diff options
| author | Andrey Smetanin <asmetanin@virtuozzo.com> | 2015-11-10 15:36:35 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-11-25 17:24:22 +0100 |
| commit | db3975717ac5e2c2761bae7b90c4f2e0abb5ef22 (patch) | |
| tree | 4252bea2d4fafcd11b680a4ae77f8dd9731a705b /Documentation/virtual/kvm/api.txt | |
| parent | 5c919412fe61c35947816fdbd5f7bd09fe0dd073 (diff) | |
| download | lwn-db3975717ac5e2c2761bae7b90c4f2e0abb5ef22.tar.gz lwn-db3975717ac5e2c2761bae7b90c4f2e0abb5ef22.zip | |
kvm/x86: Hyper-V kvm exit
A new vcpu exit is introduced to notify the userspace of the
changes in Hyper-V SynIC configuration triggered by guest writing to the
corresponding MSRs.
Changes v4:
* exit into userspace only if guest writes into SynIC MSR's
Changes v3:
* added KVM_EXIT_HYPERV types and structs notes into docs
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virtual/kvm/api.txt')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 88af84675af0..053f613fc9a9 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -3337,6 +3337,28 @@ the userspace IOAPIC should process the EOI and retrigger the interrupt if it is still asserted. Vector is the LAPIC interrupt vector for which the EOI was received. + struct kvm_hyperv_exit { +#define KVM_EXIT_HYPERV_SYNIC 1 + __u32 type; + union { + struct { + __u32 msr; + __u64 control; + __u64 evt_page; + __u64 msg_page; + } synic; + } u; + }; + /* KVM_EXIT_HYPERV */ + struct kvm_hyperv_exit hyperv; +Indicates that the VCPU exits into userspace to process some tasks +related to Hyper-V emulation. +Valid values for 'type' are: + KVM_EXIT_HYPERV_SYNIC -- synchronously notify user-space about +Hyper-V SynIC state change. Notification is used to remap SynIC +event/message pages and to enable/disable SynIC messages/events processing +in userspace. + /* Fix the size of the union. */ char padding[256]; }; |