From mboxrd@z Thu Jan 1 00:00:00 1970 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 mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4E17C433EF for ; Sat, 14 May 2022 10:09:09 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 850994B137; Sat, 14 May 2022 06:09:09 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mz9SfXJkcnT9; Sat, 14 May 2022 06:09:08 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D61F14B231; Sat, 14 May 2022 06:08:56 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 7B5AF49EF6 for ; Fri, 13 May 2022 16:28:47 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1bjvL7fsyMto for ; Fri, 13 May 2022 16:28:46 -0400 (EDT) Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 559424B137 for ; Fri, 13 May 2022 16:28:46 -0400 (EDT) Received: by mail-pf1-f201.google.com with SMTP id g5-20020a62e305000000b0050d2dba0c5dso4469049pfh.8 for ; Fri, 13 May 2022 13:28:46 -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=Q2iE0Cxpa01PZtydAP3+0EHT9/ovzFKtM4CTxOqopNo=; b=kBtgOZb6L01L9Scbsk0n3b6QXUjGTLwW6lXEIWk5vM2VilLkNRKTThEc67CyICmcwF vcTVppd0iFdeeb7Mmnohtzf86ll0NLPKIcb7HUv41efPtdWaC1ZEjj4ncSlKRpTNQnpT IuzmjMIAHKXiE33XdF3CkiVjrjYuKO5/cEELlNw3aYcqjBupe4yRnxeO+cS9LVBdF/hc V4ThqGXHdwel8AZNGb+m+R0GgCp0iEuSIz5bzLEtilh6UiTkOKdKCw1qHh5j+KPoBR2Q sL1eCqMeYRkaY5jCFp8Dfe8PAjC3dwvlrjkPo8fMjPM2zM96H1fjPXQyAwNdAKOdvh6T fLEQ== 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=Q2iE0Cxpa01PZtydAP3+0EHT9/ovzFKtM4CTxOqopNo=; b=j+hVU3fzR2KSC9z/wlbvJIYpcXbTOJawR33uk0kdXrCHBF6LRtiSvX5sg7GPdDDvmI 5DgoRl6YBvmSmg8SOpWPsJMtRO2E2CWrKVOObGeTm6RJmWPjymbIMFfLp3AZzVnYKyrF l+K4FBr3ZHz6hEGoCR8tnUQi9MzvvWRjk0zHtkCi3isBXCBhDxjN24Nm0hMJ1AE/ydvM EvzuSHjjm36UBVQQWqrTZY2uIGHANK9h/X0JcDmKa88qELdye4AB2fKiAW/lWJcJ0em4 XdzFizQR2w3x7T1U4F1+j3rufbst/WMNpo8gx/mC5h74K+j9R6Fl2nguWFt4n5Pk3HPt kxuA== X-Gm-Message-State: AOAM530wKys0cgnGEW+wT/sIKDxQZAGHmbCOCknhpd+LcKPyMI8i7Ba+ IfCLKhNEbtD2tyeYB7eEKDC4OIa531b/CQ== X-Google-Smtp-Source: ABdhPJwh6exFnjxzxfjImvwwYdeFhG/KUqrwnYKnvqBxa4wxH/fbyWqIfWK/ivcZQfvxLjg8cRc5PB46PP8o3w== X-Received: from dmatlack-heavy.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:19cd]) (user=dmatlack job=sendgmr) by 2002:a17:90b:3b46:b0:1dc:b314:52e6 with SMTP id ot6-20020a17090b3b4600b001dcb31452e6mr6594921pjb.134.1652473725945; Fri, 13 May 2022 13:28:45 -0700 (PDT) Date: Fri, 13 May 2022 20:28:07 +0000 In-Reply-To: <20220513202819.829591-1-dmatlack@google.com> Message-Id: <20220513202819.829591-10-dmatlack@google.com> Mime-Version: 1.0 References: <20220513202819.829591-1-dmatlack@google.com> X-Mailer: git-send-email 2.36.0.550.gb090851708-goog Subject: [PATCH v5 09/21] KVM: x86/mmu: Pass memory caches to allocate SPs separately From: David Matlack To: Paolo Bonzini X-Mailman-Approved-At: Sat, 14 May 2022 06:08:54 -0400 Cc: Albert Ou , "open list:KERNEL VIRTUAL MACHINE FOR MIPS \(KVM/mips\)" , Marc Zyngier , Huacai Chen , Lai Jiangshan , "open list:KERNEL VIRTUAL MACHINE FOR MIPS \(KVM/mips\)" , David Matlack , Aleksandar Markovic , Palmer Dabbelt , "open list:KERNEL VIRTUAL MACHINE FOR RISC-V \(KVM/riscv\)" , Paul Walmsley , Ben Gardon , maciej.szmigiero@oracle.com, "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 \(KVM/arm64\)" , Peter Feiner X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu 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 --- 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 16001b019e1a..44431c0b797f 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); -- 2.36.0.550.gb090851708-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm