linux-kernel - [PATCH v2 59/66] KVM: x86/mmu: Merge kvm_{enable,disable}

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Message-Id: <20200302235709.27467-60-sean.j.christopherson@intel.com>
Date:   Mon,  2 Mar 2020 15:57:02 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [PATCH v2 59/66] KVM: x86/mmu: Merge kvm_{enable,disable}_tdp() into a common function

Combine kvm_enable_tdp() and kvm_disable_tdp() into a single function,
kvm_configure_mmu(), in preparation for doing additional configuration
during hardware setup.  And because having separate helpers is silly.

No functional change intended.

Reviewed-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/include/asm/kvm_host.h |  3 +--
 arch/x86/kvm/mmu/mmu.c          | 13 +++----------
 arch/x86/kvm/svm.c              |  5 +----
 arch/x86/kvm/vmx/vmx.c          |  4 +---
 4 files changed, 6 insertions(+), 19 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 4fbff24aed8a..036bb0ddeca3 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1503,8 +1503,7 @@ void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid);
 void kvm_mmu_new_cr3(struct kvm_vcpu *vcpu, gpa_t new_cr3, bool skip_tlb_flush);
 
-void kvm_enable_tdp(void);
-void kvm_disable_tdp(void);
+void kvm_configure_mmu(bool enable_tdp);
 
 static inline gpa_t translate_gpa(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
 				  struct x86_exception *exception)
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index c4e0b97f82ac..8e4fe2b13db5 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5546,18 +5546,11 @@ void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_invpcid_gva);
 
-void kvm_enable_tdp(void)
+void kvm_configure_mmu(bool enable_tdp)
 {
-	tdp_enabled = true;
+	tdp_enabled = enable_tdp;
 }
-EXPORT_SYMBOL_GPL(kvm_enable_tdp);
-
-void kvm_disable_tdp(void)
-{
-	tdp_enabled = false;
-}
-EXPORT_SYMBOL_GPL(kvm_disable_tdp);
-
+EXPORT_SYMBOL_GPL(kvm_configure_mmu);
 
 /* The return value indicates if tlb flush on all vcpus is needed. */
 typedef bool (*slot_level_handler) (struct kvm *kvm, struct kvm_rmap_head *rmap_head);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index efc3ec9d8fef..75c735c9425c 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1460,10 +1460,7 @@ static __init int svm_hardware_setup(void)
 	if (npt_enabled && !npt)
 		npt_enabled = false;
 
-	if (npt_enabled)
-		kvm_enable_tdp();
-	else
-		kvm_disable_tdp();
+	kvm_configure_mmu(npt_enabled);
 	pr_info("kvm: Nested Paging %sabled\n", npt_enabled ? "en" : "dis");
 
 	if (nrips) {
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 836f8a8d83df..d664a3f892b8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -5316,7 +5316,6 @@ static void vmx_enable_tdp(void)
 		VMX_EPT_RWX_MASK, 0ull);
 
 	ept_set_mmio_spte_mask();
-	kvm_enable_tdp();
 }
 
 /*
@@ -7743,8 +7742,7 @@ static __init int hardware_setup(void)
 
 	if (enable_ept)
 		vmx_enable_tdp();
-	else
-		kvm_disable_tdp();
+	kvm_configure_mmu(enable_ept);
 
 	/*
 	 * Only enable PML when hardware supports PML feature, and both EPT
-- 
2.24.1