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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 1FA41C4CEC7 for ; Sat, 14 Sep 2019 08:49:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9B7B2089C for ; Sat, 14 Sep 2019 08:49:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568450998; bh=J9o3/Ce1+YLaWOJS+1y9FmaoiXDLsFcat/B4OJD07xQ=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=Y6N0QomgMeV6+v7xKnE2Io+499uJK1gwg/DYoxHCT7QboiIEs8v4LC0okV2l29i1p MzrQbRjyljpI9ivWTnzsi6qiuh2rb20jK2Bbo7jpF6b7Cr7LTozNPAOjJ6iyCQbHqU X4bCRxBKV3cKwdq88Pb6rVRcw9VWlk/D75AwLPcc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727658AbfINIt4 (ORCPT ); Sat, 14 Sep 2019 04:49:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:33382 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727481AbfINIt4 (ORCPT ); Sat, 14 Sep 2019 04:49:56 -0400 Received: from mail-wr1-f54.google.com (mail-wr1-f54.google.com [209.85.221.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D1529214AE for ; Sat, 14 Sep 2019 08:49:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568450995; bh=J9o3/Ce1+YLaWOJS+1y9FmaoiXDLsFcat/B4OJD07xQ=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=NvC0HAkbO+X0R/hUr5ElgQAkn9X+DlHgQCaI+WUT3QaLpkyww7ouKYCiu+gLQdPnN Zt2iNLvAcaA/7M7mBWG5GC72IVnUlLTjmJnBCwL8Gs+y4/DomRNvqSFSk4OlGnDjoe Dtl/nAegdQl/qfiWPrj/maTEs4oYOJwLv1kg+bio= Received: by mail-wr1-f54.google.com with SMTP id h7so33183776wrw.8 for ; Sat, 14 Sep 2019 01:49:54 -0700 (PDT) X-Gm-Message-State: APjAAAXL4ES9vmkPCU9QSCvU1NGXsCh9sXKGi7o0DZ/soVqn0XviDIAs In0ILWQIl/OF8Mna9SUHYjC9QM29Y1XwUFpdrKY= X-Google-Smtp-Source: APXvYqxg6MtzWsHNFmLRbH0IHgwRMp+vQZNFO479wjLXexAnH2ZbcUXa06WI/GBB3zidLYAHo44uDXvnrwuUeLiSDAI= X-Received: by 2002:adf:fe0f:: with SMTP id n15mr5204507wrr.343.1568450992705; Sat, 14 Sep 2019 01:49:52 -0700 (PDT) MIME-Version: 1.0 References: <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> <20190619091219.GB7767@fuggles.cambridge.arm.com> <20190619123939.GF7767@fuggles.cambridge.arm.com> <20190624104006.lvm32nahemaqklxc@willie-the-truck> <20190912140256.fwbutgmadpjbjnab@willie-the-truck> In-Reply-To: From: Guo Ren Date: Sat, 14 Sep 2019 16:49:40 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Will Deacon Cc: Will Deacon , julien.thierry@arm.com, aou@eecs.berkeley.edu, james.morse@arm.com, Arnd Bergmann , suzuki.poulose@arm.com, Marc Zyngier , Catalin Marinas , Anup Patel , Linux Kernel Mailing List , Mike Rapoport , Christoph Hellwig , Atish Patra , Julien Grall , Palmer Dabbelt , gary@garyguo.net, Paul Walmsley , christoffer.dall@arm.com, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Here is the presentation, any comments is welcome. https://docs.google.com/presentation/d/1sc295JznVAfDIPieAqzjcyUkcHnNFQsK8FF= qdoCY854/edit?usp=3Dsharing On Fri, Sep 13, 2019 at 3:13 PM Guo Ren wrote: > > Another idea is seperate remote TLB invalidate into two instructions: > > - sfence.vma.b.asyc > - sfence.vma.b.barrier // wait all async TLB invalidate operations finis= hed for all harts. > > (I remember who mentioned me separate them into two instructions after se= ssion. Anup? Is the idea right ?) > > Actually, I never consider asyc TLB invalidate before, because current ou= r light iommu did not need it. > > Thx all people attend the session :) Let's continue the talk. > > > Guo Ren =E4=BA=8E 2019=E5=B9=B49=E6=9C=8812=E6=97=A5= =E5=91=A8=E5=9B=9B 22:59=E5=86=99=E9=81=93=EF=BC=9A >> >> Thx Will for reply. >> >> On Thu, Sep 12, 2019 at 3:03 PM Will Deacon wrote: >> > >> > On Sun, Sep 08, 2019 at 07:52:55AM +0800, Guo Ren wrote: >> > > On Mon, Jun 24, 2019 at 6:40 PM Will Deacon wrote: >> > > > > I'll keep my system use the same ASID for SMP + IOMMU :P >> > > > >> > > > You will want a separate allocator for that: >> > > > >> > > > https://lkml.kernel.org/r/20190610184714.6786-2-jean-philippe.bruc= ker@arm.com >> > > >> > > Yes, it is hard to maintain ASID between IOMMU and CPUMMU or differe= nt >> > > system, because it's difficult to synchronize the IO_ASID when the C= PU >> > > ASID is rollover. >> > > But we could still use hardware broadcast TLB invalidation instructi= on >> > > to uniformly manage the ASID and IO_ASID, or OTHER_ASID in our IOMMU= . >> > >> > That's probably a bad idea, because you'll likely stall execution on t= he >> > CPU until the IOTLB has completed invalidation. In the case of ATS, I = think >> > an endpoint ATC is permitted to take over a minute to respond. In real= ity, I >> > suspect the worst you'll ever see would be in the msec range, but that= 's >> > still an unacceptable period of time to hold a CPU. >> Just as I've said in the session that IOTLB invalidate delay is >> another topic, My main proposal is to introduce stage1.pgd and >> stage2.pgd as address space identifiers between different TLB systems >> based on vmid, asid. My last part of sildes will show you how to >> translate stage1/2.pgd to as/vmid in PCI ATS system and the method >> could work with SMMU-v3 and intel Vt-d. (It's regret for me there is >> no time to show you the whole slides.) >> >> In our light IOMMU implementation, there's no IOTLB invalidate delay >> problem. Becasue IOMMU is very close to CPU MMU and interconnect's >> delay is the same with SMP CPUs MMU (no PCI, VM supported). >> >> To solve the problem, we could define a async mode in sfence.vma.b to >> slove the problem and finished with per_cpu_irq/exception. >> >> -- >> Best Regards >> Guo Ren >> >> ML: https://lore.kernel.org/linux-csky/ --=20 Best Regards Guo Ren ML: https://lore.kernel.org/linux-csky/ 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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 9397EC49ED6 for ; Sat, 14 Sep 2019 08:50:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 638F920717 for ; 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Sat, 14 Sep 2019 08:49:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568450995; bh=J9o3/Ce1+YLaWOJS+1y9FmaoiXDLsFcat/B4OJD07xQ=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=NvC0HAkbO+X0R/hUr5ElgQAkn9X+DlHgQCaI+WUT3QaLpkyww7ouKYCiu+gLQdPnN Zt2iNLvAcaA/7M7mBWG5GC72IVnUlLTjmJnBCwL8Gs+y4/DomRNvqSFSk4OlGnDjoe Dtl/nAegdQl/qfiWPrj/maTEs4oYOJwLv1kg+bio= Received: by mail-wr1-f44.google.com with SMTP