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 7D28C108E1FC for ; Thu, 19 Mar 2026 12:03:25 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w3C5M-00065k-65; Thu, 19 Mar 2026 08:02:44 -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 1w3C5C-00060V-7K for qemu-arm@nongnu.org; Thu, 19 Mar 2026 08:02:34 -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 1w3C5A-0003sW-I7 for qemu-arm@nongnu.org; Thu, 19 Mar 2026 08:02:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1773921751; 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=gW9btTrUwVcKATrCcXs1ELji0esgye0fWpCs3tg2EGY=; b=NfcAnnWqjEODDcfNfDTkbHC+Snwdl26Wd2iDQnOdTQ3k5AbaRxmOA5p3xYnjOG/pV1zMPj lfFQ57RI18UkfYgwNL6tYFTELzEWn4Gc0NO7JC7Ij1N08kDRcNMdo04s+33UKtwnyESKiX B7B7IHqcNLw9CIWU2cNZDQt8oUiZYWs= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-480-jQKAt9P7MaqRwnBCx3g7bQ-1; Thu, 19 Mar 2026 08:02:28 -0400 X-MC-Unique: jQKAt9P7MaqRwnBCx3g7bQ-1 X-Mimecast-MFC-AGG-ID: jQKAt9P7MaqRwnBCx3g7bQ_1773921747 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 1EA6318002FC; Thu, 19 Mar 2026 12:02:27 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.6]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B5F801955D84; Thu, 19 Mar 2026 12:02:26 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 4C65221E6937; Thu, 19 Mar 2026 13:02:24 +0100 (CET) From: Markus Armbruster To: Nathan Chen Cc: qemu-devel@nongnu.org, qemu-arm@nongnu.org, Eric Auger , Peter Maydell , "Michael S . Tsirkin" , Igor Mammedov , Ani Sinha , Shannon Zhao , Paolo Bonzini , Daniel P . =?utf-8?Q?Berrang=C3=A9?= , Eric Blake , Shameer Kolothum , Matt Ochs , Nicolin Chen Subject: Re: [PATCH v4 4/8] qdev: Add a SsidSizeMode property In-Reply-To: <20260318184907.4060030-5-nathanc@nvidia.com> (Nathan Chen's message of "Wed, 18 Mar 2026 11:49:03 -0700") References: <20260318184907.4060030-1-nathanc@nvidia.com> <20260318184907.4060030-5-nathanc@nvidia.com> Date: Thu, 19 Mar 2026 13:02:24 +0100 Message-ID: <87jyv89gdr.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-MFC-PROC-ID: hX77wEvPHUjWDjc51xTKI1cScKd2NszYVJCb8tVQ4cg_1773921747 X-Mimecast-Originator: redhat.com Content-Type: text/plain Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -3 X-Spam_score: -0.4 X-Spam_bar: / X-Spam_report: (-0.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Nathan Chen writes: > From: Nathan Chen > > Introduce a new enum type property allowing to set a Substream ID size > for HW-accelerated smmuv3. Values are auto and 0..20. The auto value > allows SSID size property to be derived from host IOMMU capabilities. > A value of 0 disables SubstreamID, while non-zero values specify the > SSID size in bits. > > Reviewed-by: Eric Auger > Tested-by: Eric Auger > Signed-off-by: Nathan Chen [...] > diff --git a/qapi/misc-arm.json b/qapi/misc-arm.json > index f921d740f1..76ea0a09fa 100644 > --- a/qapi/misc-arm.json > +++ b/qapi/misc-arm.json > @@ -45,3 +45,19 @@ > # { "version": 3, "emulated": false, "kernel": true } ] } > ## > { 'command': 'query-gic-capabilities', 'returns': ['GICCapability'] } > + > +## > +# @SsidSizeMode: > +# > +# SMMUv3 SubstreamID size configuration mode. > +# > +# @auto: derive from host IOMMU capabilities > +# > +# Values 0-20: SSIDSIZE value in bits. 0 disables SubstreamID. > +# > +# Since: 11.0 > +## > +{ 'enum': 'SsidSizeMode', > + 'data': [ 'auto', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', > + '10', '11', '12', '13', '14', '15', '16', '17', '18', > + '19', '20' ] } # order matters, see ssid_size_mode_auto() As pointed out in review of the RFC, generated documentation will look fairly bad, but we lack the means to do better right now. > diff --git a/qapi/pragma.json b/qapi/pragma.json > index 193bc39059..24aebbe8f5 100644 > --- a/qapi/pragma.json > +++ b/qapi/pragma.json > @@ -68,6 +68,7 @@ > 'S390CpuEntitlement', > 'S390CpuPolarization', > 'S390CpuState', > + 'SsidSizeMode', > 'String', > 'StringWrapper', > 'SysEmuTarget', QAPI schema Acked-by: Markus Armbruster