Commit f4fdc0a2 authored by Suravee Suthikulpanit's avatar Suravee Suthikulpanit Committed by Paolo Bonzini
Browse files

kvm: x86: hyperv: Use APICv update request interface 



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: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 6c3e4422

arch/x86/include/asm/kvm_host.h

+1 −1
Original line number Diff line number Diff line
@@ -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);

arch/x86/kvm/hyperv.c

+3 −2
Original line number Diff line number Diff line
@@ -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;

arch/x86/kvm/svm.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

}

arch/x86/kvm/vmx/vmx.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

}

arch/x86/kvm/x86.c

+0 −13
Original line number Diff line number Diff line
@@ -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);

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