From patchwork Mon Aug 30 14:17:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 504573 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,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 B497AC43216 for ; Mon, 30 Aug 2021 14:22:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9F17560F46 for ; Mon, 30 Aug 2021 14:22:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237171AbhH3OWz (ORCPT ); Mon, 30 Aug 2021 10:22:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237015AbhH3OWw (ORCPT ); Mon, 30 Aug 2021 10:22:52 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D40DC061575 for ; Mon, 30 Aug 2021 07:21:58 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id m26so12360755pff.3 for ; Mon, 30 Aug 2021 07:21:58 -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=9VYKP4BtY52G/QfxOL4ci9LsSwqIuUiAxga6ojIUWhM=; b=rX/n04t3hwSmIEK5sY0o788rpIpjsNj/ric5w+RL9Y5fd/jrKYfgCowq9OT4EPJXpk WSehnR/Xk3PPjq51bpOHzx0/XcgTsukhRVdAIRbRcmIJAPf8qutfloXIY/3jQ53FkcVL uwGwFmQP21tYDGlvAxMdHr7T41mY372Mjmfup9xPngYq8Z43+grlgY7MS7s1iD4/p0Te +8mY7L2idpk4uVCt/dNg0r1w6tzsrVR+1eRlwcIdxQ3ekrh6djsf+qArQ9r5h2HE9vv5 jsSLq/DZd1qxkCzIjIlZR4dqRACGMiEOp+BtamDSNL5nugEl97bDkHPo0M8LPanXAhNC JTmQ== 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=9VYKP4BtY52G/QfxOL4ci9LsSwqIuUiAxga6ojIUWhM=; b=e/nKbvU9scolQikXxSSb6CqalPlYANRWgk5DStrfIFnRDRvm2R2/vPvIVCj7Dwhnvf rapf337hucOMlL/UF/pIJYSkXgtC8ecwh52v3iLAHaT0c2xXNghhvH+nFSowRqlWC2kh ApyoWakEMXmf77a6kxw0DryZk0pyd48aGH28z84xNhZ6PpBDRipUQKoZO7w5fVzpRYfQ ij/fhkHepYAFt6icxSqy9TPpKdtjkIbHL1cLImFmrrolOECDSDypCWhkgs4FB6wKtO2h FNuFWjv3eEIHqNmB8SnuJ1BbGYjNNse0+Yl19VLOvOL6x+D/km3nGATdWzfz3+y8FRBg 4gQA== X-Gm-Message-State: AOAM530vHE4o4ArvdMKxu1z54/fBGgXFj6IAs5ut8sgUZKBP2deBlYAv hxFmvnDzj8slQsWbQCC2rVBr X-Google-Smtp-Source: ABdhPJxsbkcgJHKC9l8Nzp6aGuWpGOLQSR5SX63hdPPAsp+Np9TJgCk3tFS4YemV8vWYWRm1YrsWxw== X-Received: by 2002:a63:4cd:: with SMTP id 196mr22087854pge.239.1630333317896; Mon, 30 Aug 2021 07:21:57 -0700 (PDT) Received: from localhost ([139.177.225.237]) by smtp.gmail.com with ESMTPSA id gc20sm10539505pjb.17.2021.08.30.07.21.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Aug 2021 07:21:57 -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, will@kernel.org, john.garry@huawei.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 v12 01/13] iova: Export alloc_iova_fast() and free_iova_fast() Date: Mon, 30 Aug 2021 22:17:25 +0800 Message-Id: <20210830141737.181-2-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210830141737.181-1-xieyongji@bytedance.com> References: <20210830141737.181-1-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)