From nobody Wed Feb 11 08:12:25 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E960C761A6 for ; Wed, 5 Apr 2023 00:31:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236654AbjDEAbo (ORCPT ); Tue, 4 Apr 2023 20:31:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236566AbjDEAbk (ORCPT ); Tue, 4 Apr 2023 20:31:40 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF33C44BA for ; Tue, 4 Apr 2023 17:31:38 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id l14-20020a170902f68e00b001a1a9a1d326so20008150plg.9 for ; Tue, 04 Apr 2023 17:31:38 -0700 (PDT) DKIM-Signature: v=1; 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Tue, 04 Apr 2023 17:31:38 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 4 Apr 2023 17:31:32 -0700 In-Reply-To: <20230405003133.419177-1-seanjc@google.com> Mime-Version: 1.0 References: <20230405003133.419177-1-seanjc@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230405003133.419177-2-seanjc@google.com> Subject: [PATCH 1/2] KVM: x86: Rename Hyper-V remote TLB hooks to match established scheme From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Vitaly Kuznetsov Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, David Matlack Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Rename the Hyper-V hooks for TLB flushing to match the naming scheme used by all the other TLB flushing hooks, e.g. in kvm_x86_ops, vendor code, arch hooks from common code, etc. Signed-off-by: Sean Christopherson Reviewed-by: David Matlack Reviewed-by: Vitaly Kuznetsov --- arch/x86/include/asm/kvm-x86-ops.h | 4 ++-- arch/x86/include/asm/kvm_host.h | 10 +++++----- arch/x86/kvm/kvm_onhyperv.c | 13 ++++++------- arch/x86/kvm/kvm_onhyperv.h | 5 ++--- arch/x86/kvm/mmu/mmu.c | 12 ++++++------ arch/x86/kvm/svm/svm_onhyperv.h | 5 ++--- arch/x86/kvm/vmx/vmx.c | 5 ++--- 7 files changed, 25 insertions(+), 29 deletions(-) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-= x86-ops.h index 8dc345cc6318..430ca22170e0 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -54,8 +54,8 @@ KVM_X86_OP(set_rflags) KVM_X86_OP(get_if_flag) KVM_X86_OP(flush_tlb_all) KVM_X86_OP(flush_tlb_current) -KVM_X86_OP_OPTIONAL(tlb_remote_flush) -KVM_X86_OP_OPTIONAL(tlb_remote_flush_with_range) +KVM_X86_OP_OPTIONAL(flush_remote_tlbs) +KVM_X86_OP_OPTIONAL(flush_remote_tlbs_range) KVM_X86_OP(flush_tlb_gva) KVM_X86_OP(flush_tlb_guest) KVM_X86_OP(vcpu_pre_run) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index 991296a2f807..ec22101410ee 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1588,9 +1588,9 @@ struct kvm_x86_ops { =20 void (*flush_tlb_all)(struct kvm_vcpu *vcpu); void (*flush_tlb_current)(struct kvm_vcpu *vcpu); - int (*tlb_remote_flush)(struct kvm *kvm); - int (*tlb_remote_flush_with_range)(struct kvm *kvm, - struct kvm_tlb_range *range); + int (*flush_remote_tlbs)(struct kvm *kvm); + int (*flush_remote_tlbs_range)(struct kvm *kvm, + struct kvm_tlb_range *range); =20 /* * Flush any TLB entries associated with the given GVA. @@ -1794,8 +1794,8 @@ void kvm_arch_free_vm(struct kvm *kvm); #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB static inline int kvm_arch_flush_remote_tlb(struct kvm *kvm) { - if (kvm_x86_ops.tlb_remote_flush && - !static_call(kvm_x86_tlb_remote_flush)(kvm)) + if (kvm_x86_ops.flush_remote_tlbs && + !static_call(kvm_x86_flush_remote_tlbs)(kvm)) return 0; else return -ENOTSUPP; diff --git a/arch/x86/kvm/kvm_onhyperv.c b/arch/x86/kvm/kvm_onhyperv.c index 482d6639ef88..2e2d08da8a3f 100644 --- a/arch/x86/kvm/kvm_onhyperv.c +++ b/arch/x86/kvm/kvm_onhyperv.c @@ -29,8 +29,7 @@ static inline int hv_remote_flush_root_tdp(hpa_t root_tdp, return hyperv_flush_guest_mapping(root_tdp); } =20 -int hv_remote_flush_tlb_with_range(struct kvm *kvm, - struct kvm_tlb_range *range) +int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *rang= e) { struct kvm_arch *kvm_arch =3D &kvm->arch; struct kvm_vcpu *vcpu; @@ -86,19 +85,19 @@ int hv_remote_flush_tlb_with_range(struct kvm *kvm, spin_unlock(&kvm_arch->hv_root_tdp_lock); return ret; } -EXPORT_SYMBOL_GPL(hv_remote_flush_tlb_with_range); +EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs_range); =20 -int hv_remote_flush_tlb(struct kvm *kvm) +int hv_flush_remote_tlbs(struct kvm *kvm) { - return hv_remote_flush_tlb_with_range(kvm, NULL); + return hv_flush_remote_tlbs_range(kvm, NULL); } -EXPORT_SYMBOL_GPL(hv_remote_flush_tlb); +EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs); =20 void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp) { struct kvm_arch *kvm_arch =3D &vcpu->kvm->arch; =20 - if (kvm_x86_ops.tlb_remote_flush =3D=3D hv_remote_flush_tlb) { + if (kvm_x86_ops.flush_remote_tlbs =3D=3D hv_flush_remote_tlbs) { spin_lock(&kvm_arch->hv_root_tdp_lock); vcpu->arch.hv_root_tdp =3D root_tdp; if (root_tdp !=3D kvm_arch->hv_root_tdp) diff --git a/arch/x86/kvm/kvm_onhyperv.h b/arch/x86/kvm/kvm_onhyperv.h index 287e98ef9df3..55d7fcb84cc1 100644 --- a/arch/x86/kvm/kvm_onhyperv.h +++ b/arch/x86/kvm/kvm_onhyperv.h @@ -7,9 +7,8 @@ #define __ARCH_X86_KVM_KVM_ONHYPERV_H__ =20 #if IS_ENABLED(CONFIG_HYPERV) -int hv_remote_flush_tlb_with_range(struct kvm *kvm, - struct kvm_tlb_range *range); -int hv_remote_flush_tlb(struct kvm *kvm); +int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *rang= e); +int hv_flush_remote_tlbs(struct kvm *kvm); void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp); #else /* !CONFIG_HYPERV */ static inline void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 4c874d4ec68f..7654be48ff69 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -270,9 +270,9 @@ static inline unsigned long kvm_mmu_get_guest_pgd(struc= t kvm_vcpu *vcpu, return mmu->get_guest_pgd(vcpu); } =20 -static inline bool kvm_available_flush_tlb_with_range(void) +static inline bool kvm_available_flush_remote_tlbs_range(void) { - return kvm_x86_ops.tlb_remote_flush_with_range; + return kvm_x86_ops.flush_remote_tlbs_range; } =20 void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, @@ -284,8 +284,8 @@ void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t= start_gfn, range.start_gfn =3D start_gfn; range.pages =3D nr_pages; =20 - if (kvm_x86_ops.tlb_remote_flush_with_range) - ret =3D static_call(kvm_x86_tlb_remote_flush_with_range)(kvm, &range); + if (kvm_x86_ops.flush_remote_tlbs_range) + ret =3D static_call(kvm_x86_flush_remote_tlbs_range)(kvm, &range); =20 if (ret) kvm_flush_remote_tlbs(kvm); @@ -1498,7 +1498,7 @@ static bool kvm_set_pte_rmap(struct kvm *kvm, struct = kvm_rmap_head *rmap_head, } } =20 - if (need_flush && kvm_available_flush_tlb_with_range()) { + if (need_flush && kvm_available_flush_remote_tlbs_range()) { kvm_flush_remote_tlbs_gfn(kvm, gfn, level); return false; } @@ -6623,7 +6623,7 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *= kvm, PG_LEVEL_NUM)) { kvm_zap_one_rmap_spte(kvm, rmap_head, sptep); =20 - if (kvm_available_flush_tlb_with_range()) + if (kvm_available_flush_remote_tlbs_range()) kvm_flush_remote_tlbs_sptep(kvm, sptep); else need_tlb_flush =3D 1; diff --git a/arch/x86/kvm/svm/svm_onhyperv.h b/arch/x86/kvm/svm/svm_onhyper= v.h index cff838f15db5..823001033539 100644 --- a/arch/x86/kvm/svm/svm_onhyperv.h +++ b/arch/x86/kvm/svm/svm_onhyperv.h @@ -35,9 +35,8 @@ static inline __init void svm_hv_hardware_setup(void) if (npt_enabled && ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) { pr_info(KBUILD_MODNAME ": Hyper-V enlightened NPT TLB flush enabled\n"); - svm_x86_ops.tlb_remote_flush =3D hv_remote_flush_tlb; - svm_x86_ops.tlb_remote_flush_with_range =3D - hv_remote_flush_tlb_with_range; + svm_x86_ops.flush_remote_tlbs =3D hv_flush_remote_tlbs; + svm_x86_ops.flush_remote_tlbs_range =3D hv_flush_remote_tlbs_range; } =20 if (ms_hyperv.nested_features & HV_X64_NESTED_DIRECT_FLUSH) { diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index d7bf14abdba1..8031bded75cc 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -8432,9 +8432,8 @@ static __init int hardware_setup(void) #if IS_ENABLED(CONFIG_HYPERV) if (ms_hyperv.nested_features & HV_X64_NESTED_GUEST_MAPPING_FLUSH && enable_ept) { - vmx_x86_ops.tlb_remote_flush =3D hv_remote_flush_tlb; - vmx_x86_ops.tlb_remote_flush_with_range =3D - hv_remote_flush_tlb_with_range; + vmx_x86_ops.flush_remote_tlbs =3D hv_flush_remote_tlbs; + vmx_x86_ops.flush_remote_tlbs_range =3D hv_flush_remote_tlbs_range; } #endif =20 --=20 2.40.0.348.gf938b09366-goog From nobody Wed Feb 11 08:12:25 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E985CC761A6 for ; Wed, 5 Apr 2023 00:31:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235798AbjDEAbt (ORCPT ); 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Tue, 04 Apr 2023 17:31:40 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 4 Apr 2023 17:31:33 -0700 In-Reply-To: <20230405003133.419177-1-seanjc@google.com> Mime-Version: 1.0 References: <20230405003133.419177-1-seanjc@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230405003133.419177-3-seanjc@google.com> Subject: [PATCH 2/2] KVM: x86/mmu: Move filling of Hyper-V's TLB range struct into Hyper-V code From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Vitaly Kuznetsov Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, David Matlack Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Refactor Hyper-V's range-based TLB flushing API to take a gfn+nr_pages pair instead of a struct, and bury said struct in Hyper-V specific code. Passing along two params generates much better code for the common case where KVM is _not_ running on Hyper-V, as forwarding the flush on to Hyper-V's hv_flush_remote_tlbs_range() from kvm_flush_remote_tlbs_range() becomes a tail call. Cc: David Matlack Signed-off-by: Sean Christopherson Reviewed-by: David Matlack Reviewed-by: Vitaly Kuznetsov --- arch/x86/include/asm/kvm_host.h | 9 ++------- arch/x86/kvm/kvm_onhyperv.c | 24 ++++++++++++++++++++---- arch/x86/kvm/kvm_onhyperv.h | 2 +- arch/x86/kvm/mmu/mmu.c | 8 ++------ 4 files changed, 25 insertions(+), 18 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index ec22101410ee..09eb37853cb1 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -482,11 +482,6 @@ struct kvm_mmu { u64 pdptrs[4]; /* pae */ }; =20 -struct kvm_tlb_range { - u64 start_gfn; - u64 pages; -}; - enum pmc_type { KVM_PMC_GP =3D 0, KVM_PMC_FIXED, @@ -1589,8 +1584,8 @@ struct kvm_x86_ops { void (*flush_tlb_all)(struct kvm_vcpu *vcpu); void (*flush_tlb_current)(struct kvm_vcpu *vcpu); int (*flush_remote_tlbs)(struct kvm *kvm); - int (*flush_remote_tlbs_range)(struct kvm *kvm, - struct kvm_tlb_range *range); + int (*flush_remote_tlbs_range)(struct kvm *kvm, gfn_t gfn, + gfn_t nr_pages); =20 /* * Flush any TLB entries associated with the given GVA. diff --git a/arch/x86/kvm/kvm_onhyperv.c b/arch/x86/kvm/kvm_onhyperv.c index 2e2d08da8a3f..ded0bd688c65 100644 --- a/arch/x86/kvm/kvm_onhyperv.c +++ b/arch/x86/kvm/kvm_onhyperv.c @@ -10,17 +10,22 @@ #include "hyperv.h" #include "kvm_onhyperv.h" =20 +struct kvm_hv_tlb_range { + u64 start_gfn; + u64 pages; +}; + static int kvm_fill_hv_flush_list_func(struct hv_guest_mapping_flush_list = *flush, void *data) { - struct kvm_tlb_range *range =3D data; + struct kvm_hv_tlb_range *range =3D data; =20 return hyperv_fill_flush_guest_mapping_list(flush, range->start_gfn, range->pages); } =20 static inline int hv_remote_flush_root_tdp(hpa_t root_tdp, - struct kvm_tlb_range *range) + struct kvm_hv_tlb_range *range) { if (range) return hyperv_flush_guest_mapping_range(root_tdp, @@ -29,7 +34,8 @@ static inline int hv_remote_flush_root_tdp(hpa_t root_tdp, return hyperv_flush_guest_mapping(root_tdp); } =20 -int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *rang= e) +static int __hv_flush_remote_tlbs_range(struct kvm *kvm, + struct kvm_hv_tlb_range *range) { struct kvm_arch *kvm_arch =3D &kvm->arch; struct kvm_vcpu *vcpu; @@ -85,11 +91,21 @@ int hv_flush_remote_tlbs_range(struct kvm *kvm, struct = kvm_tlb_range *range) spin_unlock(&kvm_arch->hv_root_tdp_lock); return ret; } + +int hv_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, gfn_t nr_= pages) +{ + struct kvm_hv_tlb_range range =3D { + .start_gfn =3D start_gfn, + .pages =3D nr_pages, + }; + + return __hv_flush_remote_tlbs_range(kvm, &range); +} EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs_range); =20 int hv_flush_remote_tlbs(struct kvm *kvm) { - return hv_flush_remote_tlbs_range(kvm, NULL); + return __hv_flush_remote_tlbs_range(kvm, NULL); } EXPORT_SYMBOL_GPL(hv_flush_remote_tlbs); =20 diff --git a/arch/x86/kvm/kvm_onhyperv.h b/arch/x86/kvm/kvm_onhyperv.h index 55d7fcb84cc1..ff127d313242 100644 --- a/arch/x86/kvm/kvm_onhyperv.h +++ b/arch/x86/kvm/kvm_onhyperv.h @@ -7,7 +7,7 @@ #define __ARCH_X86_KVM_KVM_ONHYPERV_H__ =20 #if IS_ENABLED(CONFIG_HYPERV) -int hv_flush_remote_tlbs_range(struct kvm *kvm, struct kvm_tlb_range *rang= e); +int hv_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn, gfn_t nr_pages); int hv_flush_remote_tlbs(struct kvm *kvm); void hv_track_root_tdp(struct kvm_vcpu *vcpu, hpa_t root_tdp); #else /* !CONFIG_HYPERV */ diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 7654be48ff69..a7adbac0855c 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -278,15 +278,11 @@ static inline bool kvm_available_flush_remote_tlbs_ra= nge(void) void kvm_flush_remote_tlbs_range(struct kvm *kvm, gfn_t start_gfn, gfn_t nr_pages) { - struct kvm_tlb_range range; int ret =3D -EOPNOTSUPP; =20 - range.start_gfn =3D start_gfn; - range.pages =3D nr_pages; - if (kvm_x86_ops.flush_remote_tlbs_range) - ret =3D static_call(kvm_x86_flush_remote_tlbs_range)(kvm, &range); - + ret =3D static_call(kvm_x86_flush_remote_tlbs_range)(kvm, start_gfn, + nr_pages); if (ret) kvm_flush_remote_tlbs(kvm); } --=20 2.40.0.348.gf938b09366-goog