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 27D83E77197 for ; Mon, 6 Jan 2025 03:01:17 +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=QgV85Nl0As6OtVQ9Lf76/StTWQ3lGWa2RIK4iy639Xk=; b=aqb1tDTud7iF7mD/0dg5mKtMca P0wCvVC8iuGv9MozOeRRIivqUse8rOV89xN9d2wOFbNH9yZEVfKAZN3tknCeFWLdoT3IBskw8e2Dw XLZxPtQA3O4dIWcT1VsDHougKqxiII3VJ5rRyGDdsISLTZs0ofqDaGrWDRYTkiiqSyjE3Nmk8O2EW 7Y5+lsk5B1GgAOBveoOah5sf98gp0cbeNZYpBqwlLgZe5QMRp2o/oGnNDcfU39XpIK8D2gzhbCUVL 7YFkfL60YriC5WT9K7oPQvCW5WApCuY0lm4oH7Lkf9HyG4bNoQkC3h/q3gdohESMmuKMKFbvrfl/D SWT1plIg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tUdMZ-000000006Yu-2bCa; Mon, 06 Jan 2025 03:01:07 +0000 Received: from mgamail.intel.com ([192.198.163.17]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tUdEq-000000005ma-3avn for linux-arm-kernel@lists.infradead.org; Mon, 06 Jan 2025 02:53:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1736131989; x=1767667989; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=WJ1lnQpnjzSENphJqAYllxPMKCggrwJ0HwxYTWlZgOE=; b=kTv6qivfCEJ3MzCCPhp9W+s3OOfC+xzOq+G8B4QRDX0GhA/AyrT5RPa4 QC2Yab7Tx33Cz1chyUPWf+uoVEHTFsjTipPYqyU7hyETEvxUrIVi/FBPg 16WYhVaFwpplFFrfN+i2c12rVXdKfU9QkEt5e8XdOeRxxc/TytYRbfCBx ws3FQn8BoKXWjjOnLlWxU3P+K1iHOZQS8oefigNsnn88ChixxKN4s6BtT 1kZReikbYIgDPIpIlhqyFqEnA9EYMbTSqlFDUsCZIAZvSPyFE7cn+Mlf9 Sv6hRD+IeWT1w3XKCh0rplCIkkb8KATKLeR7NODCXit/VWPpyExfLUFXe Q==; X-CSE-ConnectionGUID: Bb/2HMOtRJybZTt6ZBAwoQ== X-CSE-MsgGUID: c4DudSREToiqyevcL8u19g== X-IronPort-AV: E=McAfee;i="6700,10204,11306"; a="36172790" X-IronPort-AV: E=Sophos;i="6.12,292,1728975600"; d="scan'208";a="36172790" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2025 18:53:08 -0800 X-CSE-ConnectionGUID: EFOsIFRfSFiwDCSH/Pl2tA== X-CSE-MsgGUID: 725LiNAKS8SO2bQgECxPQg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,292,1728975600"; d="scan'208";a="107172729" Received: from allen-sbox.sh.intel.com (HELO [10.239.159.30]) ([10.239.159.30]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Jan 2025 18:53:03 -0800 Message-ID: <4df4d3cc-4e70-42a6-92f6-58e51b5d1048@linux.intel.com> Date: Mon, 6 Jan 2025 10:50:58 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 07/14] iommufd/viommu: Add iommufd_viommu_get_vdev_id helper To: Nicolin Chen , jgg@nvidia.com, kevin.tian@intel.com, corbet@lwn.net, will@kernel.org Cc: joro@8bytes.org, suravee.suthikulpanit@amd.com, robin.murphy@arm.com, dwmw2@infradead.org, shuah@kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, eric.auger@redhat.com, jean-philippe@linaro.org, mdf@kernel.org, mshavit@google.com, shameerali.kolothum.thodi@huawei.com, smostafa@google.com, ddutile@redhat.com, yi.l.liu@intel.com, patches@lists.linux.dev References: Content-Language: en-US From: Baolu Lu In-Reply-To: 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-20250105_185308_912483_AB3AFF29 X-CRM114-Status: UNSURE ( 9.17 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 1/4/25 03:43, Nicolin Chen wrote: > This is a reverse search v.s. iommufd_viommu_find_dev, as drivers may want > to convert a struct device pointer (physical) to its virtual device ID for > an event injection to the user space VM. > > Again, this avoids exposing more core structures to the drivers, than the > iommufd_viommu alone. > > Signed-off-by: Nicolin Chen > --- > include/linux/iommufd.h | 8 ++++++++ > drivers/iommu/iommufd/driver.c | 20 ++++++++++++++++++++ > 2 files changed, 28 insertions(+) Reviewed-by: Lu Baolu