From nobody Thu Apr 2 09:29:22 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B54763A8746; Fri, 13 Mar 2026 14:46:53 +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=1773413215; cv=none; b=CkeOFwBWFKBi6ZCG5k7pUCUA6WeTSi2N7hYs0b8xqJ/Nb4VUJKDu6ZDY1JQ/9gXYgPnZLopwWlZiaYnS8QL+YJnqEKQXmggboQHWs6ldHE0LxXkHDJLr2tapJWtZ+nGA5ZeoekoA2UtIGLMpFQssUSIXsDpVe6Y+A8sQdHQknz0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773413215; c=relaxed/simple; bh=1GA3xAPKycpOz13LWcMLE6TUzrc2T33arZ2HoT1DFT8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t1FHv85w4WKqBXEtkUoE3xXXCdi3Fe7KQfmOrhmQaa8NpWqJOPAXevALRhtWQgDepYA5hJQcGUNlWoDB1CcLsdoj7uMGpTP/H377knHykyFLc8uha/9OxAB4TydqgnCCXPAtO24T+ecYP1xs8wv8DeAtg0MLH62V5i62qTm4yQA= 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 0616A2308; Fri, 13 Mar 2026 07:46:47 -0700 (PDT) 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 343633F7BD; Fri, 13 Mar 2026 07:46:49 -0700 (PDT) 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 v6 05/40] KVM: arm64: Make MPAMSM_EL1 accesses UNDEF Date: Fri, 13 Mar 2026 14:45:42 +0000 Message-ID: <20260313144617.3420416-6-ben.horgan@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260313144617.3420416-1-ben.horgan@arm.com> References: <20260313144617.3420416-1-ben.horgan@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The MPAMSM_EL1 register controls the MPAM labeling for an SMCU, Streaming Mode Compute Unit. As there is no 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 Tested-by: Punit Agrawal Reviewed-by: Zeng Heng Reviewed-by: Shaopeng Tan Reviewed-by: Jonathan Cameron Reviewed-by: Gavin Shan Acked-by: Marc Zyngier 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 1b4cacb6e918..0edd655934a9 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3376,6 +3376,8 @@ static const struct sys_reg_desc sys_reg_descs[] =3D { =20 { 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 }, =20 --=20 2.43.0