From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC4262144A1 for ; Tue, 29 Apr 2025 08:31:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745915483; cv=none; b=RTL7uoJms26jt9qn0sHRH4EGfUTu2ciP72vucMRMb4Wk5LrseXxVFyINURVahyO4jPNhzwDFcppQF9JgLhUUUWW8wJViMGS+qpO9OA43RxVEJasptdqu0/jRRIhmB9uqJN86PmLSCuLbrFi7mzJ00QMZPQELiiuzxbbEumf8tME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745915483; c=relaxed/simple; bh=85qKaVraS+9MNdskLBxSjS9ktFkx0yQSDGXvIR/OvQI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KJ2kGIIiiESu7dlzIu7zgIk5NGZf/zZhwI1Venxd1uUyvbB/x5YVI1Owf3epMPbTE1U9yzgRkc6jHMcBIgOuyCEqXaGxKwxjtIRfu73azReXfQAGfKAT0Fht8VcJwo/akpBwV2de4bM2kPIWN5UvAN2ZMCVoD+DoRnH+0WY8+7A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=oAodT9uA; arc=none smtp.client-ip=209.85.214.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="oAodT9uA" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-2242ac37caeso52895ad.1 for ; Tue, 29 Apr 2025 01:31:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1745915481; x=1746520281; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=TNi2KjTVYx94VsJLpl+aLzT0MDWDcyauEZBdUwqWejg=; b=oAodT9uAJPpRkgB3B/eY+TMN04Fr3Putxl7q1c9Y+evLoj9i/ms+hT5HWJDs1hTnOK d7wuMLxYD/czi7XXAIs+5pmHtC0hnxx1y7ekzhsOrYHXspWK5JDSm8bujYtOQCQCtbkH ap5kE5qJ4qsOjatA9vGFq+a6r52hqDc30+i8/EJ8Be3kEd4cDaQqDtFP8PszYpaOe6HZ cLf3ZMz2D3E1t04HD8iyhPcOoCCUa/G926U42LrA5DQ7CJbB0PV4Vz9j5y6WvWwQ+4Bh Xjs1lABiyE0wzToxARN4fCJLQ42WCqAwRTwVF31zt9jxP3EfB7LidjyQAmwW6wMQEpKD ZQMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1745915481; x=1746520281; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=TNi2KjTVYx94VsJLpl+aLzT0MDWDcyauEZBdUwqWejg=; b=hLUEZPRBRYCRIEscpj+fWo+/RSh5qOgRTVeHgVk5vRPdEGcLisE27jWfeDXJYVq1t8 TT/fsWBYfHD29qRcBqjy/TSWGjxz6mn8pngQ3aP0b9urC6BmMwKWfKWSUlOh4XKKvWGp q0Ex/9YWHwP+r7TIupMezPciCVlPlxm8Iu1NNWuHPUeZvsJr04dnr9UL8wWIErYt5Gd/ XQQKfxK670xZklAwAt5d3jX/W/LjoHliuBSIda4vVenkwKNkYTmOt9LF1OXui+EbIwmY UkcMIoy2BLTOjgfMYukZ4Y00rJwlmf7RZi4On7DrMcrQlRqkTBiWU9b3G0mGgDwRoHvG Zfug== X-Forwarded-Encrypted: i=1; AJvYcCVMwk15yFGf0oCw4nVU02vLpDuIKG1Fv2IJ2l8wEDF5Ql+fSpzXFycyC0EsUEdx4B5EC81LDgp8b3VMUqYCn78=@vger.kernel.org X-Gm-Message-State: AOJu0Yyjn4hxYCUX+gzCdHk291ZtiD/z11PVHXdzwsnQN17ghvpcdz2s w799DAuug4IVzXUcCGSpreCRpzHDpfFxCDJ1hdvg2n28Aj+j9rSdMwUHSsP+8g== X-Gm-Gg: ASbGncupmdDVCQL8pAq7pPxAK9ppMg/05MM1h7dAvUS5RFrFXRiGBxPp0oFk5viW5bL byZZBCj7anF4D36U2HrQR+MSOyqvz2t5vBG2Oim3uF4201y+gtdF+b3szCdLbHayrzpFmnwgY/q Jk+X1a2Y6hWAZ1mUuxAn61Byvf4qf4DntPGZtiZmJsG89RJyMcWC2m6igaNyNy+ZRSg0ls4u4aV 9rKWHmeRF/1QWPflL+DqzL8uYfF2uEfZf+zNhLcFNIBwldk3UXnkbhHY+A/uUYtC8zRRiB/4Up+ 8paE9PTC/VaRfS3V8fKHcAeAEnHu81IIAzJ/kcY3EGeyezMP9BOTTHrHp2ur2EnqoyuSRZKC X-Google-Smtp-Source: AGHT+IEuwEN6Vz0nl2aEx/jObUHE3H07L74jGS/5bsNXpJR+QacDK6nh9jI6VmQObGdH+OZv4saKuQ== X-Received: by 2002:a17:903:1cd:b0:21f:465d:c588 with SMTP id d9443c01a7336-22de6c52c70mr2586365ad.14.1745915480493; Tue, 29 Apr 2025 01:31:20 -0700 (PDT) Received: from google.com (2.210.143.34.bc.googleusercontent.com. [34.143.210.2]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-309ef124ce9sm10440195a91.34.2025.04.29.01.31.