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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 /virt/kvm/arm | |
parent | 66b030e48af68fd4c22d343908bc057207a0a31e (diff) | |
download | lwn-065c0034823b513d3ca95760a2ad1765e3ef629c.tar.gz lwn-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 'virt/kvm/arm')
-rw-r--r-- | virt/kvm/arm/vgic.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index b8d57e86cfdc..c84f53dfcd62 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -2302,7 +2302,14 @@ static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) return ret; } - + case KVM_DEV_ARM_VGIC_GRP_CTRL: { + switch (attr->attr) { + case KVM_DEV_ARM_VGIC_CTRL_INIT: + r = vgic_init(dev->kvm); + return r; + } + break; + } } return -ENXIO; @@ -2381,6 +2388,11 @@ static int vgic_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) return vgic_has_attr_regs(vgic_cpu_ranges, offset); case KVM_DEV_ARM_VGIC_GRP_NR_IRQS: return 0; + case KVM_DEV_ARM_VGIC_GRP_CTRL: + switch (attr->attr) { + case KVM_DEV_ARM_VGIC_CTRL_INIT: + return 0; + } } return -ENXIO; } |