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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 A1D46C433E1 for ; Fri, 21 Aug 2020 12:19:55 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 6346420724 for ; Fri, 21 Aug 2020 12:19:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WUth1Znj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6346420724 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:57614 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k961S-00022J-Fo for qemu-devel@archiver.kernel.org; Fri, 21 Aug 2020 08:19:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57366) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k960j-0001Zp-MP for qemu-devel@nongnu.org; Fri, 21 Aug 2020 08:19:09 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:51074 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1k960g-0007o6-S2 for qemu-devel@nongnu.org; Fri, 21 Aug 2020 08:19:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1598012345; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=a8uoi7z5+VWASoHvRKRBrbTVEnh6LwLM+HyYys1fVds=; b=WUth1Znj7xKnZS9uJp5dh3MPCk6F16eqpFrtc35POU/GowkbN9r6aPd/VKFmWPKfRJgy2l Mzbp5n8o9g/8RJJvvj9BE+CD3HCUKrLtCtw6RLOoaxRPt+z4Y9OqwhgNZbH2YmY96rgAj+ bSOrP5UTJMJTff4QxcjLT6NjZRtnxtI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-111-gsIshrD_NmugzovYfD2zUA-1; Fri, 21 Aug 2020 08:18:59 -0400 X-MC-Unique: gsIshrD_NmugzovYfD2zUA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9D168640CB; Fri, 21 Aug 2020 12:18:58 +0000 (UTC) Received: from localhost (ovpn-114-118.ams2.redhat.com [10.36.114.118]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1EEDC756E0; Fri, 21 Aug 2020 12:18:54 +0000 (UTC) Date: Fri, 21 Aug 2020 13:18:53 +0100 From: Stefan Hajnoczi To: Eduardo Habkost , Igor Mammedov Subject: Re: [PATCH 0/3] nvdimm: read-only file support Message-ID: <20200821121853.GE205318@stefanha-x1.localdomain> References: <20200804101244.1283503-1-stefanha@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200804101244.1283503-1-stefanha@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="T6xhMxlHU34Bk0ad" Content-Disposition: inline Received-SPF: pass client-ip=207.211.31.81; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/21 05:15:56 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xiao Guangrong , "Michael S. Tsirkin" , Julio Montes , qemu-devel@nongnu.org, Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --T6xhMxlHU34Bk0ad Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Aug 04, 2020 at 11:12:41AM +0100, Stefan Hajnoczi wrote: > There is currently no way to back an NVDIMM with a read-only file so it c= an be > safely shared between untrusted guests. >=20 > Introduce an -object memory-backend-file,readonly=3Don|off option. >=20 > Julio Montes sent an earlier patch here: > https://patchew.org/QEMU/20190708211936.8037-1-julio.montes@intel.com/ >=20 > Eric Ernst requested this feature again for Kata Containers so I gave it = a try. >=20 > Stefan Hajnoczi (3): > memory: add readonly support to memory_region_init_ram_from_file() > hostmem-file: add readonly=3Don|off option > nvdimm: honor -object memory-backend-file,readonly=3Don option >=20 > docs/nvdimm.txt | 8 +++++++- > include/exec/memory.h | 2 ++ > include/exec/ram_addr.h | 5 +++-- > include/qemu/mmap-alloc.h | 2 ++ > backends/hostmem-file.c | 26 +++++++++++++++++++++++++- > exec.c | 18 +++++++++++------- > hw/mem/nvdimm.c | 4 ++++ > softmmu/memory.c | 7 +++++-- > util/mmap-alloc.c | 10 ++++++---- > util/oslib-posix.c | 2 +- > qemu-options.hx | 5 ++++- > 11 files changed, 70 insertions(+), 19 deletions(-) Ping --T6xhMxlHU34Bk0ad Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAl8/u60ACgkQnKSrs4Gr c8iMVAf/bdblugX3cZF0eD3lhYVJEf79yh9cetkC/w/zqMuM0G12sb3RJ9XYSTRo qHn10p7xZksLzI4lurbjUfsZxj2CqIbtp0sYZjribx7WpY4GObewMZ2QvpAg5WFg 7e8LiAgSckB9gA4TIw7H0R8TVs3xnWFbPnMAkvyXnJfeIE2sHX88Y0Du9lX9ysEo YzdynlrlSgqh7CE6G3pt/EESAVb5Cjcq2NGn7kgeU5NBAk8PaWCqu39PRBkLufnM DAfR4vqTaW0qW1KQv5LguJ27q3yhelDJ9eMJr0oyAMGL5uLY10tVMI/BTIhGDXxi BqtrgbfmsdyQfJJeYQC5ngulSHvRyA== =H9jo -----END PGP SIGNATURE----- --T6xhMxlHU34Bk0ad--