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author | Eric Auger <eric.auger@linaro.org> | 2014-12-15 18:43:33 +0100 |
---|---|---|
committer | Christoffer Dall <christoffer.dall@linaro.org> | 2015-01-11 14:12:15 +0100 |
commit | 065c0034823b513d3ca95760a2ad1765e3ef629c (patch) | |
tree | 59cfc086b96c7b1c933121738d83014e2d47a290 /Documentation/virtual | |
parent | KVM: arm/arm64: vgic: vgic_init returns -ENODEV when no online vcpu (diff) | |
download | linux-065c0034823b513d3ca95760a2ad1765e3ef629c.tar.xz linux-065c0034823b513d3ca95760a2ad1765e3ef629c.zip |
KVM: arm/arm64: vgic: add init entry to VGIC KVM device
Since the advent of VGIC dynamic initialization, this latter is
initialized quite late on the first vcpu run or "on-demand", when
injecting an IRQ or when the guest sets its registers.
This initialization could be initiated explicitly much earlier
by the users-space, as soon as it has provided the requested
dimensioning parameters.
This patch adds a new entry to the VGIC KVM device that allows
the user to manually request the VGIC init:
- a new KVM_DEV_ARM_VGIC_GRP_CTRL group is introduced.
- Its first attribute is KVM_DEV_ARM_VGIC_CTRL_INIT
The rationale behind introducing a group is to be able to add other
controls later on, if needed.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index df8b0c7540b6..30f5427cf9b0 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -81,3 +81,14 @@ Groups: -EINVAL: Value set is out of the expected range -EBUSY: Value has already be set, or GIC has already been initialized with default values. + + KVM_DEV_ARM_VGIC_GRP_CTRL + Attributes: + KVM_DEV_ARM_VGIC_CTRL_INIT + request the initialization of the VGIC, no additional parameter in + kvm_device_attr.addr. + Errors: + -ENXIO: VGIC not properly configured as required prior to calling + this attribute + -ENODEV: no online VCPU + -ENOMEM: memory shortage when allocating vgic internal data |