Add compile-time and run-time API versioning.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
Index: linux-2.6/drivers/kvm/kvm_main.c
===================================================================
--- linux-2.6.orig/drivers/kvm/kvm_main.c
+++ linux-2.6/drivers/kvm/kvm_main.c
@@ -1603,6 +1603,9 @@ static long kvm_dev_ioctl(struct file *f
int r = -EINVAL;
switch (ioctl) {
+ case KVM_GET_API_VERSION:
+ r = KVM_API_VERSION;
+ break;
case KVM_CREATE_VCPU: {
r = kvm_dev_ioctl_create_vcpu(kvm, arg);
if (r)
Index: linux-2.6/include/linux/kvm.h
===================================================================
--- linux-2.6.orig/include/linux/kvm.h
+++ linux-2.6/include/linux/kvm.h
@@ -11,6 +11,8 @@
#include <asm/types.h>
#include <linux/ioctl.h>
+#define KVM_API_VERSION 1
+
/*
* Architectural interrupt line count, and the size of the bitmap needed
* to hold them.
@@ -209,6 +211,7 @@ struct kvm_dirty_log {
#define KVMIO 0xAE
+#define KVM_GET_API_VERSION _IO(KVMIO, 1)
#define KVM_RUN _IOWR(KVMIO, 2, struct kvm_run)
#define KVM_GET_REGS _IOWR(KVMIO, 3, struct kvm_regs)
#define KVM_SET_REGS _IOW(KVMIO, 4, struct kvm_regs)
-
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