From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (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 E5F8F78C6C; Mon, 6 Jan 2025 02:53:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736131990; cv=none; b=lv7iOPZ2i7i5KGe82CshpZk+OeE3QuFIs01yrrmp+tEUY3r3DkNnUnbmHabIHih6P7HRQJu2v/dYv/8YWF0ivGHeQTRVDRjjkSA5voWAxFkF2F77Lx+yDQZ/5SIZUrDThqYSOfPzilBvbOTNVv3NYOEaXRS9dZhlhMnW6vQR5jk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736131990; c=relaxed/simple; bh=WJ1lnQpnjzSENphJqAYllxPMKCggrwJ0HwxYTWlZgOE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ZWWPvFH0NtbLD3USjB/CwC1+CnTOQwR04XUboaWCQZdoii2VhpvXke4aD7aS2DQy5yIkCfppX6TgVMjdoR1W1tHSbjHhRpSefZq8DnTKPf/GQWJ3FeZ1BShQSWbfzfBItGrB7bLTDj+y2hDygBEpxFvGOP4NOw75ilwOh/7jLjk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=kTv6qivf; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="kTv6qivf" 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: UahkN1oqSt2o0dHVU+swuQ== X-CSE-MsgGUID: /D9j3vJqSCe20nk9FcuDww== X-IronPort-AV: E=McAfee;i="6700,10204,11306"; a="36172787" X-IronPort-AV: E=Sophos;i="6.12,292,1728975600"; d="scan'208";a="36172787" 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 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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