linux-kernel - [PATCH v1] KVM: nVMX: Use vcpu instead of vmx->vcpu when vcpu is available

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Message-ID: <20250924145421.2046822-1-xin@zytor.com>
Date: Wed, 24 Sep 2025 07:54:21 -0700
From: "Xin Li (Intel)" <xin@...or.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: seanjc@...gle.com, pbonzini@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com, xin@...or.com, chao.gao@...el.com
Subject: [PATCH v1] KVM: nVMX: Use vcpu instead of vmx->vcpu when vcpu is available

Prefer using vcpu directly when available, instead of accessing it
through vmx->vcpu.

Signed-off-by: Xin Li (Intel) <xin@...or.com>
---
 arch/x86/kvm/vmx/nested.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 76271962cb70..3fca63a261f5 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -761,7 +761,7 @@ static void nested_cache_shadow_vmcs12(struct kvm_vcpu *vcpu,
 				      vmcs12->vmcs_link_pointer, VMCS12_SIZE))
 		return;
 
-	kvm_read_guest_cached(vmx->vcpu.kvm, ghc, get_shadow_vmcs12(vcpu),
+	kvm_read_guest_cached(vcpu->kvm, ghc, get_shadow_vmcs12(vcpu),
 			      VMCS12_SIZE);
 }
 
@@ -780,7 +780,7 @@ static void nested_flush_cached_shadow_vmcs12(struct kvm_vcpu *vcpu,
 				      vmcs12->vmcs_link_pointer, VMCS12_SIZE))
 		return;
 
-	kvm_write_guest_cached(vmx->vcpu.kvm, ghc, get_shadow_vmcs12(vcpu),
+	kvm_write_guest_cached(vcpu->kvm, ghc, get_shadow_vmcs12(vcpu),
 			       VMCS12_SIZE);
 }
 
@@ -2749,7 +2749,7 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
 		vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat);
 		vcpu->arch.pat = vmcs12->guest_ia32_pat;
 	} else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
-		vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
+		vmcs_write64(GUEST_IA32_PAT, vcpu->arch.pat);
 	}
 
 	vcpu->arch.tsc_offset = kvm_calc_nested_tsc_offset(
@@ -3880,7 +3880,7 @@ static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
 		goto vmentry_failed;
 
 	/* Hide L1D cache contents from the nested guest.  */
-	vmx->vcpu.arch.l1tf_flush_l1d = true;
+	vcpu->arch.l1tf_flush_l1d = true;
 
 	/*
 	 * Must happen outside of nested_vmx_enter_non_root_mode() as it will

base-commit: 325fbe689e121ba11c16096f452750614767c31e
-- 
2.51.0