[kvm-commits] [PATCH] KVM: Add API to retrieve the number of supported vcpus per vm

[Avi Kivity]

From: Avi Kivity <[EMAIL PROTECTED]>

Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index dc8d538..112b8c2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -794,6 +794,9 @@ 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;
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index 94540b3..deb9c38 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -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

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