From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 F0758143C7E; Thu, 5 Sep 2024 03:49:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725508196; cv=none; b=bYxpHF43rIe94Or7HEM3LEkujC460YyXAZ/t0rGHefkWoucs/lCoP1H76S0GWWGu3aNV+x6XYmSW10j1eB1DCXNCxNacGSgHS8E2dawczYmZdE96ua36p/wjcyoXKa6G0M4UQxqbF++yOmlmLVTlkGegIBY35LgRWWBeBM8aLAs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725508196; c=relaxed/simple; bh=RAteYIaNnUAZW65hHa+40QC8nCjTx4WeIyD12L3SoJE=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=a91zoXAvWI1CFIsLQR2exk+F3er5OIo+YcDBRCx1ACtAldC4XvezjLdg/jxPwn+/GhIIttBOJuFXShR3fUucLek/0RtrXiJbbMLfgRK5jTWr6uMut3MgToD9m7D8/rbEYjVRY8zxIShcKJlcThVKfBS64ejfFAUfruepLcz8gLc= 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=OCHlZUwI; arc=none smtp.client-ip=192.198.163.19 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="OCHlZUwI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1725508195; x=1757044195; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=RAteYIaNnUAZW65hHa+40QC8nCjTx4WeIyD12L3SoJE=; b=OCHlZUwIolb3ClLVcyxnThY4gQoA1LoStASsXO+Kdw7k9l0XkyZmCiFT ptxdVs+551IcnJGVn31z9wKKQ6n0MZbdiFfwZ/0ifKOoDslILUZ1FKWqF P6Uxcyfb4upyzYUkD7nGqrUtGH1FBlZFiAH0ipn/Ju7iD64EmFHt92l69 qitN3N9cMXX+KMYc3F4k2QrziRIhAcD87BEvKeh6P35p9tXUUOgJ7laBz BLVeHjbsgEIjF2+2BXkLpXzy1Sw9G/p1knNVJ8cYhKzTitqEadCQdIo2C qsoDGPomLoQci8QVrDCp8bpiQnxMOIJYyPfLyQHsHputOVDpI5GMlHGn7 A==; X-CSE-ConnectionGUID: qtvYkXZ5R5qI0Wn/+x+6Vw== X-CSE-MsgGUID: fbzqLSHUTyOXpd9XoaWmmQ== X-IronPort-AV: E=McAfee;i="6700,10204,11185"; a="23761796" X-IronPort-AV: E=Sophos;i="6.10,203,1719903600"; d="scan'208";a="23761796" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2024 20:49:54 -0700 X-CSE-ConnectionGUID: UXc+KRgWS2u2yWZRevyL/w== X-CSE-MsgGUID: k84odTRHTHGLh5cC11PvSg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,203,1719903600"; d="scan'208";a="65722623" Received: from allen-box.sh.intel.com (HELO [10.239.159.127]) ([10.239.159.127]) by fmviesa010.fm.intel.com with ESMTP; 04 Sep 2024 20:49:52 -0700 Message-ID: <97bc177f-49ba-48cc-9dd3-37f79b1432b6@linux.intel.com> Date: Thu, 5 Sep 2024 11:45:55 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: baolu.lu@linux.intel.com, jani.saarinen@intel.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH 1/1] iommu/vt-d: Prevent boot failure with devices requiring ATS To: Mark Pearson , Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian References: <20240904060705.90452-1-baolu.lu@linux.intel.com> <0dc9ac00-1148-4c64-8c12-4d08a2a27429@app.fastmail.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <0dc9ac00-1148-4c64-8c12-4d08a2a27429@app.fastmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/5/24 2:00 AM, Mark Pearson wrote: > Hi Lu, > > Tested this on an X1 Carbon G12 with a kernel built form drm-tip and this patch - and was able to boot successfully with pci=noats > > Tested-by: Mark Pearson Thank you! > > Mark > > PS - note on small typo below. > > On Wed, Sep 4, 2024, at 2:07 AM, Lu Baolu wrote: >> SOC-integrated devices on some platforms require their PCI ATS enabled >> for operation when the IOMMU is in scalable mode. Those devices are >> reported via ACPI/SATC table with the ATC_REQUIRED bit set in the Flags >> field. >> >> The PCI subsystem offers the 'pci=noats' kernel command to disable PCI >> ATS on all devices. Using 'pci=noat' with devices that require PCI ATS > pci=noats Fixed. Thanks, baolu