id l11so34157089wrx.5; Sat, 14 Sep 2019 01:49:54 -0700 (PDT) X-Gm-Message-State: APjAAAVfwvFVA4JG5ForHCOl1WGefD1rAJMdkk8mNtDJmulh4NQLmbEG QYCYyZ6kninxnd6FMX/mN7vK0Wg7Hz33RbyyCUw= X-Google-Smtp-Source: APXvYqxg6MtzWsHNFmLRbH0IHgwRMp+vQZNFO479wjLXexAnH2ZbcUXa06WI/GBB3zidLYAHo44uDXvnrwuUeLiSDAI= X-Received: by 2002:adf:fe0f:: with SMTP id n15mr5204507wrr.343.1568450992705; Sat, 14 Sep 2019 01:49:52 -0700 (PDT) MIME-Version: 1.0 References: <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> <20190619091219.GB7767@fuggles.cambridge.arm.com> <20190619123939.GF7767@fuggles.cambridge.arm.com> <20190624104006.lvm32nahemaqklxc@willie-the-truck> <20190912140256.fwbutgmadpjbjnab@willie-the-truck> In-Reply-To: From: Guo Ren Date: Sat, 14 Sep 2019 16:49:40 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190914_014957_369580_FBDB2446 X-CRM114-Status: GOOD ( 17.56 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: julien.thierry@arm.com, Catalin Marinas , Palmer Dabbelt , Will Deacon , christoffer.dall@arm.com, Atish Patra , Julien Grall , gary@garyguo.net, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Mike Rapoport , Christoph Hellwig , aou@eecs.berkeley.edu, Arnd Bergmann , suzuki.poulose@arm.com, Marc Zyngier , Paul Walmsley , linux-arm-kernel@lists.infradead.org, Anup Patel , Linux Kernel Mailing List , iommu@lists.linux-foundation.org, james.morse@arm.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org SGVyZSBpcyB0aGUgcHJlc2VudGF0aW9uLCBhbnkgY29tbWVudHMgaXMgd2VsY29tZS4KCmh0dHBz Oi8vZG9jcy5nb29nbGUuY29tL3ByZXNlbnRhdGlvbi9kLzFzYzI5NUp6blZBZkRJUGllQXF6amN5 VWtjSG5ORlFzSzhGRnFkb0NZODU0L2VkaXQ/dXNwPXNoYXJpbmcKCk9uIEZyaSwgU2VwIDEzLCAy MDE5IGF0IDM6MTMgUE0gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IHdyb3RlOgo+Cj4gQW5v dGhlciBpZGVhIGlzIHNlcGVyYXRlIHJlbW90ZSBUTEIgaW52YWxpZGF0ZSBpbnRvIHR3byBpbnN0 cnVjdGlvbnM6Cj4KPiAgLSBzZmVuY2Uudm1hLmIuYXN5Ywo+ICAtIHNmZW5jZS52bWEuYi5iYXJy aWVyIC8vIHdhaXQgYWxsIGFzeW5jIFRMQiBpbnZhbGlkYXRlIG9wZXJhdGlvbnMgZmluaXNoZWQg Zm9yIGFsbCBoYXJ0cy4KPgo+IChJIHJlbWVtYmVyIHdobyBtZW50aW9uZWQgbWUgc2VwYXJhdGUg dGhlbSBpbnRvIHR3byBpbnN0cnVjdGlvbnMgYWZ0ZXIgc2Vzc2lvbi4gQW51cD8gSXMgdGhlIGlk ZWEgcmlnaHQgPykKPgo+IEFjdHVhbGx5LCBJIG5ldmVyIGNvbnNpZGVyIGFzeWMgVExCIGludmFs aWRhdGUgYmVmb3JlLCBiZWNhdXNlIGN1cnJlbnQgb3VyIGxpZ2h0IGlvbW11IGRpZCBub3QgbmVl ZCBpdC4KPgo+IFRoeCBhbGwgcGVvcGxlIGF0dGVuZCB0aGUgc2Vzc2lvbiA6KSBMZXQncyBjb250 aW51ZSB0aGUgdGFsay4KPgo+Cj4gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IOS6jiAyMDE5 5bm0OeaciDEy5pel5ZGo5ZubIDIyOjU55YaZ6YGT77yaCj4+Cj4+IFRoeCBXaWxsIGZvciByZXBs eS4KPj4KPj4gT24gVGh1LCBTZXAgMTIsIDIwMTkgYXQgMzowMyBQTSBXaWxsIERlYWNvbiA8d2ls bEBrZXJuZWwub3JnPiB3cm90ZToKPj4gPgo+PiA+IE9uIFN1biwgU2VwIDA4LCAyMDE5IGF0IDA3 OjUyOjU1QU0gKzA4MDAsIEd1byBSZW4gd3JvdGU6Cj4+ID4gPiBPbiBNb24sIEp1biAyNCwgMjAx OSBhdCA2OjQwIFBNIFdpbGwgRGVhY29uIDx3aWxsQGtlcm5lbC5vcmc+IHdyb3RlOgo+PiA+ID4g PiA+IEknbGwga2VlcCBteSBzeXN0ZW0gdXNlIHRoZSBzYW1lIEFTSUQgZm9yIFNNUCArIElPTU1V IDpQCj4+ID4gPiA+Cj4+ID4gPiA+IFlvdSB3aWxsIHdhbnQgYSBzZXBhcmF0ZSBhbGxvY2F0b3Ig Zm9yIHRoYXQ6Cj4+ID4gPiA+Cj4+ID4gPiA+IGh0dHBzOi8vbGttbC5rZXJuZWwub3JnL3IvMjAx OTA2MTAxODQ3MTQuNjc4Ni0yLWplYW4tcGhpbGlwcGUuYnJ1Y2tlckBhcm0uY29tCj4+ID4gPgo+ PiA+ID4gWWVzLCBpdCBpcyBoYXJkIHRvIG1haW50YWluIEFTSUQgYmV0d2VlbiBJT01NVSBhbmQg Q1BVTU1VIG9yIGRpZmZlcmVudAo+PiA+ID4gc3lzdGVtLCBiZWNhdXNlIGl0J3MgZGlmZmljdWx0 IHRvIHN5bmNocm9uaXplIHRoZSBJT19BU0lEIHdoZW4gdGhlIENQVQo+PiA+ID4gQVNJRCBpcyBy b2xsb3Zlci4KPj4gPiA+IEJ1dCB3ZSBjb3VsZCBzdGlsbCB1c2UgaGFyZHdhcmUgYnJvYWRjYXN0 IFRMQiBpbnZhbGlkYXRpb24gaW5zdHJ1Y3Rpb24KPj4gPiA+IHRvIHVuaWZvcm1seSBtYW5hZ2Ug dGhlIEFTSUQgYW5kIElPX0FTSUQsIG9yIE9USEVSX0FTSUQgaW4gb3VyIElPTU1VLgo+PiA+Cj4+ ID4gVGhhdCdzIHByb2JhYmx5IGEgYmFkIGlkZWEsIGJlY2F1c2UgeW91J2xsIGxpa2VseSBzdGFs bCBleGVjdXRpb24gb24gdGhlCj4+ID4gQ1BVIHVudGlsIHRoZSBJT1RMQiBoYXMgY29tcGxldGVk IGludmFsaWRhdGlvbi4gSW4gdGhlIGNhc2Ugb2YgQVRTLCBJIHRoaW5rCj4+ID4gYW4gZW5kcG9p bnQgQVRDIGlzIHBlcm1pdHRlZCB0byB0YWtlIG92ZXIgYSBtaW51dGUgdG8gcmVzcG9uZC4gSW4g cmVhbGl0eSwgSQo+PiA+IHN1c3BlY3QgdGhlIHdvcnN0IHlvdSdsbCBldmVyIHNlZSB3b3VsZCBi ZSBpbiB0aGUgbXNlYyByYW5nZSwgYnV0IHRoYXQncwo+PiA+IHN0aWxsIGFuIHVuYWNjZXB0YWJs ZSBwZXJpb2Qgb2YgdGltZSB0byBob2xkIGEgQ1BVLgo+PiBKdXN0IGFzIEkndmUgc2FpZCBpbiB0 aGUgc2Vzc2lvbiB0aGF0IElPVExCIGludmFsaWRhdGUgZGVsYXkgaXMKPj4gYW5vdGhlciB0b3Bp YywgTXkgbWFpbiBwcm9wb3NhbCBpcyB0byBpbnRyb2R1Y2Ugc3RhZ2UxLnBnZCBhbmQKPj4gc3Rh Z2UyLnBnZCBhcyBhZGRyZXNzIHNwYWNlIGlkZW50aWZpZXJzIGJldHdlZW4gZGlmZmVyZW50IFRM QiBzeXN0ZW1zCj4+IGJhc2VkIG9uIHZtaWQsIGFzaWQuIE15IGxhc3QgcGFydCBvZiBzaWxkZXMg d2lsbCBzaG93IHlvdSBob3cgdG8KPj4gdHJhbnNsYXRlIHN0YWdlMS8yLnBnZCB0byBhcy92bWlk IGluIFBDSSBBVFMgc3lzdGVtIGFuZCB0aGUgbWV0aG9kCj4+IGNvdWxkIHdvcmsgd2l0aCBTTU1V LXYzIGFuZCBpbnRlbCBWdC1kLiAoSXQncyByZWdyZXQgZm9yIG1lIHRoZXJlIGlzCj4+IG5vIHRp bWUgdG8gc2hvdyB5b3UgdGhlIHdob2xlIHNsaWRlcy4pCj4+Cj4+IEluIG91ciBsaWdodCBJT01N VSBpbXBsZW1lbnRhdGlvbiwgdGhlcmUncyBubyBJT1RMQiBpbnZhbGlkYXRlIGRlbGF5Cj4+IHBy b2JsZW0uIEJlY2FzdWUgSU9NTVUgaXMgdmVyeSBjbG9zZSB0byBDUFUgTU1VIGFuZCBpbnRlcmNv bm5lY3Qncwo+PiBkZWxheSBpcyB0aGUgc2FtZSB3aXRoIFNNUCBDUFVzIE1NVSAobm8gUENJLCBW TSBzdXBwb3J0ZWQpLgo+Pgo+PiBUbyBzb2x2ZSB0aGUgcHJvYmxlbSwgd2UgY291bGQgZGVmaW5l IGEgYXN5bmMgbW9kZSBpbiBzZmVuY2Uudm1hLmIgdG8KPj4gc2xvdmUgdGhlIHByb2JsZW0gYW5k IGZpbmlzaGVkIHdpdGggcGVyX2NwdV9pcnEvZXhjZXB0aW9uLgo+Pgo+PiAtLQo+PiBCZXN0IFJl Z2FyZHMKPj4gIEd1byBSZW4KPj4KPj4gTUw6IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xpbnV4 LWNza3kvCgoKCi0tIApCZXN0IFJlZ2FyZHMKIEd1byBSZW4KCk1MOiBodHRwczovL2xvcmUua2Vy bmVsLm9yZy9saW51eC1jc2t5LwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0CmxpbnV4LXJpc2N2QGxpc3RzLmlu ZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9s aW51eC1yaXNjdgo= 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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 A2208C49ED6 for ; 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Sat, 14 Sep 2019 01:49:52 -0700 (PDT) MIME-Version: 1.0 References: <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> <20190619091219.GB7767@fuggles.cambridge.arm.com> <20190619123939.GF7767@fuggles.cambridge.arm.com> <20190624104006.lvm32nahemaqklxc@willie-the-truck> <20190912140256.fwbutgmadpjbjnab@willie-the-truck> In-Reply-To: From: Guo Ren Date: Sat, 14 Sep 2019 16:49:40 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Will Deacon Cc: julien.thierry@arm.com, Catalin Marinas , Palmer Dabbelt , Will Deacon , christoffer.dall@arm.com, Atish Patra , Julien Grall , gary@garyguo.net, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Mike Rapoport , aou@eecs.berkeley.edu, Arnd Bergmann , suzuki.poulose@arm.com, Marc Zyngier , Paul Walmsley , linux-arm-kernel@lists.infradead.org, Anup Patel , Linux Kernel Mailing List , iommu@lists.linux-foundation.org, james.morse@arm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 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 Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org SGVyZSBpcyB0aGUgcHJlc2VudGF0aW9uLCBhbnkgY29tbWVudHMgaXMgd2VsY29tZS4KCmh0dHBz Oi8vZG9jcy5nb29nbGUuY29tL3ByZXNlbnRhdGlvbi9kLzFzYzI5NUp6blZBZkRJUGllQXF6amN5 VWtjSG5ORlFzSzhGRnFkb0NZODU0L2VkaXQ/dXNwPXNoYXJpbmcKCk9uIEZyaSwgU2VwIDEzLCAy MDE5IGF0IDM6MTMgUE0gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IHdyb3RlOgo+Cj4gQW5v dGhlciBpZGVhIGlzIHNlcGVyYXRlIHJlbW90ZSBUTEIgaW52YWxpZGF0ZSBpbnRvIHR3byBpbnN0 cnVjdGlvbnM6Cj4KPiAgLSBzZmVuY2Uudm1hLmIuYXN5Ywo+ICAtIHNmZW5jZS52bWEuYi5iYXJy aWVyIC8vIHdhaXQgYWxsIGFzeW5jIFRMQiBpbnZhbGlkYXRlIG9wZXJhdGlvbnMgZmluaXNoZWQg Zm9yIGFsbCBoYXJ0cy4KPgo+IChJIHJlbWVtYmVyIHdobyBtZW50aW9uZWQgbWUgc2VwYXJhdGUg dGhlbSBpbnRvIHR3byBpbnN0cnVjdGlvbnMgYWZ0ZXIgc2Vzc2lvbi4gQW51cD8gSXMgdGhlIGlk ZWEgcmlnaHQgPykKPgo+IEFjdHVhbGx5LCBJIG5ldmVyIGNvbnNpZGVyIGFzeWMgVExCIGludmFs aWRhdGUgYmVmb3JlLCBiZWNhdXNlIGN1cnJlbnQgb3VyIGxpZ2h0IGlvbW11IGRpZCBub3QgbmVl ZCBpdC4KPgo+IFRoeCBhbGwgcGVvcGxlIGF0dGVuZCB0aGUgc2Vzc2lvbiA6KSBMZXQncyBjb250 aW51ZSB0aGUgdGFsay4KPgo+Cj4gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IOS6jiAyMDE5 5bm0OeaciDEy5pel5ZGo5ZubIDIyOjU55YaZ6YGT77yaCj4+Cj4+IFRoeCBXaWxsIGZvciByZXBs eS4KPj4KPj4gT24gVGh1LCBTZXAgMTIsIDIwMTkgYXQgMzowMyBQTSBXaWxsIERlYWNvbiA8d2ls bEBrZXJuZWwub3JnPiB3cm90ZToKPj4gPgo+PiA+IE9uIFN1biwgU2VwIDA4LCAyMDE5IGF0IDA3 OjUyOjU1QU0gKzA4MDAsIEd1byBSZW4gd3JvdGU6Cj4+ID4gPiBPbiBNb24sIEp1biAyNCwgMjAx OSBhdCA2OjQwIFBNIFdpbGwgRGVhY29uIDx3aWxsQGtlcm5lbC5vcmc+IHdyb3RlOgo+PiA+ID4g PiA+IEknbGwga2VlcCBteSBzeXN0ZW0gdXNlIHRoZSBzYW1lIEFTSUQgZm9yIFNNUCArIElPTU1V IDpQCj4+ID4gPiA+Cj4+ID4gPiA+IFlvdSB3aWxsIHdhbnQgYSBzZXBhcmF0ZSBhbGxvY2F0b3Ig Zm9yIHRoYXQ6Cj4+ID4gPiA+Cj4+ID4gPiA+IGh0dHBzOi8vbGttbC5rZXJuZWwub3JnL3IvMjAx OTA2MTAxODQ3MTQuNjc4Ni0yLWplYW4tcGhpbGlwcGUuYnJ1Y2tlckBhcm0uY29tCj4+ID4gPgo+ PiA+ID4gWWVzLCBpdCBpcyBoYXJkIHRvIG1haW50YWluIEFTSUQgYmV0d2VlbiBJT01NVSBhbmQg Q1BVTU1VIG9yIGRpZmZlcmVudAo+PiA+ID4gc3lzdGVtLCBiZWNhdXNlIGl0J3MgZGlmZmljdWx0 IHRvIHN5bmNocm9uaXplIHRoZSBJT19BU0lEIHdoZW4gdGhlIENQVQo+PiA+ID4gQVNJRCBpcyBy b2xsb3Zlci4KPj4gPiA+IEJ1dCB3ZSBjb3VsZCBzdGlsbCB1c2UgaGFyZHdhcmUgYnJvYWRjYXN0 IFRMQiBpbnZhbGlkYXRpb24gaW5zdHJ1Y3Rpb24KPj4gPiA+IHRvIHVuaWZvcm1seSBtYW5hZ2Ug dGhlIEFTSUQgYW5kIElPX0FTSUQsIG9yIE9USEVSX0FTSUQgaW4gb3VyIElPTU1VLgo+PiA+Cj4+ ID4gVGhhdCdzIHByb2JhYmx5IGEgYmFkIGlkZWEsIGJlY2F1c2UgeW91J2xsIGxpa2VseSBzdGFs bCBleGVjdXRpb24gb24gdGhlCj4+ID4gQ1BVIHVudGlsIHRoZSBJT1RMQiBoYXMgY29tcGxldGVk IGludmFsaWRhdGlvbi4gSW4gdGhlIGNhc2Ugb2YgQVRTLCBJIHRoaW5rCj4+ID4gYW4gZW5kcG9p bnQgQVRDIGlzIHBlcm1pdHRlZCB0byB0YWtlIG92ZXIgYSBtaW51dGUgdG8gcmVzcG9uZC4gSW4g