KVM: arm/arm64: prefer IS_ENABLED to a static variable
IS_ENABLED gives compile-time checking and keeps the code clearer. The one exception is inside kvm_vm_ioctl_check_extension, where the established idiom is to wrap the case labels with an #ifdef. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>hifive-unleashed-5.1
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0f37247574
commit
69ff5c619c
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@ -61,8 +61,6 @@ static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
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static u8 kvm_next_vmid;
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static u8 kvm_next_vmid;
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static DEFINE_SPINLOCK(kvm_vmid_lock);
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static DEFINE_SPINLOCK(kvm_vmid_lock);
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static bool vgic_present;
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static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu)
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static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu)
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{
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{
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BUG_ON(preemptible());
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BUG_ON(preemptible());
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@ -172,9 +170,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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{
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{
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int r;
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int r;
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switch (ext) {
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switch (ext) {
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#ifdef CONFIG_KVM_ARM_VGIC
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case KVM_CAP_IRQCHIP:
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case KVM_CAP_IRQCHIP:
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r = vgic_present;
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#endif
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break;
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case KVM_CAP_DEVICE_CTRL:
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case KVM_CAP_DEVICE_CTRL:
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case KVM_CAP_USER_MEMORY:
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case KVM_CAP_USER_MEMORY:
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case KVM_CAP_SYNC_MMU:
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case KVM_CAP_SYNC_MMU:
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@ -831,7 +829,7 @@ static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
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switch (dev_id) {
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switch (dev_id) {
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case KVM_ARM_DEVICE_VGIC_V2:
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case KVM_ARM_DEVICE_VGIC_V2:
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if (!vgic_present)
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if (!IS_ENABLED(CONFIG_KVM_ARM_VGIC))
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return -ENXIO;
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return -ENXIO;
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return kvm_vgic_addr(kvm, type, &dev_addr->addr, true);
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return kvm_vgic_addr(kvm, type, &dev_addr->addr, true);
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default:
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default:
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@ -847,10 +845,9 @@ long kvm_arch_vm_ioctl(struct file *filp,
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switch (ioctl) {
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switch (ioctl) {
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case KVM_CREATE_IRQCHIP: {
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case KVM_CREATE_IRQCHIP: {
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if (vgic_present)
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if (!IS_ENABLED(CONFIG_KVM_ARM_VGIC))
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return kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
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else
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return -ENXIO;
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return -ENXIO;
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return kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
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}
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}
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case KVM_ARM_SET_DEVICE_ADDR: {
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case KVM_ARM_SET_DEVICE_ADDR: {
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struct kvm_arm_device_addr dev_addr;
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struct kvm_arm_device_addr dev_addr;
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@ -1035,10 +1032,6 @@ static int init_hyp_mode(void)
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if (err)
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if (err)
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goto out_free_context;
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goto out_free_context;
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#ifdef CONFIG_KVM_ARM_VGIC
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vgic_present = true;
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#endif
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/*
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/*
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* Init HYP architected timer support
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* Init HYP architected timer support
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*/
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*/
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