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authorEric Auger <eric.auger@linaro.org>2014-12-15 18:43:33 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2015-01-11 14:12:15 +0100
commit065c0034823b513d3ca95760a2ad1765e3ef629c (patch)
tree59cfc086b96c7b1c933121738d83014e2d47a290 /Documentation/virtual
parent66b030e48af68fd4c22d343908bc057207a0a31e (diff)
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.txt11
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