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Wed, 22 Jan 2020 05:40:59 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tukJiY4dLvjV for ; Wed, 22 Jan 2020 05:40:58 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by hemlock.osuosl.org (Postfix) with ESMTPS id A90E087AB5 for ; Wed, 22 Jan 2020 05:40:58 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Jan 2020 21:40:57 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,348,1574150400"; d="scan'208";a="215791760" Received: from allen-box.sh.intel.com (HELO [10.239.159.138]) ([10.239.159.138]) by orsmga007.jf.intel.com with ESMTP; 21 Jan 2020 21:40:55 -0800 Subject: Re: [RFC PATCH 3/4] iommu: Preallocate iommu group when probing devices To: Robin Murphy , Joerg Roedel References: <20200101052648.14295-1-baolu.lu@linux.intel.com> <20200101052648.14295-4-baolu.lu@linux.intel.com> <20200117102151.GF15760@8bytes.org> <25e2e7fa-487c-f951-4b2c-27bac5e30815@linux.intel.com> From: Lu Baolu Message-ID: Date: Wed, 22 Jan 2020 13:39:26 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: kevin.tian@intel.com, ashok.raj@intel.com, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jacob.jun.pan@intel.com, Bjorn Helgaas , Christoph Hellwig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" SGkgUm9iaW4sCgpPbiAxLzIxLzIwIDg6NDUgUE0sIFJvYmluIE11cnBoeSB3cm90ZToKPiBPbiAx OS8wMS8yMDIwIDY6MjkgYW0sIEx1IEJhb2x1IHdyb3RlOgo+PiBIaSBKb2VyZywKPj4KPj4gT24g MS8xNy8yMCA2OjIxIFBNLCBKb2VyZyBSb2VkZWwgd3JvdGU6Cj4+PiBPbiBXZWQsIEphbiAwMSwg MjAyMCBhdCAwMToyNjo0N1BNICswODAwLCBMdSBCYW9sdSB3cm90ZToKPj4+PiBUaGlzIHNwbGl0 cyBpb21tdSBncm91cCBhbGxvY2F0aW9uIGZyb20gYWRkaW5nIGRldmljZXMuIFRoaXMgbWFrZXMK Pj4+PiBpdCBwb3NzaWJsZSB0byBkZXRlcm1pbmUgdGhlIGRlZmF1bHQgZG9tYWluIHR5cGUgZm9y IGVhY2ggZ3JvdXAgYXMKPj4+PiBhbGwgZGV2aWNlcyBiZWxvbmdpbmcgdG8gdGhlIGdyb3VwIGhh dmUgYmVlbiBkZXRlcm1pbmVkLgo+Pj4KPj4+IEkgdGhpbmsgaXRzIGJldHRlciB0byBrZWVwIGdy b3VwIGFsbG9jYXRpb24gYXMgaXQgaXMgYW5kIGp1c3QgZGVmZXIKPj4+IGRlZmF1bHQgZG9tYWlu IGFsbG9jYXRpb24gYWZ0ZXIgZWFjaCBkZXZpY2UgaXMgaW4gaXRzIGdyb3VwLiBCdXQgdGFrZQo+ Pgo+PiBJIHRyaWVkIGRlZmVyaW5nIGRlZmF1bHQgZG9tYWluIGFsbG9jYXRpb24sIGJ1dCBpdCBz ZWVtcyBub3QgcG9zc2libGUuCj4+Cj4+IFRoZSBjYWxsIHBhdGggb2YgYWRkaW5nIGRldmljZXMg aW50byB0aGVpciBncm91cHM6Cj4+Cj4+IGlvbW11X3Byb2JlX2RldmljZQo+PiAtPiBvcHMtPmFk ZF9kZXZpY2UoZGV2KQo+PiDCoMKgwqAgLT4gKGlvbW11IHZlbmRvciBkcml2ZXIpIGlvbW11X2dy b3VwX2dldF9mb3JfZGV2KGRldikKPj4KPj4gQWZ0ZXIgZG9pbmcgdGhpcywgdGhlIHZlbmRvciBk cml2ZXIgd2lsbCBnZXQgdGhlIGRlZmF1bHQgZG9tYWluIGFuZAo+PiBhcHBseSBkbWFfb3BzIGFj Y29yZGluZyB0byB0aGUgZG9tYWluIHR5cGUuIElmIHdlIGRlZmVyIHRoZSBkb21haW4KPj4gYWxs b2NhdGlvbiwgdGhleSB3aWxsIGdldCBhIE5VTEwgZGVmYXVsdCBkb21haW4gYW5kIGNhdXNlIHBh bmljIGluCj4+IHRoZSB2ZW5kb3IgZHJpdmVyLgo+Pgo+PiBBbnkgc3VnZ2VzdGlvbnM/Cj4gCj4g aHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbGludXgtaW9tbXUvNmRiYmZjMTAtMzI0Ny03NDRjLWFl OGQtNDQzYTMzNmUwYzUwQGxpbnV4LmludGVsLmNvbS8gCj4gCj4gCj4gSGF2ZW4ndCB3ZSBiZWVu IGhlcmUgYmVmb3JlPyA7KQo+IAo+IFNpbmNlIHdlIGNhbid0IChzYWZlbHkgb3IgcmVhc29uYWJs eSkgY2hhbmdlIGEgZ3JvdXAncyBkZWZhdWx0IGRvbWFpbiAKPiBhZnRlciBvcHMtPmFkZF9kZXZp Y2UoKSBoYXMgcmV0dXJuZWQsIGFuZCBpbiBnZW5lcmFsIGl0IGdldHMgaW1wcmFjdGljYWwgCj4g dG8gZXZhbHVhdGUgImFsbCBkZXZpY2UgaW4gYSBncm91cCIgb25jZSB5b3UgbG9vayBiZXlvbmQg JnBjaV9idXNfdHlwZSAKPiAob3IgY29uc2lkZXIgaG90cGx1ZyBhcyBtZW50aW9uZWQpLCB0aGVu IEFGQUlDUyB0aGVyZSdzIG5vIHJlYXNvbmFibGUgCj4gd2F5IHRvIGdldCBhd2F5IGZyb20gdGhl IGRlZmF1bHQgZG9tYWluIHR5cGUgYmVpbmcgZGVmaW5lZCBieSB0aGUgZmlyc3QgCj4gZGV2aWNl IHRvIGF0dGFjaC4KClllcywgYWdyZWVkLgoKPiBCdXQgaW4gcHJhY3RpY2UgaXQncyBoYXJkbHkg YSBwcm9ibGVtIGFueXdheSAtIGlmIAo+IGV2ZXJ5IGRldmljZSBpbiBhIGdpdmVuIGdyb3VwIHJl cXVlc3RzIHRoZSBzYW1lIGRvbWFpbiB0eXBlIHRoZW4gaXQgCj4gZG9lc24ndCBtYXR0ZXIgd2hp Y2ggY29tZXMgZmlyc3QsIGFuZCBpZiB0aGV5IGRvbid0IHRoZW4gd2UgdWx0aW1hdGVseSAKPiBl bmQgdXAgd2l0aCBhbiBpbXBvc3NpYmxlIHNldCBvZiBjb25zdHJhaW50cywgc28gYXJlIGRvb21l ZCB0byBkbyB0aGUgCj4gJ3dyb25nJyB0aGluZyByZWdhcmRsZXNzLgoKVGhlIHRoaXJkIGNhc2Ug aXMsIGZvciBleGFtcGxlLCB0aHJlZSBkZXZpY2VzIEEsIEIsIEMgaW4gYSBncm91cC4gVGhlCmZp cnN0IGRldmljZSBBIGlzIG5ldXRyYWwgYWJvdXQgd2hpY2ggdHlwZSBvZiBkZWZhdWx0IGRvbWFp biB0eXBlIGlzCnVzZWQuIFNvIHRoZSBpb21tdSBmcmFtZXdvcmsgd2lsbCB1c2UgYSBzdGF0aWMg ZGVmYXVsdCBkb21haW4uIEJ1dCB0aGUKZGV2aWNlIEIgcmVxdWlyZXMgdG8gdXNlIGEgc3BlY2lm aWMgb25lIHdoaWNoIGlzIGRpZmZlcmVudCBmcm9tIHRoZQpkZWZhdWx0LiBDdXJyZW50bHksIHRo aXMgaXMgaGFuZGxlZCBpbiB0aGUgdmVuZG9yIGlvbW11IGRyaXZlciBhbmQgb25lCm1vdGl2YXRp b24gb2YgdGhpcyBwYXRjaCBzZXQgaXMgdG8gaGFuZGxlIHRoaXMgaW4gdGhlIGdlbmVyaWMgbGF5 ZXIuCgo+IAo+IFRodXMgdW5sZXNzIGFueW9uZSB3YW50cyB0byBzdGFydCByZWRlZmluaW5nIHRo ZSB3aG9sZSBncm91cCBjb25jZXB0IHRvIAo+IHNlcGFyYXRlIHRoZSBub3Rpb25zIG9mIElEIGFs aWFzaW5nIGFuZCBwZWVyLXRvLXBlZXIgaXNvbGF0aW9uICh3aGljaCAKPiBzdGlsbCB3b3VsZG4n dCBuZWNlc3NhcmlseSBoZWxwKSwgSSB0aGluayB0aGlzIHVzZXIgb3ZlcnJpZGUgZWZmZWN0aXZl bHkgCj4gYm9pbHMgZG93biB0byBqdXN0IGFub3RoZXIgZmxhdm91ciBvZiBpb21tdV9yZXF1ZXN0 XypfZm9yX2RldigpLCBhbmQgYXMgCj4gc3VjaCBjb21lcyByaWdodCBiYWNrIHRvIHRoZSAianVz dCBwYXNzIHRoZSBibG9vZHkgZGV2aWNlIHRvIAo+IG9wcy0+ZG9tYWluX2FsbG9jKCkgYW5kIHJl c29sdmUgZXZlcnl0aGluZyB1cC1mcm9udCIgYXJndW1lbnQuCj4gCj4gUm9iaW4uCgpCZXN0IHJl Z2FyZHMsCmJhb2x1Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpo dHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==