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=-9.8 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=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 947A9C433E0 for ; Wed, 3 Jun 2020 02:44:51 +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 7335620757 for ; Wed, 3 Jun 2020 02:44:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7335620757 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 4E4F186371; Wed, 3 Jun 2020 02:44:51 +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 Sa6V1F5i5P5S; Wed, 3 Jun 2020 02:44:50 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id C751E86366; Wed, 3 Jun 2020 02:44:50 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id C16C9C0865; Wed, 3 Jun 2020 02:44:50 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 9389BC016E for ; Wed, 3 Jun 2020 02:44:49 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 8E93A87829 for ; Wed, 3 Jun 2020 02:44:49 +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 KXsNJaDFHQrH for ; Wed, 3 Jun 2020 02:44:48 +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 D4065815FD for ; Wed, 3 Jun 2020 02:44:47 +0000 (UTC) Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id DC136CB971D0477D9F6E; Wed, 3 Jun 2020 10:44:43 +0800 (CST) Received: from SWX921481.china.huawei.com (10.126.201.193) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.487.0; Wed, 3 Jun 2020 10:44:34 +0800 From: Barry Song To: , , , Subject: [PATCH 3/3] arm64: mm: reserve per-numa CMA after numa_init Date: Wed, 3 Jun 2020 14:42:31 +1200 Message-ID: <20200603024231.61748-4-song.bao.hua@hisilicon.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20200603024231.61748-1-song.bao.hua@hisilicon.com> References: <20200603024231.61748-1-song.bao.hua@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.126.201.193] X-CFilter-Loop: Reflected Cc: linux-kernel@vger.kernel.org, linuxarm@huawei.com, iommu@lists.linux-foundation.org, prime.zeng@hisilicon.com, Will Deacon , linux-arm-kernel@lists.infradead.org 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: Will Deacon Cc: Robin Murphy 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 8f0e70ebb49d..204a534982b2 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -474,6 +474,8 @@ void __init bootmem_init(void) arm64_numa_init(); + dma_pernuma_cma_reserve(); + #ifdef CONFIG_ARM64_4K_PAGES hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT); #endif -- 2.23.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu