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=-5.8 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 03E4AC4338F for ; Mon, 16 Aug 2021 14:50:54 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (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 9F4AB6056B for ; Mon, 16 Aug 2021 14:50:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9F4AB6056B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 677984027A; Mon, 16 Aug 2021 14:50:53 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org 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 BLMtMaiINdUk; Mon, 16 Aug 2021 14:50:49 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp4.osuosl.org (Postfix) with ESMTPS id 420A840234; Mon, 16 Aug 2021 14:50:49 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 14FEEC0010; Mon, 16 Aug 2021 14:50:49 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4EB74C000E for ; Mon, 16 Aug 2021 14:50:47 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 2FFD5402D8 for ; Mon, 16 Aug 2021 14:50:47 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org 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 O9kZU4N_FJhb for ; Mon, 16 Aug 2021 14:50:43 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by smtp4.osuosl.org (Postfix) with ESMTPS id F254040234 for ; Mon, 16 Aug 2021 14:50:42 +0000 (UTC) Received: by mail-pj1-x1029.google.com with SMTP id n5so6429675pjt.4 for ; Mon, 16 Aug 2021 07:50:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=WJWFiW1tNTGnEXAY83sW/96pfLutJ+nc92p/dxWLkZg=; b=NXbT1zLrDuMqskh2PkrXNK2vbCTKyrRJCbfTY5Bly9fYQ/XU0SfRcVq5Opg7hJuYPq WAHFOfTPq1K1gGqDqCEl7LfXOVRnVK+Trx+MMYCG7OPlcmQ484293t+hm2eNoNgWwPWn FMa4FwwJpv6nh2ij8bhxvHhBGoaIurIFplj7wnpKTSuRMnyldRdPcAWWcSmd+W7oZuoa 90O5BmPR7Iyg7k9vnQyRNKKQWgQWCvIDkqkqBKagNtE87pOxDe8b9ZAS8kRj2RhhMem8 RcODv8S8rQQKapLBdjj/yipP4YK2d1vrMKq6Wk4vAH1jeB7D9R7aSg32dzMV4dgTGHNn cHbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=WJWFiW1tNTGnEXAY83sW/96pfLutJ+nc92p/dxWLkZg=; b=nJoubkhfbMQe9kogXD/+06lPA0GmkQSvnqY39oueWDrFuMeDXWK4U45p6rpp9r0nQt 0cSSBknss+jO9C7rZiaVUUG9Ro4qAzId4pdeY+tZ/+M5XBl9tkGa1JUv+WRS76N3DWed lWsBsRV+6ns0msQ5m5bgbSfliCJCoDz5KUIbbevvHwtcun1yyu7A/i2yeEABvwFAmFzS YE80/ZhoPFuXCeuGWhoqnxJDJ+ruCuunk1osbOa5EJiPnlSx5FIVuN0XRkaMDK+WzTG5 TfvZK0K9hLsCYOOnIkIPN6VpSLnXe7J61RNiln9iT7ae3TQNWrgF/z17lViifi11GF5T qfgw== X-Gm-Message-State: AOAM530yJmBhK7ubac92VoQ9VYYPHVd7JUxyoXe/2/V/nPyBswssffNS ROmwAe03hqwP9Zr09hWNl1I= X-Google-Smtp-Source: ABdhPJwwGaWbF5lMH7zWG8CjOdMFhlJFveeUXJRyURV3wu36AAVQm0z4EMghAqWltWQj3nIzdJtriw== X-Received: by 2002:a17:90b:3014:: with SMTP id hg20mr17976900pjb.140.1629125442297; Mon, 16 Aug 2021 07:50:42 -0700 (PDT) Received: from ?IPv6:2404:f801:0:5:8000::50b? ([2404:f801:9000:18:efec::50b]) by smtp.gmail.com with ESMTPSA id z2sm6264141pgb.33.2021.08.16.07.50.