Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
hw/i386/acpi-build.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index d6cd06a..2cc3fff 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -361,6 +361,12 @@ build_madt(GArray *table_data, GArray *linker,
if (id.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);
}
}
--
1.8.3.1
