From patchwork Tue Jul 18 23:44:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13317926 X-Patchwork-Delegate: paul@paul-moore.com 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 57DFDEB64DC for ; Tue, 18 Jul 2023 23:49:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230254AbjGRXti (ORCPT ); Tue, 18 Jul 2023 19:49:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230024AbjGRXtP (ORCPT ); Tue, 18 Jul 2023 19:49:15 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A6EA1BD9 for ; Tue, 18 Jul 2023 16:48:42 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-cf4cb742715so68170276.2 for ; Tue, 18 Jul 2023 16:48:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689724121; x=1692316121; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=Egm/XxJ8ddWbI/DaWjAWd8f37iIZoXJS+wUVmFcRAns=; b=jmuY9roKZMyFhtYvPEoDziDnCcR7JdYNk6MHm5cFsWzUI97GEXVLYK1GdjIllbAuc8 4ySkYVESTYqTzNduR8YSId27LdhHiTgoO/QliIr5NJBmEYoJ3hqAD7mwOWzvFkUx4Bii goVBiLBONUuy9TatGLx00I5NjhWHSEHqUSiN1WkdO1FULfalsZjiiUrIy35lsmGM8gg5 0R9io78Au8wj9A4RGlGH7FDc+jn67CVyDvAeFJPAeD6X9/PbcbAdX5be8ZMA4OH8wO2X REDfKC9pVZc7WTJWTP+0UyFThTKKDkHpI7he51JmdU9wLJq3gXsen7d9rft5gMUHTkyh wERA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689724121; x=1692316121; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Egm/XxJ8ddWbI/DaWjAWd8f37iIZoXJS+wUVmFcRAns=; b=YEZZTXET7leNelZ8Tvq7duVIyUQy/LXeLgaTIHfgD1f/iDxOIUVGCntaCjkulGMIeI 75ROkHrHt7dHkv59ZxrUkTe4LOhyfHjNYBCgSqOxc0KVsT8d2+RVAQDlDvfcK4RAJrbH YtOyq22L+S2lPkR+21fvyXm6W0v8qpso8P/0wegPHRU1vrWTBrrS3Q+ESl8yMU5oYmwF wrKcD5xDiDxr+xqwivEly1rQvnsffxSzDkreJ/cb0neUsXZaHItJG6opAfLSxbqGXO5H Mkv1C5kke8PVDnrJYVFnw8nZ4wDz4AN7aos9e7ben1gx8HM0rR1BWrd8zXGnpLcTbOMl vVwQ== X-Gm-Message-State: ABy/qLb0gK53Zvi5/8b+Um2lFiby3ZBCCbxL6ienLDWoZuKT7wXf23k+ rOVoYnouRyMcTNMdEKgGitH1nlZhXw4= X-Google-Smtp-Source: APBJJlFh2D+dQAa/XLO1xU2e6kFsryQ3DCD95rOJdVXmpZcOUWfUGVGQg2QmRxbQ3p6/rJNCJuKy9Jt0/xg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:1005:b0:c5d:2623:560e with SMTP id w5-20020a056902100500b00c5d2623560emr14047ybt.12.1689724121300; Tue, 18 Jul 2023 16:48:41 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 18 Jul 2023 16:44:48 -0700 In-Reply-To: <20230718234512.1690985-1-seanjc@google.com> Mime-Version: 1.0 References: <20230718234512.1690985-1-seanjc@google.com> X-Mailer: git-send-email 2.41.0.255.g8b1d071c50-goog Message-ID: <20230718234512.1690985-6-seanjc@google.com> Subject: [RFC PATCH v11 05/29] KVM: Convert KVM_ARCH_WANT_MMU_NOTIFIER to CONFIG_KVM_GENERIC_MMU_NOTIFIER From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , "Matthew Wilcox (Oracle)" , Andrew Morton , Paul Moore , James Morris , "Serge E. Hallyn" Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Chao Peng , Fuad Tabba , Jarkko Sakkinen , Yu Zhang , Vishal Annapurve , Ackerley Tng , Maciej Szmigiero , Vlastimil Babka , David Hildenbrand , Quentin Perret , Michael Roth , Wang , Liam Merwick , Isaku Yamahata , "Kirill A . Shutemov" Precedence: bulk List-ID: Signed-off-by: Sean Christopherson --- arch/arm64/include/asm/kvm_host.h | 2 -- arch/arm64/kvm/Kconfig | 2 +- arch/mips/include/asm/kvm_host.h | 2 -- arch/mips/kvm/Kconfig | 2 +- arch/powerpc/include/asm/kvm_host.h | 2 -- arch/powerpc/kvm/Kconfig | 8 ++++---- arch/powerpc/kvm/powerpc.c | 4 +--- arch/riscv/include/asm/kvm_host.h | 2 -- arch/riscv/kvm/Kconfig | 2 +- arch/x86/include/asm/kvm_host.h | 2 -- arch/x86/kvm/Kconfig | 2 +- include/linux/kvm_host.h | 8 +++++--- virt/kvm/Kconfig | 4 ++++ virt/kvm/kvm_main.c | 10 +++++----- 14 files changed, 23 insertions(+), 29 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 8b6096753740..50d89d400bf1 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -912,8 +912,6 @@ int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, struct kvm_vcpu_events *events); -#define KVM_ARCH_WANT_MMU_NOTIFIER - void kvm_arm_halt_guest(struct kvm *kvm); void kvm_arm_resume_guest(struct kvm *kvm); diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index f531da6b362e..a650b46f4f2f 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -22,7 +22,7 @@ menuconfig KVM bool "Kernel-based Virtual Machine (KVM) support" depends on HAVE_KVM select KVM_GENERIC_HARDWARE_ENABLING - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select PREEMPT_NOTIFIERS select HAVE_KVM_CPU_RELAX_INTERCEPT select HAVE_KVM_ARCH_TLB_FLUSH_ALL diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 04cedf9f8811..22a41d941bf3 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -810,8 +810,6 @@ int kvm_mips_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn); pgd_t *kvm_pgd_alloc(void); void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu); -#define KVM_ARCH_WANT_MMU_NOTIFIER - /* Emulation */ enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause); int kvm_get_badinstr(u32 *opc, struct kvm_vcpu *vcpu, u32 *out); diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig index a8cdba75f98d..c04987d2ed2e 100644 --- a/arch/mips/kvm/Kconfig +++ b/arch/mips/kvm/Kconfig @@ -25,7 +25,7 @@ config KVM select HAVE_KVM_EVENTFD select HAVE_KVM_VCPU_ASYNC_IOCTL select KVM_MMIO - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select INTERVAL_TREE select KVM_GENERIC_HARDWARE_ENABLING help diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 14ee0dece853..4b5c3f2acf78 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -62,8 +62,6 @@ #include -#define KVM_ARCH_WANT_MMU_NOTIFIER - #define HPTEG_CACHE_NUM (1 << 15) #define HPTEG_HASH_BITS_PTE 13 #define HPTEG_HASH_BITS_PTE_LONG 12 diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index 902611954200..b33358ee6424 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -42,7 +42,7 @@ config KVM_BOOK3S_64_HANDLER config KVM_BOOK3S_PR_POSSIBLE bool select KVM_MMIO - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER config KVM_BOOK3S_HV_POSSIBLE bool @@ -85,7 +85,7 @@ config KVM_BOOK3S_64_HV tristate "KVM for POWER7 and later using hypervisor mode in host" depends on KVM_BOOK3S_64 && PPC_POWERNV select KVM_BOOK3S_HV_POSSIBLE - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select CMA help Support running unmodified book3s_64 guest kernels in @@ -194,7 +194,7 @@ config KVM_E500V2 depends on !CONTEXT_TRACKING_USER select KVM select KVM_MMIO - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER help Support running unmodified E500 guest kernels in virtual machines on E500v2 host processors. @@ -211,7 +211,7 @@ config KVM_E500MC select KVM select KVM_MMIO select KVM_BOOKE_HV - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER help Support running unmodified E500MC/E5500/E6500 guest kernels in virtual machines on E500MC/E5500/E6500 host processors. diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 5cf9e5e3112a..f97fbac7eac9 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -635,9 +635,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE r = hv_enabled; #else -#ifndef KVM_ARCH_WANT_MMU_NOTIFIER - BUILD_BUG(); -#endif + BUILD_BUG_ON(!IS_ENABLED(CONFIG_KVM_GENERIC_MMU_NOTIFIER)); r = 1; #endif break; diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 2d8ee53b66c7..6ddaf0b9278c 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -249,8 +249,6 @@ struct kvm_vcpu_arch { static inline void kvm_arch_sync_events(struct kvm *kvm) {} static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} -#define KVM_ARCH_WANT_MMU_NOTIFIER - #define KVM_RISCV_GSTAGE_TLB_MIN_ORDER 12 void kvm_riscv_local_hfence_gvma_vmid_gpa(unsigned long vmid, diff --git a/arch/riscv/kvm/Kconfig b/arch/riscv/kvm/Kconfig index dfc237d7875b..ae2e05f050ec 100644 --- a/arch/riscv/kvm/Kconfig +++ b/arch/riscv/kvm/Kconfig @@ -30,7 +30,7 @@ config KVM select