linux-kernel - [PATCH v3 8/8] nSVM: remove unnecessary parameter in nested_vmcb_check

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Date:   Mon, 11 Oct 2021 10:37:02 -0400
From:   Emanuele Giuseppe Esposito <eesposit@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        linux-kernel@...r.kernel.org,
        Emanuele Giuseppe Esposito <eesposit@...hat.com>
Subject: [PATCH v3 8/8] nSVM: remove unnecessary parameter in nested_vmcb_check_controls

Just as in nested_vmcb_valid_sregs, we only need the vcpu param
to perform the checks on vmcb nested state, since we always
look at the cached fields.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@...hat.com>
---
 arch/x86/kvm/svm/nested.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 13be1002ad1c..19bce3819cce 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -209,9 +209,11 @@ static bool nested_svm_check_bitmap_pa(struct kvm_vcpu *vcpu, u64 pa, u32 size)
 	    kvm_vcpu_is_legal_gpa(vcpu, addr + size - 1);
 }
 
-static bool nested_vmcb_check_controls(struct kvm_vcpu *vcpu,
-				       struct vmcb_ctrl_area_cached *control)
+static bool nested_vmcb_check_controls(struct kvm_vcpu *vcpu)
 {
+	struct vcpu_svm *svm = to_svm(vcpu);
+	struct vmcb_ctrl_area_cached *control = &svm->nested.ctl;
+
 	if (CC(!vmcb12_is_intercept(control, INTERCEPT_VMRUN)))
 		return false;
 
@@ -651,7 +653,7 @@ int nested_svm_vmrun(struct kvm_vcpu *vcpu)
 	nested_copy_vmcb_save_to_cache(svm, &vmcb12->save);
 
 	if (!nested_vmcb_valid_sregs(vcpu) ||
-	    !nested_vmcb_check_controls(vcpu, &svm->nested.ctl)) {
+	    !nested_vmcb_check_controls(vcpu)) {
 		vmcb12->control.exit_code    = SVM_EXIT_ERR;
 		vmcb12->control.exit_code_hi = 0;
 		vmcb12->control.exit_info_1  = 0;
@@ -1367,7 +1369,7 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
 
 	ret = -EINVAL;
 	nested_copy_vmcb_control_to_cache(svm, ctl);
-	if (!nested_vmcb_check_controls(vcpu, &svm->nested.ctl))
+	if (!nested_vmcb_check_controls(vcpu))
 		goto out_free_ctl;
 
 	/*
-- 
2.27.0