From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 91F393AA1B2; Tue, 24 Feb 2026 17:57:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771955872; cv=none; b=dyIVJdlRbLcc86fFzStizrK9iC9byvN57ooDEDvFqaZ74MYVrcreKGCP3iTVEMUYkrjNQTNGQG/wcT4Ue0T/NrCOVwHqMlWSVzmD+ZEI8CHIRfokRqHeVwxwWvbnBCpKtTz4ZIVmFLg9f1VDnWQQrLYkp82zxfg6TKTuqdqL+90= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771955872; c=relaxed/simple; bh=eKUkZfiD7xgyVQLtIo8zIq2SITCc0WruY6IWK5fiEM4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ls1Ek0564+FnERGXxWcEhtb3szMneF3I1MZVEuRHNPCkSug2GuoG+rOWduSRU8Md39ixvb4kXLM9dEtxSpvBV5BhvrshL6zYkrm9QIZ/vpujaX70h7Gyag3dFALmFHYIXhMiyT29X2hrNWYR865mcz3tZ31gjlwEqg2vChRVAjs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AE447497; Tue, 24 Feb 2026 09:57:43 -0800 (PST) Received: from e134344.cambridge.arm.com (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1A7DD3F59E; Tue, 24 Feb 2026 09:57:44 -0800 (PST) From: Ben Horgan To: ben.horgan@arm.com 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, maz@kernel.org, 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: [PATCH v5 03/41] KVM: arm64: Make MPAMSM_EL1 accesses UNDEF Date: Tue, 24 Feb 2026 17:56:42 +0000 Message-ID: <20260224175720.2663924-4-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260224175720.2663924-1-ben.horgan@arm.com> References: <20260224175720.2663924-1-ben.horgan@arm.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The MPAMSM_EL1 controls the MPAM labeling for an SMCU, Streaming Mode Compute Unit. As there is on MPAM support in kvm, make sure MPAMSM_EL1 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 }, -- 2.43.0