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 66011D1267D for ; Tue, 5 Nov 2024 10:36:51 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t8GvQ-0000OW-Uo; Tue, 05 Nov 2024 05:36:41 -0500 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 1t8GvP-0000O4-OZ for qemu-devel@nongnu.org; Tue, 05 Nov 2024 05:36:39 -0500 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 1t8GvN-0002nI-T3 for qemu-devel@nongnu.org; Tue, 05 Nov 2024 05:36:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1730802996; 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=H0znRKfH8gmYCM0WkzrwE+98pPw9YmwZD9RIHXl2Dek=; b=iY08fjO+naAm3pJ3TZtdBwXEUMjiIndymPNvr9PKZ05DKHwSgRzYY+dA6uigDNIq0k2MFQ Xg4WCPxJKF8QRimrMoRm7Zuhgmj3xwqxE7t3so5txe/poBRtIvZZoWj8fGDZLOxK99BSbF tSPmPdX5LQpW6JN40ukqQnGATVh2o3o= 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-586--NhhC3l6M9yuZexxitc6SQ-1; Tue, 05 Nov 2024 05:36:33 -0500 X-MC-Unique: -NhhC3l6M9yuZexxitc6SQ-1 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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id F057A19560A1; Tue, 5 Nov 2024 10:36:31 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.52]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6967C19560A3; Tue, 5 Nov 2024 10:36:26 +0000 (UTC) Date: Tue, 5 Nov 2024 10:36:22 +0000 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Xiaoyao Li Cc: Paolo Bonzini , Riku Voipio , Richard Henderson , Zhao Liu , "Michael S. Tsirkin" , Marcel Apfelbaum , Igor Mammedov , Ani Sinha , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Yanan Wang , Cornelia Huck , Eric Blake , Markus Armbruster , Marcelo Tosatti , rick.p.edgecombe@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org Subject: Re: [PATCH v6 13/60] i386/tdx: Validate TD attributes Message-ID: References: <20241105062408.3533704-1-xiaoyao.li@intel.com> <20241105062408.3533704-14-xiaoyao.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20241105062408.3533704-14-xiaoyao.li@intel.com> User-Agent: Mutt/2.2.13 (2024-03-09) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 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: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.34, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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 Tue, Nov 05, 2024 at 01:23:21AM -0500, Xiaoyao Li wrote: > Validate TD attributes with tdx_caps that fixed-0 bits must be zero and > fixed-1 bits must be set. > > Besides, sanity check the attribute bits that have not been supported by > QEMU yet. e.g., debug bit, it will be allowed in the future when debug > TD support lands in QEMU. > > Signed-off-by: Xiaoyao Li > Acked-by: Gerd Hoffmann > > --- > Changes in v3: > - using error_setg() for error report; (Daniel) > --- > target/i386/kvm/tdx.c | 28 ++++++++++++++++++++++++++-- > 1 file changed, 26 insertions(+), 2 deletions(-) > > diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c > index 6cf81f788fe0..5a9ce2ada89d 100644 > --- a/target/i386/kvm/tdx.c > +++ b/target/i386/kvm/tdx.c > @@ -20,6 +20,7 @@ > #include "kvm_i386.h" > #include "tdx.h" > > +#define TDX_TD_ATTRIBUTES_DEBUG BIT_ULL(0) > #define TDX_TD_ATTRIBUTES_SEPT_VE_DISABLE BIT_ULL(28) > #define TDX_TD_ATTRIBUTES_PKS BIT_ULL(30) > #define TDX_TD_ATTRIBUTES_PERFMON BIT_ULL(63) > @@ -141,13 +142,33 @@ static int tdx_kvm_type(X86ConfidentialGuest *cg) > return KVM_X86_TDX_VM; > } > > -static void setup_td_guest_attributes(X86CPU *x86cpu) > +static int tdx_validate_attributes(TdxGuest *tdx, Error **errp) > +{ > + if ((tdx->attributes & ~tdx_caps->supported_attrs)) { > + error_setg(errp, "Invalid attributes 0x%lx for TDX VM " > + "(supported: 0x%llx)", > + tdx->attributes, tdx_caps->supported_attrs); > + return -1; Minor whitespace accident, with indentation too deep. > + } > + > + if (tdx->attributes & TDX_TD_ATTRIBUTES_DEBUG) { > + error_setg(errp, "Current QEMU doesn't support attributes.debug[bit 0] " > + "for TDX VM"); > + return -1; > + } > + > + return 0; > +} 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 :|