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kvm: x86: hyperv: Use APICv update request interface

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Since disabling APICv has to be done for all vcpus on AMD-based
system, adopt the newly introduced kvm_request_apicv_update()
interface, and introduce a new APICV_INHIBIT_REASON_HYPERV.

Also, remove the kvm_vcpu_deactivate_apicv() since no longer used.

Cc: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2019-11-14 14:15:13 -06:00 committed by Paolo Bonzini
parent 6c3e4422dd
commit f4fdc0a2ed
5 changed files with 8 additions and 18 deletions
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2
arch/x86/include/asm/kvm_host.h
View File

@ -876,6 +876,7 @@ enum kvm_irqchip_mode {
};
#define APICV_INHIBIT_REASON_DISABLE 0
#define APICV_INHIBIT_REASON_HYPERV 1
struct kvm_arch {
unsigned long n_used_mmu_pages;
@ -1483,7 +1484,6 @@ gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
struct x86_exception *exception);
void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu);
bool kvm_apicv_activated(struct kvm *kvm);
void kvm_apicv_init(struct kvm *kvm, bool enable);
void kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu);

5
arch/x86/kvm/hyperv.c
View File

@ -776,9 +776,10 @@ int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages)
/*
* Hyper-V SynIC auto EOI SINT's are
* not compatible with APICV, so deactivate APICV
* not compatible with APICV, so request
* to deactivate APICV permanently.
*/
kvm_vcpu_deactivate_apicv(vcpu);
kvm_request_apicv_update(vcpu->kvm, false, APICV_INHIBIT_REASON_HYPERV);
synic->active = true;
synic->dont_zero_synic_pages = dont_zero_synic_pages;
return 0;

3
arch/x86/kvm/svm.c
View File

@ -7318,7 +7318,8 @@ static bool svm_apic_init_signal_blocked(struct kvm_vcpu *vcpu)
static bool svm_check_apicv_inhibit_reasons(ulong bit)
{
ulong supported = BIT(APICV_INHIBIT_REASON_DISABLE);
ulong supported = BIT(APICV_INHIBIT_REASON_DISABLE) |
BIT(APICV_INHIBIT_REASON_HYPERV);
return supported & BIT(bit);
}

3
arch/x86/kvm/vmx/vmx.c
View File

@ -7712,7 +7712,8 @@ static __exit void hardware_unsetup(void)
static bool vmx_check_apicv_inhibit_reasons(ulong bit)
{
ulong supported = BIT(APICV_INHIBIT_REASON_DISABLE);
ulong supported = BIT(APICV_INHIBIT_REASON_DISABLE) |
BIT(APICV_INHIBIT_REASON_HYPERV);
return supported & BIT(bit);
}

13
arch/x86/kvm/x86.c
View File

@ -7457,19 +7457,6 @@ static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
kvm_irq_delivery_to_apic(kvm, NULL, &lapic_irq, NULL);
}
void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu)
{
if (!lapic_in_kernel(vcpu)) {
WARN_ON_ONCE(vcpu->arch.apicv_active);
return;
}
if (!vcpu->arch.apicv_active)
return;
vcpu->arch.apicv_active = false;
kvm_x86_ops->refresh_apicv_exec_ctrl(vcpu);
}
bool kvm_apicv_activated(struct kvm *kvm)
{
return (READ_ONCE(kvm->arch.apicv_inhibit_reasons) == 0);