diff options
| author | Avi Kivity <avi@qumranet.com> | 2007-03-07 13:05:38 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:24 +0300 |
| commit | 07c45a366d89f8eaec5d9890e810171b408f9a52 (patch) | |
| tree | 2f54f8c4ba795a1432ee6ac2e8042a472b87550a /include/linux/kvm.h | |
| parent | 1961d276c877b99f5f16aaf36377c75e0e191c3a (diff) | |
KVM: Allow kernel to select size of mmap() buffer
This allows us to store offsets in the kernel/user kvm_run area, and be
sure that userspace has them mapped. As offsets can be outside the
kvm_run struct, userspace has no way of knowing how much to mmap.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/linux/kvm.h')
| -rw-r--r-- | include/linux/kvm.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h index c0d10cd8088..dad90816cad 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -253,6 +253,10 @@ struct kvm_signal_mask { * return is 1 (yes) or 0 (no, sorry). */ #define KVM_CHECK_EXTENSION _IO(KVMIO, 0x03) +/* + * Get size for mmap(vcpu_fd) + */ +#define KVM_GET_VCPU_MMAP_SIZE _IO(KVMIO, 0x04) /* in bytes */ /* * ioctls for VM fds |