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=-4.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 7A351C433E0 for ; Mon, 22 Feb 2021 10:25:40 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2B1E164DAF for ; Mon, 22 Feb 2021 10:25:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B1E164DAF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=egOxkH91clsJoNASckgUl0NV+vS9doT4Xig3Pd+L29I=; b=hpmdTjO471SzII6r4wUaKGnhO tqWDhiDteWJrblg56iZZPTEolnLDnfoAk2wsvtdFG2akP5VAGeFEFlugeGoXum6TxY6BkeamgKErR xIRCdkFdoAEK0oMhrYycWX4SzU8Mn9puooqgHxgNkTDMDIfqQ2fEFtExIemar6xNGCxXBUSz1jqK0 3ZbuBVJH8b4/QjMwAP0f+s/qipyE20uqYsigkHiChZen7UzrC4VW3n9ygUL7SohTezHp5DFtE0gKA i9bAsuU0gcBTw884mbf0t0YQrcSRkRkcgIsr9JgDBcmXBMGk7O1FDtUickXgu2pA4Da+Y2E7nYuaS AiRuHrtpw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lE8O5-0007DW-FY; Mon, 22 Feb 2021 10:24:21 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lE8O3-0007CL-2m; Mon, 22 Feb 2021 10:24:19 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 09BB564E2F; Mon, 22 Feb 2021 10:24:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1613989457; bh=hPfUfFtTmjkrQbsktsKt6yfqMzt3/NRJ4jjF/NEBc8g=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=b3V9NfUxwhwIYN04tZ4xVJ3p5sqw8LDNui76vseSDtV/Re6690BnkfF+nR9DcxpOG pUgE90vqEFMU/X/MPAhMaZnhkphLp2hZD3Ly/S74TC7UD+nyJ2MxvQgUFzQn0n4cWr O38zmX3c++0vqSgjip+sme4YMMtTL5UAgX7/Dvrcr8EOMRxrQU75JWaHMRk39qP/AW lgAw/KQkfggAeoHx3YM+5n3m6vnlhaY/3Jp3VStjpjmNap+nGK6+o3g9qwoOyHxtFy vWZY83MCClCfU5xmCjWJ66fOJT92kzAT9sZgszmOAF/eGW/eyThqm6caGmwW8QA7LL 32a3PdFZcp9HQ== Date: Mon, 22 Feb 2021 12:23:59 +0200 From: Mike Rapoport To: Matthew Garrett Subject: Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users Message-ID: <20210222102359.GE1447004@kernel.org> References: <20210208084920.2884-1-rppt@kernel.org> <20210208084920.2884-9-rppt@kernel.org> <20210222073452.GA30403@codon.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210222073452.GA30403@codon.org.uk> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210222_052419_227795_9B79E277 X-CRM114-Status: GOOD ( 14.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Michal Hocko , David Hildenbrand , Peter Zijlstra , Catalin Marinas , Dave Hansen , linux-mm@kvack.org, linux-kselftest@vger.kernel.org, "H. Peter Anvin" , Christopher Lameter , Shuah Khan , Thomas Gleixner , Elena Reshetova , linux-arch@vger.kernel.org, Tycho Andersen , linux-nvdimm@lists.01.org, Will Deacon , x86@kernel.org, Matthew Wilcox , Mike Rapoport , Ingo Molnar , Michael Kerrisk , Palmer Dabbelt , Arnd Bergmann , James Bottomley , Hagen Paul Pfeifer , Borislav Petkov , Alexander Viro , Andy Lutomirski , Paul Walmsley , "Kirill A. Shutemov" , Dan Williams , linux-arm-kernel@lists.infradead.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Palmer Dabbelt , linux-fsdevel@vger.kernel.org, Shakeel Butt , Andrew Morton , Rick Edgecombe , Roman Gushchin Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 22, 2021 at 07:34:52AM +0000, Matthew Garrett wrote: > On Mon, Feb 08, 2021 at 10:49:18AM +0200, Mike Rapoport wrote: > > > It is unsafe to allow saving of secretmem areas to the hibernation > > snapshot as they would be visible after the resume and this essentially > > will defeat the purpose of secret memory mappings. > > Sorry for being a bit late to this - from the point of view of running > processes (and even the kernel once resume is complete), hibernation is > effectively equivalent to suspend to RAM. Why do they need to be handled > differently here? Hibernation leaves a copy of the data on the disk which we want to prevent. -- Sincerely yours, Mike. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel