diff options
| author | David Woodhouse <[email protected]> | 2022-03-03 15:41:23 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2022-04-02 05:41:16 -0400 |
| commit | 28d1629f751c4a5f9437fbaa0ee4ed81d1a8e587 (patch) | |
| tree | 7bb6ea3c92b73d698db299b5c6edff4bfc678d0b /include/uapi/linux | |
| parent | 536395260582be7443b0b35b0bbb89ffe3947f62 (diff) | |
KVM: x86/xen: Kernel acceleration for XENVER_version
Turns out this is a fast path for PV guests because they use it to
trigger the event channel upcall. So letting it bounce all the way up
to userspace is not great.
Signed-off-by: David Woodhouse <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/kvm.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index cb223e425223..4dda3896ed71 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1711,7 +1711,7 @@ struct kvm_xen_hvm_attr { __u32 padding[4]; } deliver; } evtchn; - + __u32 xen_version; __u64 pad[8]; } u; }; @@ -1722,6 +1722,7 @@ struct kvm_xen_hvm_attr { #define KVM_XEN_ATTR_TYPE_UPCALL_VECTOR 0x2 /* Available with KVM_CAP_XEN_HVM / KVM_XEN_HVM_CONFIG_EVTCHN_SEND */ #define KVM_XEN_ATTR_TYPE_EVTCHN 0x3 +#define KVM_XEN_ATTR_TYPE_XEN_VERSION 0x4 /* Per-vCPU Xen attributes */ #define KVM_XEN_VCPU_GET_ATTR _IOWR(KVMIO, 0xca, struct kvm_xen_vcpu_attr) |