diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-03-01 17:56:20 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:24 +0300 |
| commit | 5d308f4550d9dc4c236e08b0377b610b9578577b (patch) | |
| tree | c19005059de37403db7962bcfa7bac657331b052 | |
| parent | 739872c56f3322c38320c7a5a543ef6f56f174bc (diff) | |
KVM: Add method to check for backwards-compatible API extensions
Signed-off-by: Avi Kivity <avi@qumranet.com>
| -rw-r--r-- | drivers/kvm/kvm_main.c | 6 | ||||
| -rw-r--r-- | include/linux/kvm.h | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 5d24203afd2..39cf8fd343a 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2416,6 +2416,12 @@ static long kvm_dev_ioctl(struct file *filp, r = 0; break; } + case KVM_CHECK_EXTENSION: + /* + * No extensions defined at present. + */ + r = 0; + break; default: ; } diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 93472daec12..c93cf53953a 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -232,6 +232,11 @@ struct kvm_cpuid { #define KVM_GET_API_VERSION _IO(KVMIO, 0x00) #define KVM_CREATE_VM _IO(KVMIO, 0x01) /* returns a VM fd */ #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 |