Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933096AbbFIUAU (ORCPT ); Tue, 9 Jun 2015 16:00:20 -0400 Received: from mail-la0-f65.google.com ([209.85.215.65]:36574 "EHLO mail-la0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753610AbbFIUAS (ORCPT ); Tue, 9 Jun 2015 16:00:18 -0400 Subject: [PATCHSET v3 0/4] pagemap: make useable for non-privilege users From: Konstantin Khlebnikov To: linux-mm@kvack.org, Andrew Morton , Naoya Horiguchi Cc: linux-api@vger.kernel.org, Mark Williamson , linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Date: Tue, 09 Jun 2015 23:00:13 +0300 Message-ID: <20150609195333.21971.58194.stgit@zurg> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1163 Lines: 31 This patchset makes pagemap useable again in the safe way. It adds bit 'map-exlusive' which is set if page is mapped only here and restores access for non-privileged users but hides pfn from them. Last patch removes page-shift bits and completes migration to the new pagemap format: flags soft-dirty and mmap-exlusive are available only in the new format. v3: check permissions in ->open --- Konstantin Khlebnikov (4): pagemap: check permissions and capabilities at open time pagemap: add mmap-exclusive bit for marking pages mapped only here pagemap: hide physical addresses from non-privileged users pagemap: switch to the new format and do some cleanup Documentation/vm/pagemap.txt | 3 - fs/proc/task_mmu.c | 219 +++++++++++++++++++----------------------- tools/vm/page-types.c | 35 +++---- 3 files changed, 118 insertions(+), 139 deletions(-) -- Signature -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/