linux-kernel - [PATCH V2 3/8] kvm: x86/mmu: Use kvm_mmu_invalidate_gva() in nested_ept_invalidate

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Message-Id: <20230207155735.2845-4-jiangshanlai@gmail.com>
Date:   Tue,  7 Feb 2023 23:57:29 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, kvm@...r.kernel.org
Subject: [PATCH V2 3/8] kvm: x86/mmu: Use kvm_mmu_invalidate_gva() in nested_ept_invalidate_addr()

From: Lai Jiangshan <jiangshan.ljs@...group.com>

Use kvm_mmu_invalidate_gva() instead open calls to mmu->invlpg().

No functional change intended.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@...group.com>
---
 arch/x86/kvm/mmu/mmu.c    | 1 +
 arch/x86/kvm/vmx/nested.c | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 8563b52b8bb7..e03cf5558773 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -5734,6 +5734,7 @@ void kvm_mmu_invalidate_gva(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 			mmu->invlpg(vcpu, gva, mmu->prev_roots[i].hpa);
 	}
 }
+EXPORT_SYMBOL_GPL(kvm_mmu_invalidate_gva);
 
 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
 {
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 557b9c468734..f552f3c454b1 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -358,6 +358,7 @@ static bool nested_ept_root_matches(hpa_t root_hpa, u64 root_eptp, u64 eptp)
 static void nested_ept_invalidate_addr(struct kvm_vcpu *vcpu, gpa_t eptp,
 				       gpa_t addr)
 {
+	unsigned long roots = 0;
 	uint i;
 	struct kvm_mmu_root_info *cached_root;
 
@@ -368,8 +369,10 @@ static void nested_ept_invalidate_addr(struct kvm_vcpu *vcpu, gpa_t eptp,
 
 		if (nested_ept_root_matches(cached_root->hpa, cached_root->pgd,
 					    eptp))
-			vcpu->arch.mmu->invlpg(vcpu, addr, cached_root->hpa);
+			roots |= KVM_MMU_ROOT_PREVIOUS(i);
 	}
+	if (roots)
+		kvm_mmu_invalidate_gva(vcpu, vcpu->arch.mmu, addr, roots);
 }
 
 static void nested_ept_inject_page_fault(struct kvm_vcpu *vcpu,
-- 
2.19.1.6.gb485710b