linux-kernel - [PATCH v6 01/12] KVM: SVM: Introduce vmcb_(set_intercept/clr_intercept/_is

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Date:   Fri, 11 Sep 2020 14:27:58 -0500
From:   Babu Moger <babu.moger@....com>
To:     pbonzini@...hat.com, vkuznets@...hat.com,
        sean.j.christopherson@...el.com, jmattson@...gle.com
Cc:     wanpengli@...cent.com, kvm@...r.kernel.org, joro@...tes.org,
        x86@...nel.org, linux-kernel@...r.kernel.org, babu.moger@....com,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, tglx@...utronix.de
Subject: [PATCH v6 01/12] KVM: SVM: Introduce
 vmcb_(set_intercept/clr_intercept/_is_intercept)

This is in preparation for the future intercept vector additions.

Add new functions vmcb_set_intercept, vmcb_clr_intercept and vmcb_is_intercept
using kernel APIs __set_bit, __clear_bit and test_bit espectively.

Signed-off-by: Babu Moger <babu.moger@....com>
Reviewed-by: Jim Mattson <jmattson@...gle.com>
---
 arch/x86/kvm/svm/svm.h |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index a798e1731709..1cff7644e70b 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -214,6 +214,21 @@ static inline struct vmcb *get_host_vmcb(struct vcpu_svm *svm)
 		return svm->vmcb;
 }
 
+static inline void vmcb_set_intercept(struct vmcb_control_area *control, int bit)
+{
+	__set_bit(bit, (unsigned long *)&control->intercept_cr);
+}
+
+static inline void vmcb_clr_intercept(struct vmcb_control_area *control, int bit)
+{
+	__clear_bit(bit, (unsigned long *)&control->intercept_cr);
+}
+
+static inline bool vmcb_is_intercept(struct vmcb_control_area *control, int bit)
+{
+	return test_bit(bit, (unsigned long *)&control->intercept_cr);
+}
+
 static inline void set_cr_intercept(struct vcpu_svm *svm, int bit)
 {
 	struct vmcb *vmcb = get_host_vmcb(svm);