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KVM: arm64: Fix GICv4 init when called from vgic_its_create 

Commit 3d1ad640f8 ("KVM: arm/arm64: Fix GICv4 ITS initialization
issues") moved the vgic_supports_direct_msis() check in vgic_v4_init().
However when vgic_v4_init is called from vgic_its_create(), the has_its
field is not yet set. Hence vgic_supports_direct_msis returns false and
vgic_v4_init does nothing.

The gic/its init sequence is a bit messy, so let's be specific about the
prerequisite checks in the various call paths instead of relying on a
common wrapper.

Fixes: 3d1ad640f8 ("KVM: arm/arm64: Fix GICv4 ITS initialization issues")
Reported-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Christoffer Dall 2018-01-12 11:40:21 +01:00
parent c507babf10
commit f8f85dc00b
2 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
virt/kvm/arm/vgic/vgic-init.c
View File

@ -285,9 +285,11 @@ int vgic_init(struct kvm *kvm)
if (ret)
goto out;
ret = vgic_v4_init(kvm);
if (ret)
goto out;
if (vgic_has_its(kvm)) {
ret = vgic_v4_init(kvm);
if (ret)
goto out;
}
kvm_for_each_vcpu(i, vcpu, kvm)
kvm_vgic_vcpu_enable(vcpu);

2
virt/kvm/arm/vgic/vgic-v4.c
View File

@ -118,7 +118,7 @@ int vgic_v4_init(struct kvm *kvm)
struct kvm_vcpu *vcpu;
int i, nr_vcpus, ret;
if (!vgic_supports_direct_msis(kvm))
if (!kvm_vgic_global_state.has_gicv4)
return 0; /* Nothing to see here... move along. */
if (dist->its_vm.vpes)