From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F3C1C38A2D for ; Wed, 26 Oct 2022 12:45:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233445AbiJZMpc (ORCPT ); Wed, 26 Oct 2022 08:45:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233473AbiJZMpa (ORCPT ); Wed, 26 Oct 2022 08:45:30 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 374508BB8A; Wed, 26 Oct 2022 05:45:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666788329; x=1698324329; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=ABNx+msEoxiE0Up/NA4YUsZE1sxvOirm9dovIGgVQBY=; b=eH7reX7OgdEIT5Us9JYkZEdF4sVa4hzCT/kGcwmvGEpz8F9+x0h+5/jj bB4YWbEJ87gOTVQDueRtYOjzOxcRKCGd99ATT0H3U9UPi5Hz2fUE6LJO9 uMdVxscTqtkmpzRXafPvWKoiEZQcKw43VtLYQhH8VXa3R18Xi+n9kn7Dz 0sO5p7IJndkH8WjkJPNBAYz/60ZBMjVokhpzOfR6Xbw2ZdB1dkWCd+Xjg i+Z515Zz56T/bfDxjmsmq+ayuynOxkg3Jy0tUw0AHpNBSOyEvxavh86+K taypGzJzpP7yQMWzONHvVNInx+ZYGvzHKUso5+K82aLoHP+14/3EwOftd Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10512"; a="334552548" X-IronPort-AV: E=Sophos;i="5.95,214,1661842800"; d="scan'208";a="334552548" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2022 05:45:25 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10512"; a="609938092" X-IronPort-AV: E=Sophos;i="5.95,214,1661842800"; d="scan'208";a="609938092" Received: from blu2-mobl3.ccr.corp.intel.com (HELO [10.254.213.188]) ([10.254.213.188]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Oct 2022 05:45:17 -0700 Message-ID: <2bcba1f1-e142-a752-eae5-69249f5a1021@linux.intel.com> Date: Wed, 26 Oct 2022 20:45:15 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Cc: baolu.lu@linux.intel.com, Alex Williamson , Chaitanya Kulkarni , Cornelia Huck , Daniel Jordan , David Gibson , Eric Auger , Eric Farman , Jason Wang , Jean-Philippe Brucker , Joao Martins , kvm@vger.kernel.org, Matthew Rosato , "Michael S. Tsirkin" , Nicolin Chen , Niklas Schnelle , Shameerali Kolothum Thodi , Yi Liu , Keqian Zhu Subject: Re: [PATCH v3 01/15] iommu: Add IOMMU_CAP_ENFORCE_CACHE_COHERENCY Content-Language: en-US To: Jason Gunthorpe , bpf@vger.kernel.org, Jonathan Corbet , David Woodhouse , iommu@lists.linux.dev, Joerg Roedel , Kevin Tian , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor , Nick Desaulniers , Miguel Ojeda , Robin Murphy , Shuah Khan , Suravee Suthikulpanit , Tom Rix , Will Deacon References: <1-v3-402a7d6459de+24b-iommufd_jgg@nvidia.com> From: Baolu Lu In-Reply-To: <1-v3-402a7d6459de+24b-iommufd_jgg@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On 2022/10/26 2:12, Jason Gunthorpe wrote: > This queries if a domain linked to a device should expect to support > enforce_cache_coherency() so iommufd can negotiate the rules for when a > domain should be shared or not. > > For iommufd a device that declares IOMMU_CAP_ENFORCE_CACHE_COHERENCY will > not be attached to a domain that does not support it. > > Signed-off-by: Jason Gunthorpe Reviewed-by: Lu Baolu Best regards, baolu