diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 3 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 21 |
2 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index fa32b53..2f9e504 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -667,6 +667,7 @@ struct kvm_arch { #endif bool boot_vcpu_runs_old_kvmclock; + u32 bsp_vcpu_id; u64 disabled_quirks; }; @@ -1215,5 +1216,7 @@ int __x86_set_memory_region(struct kvm *kvm, const struct kvm_userspace_memory_region *mem); int x86_set_memory_region(struct kvm *kvm, const struct kvm_userspace_memory_region *mem); +bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu); +bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu); #endif /* _ASM_X86_KVM_HOST_H */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 28076c2..c675ea33 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2461,6 +2461,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_TSC_DEADLINE_TIMER: case KVM_CAP_ENABLE_CAP_VM: case KVM_CAP_DISABLE_QUIRKS: + case KVM_CAP_SET_BOOT_CPU_ID: #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT case KVM_CAP_ASSIGN_DEV_IRQ: case KVM_CAP_PCI_2_3: @@ -3777,6 +3778,15 @@ long kvm_arch_vm_ioctl(struct file *filp, r = kvm_vm_ioctl_reinject(kvm, &control); break; } + case KVM_SET_BOOT_CPU_ID: + r = 0; + mutex_lock(&kvm->lock); + if (atomic_read(&kvm->online_vcpus) != 0) + r = -EBUSY; + else + kvm->arch.bsp_vcpu_id = arg; + mutex_unlock(&kvm->lock); + break; case KVM_XEN_HVM_CONFIG: { r = -EFAULT; if (copy_from_user(&kvm->arch.xen_hvm_config, argp, @@ -7291,6 +7301,17 @@ void kvm_arch_check_processor_compat(void *rtn) kvm_x86_ops->check_processor_compatibility(rtn); } +bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu) +{ + return vcpu->kvm->arch.bsp_vcpu_id == vcpu->vcpu_id; +} +EXPORT_SYMBOL_GPL(kvm_vcpu_is_reset_bsp); + +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) == (vcpu->arch.apic != NULL); |
