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| author | Miaohe Lin <linmiaohe@huawei.com> | 2019-11-30 10:45:18 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2019-12-06 11:41:38 +0000 |
| commit | 72a610f32e1f1664803218ec654a8e3b8fb2081a (patch) | |
| tree | b44caa77f4b0e9f9cd9b21cbb6a69da29e229c58 /virt | |
| parent | 0bda9498dd45280e334bfe88b815ebf519602cc3 (diff) | |
| download | linux-72a610f32e1f1664803218ec654a8e3b8fb2081a.tar.gz linux-72a610f32e1f1664803218ec654a8e3b8fb2081a.tar.bz2 linux-72a610f32e1f1664803218ec654a8e3b8fb2081a.zip | |
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
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-init.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index 7c58112ae67c..a963b9d766b7 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -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; } |