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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 C265CC2D0A3 for ; Tue, 3 Nov 2020 10:22:04 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 4B93D206F1 for ; Tue, 3 Nov 2020 10:22:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B93D206F1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.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 silver.osuosl.org (Postfix) with ESMTP id D6EEC20356; Tue, 3 Nov 2020 10:22:03 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0EIe8Yj5kvrG; Tue, 3 Nov 2020 10:22:01 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 9F4C020029; Tue, 3 Nov 2020 10:22:01 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8243DC0889; Tue, 3 Nov 2020 10:22:01 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id C2382C0051 for ; Tue, 3 Nov 2020 10:21:59 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id B07E887149 for ; Tue, 3 Nov 2020 10:21:59 +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 lkxjRRxBTFN9 for ; Tue, 3 Nov 2020 10:21:58 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by hemlock.osuosl.org (Postfix) with ESMTP id 6B0E58713F for ; Tue, 3 Nov 2020 10:21:58 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C78E2139F; Tue, 3 Nov 2020 02:21:57 -0800 (PST) Received: from [10.57.54.223] (unknown [10.57.54.223]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B00D53F66E; Tue, 3 Nov 2020 02:21:56 -0800 (PST) Subject: Re: Some questions about arm_lpae_install_table To: Will Deacon , Kunkun Jiang References: <6778678e-df81-f7e2-235d-6390ff6384ac@huawei.com> <20201103091130.GA4403@willie-the-truck> From: Robin Murphy Message-ID: Date: Tue, 3 Nov 2020 10:21:55 +0000 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201103091130.GA4403@willie-the-truck> Content-Language: en-GB Cc: wanghaibin.wang@huawei.com, iommu@lists.linux-foundation.org, zhukeqian1@huawei.com 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" T24gMjAyMC0xMS0wMyAwOToxMSwgV2lsbCBEZWFjb24gd3JvdGU6Cj4gT24gVHVlLCBOb3YgMDMs IDIwMjAgYXQgMTE6MDA6MjdBTSArMDgwMCwgS3Vua3VuIEppYW5nIHdyb3RlOgo+PiBSZWNlbnRs eSwgSSBoYXZlIHJlYWQgYW5kIGxlYXJuZWQgdGhlIGNvZGUgcmVsYXRlZCB0byBpby1wZ3RhYmxl LWFybS5jLgo+PiBUaGVyZQo+PiBhcmUgdHdvIHF1ZXN0aW9uIG9uIGFybV9scGFlX2luc3RhbGxf dGFibGUuCj4+Cj4+IDHjgIF0aGUgZmlyc3QKPj4KPj4+IHN0YXRpYyBhcm1fbHBhZV9pb3B0ZSBh