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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-13 14:50:04 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-16 00:05:00 +0200 |
| commit | 557abc40d121358883d2da8bc8bf976d6e8ec332 (patch) | |
| tree | 2ff0bd1c4012d2b07eddc0078b7fd8c0d537cc1d /arch/x86/kvm/x86.c | |
| parent | 6c7caebc26c5f0b618f0ef6b851e9f5f27c3812f (diff) | |
| download | lwn-557abc40d121358883d2da8bc8bf976d6e8ec332.tar.gz lwn-557abc40d121358883d2da8bc8bf976d6e8ec332.zip | |
KVM: remove kvm_vcpu_compatible
The new created_vcpus field makes it possible to avoid the race between
irqchip and VCPU creation in a much nicer way; just check under kvm->lock
whether a VCPU has already been created.
We can then remove KVM_APIC_ARCHITECTURE too, because at this point the
symbol is only governing the default definition of kvm_vcpu_compatible.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bf227212aebb..ab2f45a50bb5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3774,7 +3774,7 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, r = -EEXIST; if (irqchip_in_kernel(kvm)) goto split_irqchip_unlock; - if (atomic_read(&kvm->online_vcpus)) + if (kvm->created_vcpus) goto split_irqchip_unlock; r = kvm_setup_empty_irq_routing(kvm); if (r) @@ -3839,7 +3839,7 @@ long kvm_arch_vm_ioctl(struct file *filp, if (kvm->arch.vpic) goto create_irqchip_unlock; r = -EINVAL; - if (atomic_read(&kvm->online_vcpus)) + if (kvm->created_vcpus) goto create_irqchip_unlock; r = -ENOMEM; vpic = kvm_create_pic(kvm); @@ -3995,7 +3995,7 @@ long kvm_arch_vm_ioctl(struct file *filp, case KVM_SET_BOOT_CPU_ID: r = 0; mutex_lock(&kvm->lock); - if (atomic_read(&kvm->online_vcpus) != 0) + if (kvm->created_vcpus) r = -EBUSY; else kvm->arch.bsp_vcpu_id = arg; @@ -7639,11 +7639,6 @@ bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) return (vcpu->arch.apic_base & MSR_IA32_APICBASE_BSP) != 0; } -bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) -{ - return irqchip_in_kernel(vcpu->kvm) == lapic_in_kernel(vcpu); -} - struct static_key kvm_no_apic_vcpu __read_mostly; EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu); |