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| author | Shannon Zhao <shannon.zhao@linaro.org> | 2016-01-11 13:56:17 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-02-29 19:34:21 +0100 |
| commit | f577f6c2a6a5ccabe98061f256a1e2ff468d5e93 (patch) | |
| tree | 278bd52115efb03e8d23ab4f80969a9bd1d6dab3 /Documentation/virtual | |
| parent | arm64: KVM: Add a new feature bit for PMUv3 (diff) | |
| download | linux-f577f6c2a6a5ccabe98061f256a1e2ff468d5e93.tar.xz linux-f577f6c2a6a5ccabe98061f256a1e2ff468d5e93.zip | |
arm64: KVM: Introduce per-vcpu kvm device controls
In some cases it needs to get/set attributes specific to a vcpu and so
needs something else than ONE_REG.
Let's copy the KVM_DEVICE approach, and define the respective ioctls
for the vcpu file descriptor.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 10 | ||||
| -rw-r--r-- | Documentation/virtual/kvm/devices/vcpu.txt | 8 |
2 files changed, 14 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 9684f8dc6bb2..cb2ef0bcdcb5 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2507,8 +2507,9 @@ struct kvm_create_device { 4.80 KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR -Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device -Type: device ioctl, vm ioctl +Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, + KVM_CAP_VCPU_ATTRIBUTES for vcpu device +Type: device ioctl, vm ioctl, vcpu ioctl Parameters: struct kvm_device_attr Returns: 0 on success, -1 on error Errors: @@ -2533,8 +2534,9 @@ struct kvm_device_attr { 4.81 KVM_HAS_DEVICE_ATTR -Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device -Type: device ioctl, vm ioctl +Capability: KVM_CAP_DEVICE_CTRL, KVM_CAP_VM_ATTRIBUTES for vm device, + KVM_CAP_VCPU_ATTRIBUTES for vcpu device +Type: device ioctl, vm ioctl, vcpu ioctl Parameters: struct kvm_device_attr Returns: 0 on success, -1 on error Errors: diff --git a/Documentation/virtual/kvm/devices/vcpu.txt b/Documentation/virtual/kvm/devices/vcpu.txt new file mode 100644 index 000000000000..3cc59c5e44ce --- /dev/null +++ b/Documentation/virtual/kvm/devices/vcpu.txt @@ -0,0 +1,8 @@ +Generic vcpu interface +==================================== + +The virtual cpu "device" also accepts the ioctls KVM_SET_DEVICE_ATTR, +KVM_GET_DEVICE_ATTR, and KVM_HAS_DEVICE_ATTR. The interface uses the same struct +kvm_device_attr as other devices, but targets VCPU-wide settings and controls. + +The groups and attributes per virtual cpu, if any, are architecture specific. |