From patchwork Thu Dec 8 19:38:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Matlack X-Patchwork-Id: 13068731 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 2A344C001B2 for ; Thu, 8 Dec 2022 19:40:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230025AbiLHTkd (ORCPT ); Thu, 8 Dec 2022 14:40:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbiLHTkL (ORCPT ); Thu, 8 Dec 2022 14:40:11 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC4AA1AA06 for ; Thu, 8 Dec 2022 11:39:55 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-3d3769a8103so25014617b3.17 for ; Thu, 08 Dec 2022 11:39:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=dgqMnMt1QIlmBLa3o//o520F4RUXcCCtqFrzTbNkpWk=; b=f4QHeg61IzowzK+7yuPHF1TXnPTFwNskqnQKjcsu0WxAKIY1McB7wZRn+VuSfBM9b8 ylyyA9kcFWxQm6+GX+bMJZFHcWTGXb7YNV/fpxz2TqMv2QX/5/VLhbXkWs5BZNCv8lvE iAqaka88+2+N5tw21tP1s0c6lUAdukNFngVoXini/VGsGOpfrraDUlE9nKTf3FFTHm9y KUTGqSOH2A4NquRC0hECU12i0F9wQKuKP4xBOjtC4vxLFMrVdTK8VzxOC9xjDjBZVdgu 7TIFyQpSoyu3BW883wqt4S03Vt2JnLjwrIPiyoLIXLGjApjxjBQRjkRdpzCFxXjOiqSy 115A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=dgqMnMt1QIlmBLa3o//o520F4RUXcCCtqFrzTbNkpWk=; b=W9iI08f89RqsPaYxJsNERT7jLYDpKwXQt6z5iS2wdEqpobv6jBPdLGN7zWZhS2Jgrr xsoJgwFPwJBMUlIozZdiKC4f2CaaiFeZ8wPMKI6Fs5p2/XyQ+u89g2asMD2ntGumKe8f O+uCM1rWfkCwehVLFsLENkHxZWZ+YxHvgbltYh/RtK24CnEhmix0SaneA1+8zsVjes6R khb7M7nve4i6xXv4L87bPZ4Xc0CcAKLh+CxKSKACXQodwIxEnIvJvW+znKx//OzZAty+ 7EgJ5iUxBNBtx3MYcfm3Q5OxTxs1WmvfntWAWz6JN48XEXDrcxqISkWjc+eXgNYCAEmM X7xw== X-Gm-Message-State: ANoB5pnMDyk4YzIfCtQFoJ4RiIxWMiTXZ7arSuFk1h2O19V/Kr57pMP7 Y00Y+lJ3UUgXlSo26/tqaed3Wyf3fC2v+A== X-Google-Smtp-Source: AA0mqf5mi9mDJ9tYVtakRomun512INrgKlNeUrlvHGHQBPGnddPX6ZC9IDNboVvCBGP15bWz6s6DsMaL8j57qA== X-Received: from dmatlack-n2d-128.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:1309]) (user=dmatlack job=sendgmr) by 2002:a25:b885:0:b0:701:49ca:8ae8 with SMTP id w5-20020a25b885000000b0070149ca8ae8mr16438842ybj.553.1670528392392; Thu, 08 Dec 2022 11:39:52 -0800 (PST) Date: Thu, 8 Dec 2022 11:38:47 -0800 In-Reply-To: <20221208193857.4090582-1-dmatlack@google.com> Mime-Version: 1.0 References: <20221208193857.4090582-1-dmatlack@google.com> X-Mailer: git-send-email 2.39.0.rc1.256.g54fd8350bd-goog Message-ID: <20221208193857.4090582-28-dmatlack@google.com> Subject: [RFC PATCH 27/37] KVM: MMU: Move mmu_page_header_cache to common code From: David Matlack To: Paolo Bonzini Cc: Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Oliver Upton , Huacai Chen , Aleksandar Markovic , Anup Patel , Atish Patra , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Andrew Morton , David Matlack , Anshuman Khandual , Nadav Amit , "Matthew Wilcox (Oracle)" , Vlastimil Babka , "Liam R. Howlett" , Suren Baghdasaryan , Peter Xu , xu xin , Arnd Bergmann , Yu Zhao , Colin Cross , Hugh Dickins , Ben Gardon , Mingwei Zhang , Krish Sadhukhan , Ricardo Koller , Jing Zhang , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Move vcpu->arch.mmu_page_header_cache and its backing kmem_cache to common code in preparation for moving the TDP MMU to common code in a future commit. The kmem_cache is still only initialized and used on x86 for the time being to avoid affecting other architectures. A future commit can move the code to manage this cache to common code. No functional change intended. Signed-off-by: David Matlack --- arch/x86/kvm/mmu/mmu.c | 11 +++++------ arch/x86/kvm/mmu/mmu_internal.h | 2 -- arch/x86/kvm/mmu/tdp_mmu.c | 2 +- include/kvm/mmu.h | 2 ++ include/linux/kvm_host.h | 3 +++ virt/kvm/kvm_main.c | 1 + 6 files changed, 12 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index a845e9141ad4..f01ee01f3509 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -163,7 +163,6 @@ struct kvm_shadow_walk_iterator { __shadow_walk_next(&(_walker), spte)) static struct kmem_cache *pte_list_desc_cache; -struct kmem_cache *mmu_page_header_cache; static struct percpu_counter kvm_total_used_mmu_pages; static void mmu_spte_set(u64 *sptep, u64 spte); @@ -674,7 +673,7 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu, bool maybe_indirect) if (r) return r; } - return kvm_mmu_topup_memory_cache(&vcpu->arch.mmu_page_header_cache, + return kvm_mmu_topup_memory_cache(&vcpu->mmu_page_header_cache, PT64_ROOT_MAX_LEVEL); } @@ -683,7 +682,7 @@ static void mmu_free_memory_caches(struct kvm_vcpu *vcpu) kvm_mmu_free_memory_cache(&vcpu->arch.mmu_pte_list_desc_cache); kvm_mmu_free_memory_cache(&vcpu->mmu_page_table_cache); kvm_mmu_free_memory_cache(&vcpu->arch.mmu_shadowed_info_cache); - kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_header_cache); + kvm_mmu_free_memory_cache(&vcpu->mmu_page_header_cache); } static void mmu_free_pte_list_desc(struct pte_list_desc *pte_list_desc) @@ -2217,7 +2216,7 @@ static struct kvm_mmu_page *kvm_mmu_get_shadow_page(struct kvm_vcpu *vcpu, union kvm_mmu_page_role role) { struct shadow_page_caches caches = { - .page_header_cache = &vcpu->arch.mmu_page_header_cache, + .page_header_cache = &vcpu->mmu_page_header_cache, .shadow_page_cache = &vcpu->mmu_page_table_cache, .shadowed_info_cache = &vcpu->arch.mmu_shadowed_info_cache, }; @@ -5917,8 +5916,8 @@ int kvm_mmu_create(struct kvm_vcpu *vcpu) vcpu->arch.mmu_pte_list_desc_cache.kmem_cache = pte_list_desc_cache; vcpu->arch.mmu_pte_list_desc_cache.gfp_zero = __GFP_ZERO; - vcpu->arch.mmu_page_header_cache.kmem_cache = mmu_page_header_cache; - vcpu->arch.mmu_page_header_cache.gfp_zero = __GFP_ZERO; + vcpu->mmu_page_header_cache.kmem_cache = mmu_page_header_cache; + vcpu->mmu_page_header_cache.gfp_zero = __GFP_ZERO; vcpu->mmu_page_table_cache.gfp_zero = __GFP_ZERO; diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index d3c1d08002af..4aa60d5d87b0 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -44,8 +44,6 @@ extern bool dbg; #define INVALID_PAE_ROOT 0 #define IS_VALID_PAE_ROOT(x) (!!(x)) -extern struct kmem_cache *mmu_page_header_cache; - static inline bool kvm_mmu_page_ad_need_write_protect(struct kvm_mmu_page *sp) { /* diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 922815407b7e..891877a6fb78 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -263,7 +263,7 @@ static struct kvm_mmu_page *tdp_mmu_alloc_sp(struct kvm_vcpu *vcpu) { struct kvm_mmu_page *sp; - sp = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache); + sp = kvm_mmu_memory_cache_alloc(&vcpu->mmu_page_header_cache); sp->spt = kvm_mmu_memory_cache_alloc(&vcpu->mmu_page_table_cache); return sp; diff --git a/include/kvm/mmu.h b/include/kvm/mmu.h index 425db8e4f8e9..f1416828f8fe 100644 --- a/include/kvm/mmu.h +++ b/include/kvm/mmu.h @@ -4,6 +4,8 @@ #include +extern struct kmem_cache *mmu_page_header_cache; + static inline struct kvm_mmu_page *to_shadow_page(hpa_t shadow_page) { struct page *page = pfn_to_page((shadow_page) >> PAGE_SHIFT); diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 0a9baa493760..ec3a6de6d54e 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -391,6 +391,9 @@ struct kvm_vcpu { #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE /* Cache used to allocate pages for use as page tables. */ struct kvm_mmu_memory_cache mmu_page_table_cache; + + /* Cache used to allocate kvm_mmu_page structs. */ + struct kvm_mmu_memory_cache mmu_page_header_cache; #endif }; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 954ab969f55e..0f1d48ed7d57 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -108,6 +108,7 @@ static int kvm_usage_count; static atomic_t hardware_enable_failed; static struct kmem_cache *kvm_vcpu_cache; +struct kmem_cache *mmu_page_header_cache; static __read_mostly struct preempt_ops kvm_preempt_ops; static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_running_vcpu);