Re: [RFC PATCH v2 63/69] KVM: VMX: Move .get_interrupt_shadow() implementation to common VMX code

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On 03/07/21 00:05, isaku.yamahata@xxxxxxxxx wrote:
From: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>

Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
  arch/x86/kvm/vmx/common.h | 14 ++++++++++++++
  arch/x86/kvm/vmx/vmx.c    | 10 +---------
  2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kvm/vmx/common.h b/arch/x86/kvm/vmx/common.h
index 755aaec85199..817ff3e74933 100644
--- a/arch/x86/kvm/vmx/common.h
+++ b/arch/x86/kvm/vmx/common.h
@@ -120,6 +120,20 @@ static inline int __vmx_handle_ept_violation(struct kvm_vcpu *vcpu, gpa_t gpa,
  	return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0);
  }
+static inline u32 __vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu)
+{
+	u32 interruptibility;
+	int ret = 0;
+
+	interruptibility = vmread32(vcpu, GUEST_INTERRUPTIBILITY_INFO);
+	if (interruptibility & GUEST_INTR_STATE_STI)
+		ret |= KVM_X86_SHADOW_INT_STI;
+	if (interruptibility & GUEST_INTR_STATE_MOV_SS)
+		ret |= KVM_X86_SHADOW_INT_MOV_SS;
+
+	return ret;
+}
+
  static inline u32 vmx_encode_ar_bytes(struct kvm_segment *var)
  {
  	u32 ar;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index d69d4dc7c071..d31cace67907 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -1467,15 +1467,7 @@ void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu)
  {
-	u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
-	int ret = 0;
-
-	if (interruptibility & GUEST_INTR_STATE_STI)
-		ret |= KVM_X86_SHADOW_INT_STI;
-	if (interruptibility & GUEST_INTR_STATE_MOV_SS)
-		ret |= KVM_X86_SHADOW_INT_MOV_SS;
-
-	return ret;
+	return __vmx_get_interrupt_shadow(vcpu);
  }
void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)


Is there any reason to add the __ version, since at this point kvm_x86_ops is already pointing to vt_get_interrupt_shadow?

Paolo




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