From: Ladi Prosek lprosek@redhat.com
[ Upstream commit 72bbf9358c3676bd89dc4bd8fb0b1f2a11c288fc ]
The state related to the VP assist page is still managed by the LAPIC code in the pv_eoi field.
Signed-off-by: Ladi Prosek lprosek@redhat.com Signed-off-by: Vitaly Kuznetsov vkuznets@redhat.com Reviewed-by: Liran Alon liran.alon@oracle.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kvm/hyperv.c | 23 +++++++++++++++++++++-- arch/x86/kvm/hyperv.h | 4 ++++ arch/x86/kvm/lapic.c | 4 ++-- arch/x86/kvm/lapic.h | 2 +- arch/x86/kvm/x86.c | 2 +- 5 files changed, 29 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 2bb554b90b3c2..5842c5f587fe9 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -691,6 +691,24 @@ 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; @@ -1076,7 +1094,7 @@ 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; } @@ -1089,7 +1107,8 @@ 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; } diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index d6aa969e20f19..0e66c12ed2c3d 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -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) { diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 031bd7f91f98a..ccf5a04de94c3 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -2628,7 +2628,7 @@ 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)) @@ -2638,7 +2638,7 @@ 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) diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h index ed0ed39abd369..ff6ef9c3d760c 100644 --- a/arch/x86/kvm/lapic.h +++ b/arch/x86/kvm/lapic.h @@ -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);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e10a7a42449b3..ed6b43f344b0c 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2494,7 +2494,7 @@ 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;