From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-pp-o94.zoho.com (sender4-pp-o94.zoho.com [136.143.188.94]) (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 475654A11; Mon, 30 Jun 2025 04:57:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.94 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751259433; cv=pass; b=TTxvomKpGIlwtPHL5Xo+gHreUim23Xb4YPm04SImEZj920I546io8yTBSfWhOGDav7gj9RTZuRtwM6Ejr+0Ogn4Z0eLPtT/QpmsIblHqf2ddbvKpMsJ6IWbE9ijsqaVa/pDuu5jBGZ8QLwy0aXWbzHJswrIuXxGg5qEJ02SL52o= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751259433; c=relaxed/simple; bh=tsPzHoTP69t7UQGuZNF5lccrCFCkO2R+bQABb5/VYo0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fzXGJtkfPo36ynLLS59/rag9RLXcADLt23QxjK9nAozMDXuLgrJS9C5SAKwK4tjUj2H0wXllTP6WD5azLCY6hyWU0v4yhSMEimmgNM+A6zY+P6eGg1q4i5BPMJBMUo1b64sswJ7BP8MLKzCs4mNfcWE4U8mHOcE13zlIAI+UXsE= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com; spf=pass smtp.mailfrom=zohomail.com; dkim=pass (1024-bit key) header.d=zohomail.com header.i=ming.li@zohomail.com header.b=BUp2IR4d; arc=pass smtp.client-ip=136.143.188.94 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zohomail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zohomail.com header.i=ming.li@zohomail.com header.b="BUp2IR4d" ARC-Seal: i=1; a=rsa-sha256; t=1751259412; cv=none; d=zohomail.com; s=zohoarc; b=aNBxOG9MrqP8RezOUv56vdKKnG+C7aGLjygJSDs8fV72lMpDlEIZIJ4jYydgaPgLWGfYfX/rV9AxWxSkKUOd1RxzgvKLkQcRhPa0ojrzq2wpQC0HbDnpXvDdJc0ZJOUH4Y2zU+RXXOAXjmqjD7VFTTwyLifimToRDYTYXUVpjsY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1751259412; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=jGKWoTpD7SxWUMBPwQaXaTR3Gama9L+E0Wl4eK3bRmU=; b=YCld4xI1WsRJfRG1mlbAeiH5M73pInTi36MyA8fQS4CC3GgrZfJzQIqqLgrrPo68/rA/I2Flzh+t7+MmyRhRxbkZ+IHbtg/4tslQOAwycqmv/Bs6Ajp1Bacb+dLxHZkKqWpU/OOeQw3014KwwROmbwuFbKntCblsXDBuWF2jHqs= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=zohomail.com; spf=pass smtp.mailfrom=ming.li@zohomail.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1751259412; s=zm2022; d=zohomail.com; i=ming.li@zohomail.com; h=Message-ID:Date:Date:MIME-Version:Subject:Subject:To:To:Cc:Cc:References:From:From:In-Reply-To:Content-Type:Content-Transfer-Encoding:Feedback-ID:Message-Id:Reply-To; bh=jGKWoTpD7SxWUMBPwQaXaTR3Gama9L+E0Wl4eK3bRmU=; b=BUp2IR4dGhIeW2SchfspdU2qvt19KLKhDgaW/ZCMFAGvfk+WvxPG1P9kfJDQjEYA N91Aebty7vhdehflrhuTxKYMKdkXPCEDg6Lial2TiYUlsdT/wU1ZQB98+m6kr9u2YrI FXTz+0BIAxtHVF9a+xahxlkLUXNrcTyRF+0jIXoQ= Received: by mx.zohomail.com with SMTPS id 1751259411024461.30494157265355; Sun, 29 Jun 2025 21:56:51 -0700 (PDT) Message-ID: <03c83257-defd-4083-970b-9b803442e792@zohomail.com> Date: Mon, 30 Jun 2025 12:56:48 +0800 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 2/2] cxl/core: Add a helper function to check dpa availability To: Alison Schofield Cc: dave@stgolabs.net, jonathan.cameron@huawei.com, dave.jiang@intel.com, vishal.l.verma@intel.com, ira.weiny@intel.com, dan.j.williams@intel.com, shiju.jose@huawei.com, linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250629082042.256123-1-ming.li@zohomail.com> <20250629082042.256123-2-ming.li@zohomail.com> From: Li Ming In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Feedback-ID: rr080112279800526b93a969bfa6dd1fa300003ab9feb424604d0d1bf076f71a6a5b5ced1a2ce74130e6a15d:zu080112273f5149f167ad1fe50fdde0570000acde40cc24b4bc4df2b4ae94173601471b183924a58d120e8e:rf0801122dc953c5b6d4687a0ae5f19f6a000020a6b9e4d434071a42d47b58c3f86f693ce01caaa9ac6b2363b3a8ce2f3a8b:ZohoMail X-ZohoMailClient: External On 6/30/2025 9:41 AM, Alison Schofield wrote: > On Sun, Jun 29, 2025 at 04:20:42PM +0800, Li Ming wrote: >> In CXL subsystem, many pieces of code that need to check dpa >> availability in case using wrong dpa. Add a helper function called >> is_valid_dpa() for dpa availability checking. > Does this have anything DPA special about it. Could it be done in I think no special DPA here, my understanding is that all DPA should be included in cxlds->dpa_res. > in a new helper like resource_contains_addr() for all to employ. > In CXL, we'd use it in at least one more place, checking for HPA > in a region resource. That is a good idea, I will add it into include/linux/ioport.h > > -- Alison > Ming [snip]