) ?
mc_ue_types[evt->u.ue_error.ue_error_type]
: "Unknown";
- printk("%s Error type: UE [%s]\n", level, subtype);
if (evt->u.ue_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.ue_error.effective_address);
+ ea = evt->u.ue_error.effective_address;
if (evt->u.ue_error.physical_address_provided)
- printk("%s Physical address: %016llx\n",
- level, evt->u.ue_error.physical_address);
+ pa = evt->u.ue_error.physical_address;
break;
case MCE_ERROR_TYPE_SLB:
+ err_type = "SLB";
subtype = evt->u.slb_error.slb_error_type <
ARRAY_SIZE(mc_slb_types) ?
mc_slb_types[evt->u.slb_error.slb_error_type]
: "Unknown";
- printk("%s Error type: SLB [%s]\n", level, subtype);
if (evt->u.slb_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.slb_error.effective_address);
+ ea = evt->u.slb_error.effective_address;
break;
case MCE_ERROR_TYPE_ERAT:
+ err_type = "ERAT";
subtype = evt->u.erat_error.erat_error_type <
ARRAY_SIZE(mc_erat_types) ?
mc_erat_types[evt->u.erat_error.erat_error_type]
: "Unknown";
- printk("%s Error type: ERAT [%s]\n", level, subtype);
if (evt->u.erat_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.erat_error.effective_address);
+ ea = evt->u.erat_error.effective_address;
break;
case MCE_ERROR_TYPE_TLB:
+ err_type = "TLB";
subtype = evt->u.tlb_error.tlb_error_type <
ARRAY_SIZE(mc_tlb_types) ?
mc_tlb_types[evt->u.tlb_error.tlb_error_type]
: "Unknown";
- printk("%s Error type: TLB [%s]\n", level, subtype);
if (evt->u.tlb_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.tlb_error.effective_address);
+ ea = evt->u.tlb_error.effective_address;
break;
case MCE_ERROR_TYPE_USER:
+ err_type = "User";
subtype = evt->u.user_error.user_error_type <
ARRAY_SIZE(mc_user_types) ?
mc_user_types[evt->u.user_error.user_error_type]
: "Unknown";
- printk("%s Error type: User [%s]\n", level, subtype);
if (evt->u.user_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.user_error.effective_address);
+ ea = evt->u.user_error.effective_address;
break;
case MCE_ERROR_TYPE_RA:
+ err_type = "Real address";
subtype = evt->u.ra_error.ra_error_type <
ARRAY_SIZE(mc_ra_types) ?
mc_ra_types[evt->u.ra_error.ra_error_type]
: "Unknown";
- printk("%s Error type: Real address [%s]\n", level, subtype);
if (evt->u.ra_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.ra_error.effective_address);
+ ea = evt->u.ra_error.effective_address;
break;
case MCE_ERROR_TYPE_LINK:
+ err_type = "Link";
subtype = evt->u.link_error.link_error_type <
ARRAY_SIZE(mc_link_types) ?
mc_link_types[evt->u.link_error.link_error_type]
: "Unknown";
- printk("%s Error type: Link [%s]\n", level, subtype);
if (evt->u.link_error.effective_address_provided)
- printk("%s Effective address: %016llx\n",
- level, evt->u.link_error.effective_address);
+ ea = evt->u.link_error.effective_address;
break;
default:
case MCE_ERROR_TYPE_UNKNOWN:
- printk("%s Error type: Unknown\n", level);
+ err_type = "Unknown";
+ subtype = "";
break;
}
+
+ dar_str[0] = pa_str[0] = '\0';
+ if (ea && evt->srr0 != ea) {
+ /* Load/Store address */
+ n = sprintf(dar_str, "DAR: %016llx ", ea);
+ if (pa)
+ sprintf(dar_str + n, "paddr: %016llx ", pa);
+ } else if (pa) {
+ sprintf(pa_str, " paddr: %016llx", pa);
+ }
+
+ printk("%sMCE: CPU%d: machine check (%s) %s %s %s %s[%s]\n",
+ level, evt->cpu, sevstr, in_guest ? "Guest" : "Host",
+ err_type, subtype, dar_str,
+ evt->disposition == MCE_DISPOSITION_RECOVERED ?
+ "Recovered" : "Not recovered");
+
+ if (in_guest || user_mode) {
+ printk("%sMCE: CPU%d: PID: %d Comm: %s %sNIP: [%016llx]%s\n",
+ level, evt->cpu, current->pid, current->comm,
+ in_guest ? "Guest " : "", evt->srr0, pa_str);
+ } else {
+ printk("%sMCE: CPU%d: NIP: [%016llx] %pS%s\n",
+ level, evt->cpu, evt->srr0, (void *)evt->srr0, pa_str);
+ }
+
+ subtype = evt->error_class < ARRAY_SIZE(mc_error_class) ?
+ mc_error_class[evt->error_class] : "Unknown";
+ printk("%sMCE: CPU%d: %s\n", level, evt->cpu, subtype);
}
EXPORT_SYMBOL_GPL(machine_check_print_event_info);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.