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 16 Aug 2021 07:50:41 -0700 (PDT) Subject: Re: [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM From: Tianyu Lan To: Christoph Hellwig References: <20210809175620.720923-1-ltykernel@gmail.com> <20210809175620.720923-11-ltykernel@gmail.com> <20210812122741.GC19050@lst.de> Message-ID: <890e5e21-714a-2db6-f68a-6211a69bebb9@gmail.com> Date: Mon, 16 Aug 2021 22:50:26 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Cc: parri.andrea@gmail.com, linux-hyperv@vger.kernel.org, brijesh.singh@amd.com, peterz@infradead.org, dave.hansen@linux.intel.com, dave.hansen@intel.com, hpa@zytor.com, kys@microsoft.com, will@kernel.org, boris.ostrovsky@oracle.com, linux-arch@vger.kernel.org, sfr@canb.auug.org.au, wei.liu@kernel.org, sstabellini@kernel.org, sthemmin@microsoft.com, xen-devel@lists.xenproject.org, linux-scsi@vger.kernel.org, aneesh.kumar@linux.ibm.com, x86@kernel.org, decui@microsoft.com, ardb@kernel.org, michael.h.kelley@microsoft.com, mingo@redhat.com, pgonda@google.com, rientjes@google.com, kuba@kernel.org, jejb@linux.ibm.com, martin.b.radev@gmail.com, thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com, arnd@arndb.de, konrad.wilk@oracle.com, haiyangz@microsoft.com, bp@alien8.de, luto@kernel.org, krish.sadhukhan@oracle.com, tglx@linutronix.de, vkuznets@redhat.com, jgross@suse.com, martin.petersen@oracle.com, saravanand@fb.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, rppt@kernel.org, hannes@cmpxchg.org, tj@kernel.org, akpm@linux-foundation.org, robin.murphy@arm.com, davem@davemloft.net, kirill.shutemov@linux.intel.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" T24gOC8xNC8yMDIxIDE6NTggQU0sIFRpYW55dSBMYW4gd3JvdGU6Cj4gT24gOC8xMi8yMDIxIDg6 MjcgUE0sIENocmlzdG9waCBIZWxsd2lnIHdyb3RlOgo+PiBUaGlzIGlzIHN0aWxsIGJyb2tlbi7C oCBZb3UgbmVlZCB0byBtYWtlIHN1cmUgdGhlIGFjdHVhbCBETUEgYWxsb2NhdGlvbnMKPj4gZG8g aGF2ZSBzdHJ1Y3QgcGFnZSBiYWNraW5nLgo+Pgo+IAo+IEhpIENocmlzdG9waDoKPiAgwqDCoMKg wqAgc3dpb3RsYl90YmxfbWFwX3NpbmdsZSgpIHN0aWxsIHJldHVybnMgUEEgYmVsb3cgdlRPTS9z aGFyZV9ncGFfID4gYm91bmRhcnkuIFRoZXNlIFBBcyBoYXMgYmFja2luZyBwYWdlcyBhbmQgYmVs b25nIHRvIHN5c3RlbSBtZW1vcnkuCj4gSW4gb3RoZXIgd29yZCwgYWxsIFBBcyBwYXNzZWQgdG8g RE1BIEFQSSBoYXZlIGJhY2tpbmcgcGFnZXMgYW5kIHRoZXNlIGlzIAo+IG5vIGRpZmZlcmVuY2Ug YmV0d2VlbiBJc29sYXRpb24gZ3Vlc3QgYW5kIHRyYWRpdGlvbmFsIGd1ZXN0IGZvciBETUEgQVBJ Lgo+IFRoZSBuZXcgbWFwcGVkIFZBIGZvciBQQSBhYm92ZSB2VE9NIGhlcmUgaXMganVzdCB0byBh Y2Nlc3MgdGhlIGJvdW5jZSAKPiBidWZmZXIgaW4gdGhlIHN3aW90bGIgY29kZSBhbmQgaXNuJ3Qg ZXhwb3NlZCB0byBvdXRzaWRlLgoKSGkgQ2hyaXN0b3BoOgogICAgICAgU29ycnkgdG8gYm90aGVy IHlvdS5QbGVhc2UgZG91YmxlIGNoZWNrIHdpdGggdGhlc2UgdHdvIHBhdGNoZXMKIiBbUEFUQ0gg VjMgMTAvMTNdIHg4Ni9Td2lvdGxiOiBBZGQgU3dpb3RsYiBib3VuY2UgYnVmZmVyIHJlbWFwIGZ1 bmN0aW9uIApmb3IgSFYgSVZNIiBhbmQgIltQQVRDSCBWMyAwOS8xM10gRE1BOiBBZGQgZG1hX21h cF9kZWNyeXB0ZWQvZG1hXwp1bm1hcF9lbmNyeXB0ZWQoKSBmdW5jdGlvbiIuCiAgICAgICBUaGUg c3dpb3RsYiBib3VuY2UgYnVmZmVyIGluIHRoZSBpc29sYXRpb24gVk0gYXJlIGFsbG9jYXRlZCBp biB0aGUKbG93IGVuZCBtZW1vcnkgYW5kIHRoZXNlIG1lbW9yeSBoYXMgc3RydWN0IHBhZ2UgYmFj a2luZy4gQWxsIGRtYSBhZGRyZXNzCnJldHVybmVkIGJ5IHN3aW90bGIvRE1BIEFQSSBhcmUgbG93 IGVuZCBtZW1vcnkgYW5kIHRoaXMgaXMgYXMgc2FtZSBhcyAKd2hhdCBoYXBwZW4gaW4gdGhlIHRy YWRpdGlvbmFsIFZNLlNvIHRoaXMgbWVhbnMgYWxsIFBBcyBwYXNzZWQgdG8gRE1BIApBUEkgaGF2 ZSBzdHJ1Y3QgcGFnZSBiYWNraW5nLiBUaGUgZGlmZmVyZW5jZSBpbiBJc29sYXRpb24gVk0gaXMg dG8gCmFjY2VzcyBib3VuY2UgYnVmZmVyIHZpYSBhZGRyZXNzIHNwYWNlIGFib3ZlIHZUT00vc2hh cmVkX2d1ZXN0X21lbW9yeQpfYm91bmRhcnkuIFRvIGFjY2VzcyBib3VuY2UgYnVmZmVyIHNoYXJl ZCB3aXRoIGhvc3QsIHRoZSBndWVzdCBuZWVkcyB0bwptYXJrIHRoZSBtZW1vcnkgdmlzaWJsZSB0 byBob3N0IHZpYSBoeXBlcmNhbGwgYW5kIG1hcCBib3VuY2UgYnVmZmVyIGluIAp0aGUgZXh0cmEg YWRkcmVzcyBzcGFjZShQQSArIHNoYXJlZF9ndWVzdF9tZW1vcnlfYm91bmRhcnkpLiBUaGUgdnN0 YXJ0CmludHJvZHVjZWQgaW4gdGhpcyBwYXRjaCBpcyB0byBzdG9yZSB2YSBvZiBleHRyYSBhZGRy ZXNzIHNwYWNlIGFuZCBpdCdzIApvbmx5IHVzZWQgdG8gYWNjZXNzIGJvdW5jZSBidWZmZXIgaW4g dGhlIHN3aW90bGJfYm91bmNlKCkuIFRoZSBQQSBpbiAKZXh0cmEgc3BhY2UgaXMgb25seSBpbiB0 aGUgSHlwZXItViBtYXAgZnVuY3Rpb24gYW5kIHdvbid0IGJlIHBhc3NlZCB0byAKRE1BIEFQSSBv ciBvdGhlciBjb21wb25lbnRzLgogICAgICAgVGhlIEFQSSBkbWFfbWFwX2RlY3J5cHRlZCgpIGlu dHJvZHVjZWQgaW4gdGhlIHBhdGNoIDkgaXMgdG8gbWFwIAp0aGUgYm91bmNlIGJ1ZmZlciBpbiB0 aGUgZXh0cmEgc3BhY2UgYW5kIHRoZXNlIG1lbW9yeSBpbiB0aGUgbG93IGVuZCAKc3BhY2UgYXJl IHVzZWQgYXMgRE1BIG1lbW9yeSBpbiB0aGUgZHJpdmVyLiBEbyB5b3UgcHJlZmVyIHRoZXNlIEFQ SXMKc3RpbGwgaW4gdGhlIHNldF9tZW1vcnkuYz8gSSBtb3ZlIHRoZSBBUEkgdG8gZG1hL21hcHBp bmcuYyBkdWUgdG8gdGhlCnN1Z2dlc3RlZCBuYW1lIGFyY2hfZG1hX21hcF9kZWNyeXB0ZWQoKSBp biB0aGUgcHJldmlvdXMgbWFpbAooaHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvbmV0ZGV2LzIwMjEw NzIwMTM1NDM3LkdBMTM1NTRAbHN0LmRlLykuCiAgICAgICBJZiB0aGVyZSBhcmUgc29tZXRoaW5n IHVuY2xlYXIsIHBsZWFzZSBsZXQgbWUga25vdy4gSG9wZSB0aGlzCnN0aWxsIGNhbiBjYXRjaCB0 aGUgbWVyZ2Ugd2luZG93LgoKVGhhbmtzLgoKCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4 LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFu L2xpc3RpbmZvL2lvbW11