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| author | Joao Martins <joao.m.martins@oracle.com> | 2022-03-03 15:41:19 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-04-02 05:41:15 -0400 |
| commit | 2fd6df2f2b47d4301b1ee0fe9d627d1c061a5988 (patch) | |
| tree | b15937bfe67a5d8f9cb59b3db7493240b3337f5c /include/uapi/linux | |
| parent | 35025735a79eaa894c43837b94fd33c9d6b122df (diff) | |
| download | linux-stable-2fd6df2f2b47d4301b1ee0fe9d627d1c061a5988.tar.gz linux-stable-2fd6df2f2b47d4301b1ee0fe9d627d1c061a5988.tar.bz2 linux-stable-2fd6df2f2b47d4301b1ee0fe9d627d1c061a5988.zip | |
KVM: x86/xen: intercept EVTCHNOP_send from guests
Userspace registers a sending @port to either deliver to an @eventfd
or directly back to a local event channel port.
After binding events the guest or host may wish to bind those
events to a particular vcpu. This is usually done for unbound
and and interdomain events. Update requests are handled via the
KVM_XEN_EVTCHN_UPDATE flag.
Unregistered ports are handled by the emulator.
Co-developed-by: Ankur Arora <ankur.a.arora@oracle.com>
Co-developed-By: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220303154127.202856-10-dwmw2@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/kvm.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 49cd2e9e0f6a..623ed2cb228f 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1686,6 +1686,32 @@ struct kvm_xen_hvm_attr { struct { __u64 gfn; } shared_info; + struct { + __u32 send_port; + __u32 type; /* EVTCHNSTAT_ipi / EVTCHNSTAT_interdomain */ + __u32 flags; +#define KVM_XEN_EVTCHN_DEASSIGN (1 << 0) +#define KVM_XEN_EVTCHN_UPDATE (1 << 1) +#define KVM_XEN_EVTCHN_RESET (1 << 2) + /* + * Events sent by the guest are either looped back to + * the guest itself (potentially on a different port#) + * or signalled via an eventfd. + */ + union { + struct { + __u32 port; + __u32 vcpu; + __u32 priority; + } port; + struct { + __u32 port; /* Zero for eventfd */ + __s32 fd; + } eventfd; + __u32 padding[4]; + } deliver; + } evtchn; + __u64 pad[8]; } u; }; @@ -1694,6 +1720,8 @@ struct kvm_xen_hvm_attr { #define KVM_XEN_ATTR_TYPE_LONG_MODE 0x0 #define KVM_XEN_ATTR_TYPE_SHARED_INFO 0x1 #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 /* Per-vCPU Xen attributes */ #define KVM_XEN_VCPU_GET_ATTR _IOWR(KVMIO, 0xca, struct kvm_xen_vcpu_attr) |