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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id AF323C54E58 for ; Wed, 20 Mar 2024 11:48:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rmuQK-00036n-Iq; Wed, 20 Mar 2024 07:48:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rmuQI-00036I-Ta for qemu-devel@nongnu.org; Wed, 20 Mar 2024 07:47:58 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rmuQH-0000os-4Z for qemu-devel@nongnu.org; Wed, 20 Mar 2024 07:47:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1710935275; 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=ACO5J+apt9WhWRslXtiw90ds41xUnNimB5Qm6zHOcsY=; b=f5EEAcYZjXHAf4Ztx+mHunph1Pv9RDOEl5Gx8rHtEY2xAQbYi7sXi/XtNz9US1oNqOg+8H psiNbLRCPxOVVFLayrJU1qQs/VWguOr9Y8G8UdveaTadodEw5JV8A5lVKTcoMKBWOoF6V/ pydkNGk1CpeSY/DODbpE0aIXPu+njMw= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-88-XebOVlXENP-3nSagFdA4EQ-1; Wed, 20 Mar 2024 07:47:52 -0400 X-MC-Unique: XebOVlXENP-3nSagFdA4EQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (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 mimecast-mx02.redhat.com (Postfix) with ESMTPS id 140412800C2C; Wed, 20 Mar 2024 11:47:52 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.205]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D206B40C6CB3; Wed, 20 Mar 2024 11:47:50 +0000 (UTC) Date: Wed, 20 Mar 2024 11:47:28 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Michael Roth Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Tom Lendacky , Paolo Bonzini , Markus Armbruster , Pankaj Gupta , Xiaoyao Li , Isaku Yamahata Subject: Re: [PATCH v3 21/49] i386/sev: Introduce "sev-common" type to encapsulate common SEV state Message-ID: References: <20240320083945.991426-1-michael.roth@amd.com> <20240320083945.991426-22-michael.roth@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20240320083945.991426-22-michael.roth@amd.com> User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.417, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Wed, Mar 20, 2024 at 03:39:17AM -0500, Michael Roth wrote: > Currently all SEV/SEV-ES functionality is managed through a single > 'sev-guest' QOM type. With upcoming support for SEV-SNP, taking this > same approach won't work well since some of the properties/state > managed by 'sev-guest' is not applicable to SEV-SNP, which will instead > rely on a new QOM type with its own set of properties/state. > > To prepare for this, this patch moves common state into an abstract > 'sev-common' parent type to encapsulate properties/state that are > common to both SEV/SEV-ES and SEV-SNP, leaving only SEV/SEV-ES-specific > properties/state in the current 'sev-guest' type. This should not > affect current behavior or command-line options. > > As part of this patch, some related changes are also made: > > - a static 'sev_guest' variable is currently used to keep track of > the 'sev-guest' instance. SEV-SNP would similarly introduce an > 'sev_snp_guest' static variable. But these instances are now > available via qdev_get_machine()->cgs, so switch to using that > instead and drop the static variable. > > - 'sev_guest' is currently used as the name for the static variable > holding a pointer to the 'sev-guest' instance. Re-purpose the name > as a local variable referring the 'sev-guest' instance, and use > that consistently throughout the code so it can be easily > distinguished from sev-common/sev-snp-guest instances. > > - 'sev' is generally used as the name for local variables holding a > pointer to the 'sev-guest' instance. In cases where that now points > to common state, use the name 'sev_common'; in cases where that now > points to state specific to 'sev-guest' instance, use the name > 'sev_guest' > > Signed-off-by: Michael Roth > --- > qapi/qom.json | 32 ++-- > target/i386/sev.c | 457 ++++++++++++++++++++++++++-------------------- > target/i386/sev.h | 3 + > 3 files changed, 281 insertions(+), 211 deletions(-) > > static SevInfo *sev_get_info(void) > { > SevInfo *info; > + SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs); > + SevGuestState *sev_guest = > + (SevGuestState *)object_dynamic_cast(OBJECT(sev_common), > + TYPE_SEV_GUEST); > > info = g_new0(SevInfo, 1); > info->enabled = sev_enabled(); > > if (info->enabled) { > - info->api_major = sev_guest->api_major; > - info->api_minor = sev_guest->api_minor; > - info->build_id = sev_guest->build_id; > - info->policy = sev_guest->policy; > - info->state = sev_guest->state; > - info->handle = sev_guest->handle; > + if (sev_guest) { > + info->handle = sev_guest->handle; > + } If we're not going to provide a value for 'handle', then we should update the QAPI for this to mark the property as optional, which would then require doing info->has_handle = true; inside this 'if' block. > + info->api_major = sev_common->api_major; > + info->api_minor = sev_common->api_minor; > + info->build_id = sev_common->build_id; > + info->state = sev_common->state; > + /* we only report the lower 32-bits of policy for SNP, ok for now... */ > + info->policy = > + (uint32_t)object_property_get_uint(OBJECT(sev_common), > + "policy", NULL); > } With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|