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authorAvi Kivity <avi@qumranet.com>2008-02-20 11:53:16 +0200
committerAvi Kivity <avi@qumranet.com>2008-04-27 11:53:23 +0300
commitf725230af9ea03f6cc6f4a90e87aa428df46ec19 (patch)
treedcbeae15414805505a71b25c0ee989d698522ea4
parent7a95727567f0991751c2db774a110b4f8080de7f (diff)
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KVM: Add API to retrieve the number of supported vcpus per vm
Signed-off-by: Avi Kivity <avi@qumranet.com>
-rw-r--r--arch/x86/kvm/x86.c3
-rw-r--r--include/linux/kvm.h1
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 256c0fc..955d2ee 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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;
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