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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 2A6C3EB3624 for ; Mon, 2 Mar 2026 17:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=54ms6gwdYGw/oqFQ92jKqr427TFrwbXBwadvjPkB/x0=; b=ldrr9nvr/9anCDsz1/p/IFl3fg JQvM10PsRkKEHP2Z3Pembqadk3aCXlMp644hbtVtFanY2NGZ6bp2XbFTE8F1P10BEf+86bzBTae4b HN2r86u4KZIn12VwEGISiXeOJuZtRZNhpznQkUnB5xGspMRXBajez8edVltJ88BukgapIHVghUFgc 8wWEmuZpI6WN09UwXBqPhy1VMijg/DaCdecj9n4brCOTWCokiIBUPKOiybcBt1K4Bhm913ktsXDEr uQZCCrUJ4wro64jgXdjmB6kj78AL6mUzxZlLYO0GaiMOmTYq12Mg60OLCl+axD30M/9Neg60bkj+5 BB5q/ITQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx7T5-0000000DdFJ-1ku3; Mon, 02 Mar 2026 17:54:07 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx7T3-0000000DdEX-1kyE for linux-arm-kernel@lists.infradead.org; Mon, 02 Mar 2026 17:54:06 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 8C2F340A3A; Mon, 2 Mar 2026 17:54:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 665FBC19423; Mon, 2 Mar 2026 17:54:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772474044; bh=4s2+oQrCTsTX/U0FPD1SSCHqKbKcPyx/1cjPCg2PTW0=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=VlQKop6VWWe8+QMFSAXlRcmH3fXQOhdXqKV3mCya4UL5gFuD+LUM5B/xxyt1TrhrR 1+A3KAd5SzypoD+hvQUDlWKnsL0yu8iRp0u/3mtDH/SapFFNR3LV7muf40LiwA0YOn PRHI4ypp3wovk/eSUib1GJXU/kqCBl79Si8RROAEMmXvKHn5sIG/NeUjo4S1DIvM4q TnfV9ZJ//GUTJAgAqTCFT2WPqngY7yfz4rRTGz6v2A0aurQkhPXL4gAtAGqjqGi3gs 0Se86Y0++fFvozEMpwBvepVQ015vakhO+ysL4DMrhV1gNX2hR9dCxl6wH7c4ocd32a tVZ9fLjC3CZuQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vx7T0-0000000FLi8-0hBo; Mon, 02 Mar 2026 17:54:02 +0000 Date: Mon, 02 Mar 2026 17:54:01 +0000 Message-ID: <86ms0q86di.wl-maz@kernel.org> From: Marc Zyngier To: Ben Horgan Cc: amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, carl@os.amperecomputing.com, dave.martin@arm.com, david@kernel.org, dfustini@baylibre.com, fenghuay@nvidia.com, gshan@redhat.com, james.morse@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, peternewman@google.com, punit.agrawal@oss.qualcomm.com, quic_jiles@quicinc.com, reinette.chatre@intel.com, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, tan.shaopeng@fujitsu.com, xhao@linux.alibaba.com, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, kvmarm@lists.linux.dev, zengheng4@huawei.com, linux-doc@vger.kernel.org, Shaopeng Tan Subject: Re: [PATCH v5 03/41] KVM: arm64: Make MPAMSM_EL1 accesses UNDEF In-Reply-To: <20260224175720.2663924-4-ben.horgan@arm.com> References: <20260224175720.2663924-1-ben.horgan@arm.com> <20260224175720.2663924-4-ben.horgan@arm.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: ben.horgan@arm.com, amitsinght@marvell.com, baisheng.gao@unisoc.com, baolin.wang@linux.alibaba.com, carl@os.amperecomputing.com, dave.martin@arm.com, david@kernel.org, dfustini@baylibre.com, fenghuay@nvidia.com, gshan@redhat.com, james.morse@arm.com, jonathan.cameron@huawei.com, kobak@nvidia.com, lcherian@marvell.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, peternewman@google.com, punit.agrawal@oss.qualcomm.com, quic_jiles@quicinc.com, reinette.chatre@intel.com, rohit.mathew@arm.com, scott@os.amperecomputing.com, sdonthineni@nvidia.com, tan.shaopeng@fujitsu.com, xhao@linux.alibaba.com, catalin.marinas@arm.com, will@kernel.org, corbet@lwn.net, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, kvmarm@lists.linux.dev, zengheng4@huawei.com, linux-doc@vger.kernel.org, tan.shaopeng@jp.fujitsu.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260302_095405_494461_FB4BE017 X-CRM114-Status: GOOD ( 17.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 24 Feb 2026 17:56:42 +0000, Ben Horgan wrote: > > The MPAMSM_EL1 controls the MPAM labeling for an SMCU, Streaming Mode nit: The MPAMSM_EL1 *register* controls... > Compute Unit. As there is on MPAM support in kvm, make sure MPAMSM_EL1 s/on/no/, s/kvm/KVM/. > accesses trigger an UNDEF. > > Tested-by: Gavin Shan > Tested-by: Shaopeng Tan > Tested-by: Peter Newman > Tested-by: Zeng Heng > Reviewed-by: Shaopeng Tan > Reviewed-by: Jonathan Cameron > Reviewed-by: Gavin Shan > Signed-off-by: Ben Horgan > --- > Changes since v2: > Remove paragraph from commit on allowed range of values > --- > arch/arm64/kvm/sys_regs.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c > index a7cd0badc20c..2c9a52e66fe0 100644 > --- a/arch/arm64/kvm/sys_regs.c > +++ b/arch/arm64/kvm/sys_regs.c > @@ -3373,6 +3373,8 @@ static const struct sys_reg_desc sys_reg_descs[] = { > > { SYS_DESC(SYS_MPAM1_EL1), undef_access }, > { SYS_DESC(SYS_MPAM0_EL1), undef_access }, > + { SYS_DESC(SYS_MPAMSM_EL1), undef_access }, > + > { SYS_DESC(SYS_VBAR_EL1), access_rw, reset_val, VBAR_EL1, 0 }, > { SYS_DESC(SYS_DISR_EL1), NULL, reset_val, DISR_EL1, 0 }, > Acked-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.