From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 58AE1202F70 for ; Tue, 16 Sep 2025 04:58:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757998721; cv=none; b=OHZ4WJigadpbnTrLgFvObNpBdR6UnnrDCxCX/bdQDQVuk1jARN1R7ZkuOzTWGjf3id1e9LJGXkjJ7riJ0V0xyyrKCqU8mzFthh0XjyORbnPnnt3teQ2sQFKkttG1p9j0TX7W9+8yh1CjEKEcTrvVvHS218I1ouHj6OdhDneYFL0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757998721; c=relaxed/simple; bh=mLkW+UHC/cNrrlNRgkQdIRjdrZqLNM29lG0v4DTH+IQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=qi5wH866IUp3/JajNpBuLukOwX9yp1mQdfOyt0XLzb62JiJ9/NfWL9T27aphZswVtFsFdGaFMUrpwJ5gI924bRU5HwgKNqFQd2WsoJWXwnme5Q647QJqgike+KNHK3RG4IknVXRZbnHmQ4oSpfMEEb4mRp8jlrwtpAnux3eCy6k= 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=L9RCkOcU; arc=none smtp.client-ip=192.198.163.18 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="L9RCkOcU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1757998720; x=1789534720; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=mLkW+UHC/cNrrlNRgkQdIRjdrZqLNM29lG0v4DTH+IQ=; b=L9RCkOcU5A/QI/smiu60XNTDdp4KCHcSKfo7ijB3FbYyknWsZCzTTd/W fc4du3HbmlWUoOV7OO3dwWyg93ZADPUrihQyd793tYbZr79mOkQRBHSZE LxaIAbEmRhrr72QBeeYPYoh7+a8LOTKgQFwWTE60f/cruSFeysxXkU0Vp XDUKazSD5LywbuHgRxLRcWAWZOg+MiGBxY6Wqpi9ViJRCdSy9g6Bk+x7j 1qgr9/oLk/vMIp6NWnPR2kcwJ5bouqrVA1+3lp3A4YOSeSzKBec5vgQZG eawkBgOw/BYZSKF8tmlpo5zd14MmlGFbaqBQET86y2/dBH9L0vwLv68g7 w==; X-CSE-ConnectionGUID: 5W6lAXIwQsaee8Nl1V3psQ== X-CSE-MsgGUID: xiTbtMV0S/2gu8EFRH5jjw== X-IronPort-AV: E=McAfee;i="6800,10657,11554"; a="59489852" X-IronPort-AV: E=Sophos;i="6.18,268,1751266800"; d="scan'208";a="59489852" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2025 21:58:40 -0700 X-CSE-ConnectionGUID: x0hWP9bdRIK1qULDo7Yq2w== X-CSE-MsgGUID: GVmznKMQSuuc9TlRwIvHTQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,268,1751266800"; d="scan'208";a="174382759" Received: from allen-sbox.sh.intel.com (HELO [10.239.159.30]) ([10.239.159.30]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Sep 2025 21:58:37 -0700 Message-ID: <7a1c334d-4fc5-49c5-9e67-b220ea073f81@linux.intel.com> Date: Tue, 16 Sep 2025 12:55:48 +0800 Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/1] iommu/vt-d: Remove LPIG from page group response descriptor To: Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian , Jason Gunthorpe Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org References: <20250901053943.1708490-1-baolu.lu@linux.intel.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <20250901053943.1708490-1-baolu.lu@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/1/25 13:39, Lu Baolu wrote: > Bit 66 in the page group response descriptor used to be the LPIG (Last > Page in Group), but it was marked as Reserved since Specification 4.0. > Remove programming on this bit to make it consistent with the latest > specification. > > Existing hardware all treats bit 66 of the page group response descriptor > as "ignored", therefore this change doesn't break any existing hardware. > > Signed-off-by: Lu Baolu > --- > drivers/iommu/intel/iommu.h | 1 - > drivers/iommu/intel/prq.c | 7 ++----- > 2 files changed, 2 insertions(+), 6 deletions(-) Queued for v6.18.