Module Name: src
Committed By: bouyer
Date: Fri Mar 24 12:25:28 UTC 2023
Modified Files:
src/sys/arch/x86/x86: mpacpi.c
Log Message:
mpacpi_config_cpu(): Xen with a PVH dom0 reports x2apic->LocalApicId
below 0xff, which causes a panic later because no CPUs are attached.
Accept the bogus LocalApicId value for VM_GUEST_XENPVH.
To generate a diff of this commit:
cvs rdiff -u -r1.109 -r1.110 src/sys/arch/x86/x86/mpacpi.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/x86/x86/mpacpi.c
diff -u src/sys/arch/x86/x86/mpacpi.c:1.109 src/sys/arch/x86/x86/mpacpi.c:1.110
--- src/sys/arch/x86/x86/mpacpi.c:1.109 Sat Jan 22 11:49:17 2022
+++ src/sys/arch/x86/x86/mpacpi.c Fri Mar 24 12:25:28 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: mpacpi.c,v 1.109 2022/01/22 11:49:17 thorpej Exp $ */
+/* $NetBSD: mpacpi.c,v 1.110 2023/03/24 12:25:28 bouyer Exp $ */
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
@@ -36,7 +36,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mpacpi.c,v 1.109 2022/01/22 11:49:17 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mpacpi.c,v 1.110 2023/03/24 12:25:28 bouyer Exp $");
#include "acpica.h"
#include "opt_acpi.h"
@@ -396,8 +396,9 @@ mpacpi_config_cpu(ACPI_SUBTABLE_HEADER *
/* ACPI spec: "Logical processors with APIC ID values
* less than 255 must use the Processor Local APIC
* structure to convey their APIC information to OSPM."
+ * But Xen with PVH dom0 breaks this ACPI spec.
*/
- if (x2apic->LocalApicId <= 0xff) {
+ if (x2apic->LocalApicId <= 0xff && vm_guest != VM_GUEST_XENPVH) {
printf("bogus MADT X2APIC entry (id = 0x%"PRIx32")\n",
x2apic->LocalApicId);
break;
