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=-3.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 84399C433FF for ; Mon, 5 Aug 2019 09:12:07 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 5A6AC2067D for ; Mon, 5 Aug 2019 09:12:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="YQCIQZU1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5A6AC2067D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 4319FD93; Mon, 5 Aug 2019 09:12:07 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 87BF1D8D for ; Mon, 5 Aug 2019 09:12:05 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 3C018829 for ; Mon, 5 Aug 2019 09:12:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=wo3Nidt8ANHCfxiPlT6m8OyX2VllNhDuCO+MMrpvH/I=; b=YQCIQZU18z4XZ7xnEFtZ3cpMK Uh746e5z0+Ze8+no/kJTHFcXr5n7M0AigP68dRR1vaD8C1IiKx8GBDdf+pTzNpolrmVo1vXwL8O4U pofCvygM9ItpBTVbSIdiKx4Ft7TZqBmRFyRENOXy+ZZg6BYCdfwmlWAsyWiXXHCRkq/ZLfU24iiAl fQLrtCnL1CSEVtWnVBNfyY4ZjE+J6QuKWe2eNjfqO42FtjBo8AHpHvePL2TgIB5XCrqGiq1pT9rm2 DwKvITQk1WE+AxkNw2InQLevcg8OBP9uZdEp/+LIuplG6j7mSGycvzt89x7fskUuyhyD2Jv80Uxoi tcepYDwPg==; Received: from [195.167.85.94] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1huZ28-0004qn-Vz; Mon, 05 Aug 2019 09:12:01 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org, Marek Szyprowski Subject: remove default fallbacks in dma_map_ops v2 Date: Mon, 5 Aug 2019 12:11:52 +0300 Message-Id: <20190805091159.7826-1-hch@lst.de> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: linux-xtensa@linux-xtensa.org, Michal Simek , linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, Takashi Iwai , linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hi all, we have a few places where the DMA mapping layer has non-trivial default actions that are questionable and/or dangerous. This series instead wires up the mmap, get_sgtable and get_required_mask methods explicitly and cleans up some surrounding areas. This also means we could get rid of the ARCH_NO_COHERENT_DMA_MMAP kconfig option, as we now require a mmap method wired up, or in case of non-coherent dma-direct the presence of the arch_dma_coherent_to_pfn hook. The only interesting case is that the sound code also checked the ARCH_NO_COHERENT_DMA_MMAP symbol in somewhat odd ways, so I'd like to see a review of the sound situation before going forward with that patch. Changes since v1: - add a dma_can_mmap helper for alsa _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu