From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D2D03D47B4 for ; Wed, 15 Jul 2026 22:35:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784154921; cv=none; b=EWEu4Cip3tUrT7bOkSKuq+38CbVAa3WU0+gP2qJ097UG2kqIyVUmym/GJbeAASuKVKl+GtACK3QuY0jcWEQCdnAx6JlITToxx7LdeDh4pqfGDaFR+VJucRO/KhNKJM7EbYKPvhfz4xKqXnEStRHakS/MZd894t7FKUvV2bP4WFE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784154921; c=relaxed/simple; bh=XRaW2nSJW/ZJH/KETqqjeqOqS+m7sEajGew9umlE19s=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=cqJPdikQq29Eab0JeKRmkWdBuUhjABf0uJiTuEESBA5uvuSQhTWnh9L0ICYz6t15yxojJksCoqqrsEv82BTSNKqIATd8Ra8FQZOUMHncKNFjZFmDcIwcFIMJvVU62O1LNcRx6TtDgf7oYg6NH5xutFzJasVPfpnYE05ASlncrbg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=RCqAKCl4; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=O/k1shjE; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="RCqAKCl4"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="O/k1shjE" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66FKPOk9711381 for ; Wed, 15 Jul 2026 22:35:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= pzttxML50p3Qjxs95TmyrNyRbKMzRVF3lav5cviw9SA=; b=RCqAKCl42KVFy3Fg 37+c9449K1KA8oZz1v7T/8dDalZTIlbiUDn43AeJzOIn3+aeIjSCAFv+Vf6cV0kM mqdzF1/qjxrsi+mBA8G6Ip0HPcURH5YKZi1l+BtIjcy4zGLC9ShAjo8Kyl1est/2 UKAdiwacGlZFttwuZ4IiKnNtxNnoEOSLOpLDTdvn7nc2zzR5VmUd4SwC5WEllC6+ 3UZyiLwZwVbdZ2kBXSc4J+LbQJlgCh8bFaG7lOBn6CKRmctQAu2Fs+ZSBWXjFl9k rQazxwYC07/EjH5jPjbAsvPJbZ6cYmj2uNC/Hzi3wtrRlybolzRQijMK2dUq4EKq h/Q3cA== Received: from mail-pg1-f200.google.com (mail-pg1-f200.google.com [209.85.215.200]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4fe7nmk17e-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Wed, 15 Jul 2026 22:35:18 +0000 (GMT) Received: by mail-pg1-f200.google.com with SMTP id 41be03b00d2f7-c891ed872ddso10444724a12.2 for ; Wed, 15 Jul 2026 15:35:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1784154917; x=1784759717; darn=vger.kernel.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=pzttxML50p3Qjxs95TmyrNyRbKMzRVF3lav5cviw9SA=; b=O/k1shjEGKcSlvHlLbx4bW6LcxhoHVdRd9ewt+Yxhpik2cc+1xPcImyKGzga4/lNOw Y0WSAbqxwEIUvbErYHr2RKuUx5Txyjcr10v325bOHyGQOpic/IbaD8OxYRnbDNSK+JBj SNvLU/fjQH3JQIDaNQcgFJfKo/Vnw+Qjnybxt1XxUwlW3nMmZftgdVxW3p4923l9a7ZU vTYf2P1xT0UqBNgZ+6vpeP9YscmwAOlz5eUtYIsWyBg64LDbMDDqX3dvhgrg/gJ3Fg4l vfrIpBUBi2bVJKzFHQ/zZWqj2BjFN/UAV0FNwUkVShR7GzQNnrVnDrLZ75OH7UntCEv0 WV/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784154917; x=1784759717; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=pzttxML50p3Qjxs95TmyrNyRbKMzRVF3lav5cviw9SA=; b=mrK/vvKHqvBFaypXHz0DEaoOlWwGxOgm7lI0eas4mysMdrnbQ0GOM2+Uib83OR+SyN 7FKcUc1Y3sZ3VDJ8bDV4nv/oFKZ217i23dFQLQ3eJlT4C6xE8fER6YL8RYSqZ9vSYXsh G3ex84zb/dHZQY5gg13ZJO0t48ybA2xDxR2nY7KfIVd2ut5sY55OtAkAYF6LAFYxBFQn Cgy9ooZsxWsDiMcWnoA5yXKzfqT6WvEWVhrDDpRUga/mnIqzZvJkI6IW/e5eSquaWgKb i51XNG98cFD6m30RMitsGVZnuDsnW+ftb3r97I9d6A2U3g5XcgdWtL0MTKfno01+/qux 94Ow== X-Forwarded-Encrypted: i=1; AHgh+Rr1z0x+Dn2JZ6SNpcC+FnRcH50w+U2wgclSySJgTiCHLtdktgm6MESZ9Fb3oWD6MRAbvj9BUGxmFmXem88=@vger.kernel.org X-Gm-Message-State: AOJu0Yy495IkwIrjmQRxWKN3C5MCB6c3nywMcgbP8AGjzkxyGXdiEpKm Qvk45kdAP1XY3K5TZhR11lFnMMU4d2W2QVinfJfxOZ7t0PbJ31kQ53U+ZxlIsHIbRujdFdnTaGn DS8u4wiBi6aNVX4NH6qHOoU3imbDYzvgHQpHgZi9hbb68TKbhb4XhAKiAai8wphHiAMc= X-Gm-Gg: AfdE7cn8GcINHWOaHHFlbvvzQRmtInPxVWosn8/DmIW8VJDJtydYk2luGcX9wS6oZ86 XdpNuOR6uPWPpX6vaDnEnERHFzArkHd9bfNHeoHdHaJA0dVQPfxYrKdBFt1BiisWvFqC3unBpbo Wl4PmgHi3/a9oVgw7jEFUSfOoXk2Z2aWnIdEq+QFXhByCjUe/EZAWdo1ms95cow7FYHTRYPxATo Bqhb/WWvepX/OWU6naXQ5lME0X7grPj9HmnCnEqHKpH//cBFi+iMSVDRfyoZXdCmcCQV4YzAbU9 NEbnnZAgyIrdJIoSm48nSeHnDU+NzWhqHkWftml/genPz9hWhEWgQ6o1oVx1mstZruAVPiVXgq9 Kp/r6+hB7BnZHh0mmXWRsoKyPJu9EKnvPocXKCxkCpfeAUc2NHjfRCm1t X-Received: by 2002:a05:6300:6705:b0:3c3:8ce8:203 with SMTP id adf61e73a8af0-3c38ce807camr143378637.50.1784154917186; Wed, 15 Jul 2026 15:35:17 -0700 (PDT) X-Received: by 2002:a05:6300:6705:b0:3c3:8ce8:203 with SMTP id adf61e73a8af0-3c38ce807camr143334637.50.1784154916555; Wed, 15 Jul 2026 15:35:16 -0700 (PDT) Received: from [10.71.178.173] (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3140e6f0dcdsm3949168eec.31.2026.07.15.15.35.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jul 2026 15:35:16 -0700 (PDT) Message-ID: <642b8ff6-5309-4500-bb62-ae5091bb7ea7@oss.qualcomm.com> Date: Wed, 15 Jul 2026 15:35:15 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] cxl/hdm: Enforce CFMWS memory type policy at decoder commit time To: Davidlohr Bueso Cc: linux-cxl@vger.kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, linux-kernel@vger.kernel.org References: <20260711003341.2602368-1-mayank.rana@oss.qualcomm.com> <20260713160448.wvkpmbldmfciq4a3@offworld> Content-Language: en-US From: Mayank Rana In-Reply-To: <20260713160448.wvkpmbldmfciq4a3@offworld> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE1MDIyNiBTYWx0ZWRfX+2VOt3x4sDZJ E9l5VIPg0t93bx2LHZj5I0FfkTPSEoveYaRhOt7sqGBUCo5HGWLlmGI/aO7r4fMdo6IOI00R/XE 6vwwb1rHRHO7JJtdT1OshX4F5suRlSA= X-Authority-Analysis: v=2.4 cv=cuGrVV4i c=1 sm=1 tr=0 ts=6a580b26 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=VwQbUJbxAAAA:8 a=R4ayLD03AAAA:8 a=bnOQvwX50u-8yI3fIb4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 a=qJlm0-shE6CLU_iKUWNr:22 X-Proofpoint-ORIG-GUID: C9CvuQldlFpUyAfARm3T2ZvPQUmpw20e X-Proofpoint-GUID: C9CvuQldlFpUyAfARm3T2ZvPQUmpw20e X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE1MDIyNiBTYWx0ZWRfXwOFn7WHD8rsf rCjCawX8urvsYNvmACzIk5MMmafeuG7S71xa9EcQ3Yab2dkQqLBEnMd1XG46SDvBfSsiiuX2FEt KVKK3m5I1uhqnFQTXA+doOIsWrj8T4MygtmRR/8CuexAnF9+o3KCMAEMtcDZqR5jAgxZkseCvrh tDjS4Za1+JAeNqIDqMlxw73Yp7zjKAh7phHYI0Y2tyKe3iE5e7edHtU2I+3um+GHDOM1Xg0MD1a Sctc+1C5DfEMylPk3Uog4dsmGR2LVx/Cqcv9FlA4Hr72cpZhxbPpmPrIXUbmDqctw6QuRPvBCqX OsqTVwAm+j0apvhUK+p0w7KpH3puIkxy3ajqiUhVqCczyoNlP/GDqEt/MHMi+aQMnIWXV6wwVhm 3YIiLQX8hTNJeX7D8q81jeDW/1kAswKyPbz2uGbkOHCtvMz/tO+zwHpD+Q3T4mqJIXHXEGziIN/ jcS5L3DKdCdE5f4kN6g== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-15_05,2026-07-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 priorityscore=1501 spamscore=0 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607150226 Hi Davidlohr Thank you for your review and suggestion. On 7/13/2026 9:04 AM, Davidlohr Bueso wrote: > On Fri, 10 Jul 2026, Mayank Rana wrote: > >> A CXL Fixed Memory Window Structure (CFMWS) in the ACPI CEDT table >> carries a restrictions field that describes the memory types a platform >> window supports.  cfmws_to_decoder_flags() translates this into >> CXL_DECODER_F_TYPE2 (HDM-DB permitted) and CXL_DECODER_F_TYPE3 (HDM-H >> permitted) flags on the root decoder. >> >> However, nothing currently prevents a caller from committing an endpoint >> or switch decoder whose target_type conflicts with the CFMWS policy: > > Hi Mayank - please refer to the latest Back Invalidate patchset (v5) > for properly dealing with this: > > https://lore.kernel.org/all/20260615145529.13848-1-dave@stgolabs.net/ Ok. I will review propose changes, and rework upon this fix. Regards, Mayank > Thanks, > Davidlohr