KVM: x86: hyper-v: Always use to_hv_vcpu() accessor to get to 'struct kvm_vcpu_hv'

As a preparation to allocating Hyper-V context dynamically, make it clear
who's the user of the said context.

No functional change intended.
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-11-vkuznets@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/hyperv.c

@@ -191,7 +191,7 @@ static void kvm_hv_notify_acked_sint(struct kvm_vcpu *vcpu, u32 sint)
 static void synic_exit(struct kvm_vcpu_hv_synic *synic, u32 msr)
 {
 	struct kvm_vcpu *vcpu = hv_synic_to_vcpu(synic);
-	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
 	hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNIC;
 	hv_vcpu->exit.u.synic.msr = msr;
@@ -294,7 +294,7 @@ static int kvm_hv_syndbg_complete_userspace(struct kvm_vcpu *vcpu)
 static void syndbg_exit(struct kvm_vcpu *vcpu, u32 msr)
 {
 	struct kvm_hv_syndbg *syndbg = to_hv_syndbg(vcpu);
-	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
 	hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNDBG;
 	hv_vcpu->exit.u.syndbg.msr = msr;
@@ -840,7 +840,9 @@ void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu)
 
 bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu)
 {
-	if (!(vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE))
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
+
+	if (!(hv_vcpu->hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE))
 		return false;
 	return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED;
 }
@@ -1231,7 +1233,7 @@ static u64 current_task_runtime_100ns(void)
 
 static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
 {
-	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
 	switch (msr) {
 	case HV_X64_MSR_VP_INDEX: {
@@ -1394,7 +1396,7 @@ static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
 			  bool host)
 {
 	u64 data = 0;
-	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 
 	switch (msr) {
 	case HV_X64_MSR_VP_INDEX:
@@ -1512,7 +1514,7 @@ static __always_inline unsigned long *sparse_set_to_vcpu_mask(
 static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, u64 ingpa, u16 rep_cnt, bool ex)
 {
 	struct kvm *kvm = vcpu->kvm;
-	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
 	struct hv_tlb_flush_ex flush_ex;
 	struct hv_tlb_flush flush;
 	u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];

arch/x86/kvm/hyperv.h

@@ -119,7 +119,9 @@ static inline struct kvm_vcpu *hv_stimer_to_vcpu(struct kvm_vcpu_hv_stimer *stim
 
 static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu)
 {
-	return !bitmap_empty(vcpu->arch.hyperv.stimer_pending_bitmap,
+	struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
+
+	return !bitmap_empty(hv_vcpu->stimer_pending_bitmap,
 			     HV_SYNIC_STIMER_COUNT);
 }
 

arch/x86/kvm/lapic.h

@@ -6,6 +6,8 @@
 
 #include <linux/kvm_host.h>
 
+#include "hyperv.h"
+
 #define KVM_APIC_INIT		0
 #define KVM_APIC_SIPI		1
 #define KVM_APIC_LVT_NUM	6

arch/x86/kvm/vmx/vmx.c

@@ -6809,12 +6809,14 @@ static fastpath_t vmx_vcpu_run(struct kvm_vcpu *vcpu)
 	x86_spec_ctrl_restore_host(vmx->spec_ctrl, 0);
 
 	/* All fields are clean at this point */
-	if (static_branch_unlikely(&enable_evmcs))
+	if (static_branch_unlikely(&enable_evmcs)) {
+		struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
+
 		current_evmcs->hv_clean_fields |=
 			HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL;
 
-	if (static_branch_unlikely(&enable_evmcs))
-		current_evmcs->hv_vp_id = vcpu->arch.hyperv.vp_index;
+		current_evmcs->hv_vp_id = hv_vcpu->vp_index;
+	}
 
 	/* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */
 	if (vmx->host_debugctlmsr)

arch/x86/kvm/x86.c

@@ -8955,8 +8955,10 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
 			goto out;
 		}
 		if (kvm_check_request(KVM_REQ_HV_EXIT, vcpu)) {
+			struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
+
 			vcpu->run->exit_reason = KVM_EXIT_HYPERV;
-			vcpu->run->hyperv = vcpu->arch.hyperv.exit;
+			vcpu->run->hyperv = hv_vcpu->exit;
 			r = 0;
 			goto out;
 		}