From 72a610f32e1f1664803218ec654a8e3b8fb2081a Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Sat, 30 Nov 2019 10:45:18 +0800 Subject: 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 Signed-off-by: Marc Zyngier Reviewed-by: Eric Auger Reviewed-by: Steven Price Link: https://lore.kernel.org/r/1575081918-11401-1-git-send-email-linmiaohe@huawei.com --- virt/kvm/arm/vgic/vgic-init.c | 19 ++++--------------- 1 file changed, 4 insertions(+), 15 deletions(-) (limited to 'virt/kvm') 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; } -- cgit v1.2.3-59-g8ed1b