From patchwork Wed Aug 18 12:06:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 12444255 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 37007C4320A for ; Wed, 18 Aug 2021 12:08:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D86660EBC for ; Wed, 18 Aug 2021 12:08:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236662AbhHRMIv (ORCPT ); Wed, 18 Aug 2021 08:08:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45364 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235981AbhHRMIX (ORCPT ); Wed, 18 Aug 2021 08:08:23 -0400 Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 16710C06179A for ; Wed, 18 Aug 2021 05:07:49 -0700 (PDT) Received: by mail-pj1-x102f.google.com with SMTP id n5so2452873pjt.4 for ; Wed, 18 Aug 2021 05:07:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dPJJmxsVnbJuWsaYefx+5ABSk3S/ct0HfhPILPNJBeY=; b=Il0dp2rPVUCBMX9KFhOtzGkP3WKDoZ1ZKEgN6kb2agZ8E5jDQdBcduO5z6+043hYpd Ufi8v00bjhHrLaYO9v2rUWDcl6NeckWKR50ZAjIC4vGPqrrZlcIMPniKBTLz+M0Ac2wW lvt2CQw2pwEwtNNuWnZO45Lx2NonUj7axKrI0LbgxlcXYK2MJA/2Yj/CJqtxZihF5DCw 5ze/wh02hcvuQ7d/Huk7Si32RAeQhRmnTq9PC//bqKcyMAfDvauBXt0nHLNbXlQDNDnQ 4Dsqf33aSduXN3Dv/itwrQsG8YwGNPtTScyWKAk0xLEiH1aFKpXXhY26VsmpguruySKm AP3w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dPJJmxsVnbJuWsaYefx+5ABSk3S/ct0HfhPILPNJBeY=; b=aDTe+C3CfZ8weyvXD21NG5mcvw1TbKb+yMyuSEaBHQ7w/DyWh9gK1ID8pnRVgiBYzR cxQaSzEoIkL6IVb/IeV+zUtOHYjRN7zQBtjkZutI0WIbMmSY2L0l82juTfp2d7T4UyAM 0Lw+sPzM2QqnmWqMv7+6WNbv7Uy4RXoolE7HH9Dm4spLRVzugH3nGI/nvZq2tkvzD2N2 dZMwxcgbXSrvkqlsf7a/fb8lbA6woFo/4Xs5D2pz8xvbprIMLtPfbsjYcGqwMqbyVnhc BmPCLqk4jnuTyxmotdOfNB3Q05nY2wIvcAR5Dexa+gCwMUN9xhGxRoxjDLaEkHPnl8Ci nDHA== X-Gm-Message-State: AOAM531x/Hjok58mB6Zgx35ea3i1fk/9zfPn7Do/RCWq1j7MJ9lP4ZfO CfPu5+XdOYhnN4hT2/+7BQIf X-Google-Smtp-Source: ABdhPJwcXSEuwzRnGhI2y+Q5IbLvbn5O9K+BcqEVJ6ubab8h4kSTKekrk2aFvZ2U2B+Ykcq6j6DPIA== X-Received: by 2002:a17:90b:378c:: with SMTP id mz12mr8802850pjb.187.1629288468662; Wed, 18 Aug 2021 05:07:48 -0700 (PDT) Received: from localhost ([139.177.225.253]) by smtp.gmail.com with ESMTPSA id c15sm5205386pjr.22.2021.08.18.05.07.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Aug 2021 05:07:48 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com, robin.murphy@arm.com Cc: songmuchun@bytedance.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v11 01/12] iova: Export alloc_iova_fast() and free_iova_fast() Date: Wed, 18 Aug 2021 20:06:31 +0800 Message-Id: <20210818120642.165-2-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210818120642.165-1-xieyongji@bytedance.com> References: <20210818120642.165-1-xieyongji@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Export alloc_iova_fast() and free_iova_fast() so that some modules can make use of the per-CPU cache to get rid of rbtree spinlock in alloc_iova() and free_iova() during IOVA allocation. Signed-off-by: Xie Yongji Acked-by: Jason Wang Acked-by: Will Deacon --- drivers/iommu/iova.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index b6cf5f16123b..3941ed6bb99b 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -521,6 +521,7 @@ alloc_iova_fast(struct iova_domain *iovad, unsigned long size, return new_iova->pfn_lo; } +EXPORT_SYMBOL_GPL(alloc_iova_fast); /** * free_iova_fast - free iova pfn range into rcache @@ -538,6 +539,7 @@ free_iova_fast(struct iova_domain *iovad, unsigned long pfn, unsigned long size) free_iova(iovad, pfn); } +EXPORT_SYMBOL_GPL(free_iova_fast); #define fq_ring_for_each(i, fq) \ for ((i) = (fq)->head; (i) != (fq)->tail; (i) = ((i) + 1) % IOVA_FQ_SIZE)