cm1fbHBhZV9pbnN0YWxsX3RhYmxlKGFybV9scGFlX2lvcHRlICp0YWJsZSwKPj4+ICDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGFybV9scGFlX2lvcHRlICpwdGVwLAo+Pj4gIMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgYXJtX2xwYWVfaW9wdGUgY3VyciwKPj4+ICDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHN0cnVjdCBpb19wZ3RhYmxlX2NmZyAqY2ZnKQo+ Pj4gewo+Pj4gIMKgwqDCoMKgwqDCoMKgIGFybV9scGFlX2lvcHRlIG9sZCwgbmV3Owo+Pj4KPj4+ ICDCoMKgwqDCoMKgwqDCoCBuZXcgPSBfX3BhKHRhYmxlKSB8IEFSTV9MUEFFX1BURV9UWVBFX1RB QkxFOwo+Pj4gIMKgwqDCoMKgwqDCoMKgIGlmIChjZmctPnF1aXJrcyAmIElPX1BHVEFCTEVfUVVJ UktfQVJNX05TKQo+Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBuZXcgfD0gQVJN X0xQQUVfUFRFX05TVEFCTEU7Cj4+Pgo+Pj4gIMKgwqDCoMKgwqDCoCAvKgo+Pj4gIMKgwqDCoMKg wqDCoMKgwqAgKiBFbnN1cmUgdGhlIHRhYmxlIGl0c2VsZiBpcyB2aXNpYmxlIGJlZm9yZSBpdHMg UFRFIGNhbiBiZS4KPj4+ICDCoMKgwqDCoMKgwqDCoMKgICogV2hpbHN0IHdlIGNvdWxkIGdldCBh d2F5IHdpdGggY21weGNoZzY0X3JlbGVhc2UgYmVsb3csIHRoaXMKPj4+ICDCoMKgwqDCoMKgwqDC oMKgICogZG9lc24ndCBoYXZlIGFueSBvcmRlcmluZyBzZW1hbnRpY3Mgd2hlbiAhQ09ORklHX1NN UC4KPj4+ICDCoMKgwqDCoMKgwqDCoMKgICovCj4+PiAgwqDCoMKgwqDCoMKgwqAgZG1hX3dtYigp Owo+Pj4KPj4+ICDCoMKgwqDCoMKgwqDCoCBvbGQgPSBjbXB4Y2hnNjRfcmVsYXhlZChwdGVwLCBj dXJyLCBuZXcpOwo+Pj4KPj4+ICDCoMKgwqDCoMKgwqDCoCBpZiAoY2ZnLT5jb2hlcmVudF93YWxr IHx8IChvbGQgJiBBUk1fTFBBRV9QVEVfU1dfU1lOQykpCj4+PiAgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgIHJldHVybiBvbGQ7Cj4+Pgo+Pj4gIMKgwqDCoMKgwqDCoMKgIC8qIEV2ZW4g aWYgaXQncyBub3Qgb3VycywgdGhlcmUncyBubyBwb2ludCB3YWl0aW5nOyBqdXN0IGtpY2sgaXQK Pj4+ICovCj4+PiAgwqDCoMKgwqDCoMKgwqAgX19hcm1fbHBhZV9zeW5jX3B0ZShwdGVwLCBjZmcp Owo+Pj4gIMKgwqDCoMKgwqDCoMKgIGlmIChvbGQgPT0gY3VycikKPj4+ICDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqAgV1JJVEVfT05DRSgqcHRlcCwgbmV3IHwgQVJNX0xQQUVfUFRFX1NX X1NZTkMpOwo+Pj4KPj4+ICDCoMKgwqDCoMKgwqDCoCByZXR1cm4gb2xkOwo+Pj4gfQo+Pgo+PiBJ ZiBhbm90aGVyIHRocmVhZCBjaGFuZ2VzIHRoZSBwdGVwIGJldHdlZW4gY21weGNoZzY0X3JlbGF4 ZWQgYW5kCj4+IFdSSVRFX09OQ0UoKnB0ZXAsIG5ldyB8IEFSTV9MUEFFX1BURV9TV19TWU5DKSwg dGhlIG9wZXJhdGlvbgo+PiBXUklURV9PTkNFIHdpbGwgb3ZlcndyaXRlIHRoZSBjaGFuZ2UuCj4g Cj4gQ2FuIHlvdSBwbGVhc2UgcHJvdmlkZSBhbiBleGFtcGxlIG9mIGEgY29kZSBwYXRoIHdoZXJl IHRoaXMgaGFwcGVucz8gVGhlCj4gaWRlYSBpcyB0aGF0IENQVXMgY2FuIHJhY2Ugb24gdGhlIGNt cHhjaGcoKSwgYnV0IHRoZXJlIHdpbGwgb25seSBiZSBvbmUKPiB3aW5uZXIuCgpUaGUgb25seSB3 YXkgYSB0YWJsZSBlbnRyeSBjYW4gc3VkZGVubHkgZGlzYXBwZWFyIGlzIGluIGEgcmFjZSB0aGF0 IAppbnZvbHZlcyBtYXBwaW5nIG9yIHVubWFwcGluZyBhIHdob2xlIGJsb2NrL3RhYmxlLXNpemVk