From patchwork Fri Aug 2 02:19:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: john.hubbard@gmail.com X-Patchwork-Id: 11085961 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AAB901395 for ; Fri, 9 Aug 2019 09:19:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 99DB428BBC for ; Fri, 9 Aug 2019 09:19:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8CE7C28C3E; Fri, 9 Aug 2019 09:19:29 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4F83128BBC for ; Fri, 9 Aug 2019 09:19:29 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5CD1F6EDD1; Fri, 9 Aug 2019 09:19:22 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5375E6E862; Fri, 2 Aug 2019 02:20:39 +0000 (UTC) Received: by mail-pg1-x544.google.com with SMTP id t132so35228191pgb.9; Thu, 01 Aug 2019 19:20:39 -0700 (PDT) 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=0y5rJgolnpdx1vwnOpLTxW7O4fuw+3wJL+gU2Q7/qgc=; b=BoAKIYE0RmYNg1Tgaw02IaqDGlp6Z1mbLkHYzWUJWNKpXjblijVzikolPW/GyLDB1d IdAPVQv4sww8C2wknPFQgu2Td7v0ULL38k3nflq3XLBAD1IAKuzv0VrYequMDQ2akGmc Ype/Zgmb0nrW2lUEfAq9UFp3FE43FXr2C++ylQ1yltrBZ6iAmiNVFzUmgqELNttZFEBk +zAQCHXkjyUYUqfusboqMqjmSpQ9WNc4jOf5aHF/ynyCiwygtgiLflkBjQNNuzvQQQmz mXSOk9/1B2hW/aEY1IJbgkpcJ9lBsJFxl39H9Hj8ryA2fCiOFgA7DZ26hr2l9yk648ll rAPA== X-Gm-Message-State: APjAAAX5020W7zlxwV8qXalmK7zs4zEs41msr8RghMEoqJNxszl3+bkr wheqfgJLhtk85/RCQRzhl+E= X-Google-Smtp-Source: APXvYqwl6c8l8akPJ/a0xk+3KepmeSM3zSOQCzHQzAg87pSWv9yrqkhky05R7WwjG4AiAw2gALdPbw== X-Received: by 2002:a17:90a:b908:: with SMTP id p8mr1903028pjr.94.1564712438974; Thu, 01 Aug 2019 19:20:38 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id u9sm38179744pgc.5.2019.08.01.19.20.37 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 19:20:38 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Date: Thu, 1 Aug 2019 19:19:48 -0700 Message-Id: <20190802022005.5117-18-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190802022005.5117-1-jhubbard@nvidia.com> References: <20190802022005.5117-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Mailman-Approved-At: Fri, 09 Aug 2019 09:15:44 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0y5rJgolnpdx1vwnOpLTxW7O4fuw+3wJL+gU2Q7/qgc=; b=XcvG9OtyU86jk5JnQKO48GBJW89xfPHHxg+Ne0d0GJwSK2IuihtMCJFR8pabDqBzEF DuPSfNePU528rZ6hBUi+QFYoZILMY8tdggEmTr3mN7PzDRJ7a6OmrfV2tsrS8kf2+6HI Zo6kU0MY4gjn6C4vTTeXk9IHVKARwawE7INoHfJ5sfq56uo1gVj3e8g1oiz6b7OI/wgS KnIyWK9Z49VV7ULXr41yNDN0bWyja3EYTBz6mLtPsaZCe7aB+yHXvCTEBAOwbU3wp1bf uiomAHYjSX4K0Tach88phQCyk3zfRucll/enDp2U+3MmHAZ/atNajIitsMHfeEHfycq9 ft2g== Subject: [Intel-gfx] [PATCH 17/34] vfio: convert put_page() to put_user_page*() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Jan Kara , kvm@vger.kernel.org, Dave Hansen , Dave Chinner , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Ira Weiny , ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Jason Gunthorpe , xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, John Hubbard , intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , linux-rpi-kernel@lists.infradead.org, Dan Williams , linux-arm-kernel@lists.infradead.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, LKML , linux-xfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fsdevel@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: John Hubbard For pages that were retained via get_user_pages*(), release those pages via the new put_user_page*() routines, instead of via put_page() or release_pages(). This is part a tree-wide conversion, as described in commit fc1d8e7cca2d ("mm: introduce put_user_page*(), placeholder versions"). Note that this effectively changes the code's behavior in qp_release_pages(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christophe Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Cc: Alex Williamson Cc: kvm@vger.kernel.org Signed-off-by: John Hubbard --- drivers/vfio/vfio_iommu_type1.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 054391f30fa8..5a5461a14299 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -320,9 +320,9 @@ static int put_pfn(unsigned long pfn, int prot) { if (!is_invalid_reserved_pfn(pfn)) { struct page *page = pfn_to_page(pfn); - if (prot & IOMMU_WRITE) - SetPageDirty(page); - put_page(page); + bool dirty = prot & IOMMU_WRITE; + + put_user_pages_dirty_lock(&page, 1, dirty); return 1; } return 0; @@ -356,7 +356,7 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned long vaddr, */ if (ret > 0 && vma_is_fsdax(vmas[0])) { ret = -EOPNOTSUPP; - put_page(page[0]); + put_user_page(page[0]); } } up_read(&mm->mmap_sem);