From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F345246EF78 for ; Thu, 27 Aug 2026 13:07:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787836043; cv=none; b=MLZDBoIqbhEFARirrz8QY7GjvU3+G0gZE5RG2Z6WUmZ/pZK3zV3nK5785vCbYs8QIozf7naGQzZWzzH0xLGQ/7hCFWLoePL/qX7AXwSKQ4Mw7dfsn2NqkfR5Knfar4ALZBKTh6NruXoNBH/ugktbYDsKKnEgQlVtCj0akfEoJUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787836043; c=relaxed/simple; bh=nwDTZJHZOcBwl9ilmZZ3o0oMQpMitgYWB4DCLi/dwlQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KgB78KeRHFKgYea7lemudQ2TGCkjMu2RzGhRKHGrqC6aYN0dGfkwxK1xJHsGNlinHtmI9fIHuQnLHILZsu4fPZnwBYnPsHdpqeWMW9jl1UJem4toN1ord/ODoSf+oPw0K+D+OSYiDisuKfS2CAtzd5SBsgr7DLaSniWH3J8kRo8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=EM+TWHxb; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="EM+TWHxb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1787836021; h=from:from:reply-to: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=Mh3D0c8HMi9HiFStvEOvYPHkOE70zz9VonxkPPBkf8U=; b=EM+TWHxbAVLCEC7AdWv1Sl0hKX3c0GfT3y1M8YqbG3JDJqynTwLm+cgmM9lb+K0sjw2tfq WU/s/k7BhjVJuZLznRH/hQmlZQM6zMd10ibOSUp84OHimcPvS+rvHTqIYSId6OGjp15SuR Odae6tjP7Y+fHwRARRlLeWOpB/cHn1o= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-711-S5OhsjGJMCCQALStn4DJcw-1; Thu, 27 Aug 2026 09:06:58 -0400 X-MC-Unique: S5OhsjGJMCCQALStn4DJcw-1 X-Mimecast-MFC-AGG-ID: S5OhsjGJMCCQALStn4DJcw_1787836016 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 44C17195605B; Thu, 27 Aug 2026 13:06:56 +0000 (UTC) Received: from redhat.com (headnet05.pony-001.prod.iad2.dc.redhat.com [10.2.32.117]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 610E81955F70; Thu, 27 Aug 2026 13:06:52 +0000 (UTC) Date: Thu, 27 Aug 2026 14:06:49 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Mathieu Poirier Cc: kchamart@redhat.com, pierrick.bouvier@oss.qualcomm.com, peter.maydell@linaro.org, mst@redhat.com, cohuck@redhat.com, pbonzini@redhat.com, eblake@redhat.com, armbru@redhat.com, lorenzo.pieralisi@linaro.org, gshan@redhat.com, enju.kohei@fujitsu.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, kvm@vger.kernel.org Subject: Re: [RFC v3 00/24] Add Realm support to QEMU-VMM Message-ID: Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= References: <20260825220101.3443954-1-mathieu.poirier@linaro.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260825220101.3443954-1-mathieu.poirier@linaro.org> User-Agent: Mutt/2.4.0 (2026-06-19) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 On Tue, Aug 25, 2026 at 04:00:37PM -0600, Mathieu Poirier wrote: > This patchset provides minimal functionality to start a Realm VM > from an Arm RME capable host using the following command line: > > qemu-system-aarch64 \ > -M confidential-guest-support=rme0,memory-backend=ram0 \ > -object rme-guest,id=rme0,convert-in-place=on \ > -object memory-backend-guest-memfd,id=ram0,size=1G,share=on \ > -cpu host -M virt -enable-kvm -M gic-version=3,its=on -nodefaults .. This example mentions 'convert-in-place=on', but I don't see that property implemented in this series. Is the example a mistake or is this from a further follow-on series yet to come ? Also as a more general conceptual question, in there going to be any equiv to SNP's "hostdata" or TDX's "mr-config-id", that will let the guest owner pass in some bytes of data that get included in the measurement ? Trustee has mention of "CCA_REALM_PERSONALIZATION_VALUE" for Arm. Would that become a property of 'rme-guest' in future work ? With regards, Daniel [1] https://github.com/confidential-containers/trustee/blob/main/kbs/docs/initdata.md -- |: https://berrange.com ~~ https://hachyderm.io/@berrange :| |: https://libvirt.org ~~ https://entangle-photo.org :| |: https://pixelfed.art/berrange ~~ https://fstop138.berrange.com :|