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authorEric Auger <eric.auger@linaro.org>2014-12-15 20:43:33 +0300
committerChristoffer Dall <christoffer.dall@linaro.org>2015-01-11 16:12:15 +0300
commit065c0034823b513d3ca95760a2ad1765e3ef629c (patch)
tree59cfc086b96c7b1c933121738d83014e2d47a290 /virt/kvm/arm
parent66b030e48af68fd4c22d343908bc057207a0a31e (diff)
downloadlinux-065c0034823b513d3ca95760a2ad1765e3ef629c.tar.xz
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.c14
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;
}