From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 68CB0471CFA for ; Tue, 1 Sep 2026 13:20:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788268825; cv=none; b=N/BCB8UkVzPWBGPuvdu7Sh7s88nccvVd5cwNNv8y/4hcLH6GcP9NmbbQeG+XW9XrLElNGngCzA99cUnYBan0QMjKOWarsOLY/sm9l2PFMcLR3REu9QqbXFxAcbK/B0lu39LP8DhpezQuMFaPoqOJ8/UzK1oGUhOnukp0D361LSM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788268825; c=relaxed/simple; bh=PX3C104VdGlAaeDXmNxMdkdmwic9JMJf3Tx127kYd2A=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=DMUDGWA3T51XaaI/W6xF3zkoHfWQZ+MNbZHRSzJVIf9COwAqEsNIGdh/054yfCxsYUPvCCu71Ipsp1l3f1ToS48+O29FFJgEx7MhFtosQmxzh6sWA3Em+m1kQw8btKIbZ/mbuI7qIJMyRP923PvTKCM2vFJksOOAlv143CiH1Hg= 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=b/VfdNHQ; arc=none smtp.client-ip=170.10.133.124 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="b/VfdNHQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1788268822; 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=26+D5MXwwk02WY5U6zB7de1//ugPlUVFcs7ZCwHdu5U=; b=b/VfdNHQuLGp9cXuY0Rrl0jGrFXR/608y75AhfDSVLTTKQ+SrVF5cHBRWQlgMd36CO+TRV I6gmmXbIR3hrF4eop07GyMOK1oIKilLHBOg89p3D0ECwalKdPNBCRQP4z34DBlpk2ajqjC qidyoO7lylcVWcdfv07btg6Vdg/KcvA= Received: from mx-prod-mc-05.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-404-MqMluuANOPWxR5y1MXAcqQ-1; Tue, 01 Sept 2026 09:20:19 -0400 X-MC-Unique: MqMluuANOPWxR5y1MXAcqQ-1 X-Mimecast-MFC-AGG-ID: MqMluuANOPWxR5y1MXAcqQ_1788268817 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 26AB61921EEE; Tue, 1 Sep 2026 13:20:17 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.44.22.5]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 528EE1955F2D; Tue, 1 Sep 2026 13:20:16 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id A55C321E682B; Tue, 01 Sep 2026 15:20:13 +0200 (CEST) From: Markus Armbruster To: Mathieu Poirier Cc: berrange@redhat.com, kchamart@redhat.com, pierrick.bouvier@oss.qualcomm.com, peter.maydell@linaro.org, mst@redhat.com, cohuck@redhat.com, pbonzini@redhat.com, eblake@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 In-Reply-To: <20260825220101.3443954-1-mathieu.poirier@linaro.org> (Mathieu Poirier's message of "Tue, 25 Aug 2026 16:00:37 -0600") References: <20260825220101.3443954-1-mathieu.poirier@linaro.org> Date: Tue, 01 Sep 2026 15:20:13 +0200 Message-ID: <87wlt55cs2.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Mathieu Poirier writes: > 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 .. > > It is a refactoring of Jean-Philippe Brucker's initial work dating from a while > back. It is compatible with Steven Price's v16 revision [1] of his work adding > CCA support to KVM. > > This revision is based on Michael Roth's work on guest memfd in-place memory > conversion [2] and as such, the QEMU baseline is different from 'master'. Other Use Based-on: <20260528000416.8161-1-michael.roth@amd.com> to document your base. This stands out to humans, and is readable by machines. Next time :) > than modifications to use in-place memory conversion from Lorenzo Pieralisi that > were integrated to patches 04, 08-11, it is identical to V2. > > It was tested on the QEMU SBSA machine. For convenience, a repository is hosted > here [3], Michael's series doesn't apply on master anymore, so I fetched this branch. It's based on master as of *May*. This won't do. Please rebase. > along with the TF-A [4] and RMM [5] for the SBSA machine (compatible > with Steven's v16 patchset). The Repository for the kernel [6] is available > from Arm. > > Instructions to compile and run the entire stack can be found here [7]. > > Device Assignment is not included. > > Thanks, > Mathieu > > [1]. https://lore.kernel.org/kvm/20260803134403.80630-1-steven.price@arm.com/ > [2]. https://lore.kernel.org/kvm/20260528000416.8161-1-michael.roth@amd.com/ > [3]. https://gitlab.com/Linaro/cca-public/qemu/-/tree/upstream-v3?ref_type=heads > [4]. https://gitlab.com/Linaro/cca-public/tf-a/trusted-firmware-a/-/tree/cca/v13?ref_type=heads > [5]. https://gitlab.com/Linaro/cca-public/rmm/-/tree/cca/v16?ref_type=heads > [6]. https://gitlab.arm.com/linux-arm/linux-cca/-/tree/cca-host/v16?ref_type=heads > [7]. https://gitlab.com/Linaro/cca-public/build-instructions > > RFC v2: https://lore.kernel.org/kvm/20260728192630.240375-1-mathieu.poirier@linaro.org/ > RFC v1: https://lists.gnu.org/archive/html/qemu-devel/2026-07/msg02307.html