IHJlZ2lvbiwgd2hpbGUgCnNpbXVsdGFuZW91c2x5IG1hcHBpbmcgYSBwYWdlICp3aXRoaW4qIHRo YXQgcmVnaW9uLiBZZXMsIGlmIHNvbWVvbmUgdXNlcyAKdGhlIEFQSSBpbiBhIG5vbnNlbnNpY2Fs IGFuZCBjb21wbGV0ZWx5IGludmFsaWQgd2F5IHRoYXQgY2Fubm90IGhhdmUgYSAKcHJlZGljdGFi bGUgb3V0Y29tZSwgdGhleSBnZXQgYW4gdW5wcmVkaWN0YWJsZSBvdXRjb21lLiBXaG9vcCBkZSBk by4uLgoKPj4gMuOAgXRoZSBzZWNvbmQKPj4KPj4+IGZvciAoaSA9IDA7IGkgPCB0YWJsZXN6IC8g c2l6ZW9mKHB0ZSk7IGkrKywgYmxrX3BhZGRyICs9IHNwbGl0X3N6KSB7Cj4+PiAgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgIC8qIFVubWFwISAqLwo+Pj4gIMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoCBpZiAoaSA9PSB1bm1hcF9pZHgpCj4+PiBjb250aW51ZTsKPj4+Cj4+PiAg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIF9fYXJtX2xwYWVfaW5pdF9wdGUoZGF0YSwg YmxrX3BhZGRyLCBwdGUsIGx2bCwKPj4+ICZ0YWJsZXBbaV0pOwo+Pj4gfQo+Pj4KPj4+IHB0ZSA9 IGFybV9scGFlX2luc3RhbGxfdGFibGUodGFibGVwLCBwdGVwLCBibGtfcHRlLCBjZmcpOwo+Pgo+ PiBXaGVuIGFsdGVyaW5nIGEgdHJhbnNsYXRpb24gdGFibGUgZGVzY3JpcHRvciBpbmNsdWRlIHNw bGl0IGEgYmxvY2sgaW50bwo+PiBjb25zdGl0dWVudCBncmFudWxlcywgdGhlIEFybXY4LUEgYW5k IFNNTVV2MyBhcmNoaXRlY3R1cmVzIHJlcXVpcmUKPj4gYSBicmVhay1iZWZvcmUtbWFrZSBwcm9j ZWR1cmUuIEJ1dCBpbiB0aGUgZnVuY3Rpb24gYXJtX2xwYWVfc3BsaXRfYmxrX3VubWFwLAo+PiBp dCBjaGFuZ2VzIGEgYmxvY2sgZGVzY3JpcHRvciB0byBhbiBlcXVpdmFsZW50IHNwYW4gb2YgcGFn ZSB0cmFuc2xhdGlvbnMKPj4gZGlyZWN0bHkuIElzIGl0IGFwcHJvcHJpYXRlIHRvIGRvIHNvPwo+ IAo+IEJyZWFrLWJlZm9yZS1tYWtlIGRvZXNuJ3QgcmVhbGx5IHdvcmsgZm9yIHRoZSBTTU1VIGJl Y2F1c2UgZmF1bHRzIGFyZQo+IGdlbmVyYWxseSBmYXRhbC4KPiAKPiBBcmUgeW91IHNlZWluZyBw cm9ibGVtcyBpbiBwcmFjdGljZSB3aXRoIHRoaXMgY29kZT8KClRCSCBJIGRvIHN0aWxsIHdvbmRl ciBpZiB3ZSBzaG91bGRuJ3QganVzdCBnZXQgcmlkIG9mIHNwbGl0X2Jsa191bm1hcCAKYW5kIGFs bCBpdHMgY29tcGxleGl0eS4gT3RoZXIgZHJpdmVycyB0cmVhdCBhbiB1bm1hcCBvZiBhIHBhZ2Ug ZnJvbSBhIApibG9jayBlbnRyeSBhcyBzaW1wbHkgdW5tYXBwaW5nIHRoZSB3aG9sZSBibG9jaywg YW5kIHRoYXQncyB0aGUgCmJlaGF2aW91ciBWRklPIHNlZW1zIHRvIGV4cGVjdC4gTXkgb25seSB3 b3JyeSBpcyB0aGF0IGl0J3MgYmVlbiBhcm91bmQgCmxvbmcgZW5vdWdoIHRoYXQgdGhlcmUgbWln aHQgYmUgc29tZSBob3JyaWJsZSBvdXQtb2YtdHJlZSBjb2RlIHRoYXQgKmlzKiAKcmVseWluZyBv biBpdCwgZGVzcGl0ZSB0aGUgZmFjdCB0aGF0IGl0J3MgaW1wb3NzaWJsZSB0byBpbXBsZW1lbnQg aW4gYSAKd2F5IHRoYXQncyBkZWZpbml0ZWx5IDEwMCUgc2FmZSA6LwoKUm9iaW4uCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlz dAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91 bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==