KVM: Add API to retrieve the number of supported vcpus per vm
Avi Kivity [Wed, 20 Feb 2008 09:53:16 +0000 (11:53 +0200)]
Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/x86/kvm/x86.c
include/linux/kvm.h

index 256c0fc..955d2ee 100644 (file)
@@ -811,6 +811,9 @@ int kvm_dev_ioctl_check_extension(long ext)
        case KVM_CAP_VAPIC:
                r = !kvm_x86_ops->cpu_has_accelerated_tpr();
                break;
+       case KVM_CAP_NR_VCPUS:
+               r = KVM_MAX_VCPUS;
+               break;
        default:
                r = 0;
                break;
index 94540b3..deb9c38 100644 (file)
@@ -234,6 +234,7 @@ struct kvm_vapic_addr {
 #define KVM_CAP_VAPIC 6
 #define KVM_CAP_EXT_CPUID 7
 #define KVM_CAP_CLOCKSOURCE 8
+#define KVM_CAP_NR_VCPUS 9       /* returns max vcpus per vm */
 
 /*
  * ioctls for VM fds