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 smtp3.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 smtp.lore.kernel.org (Postfix) with ESMTPS id 71DA2C433EF for ; Tue, 12 Apr 2022 13:41:23 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 1EB5860A93; Tue, 12 Apr 2022 13:41:23 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id b9GEpVpSovqY; Tue, 12 Apr 2022 13:41:22 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTPS id 0061C6103A; Tue, 12 Apr 2022 13:41:21 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id BC4B9C002F; Tue, 12 Apr 2022 13:41:21 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137]) by lists.linuxfoundation.org (Postfix) with ESMTP id C0C63C002C for ; Tue, 12 Apr 2022 13:41:20 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 9F61E40353 for ; Tue, 12 Apr 2022 13:41:20 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp4.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=intel.com Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NpxZvn8yBqJ6 for ; Tue, 12 Apr 2022 13:41:19 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by smtp4.osuosl.org (Postfix) with ESMTPS id 802C84032F for ; Tue, 12 Apr 2022 13:41:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649770879; x=1681306879; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=4mr0BKGyGNmXW0x7QfGTYNSu+BqJgjoRew/Y6ezcFe4=; b=A/ua4LQDANDzC+m/5NIauxLgHT7WjK0qbnbWzyQMaamx99Hd75Ohhmz4 gJHPo2RXmk5bDqXCXeVtMpFQhxoiTtFEs+rEkdYk2NVYE1LkeZigvC+mQ GL7pkKYSr6/0SgbaZUIiY9vKIStGxP9x/bVpHJeZadGaWfPTE2LKze3RN 82QAUiyErk53p86GDhL3bGorxb3DRwCa35o9sZ6lf0P95maVlBUUR5uqD 0b5xfKGHW1Zq/7g3/WvWPZgVRb3upQ++11KRV0NSn1+iudHgBVVaujza7 ShsxgyE7zqWgGmXyRlVItD/wgipGplYUysbh1MqkkU7oPG/q4U3Q76TE7 A==; X-IronPort-AV: E=McAfee;i="6400,9594,10314"; a="261814698" X-IronPort-AV: E=Sophos;i="5.90,254,1643702400"; d="scan'208";a="261814698" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2022 06:41:18 -0700 X-IronPort-AV: E=Sophos;i="5.90,254,1643702400"; d="scan'208";a="660494090" Received: from fyu1.sc.intel.com ([172.25.103.126]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Apr 2022 06:41:18 -0700 Date: Tue, 12 Apr 2022 06:41:39 -0700 From: Fenghua Yu To: "zhangfei.gao@foxmail.com" Subject: Re: [PATCH v4 05/11] iommu/sva: Assign a PASID to mm on PASID allocation and free it on mm exit Message-ID: References: <20220207230254.3342514-1-fenghua.yu@intel.com> <20220207230254.3342514-6-fenghua.yu@intel.com> <56ed509d-a7cf-1fde-676c-a28eb204989b@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Cc: Ravi V Shankar , Tony Luck , Ashok Raj , jean-philippe , Peter Zijlstra , Dave Hansen , x86 , linux-kernel , Dave Hansen , iommu , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Josh Poimboeuf , Thomas Gleixner 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" SGksIFpoYW5nZmVpLAoKT24gVHVlLCBBcHIgMTIsIDIwMjIgYXQgMDM6MDQ6MDlQTSArMDgwMCwg emhhbmdmZWkuZ2FvQGZveG1haWwuY29tIHdyb3RlOgo+IAo+IAo+IE9uIDIwMjIvNC8xMSDkuIvl jYgxMDo1MiwgRGF2ZSBIYW5zZW4gd3JvdGU6Cj4gPiBPbiA0LzExLzIyIDA3OjQ0LCB6aGFuZ2Zl aS5nYW9AZm94bWFpbC5jb20gd3JvdGU6Cj4gPiA+IE9uIDIwMjIvNC8xMSDkuIvljYgxMDozNiwg RGF2ZSBIYW5zZW4gd3JvdGU6Cj4gPiA+ID4gT24gNC8xMS8yMiAwNzoyMCwgemhhbmdmZWkuZ2Fv QGZveG1haWwuY29tIHdyb3RlOgo+ID4gPiA+ID4gPiBJcyB0aGVyZSBub3RoaW5nIGJlZm9yZSB0 aGlzIGNhbGwgdHJhY2U/wqAgVXN1YWxseSB0aGVyZSB3aWxsIGJlIGF0IGxlYXN0Cj4gPiA+ID4g PiA+IHNvbWUgd2FybmluZyB0ZXh0Lgo+ID4gPiA+ID4gSSBhZGRlZCBkdW1wX3N0YWNrKCkgaW4g aW9hc2lkX2ZyZWUuCj4gPiA+ID4gSG9sZCBvbiBhIHNlYywgdGhvdWdoLi4uCj4gPiA+ID4gCj4g PiA+ID4gV2hhdCdzIHRoZSAqcHJvYmxlbSogaGVyZT/CoCBEaWQgc29tZXRoaW5nIGJyZWFrIG9y IGFyZSB5b3UganVzdCBzYXlpbmcKPiA+ID4gPiB0aGF0IHNvbWV0aGluZyBsb29rcyB3ZWlyZCB0 byBfeW91Xz8KPiA+ID4gQWZ0ZXIgdGhpcywgbmdpbnggaXMgbm90IHdvcmtpbmcgYXQgYWxsLCBh bmQgaGFyZHdhcmUgcmVwb3J0cyBlcnJvci4KPiA+ID4gU3VwcG9zZSB0aGUgdGhlIG1hc3RlciB1 c2UgdGhlIGlvYXNpZCBmb3IgaW5pdCwgYnV0IGdvdCBmcmVlZC4KPiA+ID4gCj4gPiA+IGhhcmR3 YXJlIHJlcG9ydHM6Cj4gPiA+IFvCoCAxNTIuNzMxODY5XSBoaXNpX3NlYzIgMDAwMDo3NjowMC4w OiBxbV9hY2NfZG9fdGFza190aW1lb3V0IFtlcnJvciBzdGF0dXM9MHgyMF0gZm91bmQKPiA+ID4g W8KgIDE1Mi43Mzk2NTddIGhpc2lfc2VjMiAwMDAwOjc2OjAwLjA6IHFtX2FjY193Yl9ub3RfcmVh ZHlfdGltZW91dCBbZXJyb3Igc3RhdHVzPTB4NDBdIGZvdW5kCj4gPiA+IFvCoCAxNTIuNzQ3ODc3 XSBoaXNpX3NlYzIgMDAwMDo3NjowMC4wOiBzZWNfZnNtX2hiZWF0X3JpbnQgW2Vycm9yIHN0YXR1 cz0weDIwXSBmb3VuZAo+ID4gPiBbwqAgMTUyLjc1NTM0MF0gaGlzaV9zZWMyIDAwMDA6NzY6MDAu MDogQ29udHJvbGxlciByZXNldHRpbmcuLi4KPiA+ID4gW8KgIDE1Mi43NjIwNDRdIGhpc2lfc2Vj MiAwMDAwOjc2OjAwLjA6IFFNIG1haWxib3ggb3BlcmF0aW9uIHRpbWVvdXQhCj4gPiA+IFvCoCAx NTIuNzY4MTk4XSBoaXNpX3NlYzIgMDAwMDo3NjowMC4wOiBGYWlsZWQgdG8gZHVtcCBzcWMhCj4g PiA+IFvCoCAxNTIuNzczNDkwXSBoaXNpX3NlYzIgMDAwMDo3NjowMC4wOiBGYWlsZWQgdG8gZHJh aW4gb3V0IGRhdGEgZm9yIHN0b3BwaW5nIQo+ID4gPiBbwqAgMTUyLjc4MTQyNl0gaGlzaV9zZWMy IDAwMDA6NzY6MDAuMDogUU0gbWFpbGJveCBpcyBidXN5IHRvIHN0YXJ0IQo+ID4gPiBbwqAgMTUy Ljc4NzQ2OF0gaGlzaV9zZWMyIDAwMDA6NzY6MDAuMDogRmFpbGVkIHRvIGR1bXAgc3FjIQo+ID4g PiBbwqAgMTUyLjc5Mjc1M10gaGlzaV9zZWMyIDAwMDA6NzY6MDAuMDogRmFpbGVkIHRvIGRyYWlu IG91dCBkYXRhIGZvciBzdG9wcGluZyEKPiA+ID4gW8KgIDE1Mi44MDA2ODVdIGhpc2lfc2VjMiAw MDAwOjc2OjAwLjA6IFFNIG1haWxib3ggaXMgYnVzeSB0byBzdGFydCEKPiA+ID4gW8KgIDE1Mi44 MDY3MzBdIGhpc2lfc2VjMiAwMDAwOjc2OjAwLjA6IEZhaWxlZCB0byBkdW1wIHNxYyEKPiA+ID4g W8KgIDE1Mi44MTIwMTddIGhpc2lfc2VjMiAwMDAwOjc2OjAwLjA6IEZhaWxlZCB0byBkcmFpbiBv dXQgZGF0YSBmb3Igc3RvcHBpbmchCj4gPiA+IFvCoCAxNTIuODE5OTQ2XSBoaXNpX3NlYzIgMDAw MDo3NjowMC4wOiBRTSBtYWlsYm94IGlzIGJ1c3kgdG8gc3RhcnQhCj4gPiA+IFvCoCAxNTIuODI1 OTkyXSBoaXNpX3NlYzIgMDAwMDo3NjowMC4wOiBGYWlsZWQgdG8gZHVtcCBzcWMhCj4gPiBUaGF0 IHdvdWxkIGhhdmUgYmVlbiBhd2Z1bGx5IGhhbmR5IGluZm9ybWF0aW9uIHRvIGhhdmUgaW4gYW4g aW5pdGlhbCBidWcgcmVwb3J0LiA6KQo+ID4gSXMgdGhlcmUgYSBjaGFuY2UgeW91IGNvdWxkIGR1 bXAgb3V0IHRoYXQgaW9hc2lkIGFsbG9jICphbmQqIGZyZWUgaW5mb3JtYXRpb24gaW4gaW9hc2lk X2FsbG9jL2ZyZWUoKT8gIFRoaXMgY291bGQgYmUgc29tZSBraW5kIG9mIHByb2JsZW0gd2l0aCB0 aGUgYWxsb2NhdG9yLCBvciB3aXRoIGNvcHlpbmcgdGhlIGlvYXNpZCBhdCBmb3JrLgo+IFRoZSBp c3N1ZSBpcyBuZ2lueCBtYXN0ZXIgcHJvY2VzcyBpbml0IHJlc291cmNlLCBzdGFydCBkYWVtb24g cHJvY2VzcywgdGhlbgo+IG1hc3RlciBwcm9jZXNzIHF1aXQgYW5kIGZyZWUgaW9hc2lkLgo+IFRo ZSBkYWVtb24gbmdpbnggcHJvY2VzcyBpcyBub3QgdGhlIG9yaWdpbmFsIG1hc3RlciBwcm9jZXNz Lgo+IAo+IG1hc3RlciBwcm9jZXNzOsKgIGluaXQgcmVzb3VyY2UKPiBkcml2ZXIgLT4gaW9tbXVf c3ZhX2JpbmRfZGV2aWNlIC0+IGlvYXNpZF9hbGxvYwoKV2hpY2ggY29kZSBpbiB0aGUgbWFzdGVy IHByb2Nlc3MvZGFlbW9uIGNhbGxzIGRyaXZlci0+aW9tbXVfc3ZhX3VuYmluZF9kZXZpY2U/Cgo+ IAo+IG5naW54IDogbmd4X2RhZW1vbgo+IGZvcmsgZGFlbW9uLCB3aXRob3V0IGFkZCBtbSdzIHJl ZmNvdW50Lgo+IAo+IHNyYy9vcy91bml4L25neF9kYWVtb24uYwo+IG5neF9kYWVtb24obmd4X2xv Z190ICpsb2cpCj4gewo+IMKgwqDCoCBpbnTCoCBmZDsKPiAKPiDCoMKgwqAgc3dpdGNoIChmb3Jr