diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 98209b8c18c1..616491c134ae 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -26,6 +26,7 @@ #include "cpuid.h" #include "pmu.h" #include "hyperv.h" +#include "lapic.h" #include <linux/clocksource.h> #include <linux/interrupt.h> @@ -8013,6 +8014,40 @@ void kvm_make_scan_ioapic_request(struct kvm *kvm) kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); } +void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu) +{ + if (!lapic_in_kernel(vcpu)) + return; + + vcpu->arch.apicv_active = kvm_apicv_activated(vcpu->kvm); + kvm_apic_update_apicv(vcpu); + kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu); +} +EXPORT_SYMBOL_GPL(kvm_vcpu_update_apicv); + +/* + * NOTE: Do not hold any lock prior to calling this. + * + * In particular, kvm_request_apicv_update() expects kvm->srcu not to be + * locked, because it calls __x86_set_memory_region() which does + * synchronize_srcu(&kvm->srcu). + */ +void kvm_request_apicv_update(struct kvm *kvm, bool activate, ulong bit) +{ + if (activate) { + if (!test_and_clear_bit(bit, &kvm->arch.apicv_inhibit_reasons) || + !kvm_apicv_activated(kvm)) + return; + } else { + if (test_and_set_bit(bit, &kvm->arch.apicv_inhibit_reasons) || + kvm_apicv_activated(kvm)) + return; + } + + kvm_make_all_cpus_request(kvm, KVM_REQ_APICV_UPDATE); +} +EXPORT_SYMBOL_GPL(kvm_request_apicv_update); + static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) { if (!kvm_apic_present(vcpu)) @@ -8203,6 +8238,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) */ if (kvm_check_request(KVM_REQ_HV_STIMER, vcpu)) kvm_hv_process_stimers(vcpu); + if (kvm_check_request(KVM_REQ_APICV_UPDATE, vcpu)) + kvm_vcpu_update_apicv(vcpu); } if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { |