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 X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 022E3C433E4 for ; Mon, 22 Jun 2020 20:09:34 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id B635D2075A for ; Mon, 22 Jun 2020 20:09:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B635D2075A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 6FD624B0E6; Mon, 22 Jun 2020 16:09:33 -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 2ZgGa0hy+LLm; Mon, 22 Jun 2020 16:09:32 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 0ADBF4B0EE; Mon, 22 Jun 2020 16:09:27 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id EA95B4B0FC for ; Mon, 22 Jun 2020 16:09:24 -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 yjtgxbX0oWxB for ; Mon, 22 Jun 2020 16:09:24 -0400 (EDT) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 081074B07F for ; Mon, 22 Jun 2020 16:09:20 -0400 (EDT) IronPort-SDR: BJAuQwTsyBeCToCHGasufy62qCAxgFHKyOPXHBi3zkJTxFPbP3yzaw7/JYM3JN7kgsgksH4HWe 8LfratuA5n/g== X-IronPort-AV: E=McAfee;i="6000,8403,9660"; a="142921351" X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="142921351" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jun 2020 13:09:20 -0700 IronPort-SDR: 9lb1mb9mxEscX1saY63XsGU3TxhVtNqdLqqSQ07jAHGDKrnhMT3aPfWkptn9OL0ez6NoddQ0V9 KhJIP5dw8KPw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,268,1589266800"; d="scan'208";a="318877121" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.152]) by FMSMGA003.fm.intel.com with ESMTP; 22 Jun 2020 13:09:20 -0700 From: Sean Christopherson To: Marc Zyngier , Paolo Bonzini , Arnd Bergmann Subject: [PATCH v2 17/21] KVM: arm64: Use common code's approach for __GFP_ZERO with memory caches Date: Mon, 22 Jun 2020 13:08:18 -0700 Message-Id: <20200622200822.4426-18-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200622200822.4426-1-sean.j.christopherson@intel.com> References: <20200622200822.4426-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Cc: linux-arch@vger.kernel.org, Junaid Shahid , Wanpeng Li , kvm@vger.kernel.org, Joerg Roedel , Peter Shier , linux-mips@vger.kernel.org, Sean Christopherson , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ben Gardon , Vitaly Kuznetsov , Peter Feiner , kvmarm@lists.cs.columbia.edu, Jim Mattson 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 Add a "gfp_zero" member to arm64's 'struct kvm_mmu_memory_cache' to make the struct and its usage compatible with the common 'struct kvm_mmu_memory_cache' in linux/kvm_host.h. This will minimize code churn when arm64 moves to the common implementation in a future patch, at the cost of temporarily having somewhat silly code. Note, GFP_PGTABLE_USER is equivalent to GFP_KERNEL_ACCOUNT | GFP_ZERO: #define GFP_PGTABLE_USER (GFP_PGTABLE_KERNEL | __GFP_ACCOUNT) | -> #define GFP_PGTABLE_KERNEL (GFP_KERNEL | __GFP_ZERO) == GFP_KERNEL | __GFP_ACCOUNT | __GFP_ZERO versus #define GFP_KERNEL_ACCOUNT (GFP_KERNEL | __GFP_ACCOUNT) with __GFP_ZERO explicitly OR'd in == GFP_KERNEL | __GFP_ACCOUNT | __GFP_ZERO No functional change intended. Tested-by: Marc Zyngier Signed-off-by: Sean Christopherson --- arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/arm.c | 2 ++ arch/arm64/kvm/mmu.c | 5 +++-- 3 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index c3e6fcc664b1..335170b59899 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -105,6 +105,7 @@ struct kvm_arch { */ struct kvm_mmu_memory_cache { int nobjs; + gfp_t gfp_zero; void *objects[KVM_NR_MEM_OBJS]; }; diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 90cb90561446..1016635b3782 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -270,6 +270,8 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) vcpu->arch.target = -1; bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); + vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO; + /* Set up the timer */ kvm_timer_vcpu_init(vcpu); diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 9398b66f8a87..688213ef34f0 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -131,7 +131,8 @@ static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache, int min) if (cache->nobjs >= min) return 0; while (cache->nobjs < ARRAY_SIZE(cache->objects)) { - page = (void *)__get_free_page(GFP_PGTABLE_USER); + page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT | + cache->gfp_zero); if (!page) return -ENOMEM; cache->objects[cache->nobjs++] = page; @@ -1342,7 +1343,7 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, phys_addr_t addr, end; int ret = 0; unsigned long pfn; - struct kvm_mmu_memory_cache cache = { 0, }; + struct kvm_mmu_memory_cache cache = { 0, __GFP_ZERO, }; end = (guest_ipa + size + PAGE_SIZE - 1) & PAGE_MASK; pfn = __phys_to_pfn(pa); -- 2.26.0 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm