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,USER_AGENT_GIT autolearn=ham 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 22000C433E0 for ; Thu, 25 Jun 2020 07:46:00 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EDB5C20789 for ; Thu, 25 Jun 2020 07:45:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EDB5C20789 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=hisilicon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id B376286239; Thu, 25 Jun 2020 07:45:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RqjDLilRis18; Thu, 25 Jun 2020 07:45:59 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 0B25D86155; Thu, 25 Jun 2020 07:45:59 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id EBDA9C0863; Thu, 25 Jun 2020 07:45:58 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 33E8EC016F for ; Thu, 25 Jun 2020 07:45:58 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 1A70987631 for ; Thu, 25 Jun 2020 07:45:58 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FGBONvi3PMIm for ; Thu, 25 Jun 2020 07:45:57 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from huawei.com (szxga05-in.huawei.com [45.249.212.191]) by whitealder.osuosl.org (Postfix) with ESMTPS id 4D25184AAD for ; Thu, 25 Jun 2020 07:45:57 +0000 (UTC) Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id CC418F2672C0FCA43C08; Thu, 25 Jun 2020 15:45:33 +0800 (CST) Received: from SWX921481.china.huawei.com (10.126.203.118) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Thu, 25 Jun 2020 15:45:23 +0800 From: Barry Song To: , , , , , Subject: [PATCH v2 2/2] arm64: mm: reserve per-numa CMA after numa_init Date: Thu, 25 Jun 2020 19:43:30 +1200 Message-ID: <20200625074330.13668-3-song.bao.hua@hisilicon.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20200625074330.13668-1-song.bao.hua@hisilicon.com> References: <20200625074330.13668-1-song.bao.hua@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.126.203.118] X-CFilter-Loop: Reflected Cc: Steve Capper , linuxarm@huawei.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, Andrew Morton , Mike Rapoport , Nicolas Saenz Julienne X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Right now, smmu is using dma_alloc_coherent() to get memory to save queues and tables. Typically, on ARM64 server, there is a default CMA located at node0, which could be far away from node2, node3 etc. with this patch, smmu will get memory from local numa node to save command queues and page tables. that means dma_unmap latency will be shrunk much. Meanwhile, when iommu.passthrough is on, device drivers which call dma_ alloc_coherent() will also get local memory and avoid the travel between numa nodes. Cc: Christoph Hellwig Cc: Marek Szyprowski Cc: Will Deacon Cc: Robin Murphy Cc: Ganapatrao Kulkarni Cc: Catalin Marinas Cc: Nicolas Saenz Julienne Cc: Steve Capper Cc: Andrew Morton Cc: Mike Rapoport Signed-off-by: Barry Song --- arch/arm64/mm/init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 1e93cfc7c47a..07d4d1fe7983 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -420,6 +420,8 @@ void __init bootmem_init(void) arm64_numa_init(); + dma_pernuma_cma_reserve(); + /* * must be done after arm64_numa_init() which calls numa_init() to * initialize node_online_map that gets used in hugetlb_cma_reserve() -- 2.27.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu