From c5d5cd68b54df1c172d3d98d1874e28dbdd452c3 Mon Sep 17 00:00:00 2001
From: Avi Kivity <avi@qumranet.com>
Date: Wed, 20 Feb 2008 11:53:16 +0200
Subject: [PATCH] KVM: Add API to retrieve the number of supported vcpus per vm
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/x86.c | 3 +++
include/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 256c0fc92b67b..955d2eeac964d 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 94540b3c6872e..deb9c38f98e73 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
--
2.39.5