Since KVM_MAX_VCPUS is currently defined to 1024 for x86 as shown in
arch/x86/include/asm/kvm_host.h, update QEMU limits to the same number.
In case KVM could not support the specified number of vcpus, QEMU would
return the following error message:
qemu-system-x86_64: kvm_init_vcpu: kvm_get_vcpu failed (xxx): Invalid argument
Also, keep max_cpus at 288 for machine version 8.0 and older.
Cc: Igor Mammedov <imamm...@redhat.com>
Cc: Daniel P. Berrangé <berra...@redhat.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Julia Suvorova <jus...@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
---
hw/i386/pc_q35.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 371cca7484..63866a16e0 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -360,12 +360,12 @@ static void pc_q35_machine_options(MachineClass *m)
m->default_nic = "e1000e";
m->default_kernel_irqchip_split = false;
m->no_floppy = 1;
+ m->max_cpus = 1024;
m->no_parallel = !module_object_class_by_name(TYPE_ISA_PARALLEL);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_AMD_IOMMU_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_INTEL_IOMMU_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
- m->max_cpus = 288;
}
static void pc_q35_8_1_machine_options(MachineClass *m)
@@ -388,6 +388,7 @@ static void pc_q35_8_0_machine_options(MachineClass *m)
/* For pc-q35-8.0 and older, use SMBIOS 2.8 by default */
pcmc->default_smbios_ep_type = SMBIOS_ENTRY_POINT_TYPE_32;
+ m->max_cpus = 288;
}
DEFINE_Q35_MACHINE(v8_0, "pc-q35-8.0", NULL,
--
2.34.1
