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 EAFEB1125847 for ; Wed, 11 Mar 2026 15:49:14 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w0Lo6-0001Yz-12; Wed, 11 Mar 2026 11:49:10 -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 1w0Lnq-0001TC-0M; Wed, 11 Mar 2026 11:48:57 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w0Lnm-000137-H3; Wed, 11 Mar 2026 11:48:52 -0400 Received: from mail.maildlp.com (unknown [172.18.224.150]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4fWFXS2cDYzHnH5R; Wed, 11 Mar 2026 23:48:40 +0800 (CST) Received: from dubpeml500005.china.huawei.com (unknown [7.214.145.207]) by mail.maildlp.com (Postfix) with ESMTPS id 4DC164056A; Wed, 11 Mar 2026 23:48:48 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml500005.china.huawei.com (7.214.145.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 11 Mar 2026 15:48:47 +0000 Date: Wed, 11 Mar 2026 15:48:46 +0000 To: Peter Maydell CC: , Subject: Re: [PATCH 33/65] target/arm: GICv5 cpuif: Implement ICC_IAFFIDR_EL1 Message-ID: <20260311154846.0000098c@huawei.com> In-Reply-To: <20260223170212.441276-34-peter.maydell@linaro.org> References: <20260223170212.441276-1-peter.maydell@linaro.org> <20260223170212.441276-34-peter.maydell@linaro.org> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.15] X-ClientProxiedBy: lhrpeml500011.china.huawei.com (7.191.174.215) To dubpeml500005.china.huawei.com (7.214.145.207) Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.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, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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: , Reply-to: Jonathan Cameron From: Jonathan Cameron via Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On Mon, 23 Feb 2026 17:01:40 +0000 Peter Maydell wrote: > The CPU system register ICC_IAFFIDR_EL1 is a read-only register that > tells the guest what the affinity ID of that CPU is. > > Implement this register. In real hardware using the stream protocol, > the IRS tells the CPU its IAFFID using a DownstreamControl command as > part of the handshake process when the IRS-CPU link is brought > online. Our analogue of this is to pass the IAFFID as an extra > argument to gicv5_set_gicv5state(). (We could have the CPU call into > the GIC every time to ask for the value, but this would mean we had > to search the cpus[] array for the right CPU to return its IAFFID.) > > Note that we don't put the IAFFID into the gicv5_cpuif sub-struct, > because that part of the CPU struct is zeroed on reset, and we must > keep the IAFFID across reset (we only set it up when the GIC device > is created). > > Signed-off-by: Peter Maydell Reviewed-by: Jonathan Cameron 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 50C281125847 for ; Wed, 11 Mar 2026 15:49:32 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w0LoB-0001q4-5n; Wed, 11 Mar 2026 11:49:15 -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 1w0Lnq-0001TC-0M; Wed, 11 Mar 2026 11:48:57 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w0Lnm-000137-H3; Wed, 11 Mar 2026 11:48:52 -0400 Received: from mail.maildlp.com (unknown [172.18.224.150]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4fWFXS2cDYzHnH5R; Wed, 11 Mar 2026 23:48:40 +0800 (CST) Received: from dubpeml500005.china.huawei.com (unknown [7.214.145.207]) by mail.maildlp.com (Postfix) with ESMTPS id 4DC164056A; Wed, 11 Mar 2026 23:48:48 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml500005.china.huawei.com (7.214.145.207) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 11 Mar 2026 15:48:47 +0000 Date: Wed, 11 Mar 2026 15:48:46 +0000 To: Peter Maydell CC: , Subject: Re: [PATCH 33/65] target/arm: GICv5 cpuif: Implement ICC_IAFFIDR_EL1 Message-ID: <20260311154846.0000098c@huawei.com> In-Reply-To: <20260223170212.441276-34-peter.maydell@linaro.org> References: <20260223170212.441276-1-peter.maydell@linaro.org> <20260223170212.441276-34-peter.maydell@linaro.org> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.203.177.15] X-ClientProxiedBy: lhrpeml500011.china.huawei.com (7.191.174.215) To dubpeml500005.china.huawei.com (7.214.145.207) Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.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, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron From: Jonathan Cameron via qemu development Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, 23 Feb 2026 17:01:40 +0000 Peter Maydell wrote: > The CPU system register ICC_IAFFIDR_EL1 is a read-only register that > tells the guest what the affinity ID of that CPU is. > > Implement this register. In real hardware using the stream protocol, > the IRS tells the CPU its IAFFID using a DownstreamControl command as > part of the handshake process when the IRS-CPU link is brought > online. Our analogue of this is to pass the IAFFID as an extra > argument to gicv5_set_gicv5state(). (We could have the CPU call into > the GIC every time to ask for the value, but this would mean we had > to search the cpus[] array for the right CPU to return its IAFFID.) > > Note that we don't put the IAFFID into the gicv5_cpuif sub-struct, > because that part of the CPU struct is zeroed on reset, and we must > keep the IAFFID across reset (we only set it up when the GIC device > is created). > > Signed-off-by: Peter Maydell Reviewed-by: Jonathan Cameron