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([10.124.223.76]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Jul 2024 14:12:47 -0700 From: Rick Edgecombe To: seanjc@google.com, pbonzini@redhat.com, kvm@vger.kernel.org Cc: kai.huang@intel.com, dmatlack@google.com, erdemaktas@google.com, isaku.yamahata@gmail.com, linux-kernel@vger.kernel.org, sagis@google.com, yan.y.zhao@intel.com, rick.p.edgecombe@intel.com, Isaku Yamahata Subject: [PATCH v4 11/18] KVM: x86/tdp_mmu: Take root in tdp_mmu_for_each_pte() Date: Thu, 18 Jul 2024 14:12:23 -0700 Message-Id: <20240718211230.1492011-12-rick.p.edgecombe@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240718211230.1492011-1-rick.p.edgecombe@intel.com> References: <20240718211230.1492011-1-rick.p.edgecombe@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Isaku Yamahata Take the root as an argument of tdp_mmu_for_each_pte() instead of looking it up in the mmu. With no other purpose of passing the mmu, drop it. Future changes will want to change which root is used based on the context of the MMU operation. So change the callers to pass in the root currently used, mmu->root.hpa in a preparatory patch to make the later one smaller and easier to review. Signed-off-by: Isaku Yamahata Signed-off-by: Rick Edgecombe --- v3: - Split from "KVM: x86/mmu: Support GFN direct mask" (Paolo) --- arch/x86/kvm/mmu/tdp_mmu.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 2e7e6e3137c6..19bd891702a9 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -694,8 +694,8 @@ static inline void tdp_mmu_iter_set_spte(struct kvm *kv= m, struct tdp_iter *iter, continue; \ else =20 -#define tdp_mmu_for_each_pte(_iter, _kvm, _mmu, _start, _end) \ - for_each_tdp_pte(_iter, _kvm, root_to_sp(_mmu->root.hpa), _start, _end) +#define tdp_mmu_for_each_pte(_iter, _kvm, _root, _start, _end) \ + for_each_tdp_pte(_iter, _kvm, _root, _start, _end) =20 /* * Yield if the MMU lock is contended or this thread needs to return contr= ol @@ -1117,8 +1117,8 @@ static int tdp_mmu_split_huge_page(struct kvm *kvm, s= truct tdp_iter *iter, */ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault) { - struct kvm_mmu *mmu =3D vcpu->arch.mmu; struct kvm *kvm =3D vcpu->kvm; + struct kvm_mmu_page *root =3D root_to_sp(vcpu->arch.mmu->root.hpa); struct tdp_iter iter; struct kvm_mmu_page *sp; int ret =3D RET_PF_RETRY; @@ -1129,7 +1129,7 @@ int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, struct kvm= _page_fault *fault) =20 rcu_read_lock(); =20 - tdp_mmu_for_each_pte(iter, kvm, mmu, fault->gfn, fault->gfn + 1) { + tdp_mmu_for_each_pte(iter, kvm, root, fault->gfn, fault->gfn + 1) { int r; =20 if (fault->nx_huge_page_workaround_enabled) @@ -1788,14 +1788,14 @@ bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm, int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes, int *root_level) { + struct kvm_mmu_page *root =3D root_to_sp(vcpu->arch.mmu->root.hpa); struct tdp_iter iter; - struct kvm_mmu *mmu =3D vcpu->arch.mmu; gfn_t gfn =3D addr >> PAGE_SHIFT; int leaf =3D -1; =20 *root_level =3D vcpu->arch.mmu->root_role.level; =20 - tdp_mmu_for_each_pte(iter, vcpu->kvm, mmu, gfn, gfn + 1) { + tdp_mmu_for_each_pte(iter, vcpu->kvm, root, gfn, gfn + 1) { leaf =3D iter.level; sptes[leaf] =3D iter.old_spte; } @@ -1817,11 +1817,11 @@ int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64= addr, u64 *sptes, u64 *kvm_tdp_mmu_fast_pf_get_last_sptep(struct kvm_vcpu *vcpu, gfn_t gfn, u64 *spte) { + struct kvm_mmu_page *root =3D root_to_sp(vcpu->arch.mmu->root.hpa); struct tdp_iter iter; - struct kvm_mmu *mmu =3D vcpu->arch.mmu; tdp_ptep_t sptep =3D NULL; =20 - tdp_mmu_for_each_pte(iter, vcpu->kvm, mmu, gfn, gfn + 1) { + tdp_mmu_for_each_pte(iter, vcpu->kvm, root, gfn, gfn + 1) { *spte =3D iter.old_spte; sptep =3D iter.sptep; } --=20 2.34.1