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KVM: arm/arm64: vgic: Use wrapper function to lock/unlock all vcpus in kvm_vgic_create() 

Use wrapper function lock_all_vcpus()/unlock_all_vcpus()
in kvm_vgic_create() to remove duplicated code dealing
with locking and unlocking all vcpus in a vm.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/1575081918-11401-1-git-send-email-linmiaohe@huawei.com
This commit is contained in:
Miaohe Lin 2019-11-30 10:45:18 +08:00 committed by Marc Zyngier
parent 0bda9498dd
commit 72a610f32e
1 changed files with 4 additions and 15 deletions
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19
virt/kvm/arm/vgic/vgic-init.c
View File

@ -70,7 +70,7 @@ void kvm_vgic_early_init(struct kvm *kvm)
*/
int kvm_vgic_create(struct kvm *kvm, u32 type)
{
int i, vcpu_lock_idx = -1, ret;
int i, ret;
struct kvm_vcpu *vcpu;
if (irqchip_in_kernel(kvm))
@ -86,17 +86,9 @@ int kvm_vgic_create(struct kvm *kvm, u32 type)
!kvm_vgic_global_state.can_emulate_gicv2)
return -ENODEV;
/*
* Any time a vcpu is run, vcpu_load is called which tries to grab the
* vcpu->mutex. By grabbing the vcpu->mutex of all VCPUs we ensure
* that no other VCPUs are run while we create the vgic.
*/
ret = -EBUSY;
kvm_for_each_vcpu(i, vcpu, kvm) {
if (!mutex_trylock(&vcpu->mutex))
goto out_unlock;
vcpu_lock_idx = i;
}
if (!lock_all_vcpus(kvm))
return ret;
kvm_for_each_vcpu(i, vcpu, kvm) {
if (vcpu->arch.has_run_once)
@ -125,10 +117,7 @@ int kvm_vgic_create(struct kvm *kvm, u32 type)
INIT_LIST_HEAD(&kvm->arch.vgic.rd_regions);
out_unlock:
for (; vcpu_lock_idx >= 0; vcpu_lock_idx--) {
vcpu = kvm_get_vcpu(kvm, vcpu_lock_idx);
mutex_unlock(&vcpu->mutex);
}
unlock_all_vcpus(kvm);
return ret;
}