linux-kernel - [PATCH v2 04/10] KVM: nVMX: Move nested VM-Exit tracepoint into nested_vmx_reflect

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Date:   Wed, 15 Apr 2020 10:55:13 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [PATCH v2 04/10] KVM: nVMX: Move nested VM-Exit tracepoint into nested_vmx_reflect_vmexit()

Move the tracepoint for nested VM-Exits in preparation of splitting the
reflection logic into L1 wants the exit vs. L0 always handles the exit.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/kvm/vmx/nested.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index cb7fd78ad9da..de122ef3eeed 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5648,19 +5648,13 @@ static bool nested_vmx_exit_handled_mtf(struct vmcs12 *vmcs12)
  */
 static bool nested_vmx_exit_reflected(struct kvm_vcpu *vcpu, u32 exit_reason)
 {
-	u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
-
-	trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason,
-				vmcs_readl(EXIT_QUALIFICATION),
-				vmx->idt_vectoring_info,
-				intr_info,
-				vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
-				KVM_ISA_VMX);
+	u32 intr_info;
 
 	switch (exit_reason) {
 	case EXIT_REASON_EXCEPTION_NMI:
+		intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
 		if (is_nmi(intr_info))
 			return false;
 		else if (is_page_fault(intr_info))
@@ -5828,6 +5822,14 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason)
 		goto reflect_vmexit;
 	}
 
+	exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
+	exit_qual = vmcs_readl(EXIT_QUALIFICATION);
+
+	trace_kvm_nested_vmexit(kvm_rip_read(vcpu), exit_reason, exit_qual,
+				vmx->idt_vectoring_info, exit_intr_info,
+				vmcs_read32(VM_EXIT_INTR_ERROR_CODE),
+				KVM_ISA_VMX);
+
 	if (!nested_vmx_exit_reflected(vcpu, exit_reason))
 		return false;
 
@@ -5838,7 +5840,6 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason)
 	 */
 	WARN_ON(exit_reason == EXIT_REASON_EXTERNAL_INTERRUPT);
 
-	exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
 	if ((exit_intr_info &
 	     (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) ==
 	    (INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) {
@@ -5847,7 +5848,6 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason)
 		vmcs12->vm_exit_intr_error_code =
 			vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
 	}
-	exit_qual = vmcs_readl(EXIT_QUALIFICATION);
 
 reflect_vmexit:
 	nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, exit_qual);
-- 
2.26.0