[PATCH v2 18/29] KVM: nSVM: Split nested_svm_transition_tlb_flush() into entry/exit fns

[Yosry Ahmed <yosry@kernel.org>]

The handling for the entry and exit TLB flushes will diverge
significantly in the following changes. Instead of adding an 'is_vmenter'
argument like nested_vmx_transition_tlb_flush(), just split the function
into two variants for 'entry' and 'exit'.

No functional change intended.

Signed-off-by: Yosry Ahmed <yosry@kernel.org>
---
 arch/x86/kvm/svm/nested.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 27f78228a42d5..efe7a39b53656 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -688,7 +688,7 @@ static void nested_save_pending_event_to_vmcb12(struct vcpu_svm *svm,
 	vmcb12->control.exit_int_info = exit_int_info;
 }
 
-static void nested_svm_transition_tlb_flush(struct kvm_vcpu *vcpu)
+static void nested_svm_entry_tlb_flush(struct kvm_vcpu *vcpu)
 {
 	/* Handle pending Hyper-V TLB flush requests */
 	kvm_hv_nested_transtion_tlb_flush(vcpu, npt_enabled);
@@ -708,6 +708,14 @@ static void nested_svm_transition_tlb_flush(struct kvm_vcpu *vcpu)
 	kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu);
 }
 
+static void nested_svm_exit_tlb_flush(struct kvm_vcpu *vcpu)
+{
+	kvm_hv_nested_transtion_tlb_flush(vcpu, npt_enabled);
+
+	kvm_make_request(KVM_REQ_MMU_SYNC, vcpu);
+	kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu);
+}
+
 /*
  * Load guest's/host's cr3 on nested vmentry or vmexit. @nested_npt is true
  * if we are emulating VM-Entry into a guest with NPT enabled.
@@ -858,7 +866,7 @@ static void nested_vmcb02_prepare_control(struct vcpu_svm *svm)
 	struct vmcb *vmcb01 = svm->vmcb01.ptr;
 	struct kvm_vcpu *vcpu = &svm->vcpu;
 
-	nested_svm_transition_tlb_flush(vcpu);
+	nested_svm_entry_tlb_flush(vcpu);
 
 	/* Enter Guest-Mode */
 	enter_guest_mode(vcpu);
@@ -1434,7 +1442,7 @@ void nested_svm_vmexit(struct vcpu_svm *svm)
 	svm->vcpu.arch.dr7 = DR7_FIXED_1;
 	kvm_update_dr7(&svm->vcpu);
 
-	nested_svm_transition_tlb_flush(vcpu);
+	nested_svm_exit_tlb_flush(vcpu);
 
 	nested_svm_uninit_mmu_context(vcpu);
 
@@ -1553,7 +1561,7 @@ void svm_leave_nested(struct kvm_vcpu *vcpu)
 		 */
 		__svm_pmu_handle_nested_transition(svm, true);
 
-		nested_svm_transition_tlb_flush(vcpu);
+		nested_svm_exit_tlb_flush(vcpu);
 
 		nested_svm_uninit_mmu_context(vcpu);
 		vmcb_mark_all_dirty(svm->vmcb);
-- 
2.56.0.360.g66cac248cb-goog