aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--hw/i386/acpi-build.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 8736917f0b..0a5acb3828 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -360,6 +360,12 @@ build_madt(GArray *table_data, GArray *linker, PCMachineState *pcms)
if (apic_ids->cpus[i].cpu != NULL) {
apic->flags = cpu_to_le32(1);
} else {
+ /* ACPI spec says that LAPIC entry for non present
+ * CPU may be omitted from MADT or it must be marked
+ * as disabled. However omitting non present CPU from
+ * MADT breaks hotplug on linux. So possible CPUs
+ * should be put in MADT but kept disabled.
+ */
apic->flags = cpu_to_le32(0);
}
}