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Apr 2025 01:31:19 -0700 (PDT) Date: Tue, 29 Apr 2025 08:31:08 +0000 From: Pranjal Shrivastava To: Nicolin Chen Cc: jgg@nvidia.com, kevin.tian@intel.com, corbet@lwn.net, will@kernel.org, bagasdotme@gmail.com, robin.murphy@arm.com, joro@8bytes.org, thierry.reding@gmail.com, vdumpa@nvidia.com, jonathanh@nvidia.com, shuah@kernel.org, jsnitsel@redhat.com, nathan@kernel.org, peterz@infradead.org, yi.l.liu@intel.com, mshavit@google.com, zhangzekun11@huawei.com, iommu@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-kselftest@vger.kernel.org, patches@lists.linux.dev, mochs@nvidia.com, alok.a.tiwari@oracle.com, vasant.hegde@amd.com Subject: Re: [PATCH v2 04/22] iommu: Add iommu_copy_struct_to_user helper Message-ID: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Apr 28, 2025 at 11:21:43AM -0700, Nicolin Chen wrote: > On Mon, Apr 28, 2025 at 05:50:28PM +0000, Pranjal Shrivastava wrote: > > On Fri, Apr 25, 2025 at 10:57:59PM -0700, Nicolin Chen wrote: > > > Similar to the iommu_copy_struct_from_user helper receiving data from the > > > user space, add an iommu_copy_struct_to_user helper to report output data > > > back to the user space data pointer. > > > > > > Reviewed-by: Jason Gunthorpe > > > Signed-off-by: Nicolin Chen > > > --- > > > include/linux/iommu.h | 40 ++++++++++++++++++++++++++++++++++++++++ > > > 1 file changed, 40 insertions(+) > > > > > > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > > > index ba7add27e9a0..634ff647888d 100644 > > > --- a/include/linux/iommu.h > > > +++ b/include/linux/iommu.h > > > @@ -562,6 +562,46 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size, > > > return 0; > > > } > > > > > > +/** > > > + * __iommu_copy_struct_to_user - Report iommu driver specific user space data > > > + * @dst_data: Pointer to a struct iommu_user_data for user space data location > > > + * @src_data: Pointer to an iommu driver specific user data that is defined in > > > + * include/uapi/linux/iommufd.h > > > + * @data_type: The data type of the @dst_data. Must match with @src_data.type > > ^ > > Nit: Must match with @dst_data type. > > Oh, that's a copy-n-paste mistake. It should be: > * @data_type: The data type of the @src_data. Must match with @dst_data.type Ack, yes that's what I meant! > > Thanks! > Nicolin Thanks, Praan