linux-kernel - [PATCH 5/5] KVM: x86/mmu: Add convenience wrapper for acting on single hva in TDP MMU

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Date:   Thu, 25 Feb 2021 17:03:29 -0800
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     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>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ben Gardon <bgardon@...gle.com>
Subject: [PATCH 5/5] KVM: x86/mmu: Add convenience wrapper for acting on
 single hva in TDP MMU

Add a TDP MMU helper to handle a single HVA hook, the name is a nice
reminder that the flow in question is operating on a single HVA.

No functional change intended.

Cc: Ben Gardon <bgardon@...gle.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/mmu/tdp_mmu.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index b6f829b58e67..c0c09ec07c53 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -922,6 +922,14 @@ static __always_inline int kvm_tdp_mmu_handle_hva_range(struct kvm *kvm,
 	return ret;
 }
 
+static __always_inline int kvm_tdp_mmu_handle_hva(struct kvm *kvm,
+						  unsigned long addr,
+						  unsigned long data,
+						  tdp_handler_t handler)
+{
+	return kvm_tdp_mmu_handle_hva_range(kvm, addr, addr + 1, data, handler);
+}
+
 static int zap_gfn_range_hva_wrapper(struct kvm *kvm,
 				     struct kvm_memory_slot *slot,
 				     struct kvm_mmu_page *root, gfn_t start,
@@ -1009,8 +1017,7 @@ static int test_age_gfn(struct kvm *kvm, struct kvm_memory_slot *slot,
 
 int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva)
 {
-	return kvm_tdp_mmu_handle_hva_range(kvm, hva, hva + 1, 0,
-					    test_age_gfn);
+	return kvm_tdp_mmu_handle_hva(kvm, hva, 0, test_age_gfn);
 }
 
 /*
@@ -1071,9 +1078,8 @@ static int set_tdp_spte(struct kvm *kvm, struct kvm_memory_slot *slot,
 int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
 			     pte_t *host_ptep)
 {
-	return kvm_tdp_mmu_handle_hva_range(kvm, address, address + 1,
-					    (unsigned long)host_ptep,
-					    set_tdp_spte);
+	return kvm_tdp_mmu_handle_hva(kvm, address, (unsigned long)host_ptep,
+				      set_tdp_spte);
 }
 
 /*
-- 
2.30.1.766.gb4fecdf3b7-goog