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 X-Spam-Level: X-Spam-Status: No, score=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE4E2C433DB for ; Tue, 5 Jan 2021 03:55:31 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 95B0B22597 for ; Tue, 5 Jan 2021 03:55:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 95B0B22597 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 37CB28689D; Tue, 5 Jan 2021 03:55:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rJTuO-ShUmVH; Tue, 5 Jan 2021 03:55:29 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 301308686B; Tue, 5 Jan 2021 03:55:29 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1229AC088B; Tue, 5 Jan 2021 03:55:29 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id B7DD6C013A for ; Tue, 5 Jan 2021 03:55:27 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 9F15A8686B for ; Tue, 5 Jan 2021 03:55:27 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jqyP5ul+0CS4 for ; Tue, 5 Jan 2021 03:55:26 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by whitealder.osuosl.org (Postfix) with ESMTPS id 87EB58689B for ; Tue, 5 Jan 2021 03:55:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1609818924; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ij2Q4K/HNjjCnEbhR5nYkOPgqdZ08oveYJIO3xHvf3w=; b=H2A23f4WnzT0hdy5NTaUTETQvQRK7/9PdUMYSoDvBGiTFbgYd11pQnk64450DHbMeDqhr1 wySu7/rP6tLoAIeTwqPafQNNGWgpqKN0KCUPPLVBdti0ZwNh6hW6kbFlvlQ1vU/I6YLpsE BSooP200mNkWrrvJRvw3HGmgX6bYvBA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-24-Bh_QOVzBNd2_C-beX7WtwA-1; Mon, 04 Jan 2021 22:55:20 -0500 X-MC-Unique: Bh_QOVzBNd2_C-beX7WtwA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8DBE0800D62; Tue, 5 Jan 2021 03:55:19 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-214.pek2.redhat.com [10.72.12.214]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 056981002382; Tue, 5 Jan 2021 03:55:16 +0000 (UTC) Subject: Re: [PATCH] iommu: check for the deferred attach when attaching a device From: lijiang To: linux-kernel@vger.kernel.org References: <20201226053959.4222-1-lijiang@redhat.com> Message-ID: <33b6f925-71e6-5d9e-74c3-3e1eaf13398e@redhat.com> Date: Tue, 5 Jan 2021 11:55:09 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20201226053959.4222-1-lijiang@redhat.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Cc: jroedel@suse.de, will@kernel.org, iommu@lists.linux-foundation.org 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" SGksCgpBbHNvIGFkZCBKb2VyZyB0byBjYyBsaXN0LgoKVGhhbmtzLgpMaWFuYm8K5ZyoIDIwMjDl ubQxMuaciDI25pelIDEzOjM5LCBMaWFuYm8gSmlhbmcg5YaZ6YGTOgo+IEN1cnJlbnRseSwgYmVj YXVzZSBkb21haW4gYXR0YWNoIGFsbG93cyB0byBiZSBkZWZlcnJlZCBmcm9tIGlvbW11Cj4gZHJp dmVyIHRvIGRldmljZSBkcml2ZXIsIGFuZCB3aGVuIGlvbW11IGluaXRpYWxpemVzLCB0aGUgZGV2 aWNlcwo+IG9uIHRoZSBidXMgd2lsbCBiZSBzY2FubmVkIGFuZCB0aGUgZGVmYXVsdCBncm91cHMg d2lsbCBiZSBhbGxvY2F0ZWQuCj4gCj4gRHVlIHRvIHRoZSBhYm92ZSBjaGFuZ2VzLCBzb21lIGRl dmljZXMgY291bGQgYmUgYWRkZWQgdG8gdGhlIHNhbWUKPiBncm91cCBhcyBiZWxvdzoKPiAKPiBb ICAgIDMuODU5NDE3XSBwY2kgMDAwMDowMTowMC4wOiBBZGRpbmcgdG8gaW9tbXUgZ3JvdXAgMTYK PiBbICAgIDMuODY0NTcyXSBwY2kgMDAwMDowMTowMC4xOiBBZGRpbmcgdG8gaW9tbXUgZ3JvdXAg MTYKPiBbICAgIDMuODY5NzM4XSBwY2kgMDAwMDowMjowMC4wOiBBZGRpbmcgdG8gaW9tbXUgZ3Jv dXAgMTcKPiBbICAgIDMuODc0ODkyXSBwY2kgMDAwMDowMjowMC4xOiBBZGRpbmcgdG8gaW9tbXUg Z3JvdXAgMTcKPiAKPiBCdXQgd2hlbiBhdHRhY2hpbmcgdGhlc2UgZGV2aWNlcywgaXQgZG9lc24n dCBhbGxvdyB0aGF0IGEgZ3JvdXAgaGFzCj4gbW9yZSB0aGFuIG9uZSBkZXZpY2UsIG90aGVyd2lz ZSBpdCB3aWxsIHJldHVybiBhbiBlcnJvci4gVGhpcyBjb25mbGljdHMKPiB3aXRoIHRoZSBkZWZl cnJlZCBhdHRhY2hpbmcuIFVuZm9ydHVuYXRlbHksIGl0IGhhcyB0d28gZGV2aWNlcyBpbiB0aGUK PiBzYW1lIGdyb3VwIGZvciBteSBzaWRlLCBmb3IgZXhhbXBsZToKPiAKPiBbICAgIDkuNjI3MDE0 XSBpb21tdV9ncm91cF9kZXZpY2VfY291bnQoKTogZGV2aWNlIG5hbWVbMF06MDAwMDowMTowMC4w Cj4gWyAgICA5LjYzMzU0NV0gaW9tbXVfZ3JvdXBfZGV2aWNlX2NvdW50KCk6IGRldmljZSBuYW1l WzFdOjAwMDA6MDE6MDAuMQo+IC4uLgo+IFsgICAxMC4yNTU2MDldIGlvbW11X2dyb3VwX2Rldmlj ZV9jb3VudCgpOiBkZXZpY2UgbmFtZVswXTowMDAwOjAyOjAwLjAKPiBbICAgMTAuMjYyMTQ0XSBp b21tdV9ncm91cF9kZXZpY2VfY291bnQoKTogZGV2aWNlIG5hbWVbMV06MDAwMDowMjowMC4xCj4g Cj4gRmluYWxseSwgd2hpY2ggY2F1c2VkIHRoZSBmYWlsdXJlIG9mIHRnMyBkcml2ZXIgd2hlbiB0 ZzMgZHJpdmVyIGNhbGxzCj4gdGhlIGRtYV9hbGxvY19jb2hlcmVudCgpIHRvIGFsbG9jYXRlIGNv aGVyZW50IG1lbW9yeSBpbiB0aGUgdGczX3Rlc3RfZG1hKCkuCj4gCj4gWyAgICA5LjY2MDMxMF0g dGczIDAwMDA6MDE6MDAuMDogRE1BIGVuZ2luZSB0ZXN0IGZhaWxlZCwgYWJvcnRpbmcKPiBbICAg IDkuNzU0MDg1XSB0ZzM6IHByb2JlIG9mIDAwMDA6MDE6MDAuMCBmYWlsZWQgd2l0aCBlcnJvciAt MTIKPiBbICAgIDkuOTk3NTEyXSB0ZzMgMDAwMDowMTowMC4xOiBETUEgZW5naW5lIHRlc3QgZmFp bGVkLCBhYm9ydGluZwo+IFsgICAxMC4wNDMwNTNdIHRnMzogcHJvYmUgb2YgMDAwMDowMTowMC4x IGZhaWxlZCB3aXRoIGVycm9yIC0xMgo+IFsgICAxMC4yODg5MDVdIHRnMyAwMDAwOjAyOjAwLjA6 IERNQSBlbmdpbmUgdGVzdCBmYWlsZWQsIGFib3J0aW5nCj4gWyAgIDEwLjMzNDA3MF0gdGczOiBw cm9iZSBvZiAwMDAwOjAyOjAwLjAgZmFpbGVkIHdpdGggZXJyb3IgLTEyCj4gWyAgIDEwLjU3ODMw M10gdGczIDAwMDA6MDI6MDAuMTogRE1BIGVuZ2luZSB0ZXN0IGZhaWxlZCwgYWJvcnRpbmcKPiBb ICAgMTAuNjIyNjI5XSB0ZzM6IHByb2JlIG9mIDAwMDA6MDI6MDAuMSBmYWlsZWQgd2l0aCBlcnJv ciAtMTIKPiAKPiBJbiBhZGRpdGlvbiwgdGhlIHNpbWlsYXIgc2l0dWF0aW9ucyBhbHNvIG9jY3Vy IGluIG90aGVyIGRyaXZlcnMgc3VjaAo+IGFzIHRoZSBibnh0X2VuIGRyaXZlci4gVGhhdCBjYW4g YmUgcmVwcm9kdWNlZCBlYXNpbHkgaW4ga2R1bXAga2VybmVsCj4gd2hlbiBTTUUgaXMgYWN0aXZl Lgo+IAo+IEFkZCBhIGNoZWNrIGZvciB0aGUgZGVmZXJyZWQgYXR0YWNoIGluIHRoZSBpb21tdV9h dHRhY2hfZGV2aWNlKCkgYW5kCj4gYWxsb3cgdG8gYXR0YWNoIHRoZSBkZWZlcnJlZCBkZXZpY2Ug cmVnYXJkbGVzcyBvZiBob3cgbWFueSBkZXZpY2VzCj4gYXJlIGluIGEgZ3JvdXAuCj4gCj4gU2ln bmVkLW9mZi1ieTogTGlhbmJvIEppYW5nIDxsaWppYW5nQHJlZGhhdC5jb20+Cj4gLS0tCj4gIGRy aXZlcnMvaW9tbXUvaW9tbXUuYyB8IDUgKysrKy0KPiAgMSBmaWxlIGNoYW5nZWQsIDQgaW5zZXJ0 aW9ucygrKSwgMSBkZWxldGlvbigtKQo+IAo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2lvbW11L2lv bW11LmMgYi9kcml2ZXJzL2lvbW11L2lvbW11LmMKPiBpbmRleCBmZmVlYmRhOGQ2ZGUuLmRjY2Fi N2IxMzNmYiAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL2lvbW11L2lvbW11LmMKPiArKysgYi9kcml2 ZXJzL2lvbW11L2lvbW11LmMKPiBAQCAtMTk2Nyw4ICsxOTY3LDExIEBAIGludCBpb21tdV9hdHRh Y2hfZGV2aWNlKHN0cnVjdCBpb21tdV9kb21haW4gKmRvbWFpbiwgc3RydWN0IGRldmljZSAqZGV2 KQo+ICAJICovCj4gIAltdXRleF9sb2NrKCZncm91cC0+bXV0ZXgpOwo+ICAJcmV0ID0gLUVJTlZB TDsKPiAtCWlmIChpb21tdV9ncm91cF9kZXZpY2VfY291bnQoZ3JvdXApICE9IDEpCj4gKwlpZiAo IWlvbW11X2lzX2F0dGFjaF9kZWZlcnJlZChkb21haW4sIGRldikgJiYKPiArCSAgICBpb21tdV9n cm91cF9kZXZpY2VfY291bnQoZ3JvdXApICE9IDEpIHsKPiArCQlkZXZfZXJyX3JhdGVsaW1pdGVk KGRldiwgIkdyb3VwIGhhcyBtb3JlIHRoYW4gb25lIGRldmljZVxuIik7Cj4gIAkJZ290byBvdXRf dW5sb2NrOwo+ICsJfQo+ICAKPiAgCXJldCA9IF9faW9tbXVfYXR0YWNoX2dyb3VwKGRvbWFpbiwg Z3JvdXApOwo+ICAKPiAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9y ZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21t dQ==