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pc: q35: Bump max_cpus to 1024

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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 <imammedo@redhat.com>
Cc: Daniel P. Berrangé <berrange@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Julia Suvorova <jusual@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Message-Id: <20230607205717.737749-3-suravee.suthikulpanit@amd.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2023-06-07 15:57:17 -05:00 committed by Michael S. Tsirkin
parent c85cad8105
commit e0001297eb
1 changed files with 2 additions and 1 deletions
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3
hw/i386/pc_q35.c
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@ -368,12 +368,12 @@ 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)
@ -396,6 +396,7 @@ 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,