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: 11072219 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 960B813AC for ; Fri, 2 Aug 2019 02:24:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89F2328620 for ; Fri, 2 Aug 2019 02:24:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E141287C6; Fri, 2 Aug 2019 02:24:58 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DB6128620 for ; Fri, 2 Aug 2019 02:24:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731763AbfHBCYs (ORCPT ); Thu, 1 Aug 2019 22:24:48 -0400 Received: from mail-pg1-f196.google.com ([209.85.215.196]:39900 "EHLO mail-pg1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390865AbfHBCUk (ORCPT ); Thu, 1 Aug 2019 22:20:40 -0400 Received: by mail-pg1-f196.google.com with SMTP id u17so35241237pgi.6; Thu, 01 Aug 2019 19:20:39 -0700 (PDT) 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== 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=oF40EQAHQazFru3n+0SQS2GqdTuxmyS5asVTXRj9LrwSiHxPXjMBO09jZt1bKA/f/S PSuYBKN5RVVltawn9iQ9DQ2mLWS+Ny51vTMHUy3X+JxJ8mopA8QqX9zH78DImQ+/ztax Fp86cOPwks8TwDdZZzr1h/9R4iJtU7KGo4HMtTUeOL0/QgDAYiMmmgaBdhWtIOqv2OXK 1TntABk2SpuFJC6PhGjqV2spzia/DUGTblLQBmCbGiuy1cjSl2ug+llYxfFGp06bYd9k KsB857o6Yn/8RicaKzX+Gr1un4cZpb5QmbpI5wl9ZWZopC1gVp/npcmlPxJJJm0KBQ/Y H+bw== X-Gm-Message-State: APjAAAVo3nGdreQ/UWzgQnV/9/5SCRGv068e57l2kwDsPdkCLD1pptaV PUD7ttqQoz46l9gjsWReSI0= 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 Cc: Christoph Hellwig , Dan Williams , Dave Chinner , Dave Hansen , Ira Weiny , Jan Kara , Jason Gunthorpe , =?utf-8?b?SsOpcsO0?= =?utf-8?b?bWUgR2xpc3Nl?= , LKML , amd-gfx@lists.freedesktop.org, ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, devel@lists.orangefs.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-media@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-xfs@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, sparclinux@vger.kernel.org, x86@kernel.org, xen-devel@lists.xenproject.org, John Hubbard , Alex Williamson Subject: [PATCH 17/34] vfio: convert put_page() to put_user_page*() 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 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 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);