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=-5.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 0BD43C433DB for ; Mon, 22 Feb 2021 07:47:14 +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 9D55264DDC for ; Mon, 22 Feb 2021 07:47:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D55264DDC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=srcf.ucam.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=6y/ieBnwMh7Rvlfi2ixYJcnaqRoMnRDKuxQUaP5Uf+s=; b=TNFO8tGrscYhXjMMlDKl3nHMN rGs/vbAf1lVpWXAU/a8L/9bnFmXUv1TEed4p7Bl/0HTONP0yRKEYj+OA7Gqk6TUhuO7T0AltRtIUQ Mdg4sAJv8JNvA2QYwcEP8EMdMxhnJrKIIAmzm3NNSE7wr3w7ibWQAhjCHm1NPCXT0bksTMgzR4BL1 EpfYH0NM/UE5L5LQ922Ab4cSO25TOHcKgTa+KJaJlKdq9eNx17G4JLI0z+tbuBmxlhiNqPYX6PHES GRlvw5bW6vSHdBXrf2mydhuuX/PthU2iOwAALju5+pnpx774oFpbeUFcsY6CCU/sNjmLiPUturP5b Ip8MwkTCg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lE5uW-0000Il-Lv; Mon, 22 Feb 2021 07:45:40 +0000 Received: from cavan.codon.org.uk ([2a00:1098:84:22e::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lE5uR-0000I5-BR; Mon, 22 Feb 2021 07:45:36 +0000 Received: by cavan.codon.org.uk (Postfix, from userid 1000) id 2065540A21; Mon, 22 Feb 2021 07:34:52 +0000 (UTC) Date: Mon, 22 Feb 2021 07:34:52 +0000 From: Matthew Garrett To: Mike Rapoport Subject: Re: [PATCH v17 08/10] PM: hibernate: disable when there are active secretmem users Message-ID: <20210222073452.GA30403@codon.org.uk> References: <20210208084920.2884-1-rppt@kernel.org> <20210208084920.2884-9-rppt@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210208084920.2884-9-rppt@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210222_024535_525364_4AA9C780 X-CRM114-Status: GOOD ( 11.45 ) 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 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? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel