Commit 72bbf935 authored by Ladi Prosek's avatar Ladi Prosek Committed by Paolo Bonzini
Browse files

KVM: hyperv: define VP assist page helpers 



The state related to the VP assist page is still managed by the LAPIC
code in the pv_eoi field.

Signed-off-by: default avatarLadi Prosek <lprosek@redhat.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: default avatarLiran Alon <liran.alon@oracle.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 970c0d4b

arch/x86/kvm/hyperv.c

+21 −2
Original line number Diff line number Diff line
@@ -693,6 +693,24 @@ void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu) 
		stimer_cleanup(&hv_vcpu->stimer[i]);

}



bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu)

{

	if (!(vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE))

		return false;

	return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED;

}

EXPORT_SYMBOL_GPL(kvm_hv_assist_page_enabled);



bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,

			    struct hv_vp_assist_page *assist_page)

{

	if (!kvm_hv_assist_page_enabled(vcpu))

		return false;

	return !kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data,

				      assist_page, sizeof(*assist_page));

}

EXPORT_SYMBOL_GPL(kvm_hv_get_assist_page);



static void stimer_prepare_msg(struct kvm_vcpu_hv_stimer *stimer)

{

	struct hv_message *msg = &stimer->msg;
@@ -1078,7 +1096,7 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host) 


		if (!(data & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE)) {

			hv_vcpu->hv_vapic = data;

			if (kvm_lapic_enable_pv_eoi(vcpu, 0))

			if (kvm_lapic_enable_pv_eoi(vcpu, 0, 0))

				return 1;

			break;

		}
@@ -1091,7 +1109,8 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host) 
		hv_vcpu->hv_vapic = data;

		kvm_vcpu_mark_page_dirty(vcpu, gfn);

		if (kvm_lapic_enable_pv_eoi(vcpu,

					    gfn_to_gpa(gfn) | KVM_MSR_ENABLED))

					    gfn_to_gpa(gfn) | KVM_MSR_ENABLED,

					    sizeof(struct hv_vp_assist_page)))

			return 1;

		break;

	}

arch/x86/kvm/hyperv.h

+4 −0
Original line number Diff line number Diff line
@@ -62,6 +62,10 @@ void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); 
void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu);

void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu);



bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu);

bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,

			    struct hv_vp_assist_page *assist_page);



static inline struct kvm_vcpu_hv_stimer *vcpu_to_stimer(struct kvm_vcpu *vcpu,

							int timer_index)

{

arch/x86/kvm/lapic.c

+2 −2
Original line number Diff line number Diff line
@@ -2644,7 +2644,7 @@ int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 reg, u64 *data) 
	return 0;

}



int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data)

int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len)

{

	u64 addr = data & ~KVM_MSR_ENABLED;

	if (!IS_ALIGNED(addr, 4))
@@ -2654,7 +2654,7 @@ int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data) 
	if (!pv_eoi_enabled(vcpu))

		return 0;

	return kvm_gfn_to_hva_cache_init(vcpu->kvm, &vcpu->arch.pv_eoi.data,

					 addr, sizeof(u8));

					 addr, len);

}



void kvm_apic_accept_events(struct kvm_vcpu *vcpu)

arch/x86/kvm/lapic.h

+1 −1
Original line number Diff line number Diff line
@@ -120,7 +120,7 @@ static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu) 
	return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;

}



int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);

int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len);

void kvm_lapic_init(void);

void kvm_lapic_exit(void);

arch/x86/kvm/x86.c

+1 −1
Original line number Diff line number Diff line
@@ -2477,7 +2477,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) 


		break;

	case MSR_KVM_PV_EOI_EN:

		if (kvm_lapic_enable_pv_eoi(vcpu, data))

		if (kvm_lapic_enable_pv_eoi(vcpu, data, sizeof(u8)))

			return 1;

		break;

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