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 4CB4DCA0EE4 for ; Tue, 19 Aug 2025 02:15:47 +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-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ao8fXZtUvfUvoPdx0AIjteI6JA+8VEuBqaU9kpWXW0o=; b=ve+n4St1EwlVB0/S2TpnYKLreD Y4iyzCExxIVLUxj5bts2P4x1KnzbSmWtAAR5YiOPVAaewXr08fDNg+9S9RasqtKyyD0I5GDC4PzN6 ntLm1pWGEdKHXpsAwK9wXcWYiq64ucIPBnOgQnEwMnhCkFkoTWpHFbCbR2RDnc2MPwJTGxYqpmoOy fZ1SY+K76zxhRbqLRwmEdzfiOMYdcz13yBkKM4dE1tnmHFHcGR+Qdwx0qi8/8wB3NG03mRiNvgnZ+ u7NGt95FkBj2vtAJjCGJMVBpdXObP4iiJqARSApnMY+WKwMeDK5wMcW8NJMFgVBQNGYC15wY4aplr Kg6KUMOA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uoBt4-00000009BPR-1iSo; Tue, 19 Aug 2025 02:15:46 +0000 Received: from mgamail.intel.com ([198.175.65.14]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uoBpc-00000009B3P-36Ew; Tue, 19 Aug 2025 02:12:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1755569533; x=1787105533; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=CtWl+kAaj28FCmgEJf0e3j5MDGUJeH2tJY2k2qK3kWg=; b=PZPCCNkhwIMPyuaF6ORZfvK68QdD4paA8cb8msomTGqk+uzAqgIans4/ t9ynyC6EDpGTkLJSq1HVT7+n/4NhPjuC9Z2NQO0YlTbtn+8Divp4fsZCz omDwuJ6D6WeEIFX1c7llldt86pUDm6Jexq67/e3dw9/GxD4LS59MRZtRR tx0U4EGJ10S6jE567QudZXJHR5MlBtPPPWI7qcbCgp4rpnIui2/xVRYW8 aeQwch35Fd1+h0WmIL5b2xygzxFghiJpwUxHtasDVzvbasuSL3GB5xryx VHF5kSGEovUhzrDR7co10STiHeew5H/vzkgEfijX1P1LU6c19nD2JfSg8 w==; X-CSE-ConnectionGUID: mXUm4nRTQqCkJBQ5TCXpcg== X-CSE-MsgGUID: 9hCkX5AuS1u+V6mfwbRUQg== X-IronPort-AV: E=McAfee;i="6800,10657,11526"; a="61637226" X-IronPort-AV: E=Sophos;i="6.17,300,1747724400"; d="scan'208";a="61637226" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2025 19:12:09 -0700 X-CSE-ConnectionGUID: BCj/97QQTnKrxK+MekdAiQ== X-CSE-MsgGUID: TE75bEPQTWKJ1Q+sONEmGA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,300,1747724400"; d="scan'208";a="171944207" Received: from allen-sbox.sh.intel.com (HELO [10.239.159.30]) ([10.239.159.30]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2025 19:12:03 -0700 Message-ID: Date: Tue, 19 Aug 2025 10:09:49 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 3/5] iommu: Add iommu_get_domain_for_dev_locked() helper To: Jason Gunthorpe Cc: Nicolin Chen , robin.murphy@arm.com, joro@8bytes.org, bhelgaas@google.com, will@kernel.org, robin.clark@oss.qualcomm.com, yong.wu@mediatek.com, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, thierry.reding@gmail.com, vdumpa@nvidia.com, jonathanh@nvidia.com, rafael@kernel.org, lenb@kernel.org, kevin.tian@intel.com, yi.l.liu@intel.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-tegra@vger.kernel.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, patches@lists.linux.dev, pjaroszynski@nvidia.com, vsethi@nvidia.com, helgaas@kernel.org, etzhao1900@gmail.com References: <20250818144051.GP802098@nvidia.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <20250818144051.GP802098@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250818_191212_916879_83E4F268 X-CRM114-Status: UNSURE ( 8.87 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 8/18/25 22:40, Jason Gunthorpe wrote: > On Fri, Aug 15, 2025 at 01:28:02PM +0800, Baolu Lu wrote: > >> Given that iommu_group->mutex is transparent to the iommu driver, how >> about > It is not actually transparent, alot of drivers are implicitly > assuming that the core single threads their struct device for alot of > the ops callbacks and we exposed the lockdep test to the drivers to > help the document this. Fair enough. It's the role of iommu_group_mutex_assert(). Thanks, baolu