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=-11.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 BF77DC43462 for ; Wed, 19 May 2021 03:50:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5B9C66135C for ; Wed, 19 May 2021 03:50:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B9C66135C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id DE0128E006D; Tue, 18 May 2021 23:50:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D904F8E002F; Tue, 18 May 2021 23:50:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C09E08E006D; Tue, 18 May 2021 23:50:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0097.hostedemail.com [216.40.44.97]) by kanga.kvack.org (Postfix) with ESMTP id 924088E002F for ; Tue, 18 May 2021 23:50:56 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 3C533180AD82F for ; Wed, 19 May 2021 03:50:56 +0000 (UTC) X-FDA: 78156604512.19.4E93590 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf05.hostedemail.com (Postfix) with ESMTP id 48C8BE000105 for ; Wed, 19 May 2021 03:50:55 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 6A22160698; Wed, 19 May 2021 03:50:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621396255; bh=OHqMi61ZqX4ySIrfnisk/+K7U7qM/mCXhP8jYMj1P84=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=YYAE07pQhQM8o7Wp7sXA/L3u7rt0s5M+ViFahOF7b94Od8vLSvNm59LWBWGahD5Td //07qQooCrEAvIEElW9/DslmDL8J4D2K38vvD2y4ZIFnrbiE6mYEZP+qyMTJRbPQm4 ng7WKl+CsCMDiF9ZTD5yz79TwuhQ2Bmem6NORzx5sZia3oO9BeRuVTw7r2+9JG4Bn1 Y5+OK1WrxaIkzC5MuMQxoLI7XHdiQBfR4r9qxVwgO96jZTvNivIbQyXbGEcZ1Bo5sU 2a/tc6+FwBn7EtnfaddaIUUJMDcK0N4p6TdNf2HQST//b3D2Bl+XNTSL1haulJxm4I yH1MAff7bIYkg== Date: Wed, 19 May 2021 06:50:37 +0300 From: Mike Rapoport To: Andrew Morton Cc: Alexander Viro , Andy Lutomirski , Arnd Bergmann , Borislav Petkov , Catalin Marinas , Christopher Lameter , Dan Williams , Dave Hansen , David Hildenbrand , Elena Reshetova , "H. Peter Anvin" , Hagen Paul Pfeifer , Ingo Molnar , James Bottomley , James Bottomley , Kees Cook , "Kirill A. Shutemov" , Matthew Wilcox , Matthew Garrett , Mark Rutland , Michal Hocko , Mike Rapoport , Michael Kerrisk , Palmer Dabbelt , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , "Rafael J. Wysocki" , Rick Edgecombe , Roman Gushchin , Shakeel Butt , Shuah Khan , Thomas Gleixner , Tycho Andersen , Will Deacon , Yury Norov , linux-api@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-nvdimm@lists.01.org, linux-riscv@lists.infradead.org, x86@kernel.org Subject: Re: [PATCH v20 4/7] mm: introduce memfd_secret system call to create "secret" memory areas Message-ID: References: <20210518072034.31572-1-rppt@kernel.org> <20210518072034.31572-5-rppt@kernel.org> <20210518174422.399ad118a051fe4c5b11d7ba@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210518174422.399ad118a051fe4c5b11d7ba@linux-foundation.org> Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=YYAE07pQ; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf05.hostedemail.com: domain of rppt@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=rppt@kernel.org X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 48C8BE000105 X-Stat-Signature: f1g9obetjjri7ucmaqfanfe14g4jsjmp X-HE-Tag: 1621396255-68861 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: On Tue, May 18, 2021 at 05:44:22PM -0700, Andrew Morton wrote: > On Tue, 18 May 2021 10:20:31 +0300 Mike Rapoport wrote: > > > From: Mike Rapoport > > > > Introduce "memfd_secret" system call with the ability to create memory > > areas visible only in the context of the owning process and not mapped not > > only to other processes but in the kernel page tables as well. > > > > ... > > > > --- a/mm/Kconfig > > +++ b/mm/Kconfig > > @@ -901,4 +901,9 @@ config KMAP_LOCAL > > # struct io_mapping based helper. Selected by drivers that need them > > config IO_MAPPING > > bool > > + > > +config SECRETMEM > > + def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED > > + select STRICT_DEVMEM > > + > > endmenu > > WARNING: unmet direct dependencies detected for STRICT_DEVMEM > Depends on [n]: MMU [=y] && DEVMEM [=n] && (ARCH_HAS_DEVMEM_IS_ALLOWED [=y] || GENERIC_LIB_DEVMEM_IS_ALLOWED [=n]) > Selected by [y]: > - SECRETMEM [=y] > > so I went back to the v19 version, with Ouch, sorry, I forgot to remove that hunk, v19 is the correct version. > --- a/mm/Kconfig~mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas-fix > +++ a/mm/Kconfig > @@ -907,6 +907,5 @@ config IO_MAPPING > > config SECRETMEM > def_bool ARCH_HAS_SET_DIRECT_MAP && !EMBEDDED > - select STRICT_DEVMEM > > endmenu > _ > -- Sincerely yours, Mike.