From mboxrd@z Thu Jan 1 00:00:00 1970 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.subspace.kernel.org (Postfix) with ESMTPS id F059F45959; Mon, 29 Jan 2024 06:03:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706508190; cv=none; b=pd0Sb2qJLNsBLU0TKl4VgpN7KV7bJLzyRiyUhZ0Ho9JZg/0pQPmMPP5sf+G8l9NrWwfF5P0ZN8fMRiemPknyboPWQLUOnmMXdAT87cnFJRyALyziCfh0OUKVVrlcIKs6/UU8tt/ImYlrLpkqdoatlWgFjR3+YUfmej6uvibbbMU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706508190; c=relaxed/simple; bh=x8/7KaoluoPO5WDySCKhzBdWae05hg8D2uInhEtRJ/M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DCQk6NAJ5/RJ5ZCZzIM2VlP7yBErQyfRF66o1HraQlhmmzXnrgtsJ/wozhNb+OUhRbysPJZOsoP/Db5FXTn63fXFbOHQlehpuIBP/0rc4IPtvyE62xOLPDm6u0hkOBT/u5ggyN5aJlOiEyfot4AcffQCuIHNfhisqkwmYu58vcc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=0M7yB0P8; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="0M7yB0P8" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=1rltRGXbUtJPiVTvee3DGElZrEg5MBSlivgvAtcJSKE=; b=0M7yB0P8rn3UkuNR6s6SHjfSpk XEdxUnGF+o4mxHea3x7MPkruVsyo4OhwBQ8gnIanhOqW4x+/24d091hGbw2Dz4Kk+kRlK+1zfZn76 7CpRazR+PjKPkHKnPh8Tf4Tjviuw0Ei52BgWHv5YKkDhJJYLcEXMAIkV5R86ivWFL5z4XURvw7V0k wTAZhwXYMoc0GNHC+gDG4CFvmDXG+lStn3RB55Fr455KZ7XSWv4M4adj9/axv/EHSV5beoq6yuQGr jSKIkG5aNmS+oX8c5y/TKu/m63RVYKG8txL04vKNhEYAfBHlU3dJee3c1p9utQ9rapNKATV4e48rM 9OmMVvKA==; Received: from hch by bombadil.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUKja-0000000BPAm-00lQ; Mon, 29 Jan 2024 06:03:06 +0000 Date: Sun, 28 Jan 2024 22:03:05 -0800 From: Christoph Hellwig To: Lu Baolu Cc: Joerg Roedel , Will Deacon , Robin Murphy , Jason Gunthorpe , Kevin Tian , iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/1] iommu/vt-d: Remove INTEL_IOMMU_BROKEN_GFX_WA Message-ID: References: <20240127064512.16744-1-baolu.lu@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <20240127064512.16744-1-baolu.lu@linux.intel.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Sat, Jan 27, 2024 at 02:45:12PM +0800, Lu Baolu wrote: > Commit 62edf5dc4a524 ("intel-iommu: Restore DMAR_BROKEN_GFX_WA option for > broken graphics drivers") was introduced 24 years ago as a temporary > workaround for graphics drivers that used physical addresses for DMA and > avoided DMA APIs. This workaround was disabled by default. > > As 24 years have passed, it is expected that graphics driver developers > have migrated their drivers to use kernel DMA APIs. Therefore, this > workaround is no longer required and could been removed. How about you Cc the intel graphics maintainers and get a confirmation?