linux-kernel - [PATCH 3/4] KVM: nVMX: Introduce __nested_vmx_handle_enlightened

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Date:   Mon,  3 May 2021 17:08:53 +0200
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] KVM: nVMX: Introduce __nested_vmx_handle_enlightened_vmptrld()

As a preparation to mapping eVMCS from vmx_set_nested_state() split
the actual eVMCS mappign from aquiring eVMCS GPA.

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 arch/x86/kvm/vmx/nested.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 2febb1dd68e8..37fdc34f7afc 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -1972,18 +1972,11 @@ static int copy_vmcs12_to_enlightened(struct vcpu_vmx *vmx)
  * This is an equivalent of the nested hypervisor executing the vmptrld
  * instruction.
  */
-static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
-	struct kvm_vcpu *vcpu, bool from_launch)
+static enum nested_evmptrld_status __nested_vmx_handle_enlightened_vmptrld(
+	struct kvm_vcpu *vcpu, u64 evmcs_gpa, bool from_launch)
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	bool evmcs_gpa_changed = false;
-	u64 evmcs_gpa;
-
-	if (likely(!vmx->nested.enlightened_vmcs_enabled))
-		return EVMPTRLD_DISABLED;
-
-	if (!nested_enlightened_vmentry(vcpu, &evmcs_gpa))
-		return EVMPTRLD_DISABLED;
 
 	if (unlikely(!vmx->nested.hv_evmcs ||
 		     evmcs_gpa != vmx->nested.hv_evmcs_vmptr)) {
@@ -2055,6 +2048,21 @@ static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
 	return EVMPTRLD_SUCCEEDED;
 }
 
+static enum nested_evmptrld_status nested_vmx_handle_enlightened_vmptrld(
+	struct kvm_vcpu *vcpu, bool from_launch)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	u64 evmcs_gpa;
+
+	if (likely(!vmx->nested.enlightened_vmcs_enabled))
+		return EVMPTRLD_DISABLED;
+
+	if (!nested_enlightened_vmentry(vcpu, &evmcs_gpa))
+		return EVMPTRLD_DISABLED;
+
+	return __nested_vmx_handle_enlightened_vmptrld(vcpu, evmcs_gpa, from_launch);
+}
+
 void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu)
 {
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
-- 
2.30.2