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=-11.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 5830EC433E3 for ; Fri, 26 Mar 2021 05:55:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 592CA61A3F for ; Fri, 26 Mar 2021 05:55:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 592CA61A3F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9E99E6B0036; Fri, 26 Mar 2021 01:55:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 994A46B0073; Fri, 26 Mar 2021 01:55:30 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 80F5A6B0071; Fri, 26 Mar 2021 01:55:30 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0008.hostedemail.com [216.40.44.8]) by kanga.kvack.org (Postfix) with ESMTP id 642AE6B0036 for ; Fri, 26 Mar 2021 01:55:30 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 13CFA8249980 for ; Fri, 26 Mar 2021 05:55:30 +0000 (UTC) X-FDA: 77960963220.27.697A2DD Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf01.hostedemail.com (Postfix) with ESMTP id DE02C5001522 for ; Fri, 26 Mar 2021 05:55:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:In-Reply-To:References; bh=E58WkaT5a9CNBDa4o1M7zxGvPLG9b5U0RpS7GSOEYIs=; b=arksn03N9GceF7TZwzcFjWK42a rv/LcAMf0RAUO2Sb6OMiJPq7OEqgv1ifffRGNR4nJBf5Z3WhJWUJ9iyxAz08DAa9PMYmH9Kv8HNOl Ru6h5yg9e3gey9qb9I077A8BYeNWH95xHORqU76QfshaGZFndffgKK/fybjI7ttVci08Q6pn89rla SFkVO27xRJ31M+LOPi4JvvCnXZKKdmm4xWyy8cKl1r13A3SUzH3k+esyB4uSfL3nrXeY6Ejez0pqF JIwyDMRW7mAndZMzGkhPLeV/a8NW5HlyDjaa5svv7+M6iNISOd4amiait+iWEXam5QH0KyRM05Qta bvkOGKLg==; Received: from [2001:4bb8:191:f692:97ff:1e47:aee2:c7e5] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94 #2 (Red Hat Linux)) id 1lPfR5-005AHi-IK; Fri, 26 Mar 2021 05:55:07 +0000 From: Christoph Hellwig To: Andrew Morton , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi Cc: Chris Wilson , Daniel Vetter , Peter Zijlstra , intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org Subject: add remap_pfn_range_notrack instead of reinventing it in i915 v2 Date: Fri, 26 Mar 2021 06:55:01 +0100 Message-Id: <20210326055505.1424432-1-hch@lst.de> X-Mailer: git-send-email 2.30.1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DE02C5001522 X-Stat-Signature: wtw7zcj3mu58hab9ktkuirsq4tu3g97p Received-SPF: none (bombadil.srs.infradead.org>: No applicable sender policy available) receiver=imf01; identity=mailfrom; envelope-from=""; helo=bombadil.infradead.org; client-ip=198.137.202.133 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616738127-470101 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi all, i915 has some reason to want to avoid the track_pfn_remap overhead in remap_pfn_range. Add a function to the core VM to do just that rather than reinventing the functionality poorly in the driver. Note that the remap_io_sg path does get exercises when using Xorg on my Thinkpad X1, so this should be considered lightly tested, I've not managed to hit the remap_io_mapping path at all. Changes since v1: - create a io_mapping_map_user wrapper instead of exporting remap_pfn_range_notrack - switch to plain remap_pfn_range for remap_sg as it does not use a pre-verified pgprot from an iomap Diffstat: drivers/gpu/drm/i915/Kconfig | 1=20 drivers/gpu/drm/i915/gem/i915_gem_mman.c | 9 +- drivers/gpu/drm/i915/i915_drv.h | 3=20 drivers/gpu/drm/i915/i915_mm.c | 117 ++++++------------------= ------- include/linux/io-mapping.h | 3=20 include/linux/mm.h | 2=20 mm/Kconfig | 3=20 mm/Makefile | 1=20 mm/io-mapping.c | 29 +++++++ mm/memory.c | 51 ++++++++----- 10 files changed, 97 insertions(+), 122 deletions(-)