KVM_GENERIC_HARDWARE_ENABLING select KVM_MMIO select KVM_XFER_TO_GUEST_WORK - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select PREEMPT_NOTIFIERS help Support hosting virtualized guest machines. diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 28bd38303d70..f9a927296d85 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -2110,8 +2110,6 @@ enum { # define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, 0) #endif -#define KVM_ARCH_WANT_MMU_NOTIFIER - int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v); int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu); int kvm_cpu_has_extint(struct kvm_vcpu *v); diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 89ca7f4c1464..a7eb2bdbfb18 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -24,7 +24,7 @@ config KVM depends on HIGH_RES_TIMERS depends on X86_LOCAL_APIC select PREEMPT_NOTIFIERS - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER select HAVE_KVM_IRQCHIP select HAVE_KVM_PFNCACHE select HAVE_KVM_IRQFD diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 90a0be261a5c..d2d3e083ec7f 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -255,7 +255,9 @@ bool kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu); #endif -#ifdef KVM_ARCH_WANT_MMU_NOTIFIER +struct kvm_gfn_range; + +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER struct kvm_gfn_range { struct kvm_memory_slot *slot; gfn_t start; @@ -784,7 +786,7 @@ struct kvm { struct hlist_head irq_ack_notifier_list; #endif -#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER struct mmu_notifier mmu_notifier; unsigned long mmu_invalidate_seq; long mmu_invalidate_in_progress; @@ -1916,7 +1918,7 @@ extern const struct _kvm_stats_desc kvm_vm_stats_desc[]; extern const struct kvm_stats_header kvm_vcpu_stats_header; extern const struct _kvm_stats_desc kvm_vcpu_stats_desc[]; -#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER static inline int mmu_invalidate_retry(struct kvm *kvm, unsigned long mmu_seq) { if (unlikely(kvm->mmu_invalidate_in_progress)) diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index b74916de5183..2fa11bd26cfc 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -95,3 +95,7 @@ config HAVE_KVM_PM_NOTIFIER config KVM_GENERIC_HARDWARE_ENABLING bool + +config KVM_GENERIC_MMU_NOTIFIER + select MMU_NOTIFIER + bool diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 8101b11a13ba..53346bc2902a 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -510,7 +510,7 @@ void kvm_destroy_vcpus(struct kvm *kvm) } EXPORT_SYMBOL_GPL(kvm_destroy_vcpus); -#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) { return container_of(mn, struct kvm, mmu_notifier); @@ -938,14 +938,14 @@ static int kvm_init_mmu_notifier(struct kvm *kvm) return mmu_notifier_register(&kvm->mmu_notifier, current->mm); } -#else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ +#else /* !CONFIG_KVM_GENERIC_MMU_NOTIFIER */ static int kvm_init_mmu_notifier(struct kvm *kvm) { return 0; } -#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ +#endif /* CONFIG_KVM_GENERIC_MMU_NOTIFIER */ #ifdef CONFIG_HAVE_KVM_PM_NOTIFIER static int kvm_pm_notifier_call(struct notifier_block *bl, @@ -1265,7 +1265,7 @@ static struct kvm *kvm_create_vm(unsigned long type, const char *fdname) out_err_no_debugfs: kvm_coalesced_mmio_free(kvm); out_no_coalesced_mmio: -#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER if (kvm->mmu_notifier.ops) mmu_notifier_unregister(&kvm->mmu_notifier, current->mm); #endif @@ -1325,7 +1325,7 @@ static void kvm_destroy_vm(struct kvm *kvm) kvm->buses[i] = NULL; } kvm_coalesced_mmio_free(kvm); -#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) +#ifdef CONFIG_KVM_GENERIC_MMU_NOTIFIER mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); /* * At this point, pending calls to invalidate_range_start()