KCkpIHsKPiDCoMKgwqAgY2FzZSAtMToKPiDCoMKgwqDCoMKgwqDCoCBuZ3hfbG9nX2Vycm9yKE5H WF9MT0dfRU1FUkcsIGxvZywgbmd4X2Vycm5vLCAiZm9yaygpIGZhaWxlZCIpOwo+IMKgwqDCoMKg wqDCoMKgIHJldHVybiBOR1hfRVJST1I7Cj4gCj4gwqDCoMKgIGNhc2UgMDrCoMKgwqAgwqDCoMKg IC8vIGhlcmUgbWFzdGVyIHByb2Nlc3MgaXMgcXVpdCBkaXJlY3RseSBhbmQgd2lsbCBiZQo+IHJl bGVhc2VkLgo+IMKgwqDCoMKgwqDCoMKgIGJyZWFrOwo+IAo+IMKgwqDCoCBkZWZhdWx0Ogo+IMKg wqDCoMKgwqDCoMKgIGV4aXQoMCk7Cj4gwqDCoMKgIH0KPiAvLyBoZXJlIGRhZW1vbiBwcm9jZXNz IHRha2UgY29udHJvbC4KPiDCoMKgwqAgbmd4X3BhcmVudCA9IG5neF9waWQ7Cj4gwqDCoMKgIG5n eF9waWQgPSBuZ3hfZ2V0cGlkKCk7Cj4gCj4gCj4gZm9yay5jCj4gY29weV9tbQo+IMKgwqDCoMKg wqDCoMKgIGlmIChjbG9uZV9mbGFncyAmIENMT05FX1ZNKSB7Cj4gwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgIG1tZ2V0KG9sZG1tKTsKPiDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqAgbW0gPSBvbGRtbTsKPiDCoMKgwqDCoMKgwqDCoCB9IGVsc2Ugewo+IMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoCBtbSA9IGR1cF9tbSh0c2ssIGN1cnJlbnQtPm1tKTvCoMKgwqAgLy8g aGVyZSBkYWVtb24gcHJvY2Vzcwo+IGhhbmRsaW5nIHdpdGhvdXQgbW1nZXQuCj4gCj4gbWFzdGVy IHByb2Nlc3MgcXVpdCwgbW1wdXQgLT7CoCBtbV9wYXNpZF9kcm9wLT5pb2FzaWRfZnJlZQo+IEJ1 dCB0aGlzIGlnbm9yZSBkcml2ZXIncyBpb21tdV9zdmFfdW5iaW5kX2RldmljZSBmdW5jdGlvbiwK PiBpb21tdV9zdmFfYmluZF9kZXZpY2UgYW5kIGlvbW11X3N2YV91bmJpbmRfZGV2aWNlIGFyZSBu b3QgcGFpcizCoCBTbyBkcml2ZXIKPiBkb2VzIG5vdCBrbm93IGlvYXNpZCBpcyBmcmVlZC4KPiAK PiBBbnkgc3VnZ2VzdGlvbj8KCmlvYXNpZCBpcyBwZXIgcHJvY2VzcyBvciBwZXIgbW0uIEEgZGFl bW9uIHByb2Nlc3Mgc2hvdWxkbid0IHNoYXJlIHRoZSBzYW1lIAppb2FzaWQgd2l0aCBhbnkgb3Ro ZXIgcHJvY2VzcyB3aXRoIGV2ZW4gaXRzIHBhcmVudCBwcm9jZXNzLiBJdHMgcGFyZW50IGdldHMK YW4gaW9hc2lkIGFuZCBmcmVlcyBpdCBvbiBleGl0LiBUaGUgaW9hc2lkIGlzIGdvbmUgYW5kIHNo b3VsZG4ndCBiZSB1c2VkCmJ5IGl0cyBjaGlsZCBwcm9jZXNzLgoKRWFjaCBkYWVtb24gcHJvY2Vz cyBzaG91bGQgY2FsbCBkcml2ZXIgLT4gaW9tbXVfc3ZhX2JpbmRfZGV2aWNlIC0+IGlvYXNpZF9h bGxvYwp0byBnZXQgaXRzIG93biBpb2FzaWQvUEFTSUQuIE9uIGRhZW1vbiBxdWl0LCB0aGUgaW9h c2lkIGlzIGZyZWVkLgoKVGhhdCBtZWFucyBucW5peCBuZWVkcyB0byBiZSBjaGFuZ2VkLgoKPiBP ciBjYW4gd2Ugc3RpbGwgdXNlIHRoZSBvcmlnaW5hbCBpb2FzaWQgcmVmY291bnQgbWVjaGFuaXNt Pwo+IAoKVGhhbmtzLgoKLUZlbmdodWEKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5k YXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3Rp bmZvL2lvbW11