diff options
| -rw-r--r-- | hw/i386/acpi-build.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 3e7fba3822..a3133211a8 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -551,6 +551,12 @@ static void fadt_setup(AcpiFadtDescriptorRev1 *fadt, AcpiPmInfo *pm) (1 << ACPI_FADT_F_SLP_BUTTON) | (1 << ACPI_FADT_F_RTC_S4)); fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_USE_PLATFORM_CLOCK); + /* APIC destination mode ("Flat Logical") has an upper limit of 8 CPUs + * For more than 8 CPUs, "Clustered Logical" mode has to be used + */ + if (max_cpus > 8) { + fadt->flags |= cpu_to_le32(1 << ACPI_FADT_F_FORCE_APIC_CLUSTER_MODEL); + } } |