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KVM: Add method to check for backwards-compatible API extensions

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Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity
2007-03-01 17:56:20 +02:00
parent 739872c56f
commit 5d308f4550
2 changed files with 11 additions and 0 deletions
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6
drivers/kvm/kvm_main.c
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@@ -2416,6 +2416,12 @@ static long kvm_dev_ioctl(struct file *filp,
r = 0; r = 0;
break; break;
} }
case KVM_CHECK_EXTENSION:
/*
* No extensions defined at present.
*/
r = 0;
break;
default: default:
; ;
} }

5
include/linux/kvm.h
View File

@@ -232,6 +232,11 @@ struct kvm_cpuid {
#define KVM_GET_API_VERSION _IO(KVMIO, 0x00) #define KVM_GET_API_VERSION _IO(KVMIO, 0x00)
#define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */ #define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */
#define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list) #define KVM_GET_MSR_INDEX_LIST _IOWR(KVMIO, 0x02, struct kvm_msr_list)
/*
* Check if a kvm extension is available. Argument is extension number,
* return is 1 (yes) or 0 (no, sorry).
*/
#define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03)
/* /*
* ioctls for VM fds * ioctls for VM fds