From patchwork Mon May 16 23:21:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Matlack X-Patchwork-Id: 12851744 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 9A394C433EF for ; Mon, 16 May 2022 23:22:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350450AbiEPXWU (ORCPT ); Mon, 16 May 2022 19:22:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350356AbiEPXWF (ORCPT ); Mon, 16 May 2022 19:22:05 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0CF3846B31 for ; Mon, 16 May 2022 16:21:58 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id d10-20020a17090a7bca00b001df1d7dd8cfso3611221pjl.8 for ; Mon, 16 May 2022 16:21:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=bjfKVQfFw+YVVLZ97EII30OJ+Br3uJ0BC6may3PgpYs=; b=R4/AJWKf2qGzFXsfnVKiM4NNw7/pARoBX+tBkZuy41e0vtzqxlmnCIrHsQyNeZoskD XraDZ4xEbhjWRsO4ud9nIRt+pA+wjqK5o3fIn1CK+p4lU+dGKQwWq/iDt1GIxFlr9B1a 2Wjxmd3k+bw3KcOa/o+3zb2uocmxn4vCpjhW5cJjw755kBixn+PUy7UQLVaDgbIRwymi tIyc5O33fJZZLDGodsZHg1OB/7JDFWtI2q0O92V3K2/AfimK7Q/3LY69R1mtjOY9NgXg 2fqt7x/qSXIUWrSEnkNpXDG1ie6gjpa+pnne4MgjFqbedNT0TUIHSa0CoxNXTs3IHyAD Wd7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=bjfKVQfFw+YVVLZ97EII30OJ+Br3uJ0BC6may3PgpYs=; b=59ezwOYVcyoYZi5pM/fXeKNGHNULBEk45GMlBSXUr8MqKBE8xbKRxDBHFC080x7VIt vnC3QoOGGsH43oAyNWUbTh3cf4uZACGDV398FwmtfC8Emh+C9p3fNcy5zLf7KkS/GwUC Ha4npODFdOm8lJs6bVZHCe0e5RVQapsMFUaV3rsfiGzJPjEMsM30BSLUiBEhkAD7eSBD ejCRGuAxOJHV/qpGeMGwMffheBdAlRDKQBV65Vrj01lR2DDOQFVpQ8gu451nlY3HEGOI crmlfgMwhu1O1wy840X22pIwLQjS0n8X376mnFtTApclGr7OftPqkMkI5R5ix51x3tpg hxlg== X-Gm-Message-State: AOAM533JtzecXdnzAFiVNt8lJq5+6JLdnfdKdzwYpyRt3t1k+DaN40aj vZTWaJiyNO74GxbVawLMonhI/QrEc2G6BA== X-Google-Smtp-Source: ABdhPJyvVuGCncfVPBz1KFyVt0l5qHY6IpW2GqHJPL6xkWghdrwJY5Nn6kxvrEpBk+Mmnzjq21O5/WGcXwqEMQ== X-Received: from dmatlack-heavy.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:19cd]) (user=dmatlack job=sendgmr) by 2002:a17:90b:3654:b0:1db:fc80:584d with SMTP id nh20-20020a17090b365400b001dbfc80584dmr32992556pjb.215.1652743317317; Mon, 16 May 2022 16:21:57 -0700 (PDT) Date: Mon, 16 May 2022 23:21:26 +0000 In-Reply-To: <20220516232138.1783324-1-dmatlack@google.com> Message-Id: <20220516232138.1783324-11-dmatlack@google.com> Mime-Version: 1.0 References: <20220516232138.1783324-1-dmatlack@google.com> X-Mailer: git-send-email 2.36.0.550.gb090851708-goog Subject: [PATCH v6 10/22] KVM: x86/mmu: Pass memory caches to allocate SPs separately From: David Matlack To: Paolo Bonzini Cc: Marc Zyngier , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Sean Christopherson , Andrew Jones , Ben Gardon , Peter Xu , maciej.szmigiero@oracle.com, "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" , "open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)" , "open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)" , "open list:KERNEL VIRTUAL MACHINE FOR RISC-V (KVM/riscv)" , Peter Feiner , Lai Jiangshan , David Matlack Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Refactor kvm_mmu_alloc_shadow_page() to receive the caches from which it will allocate the various pieces of memory for shadow pages as a parameter, rather than deriving them from the vcpu pointer. This will be useful in a future commit where shadow pages are allocated during VM ioctls for eager page splitting, and thus will use a different set of caches. Preemptively pull the caches out all the way to kvm_mmu_get_shadow_page() since eager page splitting will not be calling kvm_mmu_alloc_shadow_page() directly. No functional change intended. Signed-off-by: David Matlack Reviewed-by: Sean Christopherson --- arch/x86/kvm/mmu/mmu.c | 36 +++++++++++++++++++++++++++++------- 1 file changed, 29 insertions(+), 7 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 6a3b1b00f02b..bad4dd5aa051 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -2075,17 +2075,25 @@ static struct kvm_mmu_page *kvm_mmu_find_shadow_page(struct kvm_vcpu *vcpu, return sp; } +/* Caches used when allocating a new shadow page. */ +struct shadow_page_caches { + struct kvm_mmu_memory_cache *page_header_cache; + struct kvm_mmu_memory_cache *shadow_page_cache; + struct kvm_mmu_memory_cache *gfn_array_cache; +}; + static struct kvm_mmu_page *kvm_mmu_alloc_shadow_page(struct kvm_vcpu *vcpu, + struct shadow_page_caches *caches, gfn_t gfn, struct hlist_head *sp_list, union kvm_mmu_page_role role) { struct kvm_mmu_page *sp; - sp = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_page_header_cache); - sp->spt = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_shadow_page_cache); + sp = kvm_mmu_memory_cache_alloc(caches->page_header_cache); + sp->spt = kvm_mmu_memory_cache_alloc(caches->shadow_page_cache); if (!role.direct) - sp->gfns = kvm_mmu_memory_cache_alloc(&vcpu->arch.mmu_gfn_array_cache); + sp->gfns = kvm_mmu_memory_cache_alloc(caches->gfn_array_cache); set_page_private(virt_to_page(sp->spt), (unsigned long)sp); @@ -2107,9 +2115,10 @@ static struct kvm_mmu_page *kvm_mmu_alloc_shadow_page(struct kvm_vcpu *vcpu, return sp; } -static struct kvm_mmu_page *kvm_mmu_get_shadow_page(struct kvm_vcpu *vcpu, - gfn_t gfn, - union kvm_mmu_page_role role) +static struct kvm_mmu_page *__kvm_mmu_get_shadow_page(struct kvm_vcpu *vcpu, + struct shadow_page_caches *caches, + gfn_t gfn, + union kvm_mmu_page_role role) { struct hlist_head *sp_list; struct kvm_mmu_page *sp; @@ -2120,13 +2129,26 @@ static struct kvm_mmu_page *kvm_mmu_get_shadow_page(struct kvm_vcpu *vcpu, sp = kvm_mmu_find_shadow_page(vcpu, gfn, sp_list, role); if (!sp) { created = true; - sp = kvm_mmu_alloc_shadow_page(vcpu, gfn, sp_list, role); + sp = kvm_mmu_alloc_shadow_page(vcpu, caches, gfn, sp_list, role); } trace_kvm_mmu_get_page(sp, created); return sp; } +static struct kvm_mmu_page *kvm_mmu_get_shadow_page(struct kvm_vcpu *vcpu, + gfn_t gfn, + union kvm_mmu_page_role role) +{ + struct shadow_page_caches caches = { + .page_header_cache = &vcpu->arch.mmu_page_header_cache, + .shadow_page_cache = &vcpu->arch.mmu_shadow_page_cache, + .gfn_array_cache = &vcpu->arch.mmu_gfn_array_cache, + }; + + return __kvm_mmu_get_shadow_page(vcpu, &caches, gfn, role); +} + static union kvm_mmu_page_role kvm_mmu_child_role(u64 *sptep, bool direct, u32 access) { struct kvm_mmu_page *parent_sp = sptep_to_sp(sptep);