cmVhbGl0eSwgSQo+PiA+IHN1c3BlY3QgdGhlIHdvcnN0IHlvdSdsbCBldmVyIHNlZSB3b3VsZCBi ZSBpbiB0aGUgbXNlYyByYW5nZSwgYnV0IHRoYXQncwo+PiA+IHN0aWxsIGFuIHVuYWNjZXB0YWJs ZSBwZXJpb2Qgb2YgdGltZSB0byBob2xkIGEgQ1BVLgo+PiBKdXN0IGFzIEkndmUgc2FpZCBpbiB0 aGUgc2Vzc2lvbiB0aGF0IElPVExCIGludmFsaWRhdGUgZGVsYXkgaXMKPj4gYW5vdGhlciB0b3Bp YywgTXkgbWFpbiBwcm9wb3NhbCBpcyB0byBpbnRyb2R1Y2Ugc3RhZ2UxLnBnZCBhbmQKPj4gc3Rh Z2UyLnBnZCBhcyBhZGRyZXNzIHNwYWNlIGlkZW50aWZpZXJzIGJldHdlZW4gZGlmZmVyZW50IFRM QiBzeXN0ZW1zCj4+IGJhc2VkIG9uIHZtaWQsIGFzaWQuIE15IGxhc3QgcGFydCBvZiBzaWxkZXMg d2lsbCBzaG93IHlvdSBob3cgdG8KPj4gdHJhbnNsYXRlIHN0YWdlMS8yLnBnZCB0byBhcy92bWlk IGluIFBDSSBBVFMgc3lzdGVtIGFuZCB0aGUgbWV0aG9kCj4+IGNvdWxkIHdvcmsgd2l0aCBTTU1V LXYzIGFuZCBpbnRlbCBWdC1kLiAoSXQncyByZWdyZXQgZm9yIG1lIHRoZXJlIGlzCj4+IG5vIHRp bWUgdG8gc2hvdyB5b3UgdGhlIHdob2xlIHNsaWRlcy4pCj4+Cj4+IEluIG91ciBsaWdodCBJT01N VSBpbXBsZW1lbnRhdGlvbiwgdGhlcmUncyBubyBJT1RMQiBpbnZhbGlkYXRlIGRlbGF5Cj4+IHBy b2JsZW0uIEJlY2FzdWUgSU9NTVUgaXMgdmVyeSBjbG9zZSB0byBDUFUgTU1VIGFuZCBpbnRlcmNv bm5lY3Qncwo+PiBkZWxheSBpcyB0aGUgc2FtZSB3aXRoIFNNUCBDUFVzIE1NVSAobm8gUENJLCBW TSBzdXBwb3J0ZWQpLgo+Pgo+PiBUbyBzb2x2ZSB0aGUgcHJvYmxlbSwgd2UgY291bGQgZGVmaW5l IGEgYXN5bmMgbW9kZSBpbiBzZmVuY2Uudm1hLmIgdG8KPj4gc2xvdmUgdGhlIHByb2JsZW0gYW5k IGZpbmlzaGVkIHdpdGggcGVyX2NwdV9pcnEvZXhjZXB0aW9uLgo+Pgo+PiAtLQo+PiBCZXN0IFJl Z2FyZHMKPj4gIEd1byBSZW4KPj4KPj4gTUw6IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xpbnV4 LWNza3kvCgoKCi0tIApCZXN0IFJlZ2FyZHMKIEd1byBSZW4KCk1MOiBodHRwczovL2xvcmUua2Vy bmVsLm9yZy9saW51eC1jc2t5LwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwppb21tdSBtYWlsaW5nIGxpc3QKaW9tbXVAbGlzdHMubGludXgtZm91bmRhdGlv bi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8v aW9tbXU= 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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 180B3C49ED6 for ; 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Sat, 14 Sep 2019 04:50:35 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D395D4A66B; Sat, 14 Sep 2019 04:50:35 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 56FFD4A531 for ; Sat, 14 Sep 2019 04:50:34 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AJvl9bZnzEs0 for ; Sat, 14 Sep 2019 04:49:56 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 07FFA4A66B for ; Sat, 14 Sep 2019 04:49:55 -0400 (EDT) Received: from mail-wr1-f44.google.com (mail-wr1-f44.google.com [209.85.221.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A9E1820717 for ; Sat, 14 Sep 2019 08:49:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568450994; bh=J9o3/Ce1+YLaWOJS+1y9FmaoiXDLsFcat/B4OJD07xQ=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=RxfSgu5Hw2DrWyBoVbDdNSt2Ok1l0HPZkDoIAfVd3MlQhTnhrd+PGF+KRT99kyT3t 4OPt+Hz5Y+lJTpMUHX3i052lOdojgiP4B6aUCHou3Z7QmK557VZCJQU82lYlYa16PZ gw3iMOpieSQO90Rk0eu15z8tSDIhfl/qEDoKs+es= Received: by mail-wr1-f44.google.com with SMTP id q17so29496330wrx.10 for ; Sat, 14 Sep 2019 01:49:54 -0700 (PDT) X-Gm-Message-State: APjAAAXRfPVW2CRJhWs86VA73BFD7wCfR7Wb4hjKJH8QL7oZQ8QKDZFv CpHdJHFR9jK/gwPGU/lRFgJ25nBZY1ADSDPWmgk= X-Google-Smtp-Source: APXvYqxg6MtzWsHNFmLRbH0IHgwRMp+vQZNFO479wjLXexAnH2ZbcUXa06WI/GBB3zidLYAHo44uDXvnrwuUeLiSDAI= X-Received: by 2002:adf:fe0f:: with SMTP id n15mr5204507wrr.343.1568450992705; Sat, 14 Sep 2019 01:49:52 -0700 (PDT) MIME-Version: 1.0 References: <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> <20190619091219.GB7767@fuggles.cambridge.arm.com> <20190619123939.GF7767@fuggles.cambridge.arm.com> <20190624104006.lvm32nahemaqklxc@willie-the-truck> <20190912140256.fwbutgmadpjbjnab@willie-the-truck> In-Reply-To: From: Guo Ren Date: Sat, 14 Sep 2019 16:49:40 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Will Deacon Cc: Catalin Marinas , Palmer Dabbelt , Will Deacon , Atish Patra , Julien Grall , gary@garyguo.net, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Mike Rapoport , Christoph Hellwig , aou@eecs.berkeley.edu, Arnd Bergmann , Marc Zyngier , Paul Walmsley , linux-arm-kernel@lists.infradead.org, Anup Patel , Linux Kernel Mailing List , iommu@lists.linux-foundation.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu SGVyZSBpcyB0aGUgcHJlc2VudGF0aW9uLCBhbnkgY29tbWVudHMgaXMgd2VsY29tZS4KCmh0dHBz Oi8vZG9jcy5nb29nbGUuY29tL3ByZXNlbnRhdGlvbi9kLzFzYzI5NUp6blZBZkRJUGllQXF6amN5 VWtjSG5ORlFzSzhGRnFkb0NZODU0L2VkaXQ/dXNwPXNoYXJpbmcKCk9uIEZyaSwgU2VwIDEzLCAy MDE5IGF0IDM6MTMgUE0gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IHdyb3RlOgo+Cj4gQW5v dGhlciBpZGVhIGlzIHNlcGVyYXRlIHJlbW90ZSBUTEIgaW52YWxpZGF0ZSBpbnRvIHR3byBpbnN0 cnVjdGlvbnM6Cj4KPiAgLSBzZmVuY2Uudm1hLmIuYXN5Ywo+ICAtIHNmZW5jZS52bWEuYi5iYXJy aWVyIC8vIHdhaXQgYWxsIGFzeW5jIFRMQiBpbnZhbGlkYXRlIG9wZXJhdGlvbnMgZmluaXNoZWQg Zm9yIGFsbCBoYXJ0cy4KPgo+IChJIHJlbWVtYmVyIHdobyBtZW50aW9uZWQgbWUgc2VwYXJhdGUg dGhlbSBpbnRvIHR3byBpbnN0cnVjdGlvbnMgYWZ0ZXIgc2Vzc2lvbi4gQW51cD8gSXMgdGhlIGlk ZWEgcmlnaHQgPykKPgo+IEFjdHVhbGx5LCBJIG5ldmVyIGNvbnNpZGVyIGFzeWMgVExCIGludmFs aWRhdGUgYmVmb3JlLCBiZWNhdXNlIGN1cnJlbnQgb3VyIGxpZ2h0IGlvbW11IGRpZCBub3QgbmVl ZCBpdC4KPgo+IFRoeCBhbGwgcGVvcGxlIGF0dGVuZCB0aGUgc2Vzc2lvbiA6KSBMZXQncyBjb250 aW51ZSB0aGUgdGFsay4KPgo+Cj4gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IOS6jiAyMDE5 5bm0OeaciDEy5pel5ZGo5ZubIDIyOjU55YaZ6YGT77yaCj4+Cj4+IFRoeCBXaWxsIGZvciByZXBs eS4KPj4KPj4gT24gVGh1LCBTZXAgMTIsIDIwMTkgYXQgMzowMyBQTSBXaWxsIERlYWNvbiA8d2ls bEBrZXJuZWwub3JnPiB3cm90ZToKPj4gPgo+PiA+IE9uIFN1biwgU2VwIDA4LCAyMDE5IGF0IDA3 OjUyOjU1QU0gKzA4MDAsIEd1byBSZW4gd3JvdGU6Cj4+ID4gPiBPbiBNb24sIEp1biAyNCwgMjAx OSBhdCA2OjQwIFBNIFdpbGwgRGVhY29uIDx3aWxsQGtlcm5lbC5vcmc+IHdyb3RlOgo+PiA+ID4g PiA+IEknbGwga2VlcCBteSBzeXN0ZW0gdXNlIHRoZSBzYW1lIEFTSUQgZm9yIFNNUCArIElPTU1V IDpQCj4+ID4gPiA+Cj4+ID4gPiA+IFlvdSB3aWxsIHdhbnQgYSBzZXBhcmF0ZSBhbGxvY2F0b3Ig Zm9yIHRoYXQ6Cj4+ID4gPiA+Cj4+ID4gPiA+IGh0dHBzOi8vbGttbC5rZXJuZWwub3JnL3IvMjAx OTA2MTAxODQ3MTQuNjc4Ni0yLWplYW4tcGhpbGlwcGUuYnJ1Y2tlckBhcm0uY29tCj4+ID4gPgo+ PiA+ID4gWWVzLCBpdCBpcyBoYXJkIHRvIG1haW50YWluIEFTSUQgYmV0d2VlbiBJT01NVSBhbmQg Q1BVTU1VIG9yIGRpZmZlcmVudAo+PiA+ID4gc3lzdGVtLCBiZWNhdXNlIGl0J3MgZGlmZmljdWx0 IHRvIHN5bmNocm9uaXplIHRoZSBJT19BU0lEIHdoZW4gdGhlIENQVQo+PiA+ID4gQVNJRCBpcyBy b2xsb3Zlci4KPj4gPiA+IEJ1dCB3ZSBjb3VsZCBzdGlsbCB1c2UgaGFyZHdhcmUgYnJvYWRjYXN0 IFRMQiBpbnZhbGlkYXRpb24gaW5zdHJ1Y3Rpb24KPj4gPiA+IHRvIHVuaWZvcm1seSBtYW5hZ2Ug dGhlIEFTSUQgYW5kIElPX0FTSUQsIG9yIE9USEVSX0FTSUQgaW4gb3VyIElPTU1VLgo+PiA+Cj4+ ID4gVGhhdCdzIHByb2JhYmx5IGEgYmFkIGlkZWEsIGJlY2F1c2UgeW91J2xsIGxpa2VseSBzdGFs bCBleGVjdXRpb24gb24gdGhlCj4+ID4gQ1BVIHVudGlsIHRoZSBJT1RMQiBoYXMgY29tcGxldGVk IGludmFsaWRhdGlvbi4gSW4gdGhlIGNhc2Ugb2YgQVRTLCBJIHRoaW5rCj4+ID4gYW4gZW5kcG9p bnQgQVRDIGlzIHBlcm1pdHRlZCB0byB0YWtlIG92ZXIgYSBtaW51dGUgdG8gcmVzcG9uZC4gSW4g cmVhbGl0eSwgSQo+PiA+IHN1c3BlY3QgdGhlIHdvcnN0IHlvdSdsbCBldmVyIHNlZSB3b3VsZCBi ZSBpbiB0aGUgbXNlYyByYW5nZSwgYnV0IHRoYXQncwo+PiA+IHN0aWxsIGFuIHVuYWNjZXB0YWJs ZSBwZXJpb2Qgb2YgdGltZSB0byBob2xkIGEgQ1BVLgo+PiBKdXN0IGFzIEkndmUgc2FpZCBpbiB0 aGUgc2Vzc2lvbiB0aGF0IElPVExCIGludmFsaWRhdGUgZGVsYXkgaXMKPj4gYW5vdGhlciB0b3Bp YywgTXkgbWFpbiBwcm9wb3NhbCBpcyB0byBpbnRyb2R1Y2Ugc3RhZ2UxLnBnZCBhbmQKPj4gc3Rh Z2UyLnBnZCBhcyBhZGRyZXNzIHNwYWNlIGlkZW50aWZpZXJzIGJldHdlZW4gZGlmZmVyZW50IFRM QiBzeXN0ZW1zCj4+IGJhc2VkIG9uIHZtaWQsIGFzaWQuIE15IGxhc3QgcGFydCBvZiBzaWxkZXMg d2lsbCBzaG93IHlvdSBob3cgdG8KPj4gdHJhbnNsYXRlIHN0YWdlMS8yLnBnZCB0byBhcy92bWlk IGluIFBDSSBBVFMgc3lzdGVtIGFuZCB0aGUgbWV0aG9kCj4+IGNvdWxkIHdvcmsgd2l0aCBTTU1V LXYzIGFuZCBpbnRlbCBWdC1kLiAoSXQncyByZWdyZXQgZm9yIG1lIHRoZXJlIGlzCj4+IG5vIHRp bWUgdG8gc2hvdyB5b3UgdGhlIHdob2xlIHNsaWRlcy4pCj4+Cj4+IEluIG91ciBsaWdodCBJT01N VSBpbXBsZW1lbnRhdGlvbiwgdGhlcmUncyBubyBJT1RMQiBpbnZhbGlkYXRlIGRlbGF5Cj4+IHBy b2JsZW0uIEJlY2FzdWUgSU9NTVUgaXMgdmVyeSBjbG9zZSB0byBDUFUgTU1VIGFuZCBpbnRlcmNv bm5lY3Qncwo+PiBkZWxheSBpcyB0aGUgc2FtZSB3aXRoIFNNUCBDUFVzIE1NVSAobm8gUENJLCBW TSBzdXBwb3J0ZWQpLgo+Pgo+PiBUbyBzb2x2ZSB0aGUgcHJvYmxlbSwgd2UgY291bGQgZGVmaW5l IGEgYXN5bmMgbW9kZSBpbiBzZmVuY2Uudm1hLmIgdG8KPj4gc2xvdmUgdGhlIHByb2JsZW0gYW5k IGZpbmlzaGVkIHdpdGggcGVyX2NwdV9pcnEvZXhjZXB0aW9uLgo+Pgo+PiAtLQo+PiBCZXN0IFJl Z2FyZHMKPj4gIEd1byBSZW4KPj4KPj4gTUw6IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xpbnV4 LWNza3kvCgoKCi0tIApCZXN0IFJlZ2FyZHMKIEd1byBSZW4KCk1MOiBodHRwczovL2xvcmUua2Vy bmVsLm9yZy9saW51eC1jc2t5LwpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwprdm1hcm0gbWFpbGluZyBsaXN0Cmt2bWFybUBsaXN0cy5jcy5jb2x1bWJpYS5l ZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJpYS5lZHUvbWFpbG1hbi9saXN0aW5mby9rdm1hcm0K 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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 95F0FC49ED6 for ; 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Sat, 14 Sep 2019 01:49:52 -0700 (PDT) MIME-Version: 1.0 References: <20190321163623.20219-12-julien.grall@arm.com> <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com> <20190619091219.GB7767@fuggles.cambridge.arm.com> <20190619123939.GF7767@fuggles.cambridge.arm.com> <20190624104006.lvm32nahemaqklxc@willie-the-truck> <20190912140256.fwbutgmadpjbjnab@willie-the-truck> In-Reply-To: From: Guo Ren Date: Sat, 14 Sep 2019 16:49:40 +0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file To: Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190914_014957_369580_FBDB2446 X-CRM114-Status: GOOD ( 17.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: julien.thierry@arm.com, Catalin Marinas , Palmer Dabbelt , Will Deacon , christoffer.dall@arm.com, Atish Patra , Julien Grall , gary@garyguo.net, linux-riscv@lists.infradead.org, kvmarm@lists.cs.columbia.edu, Mike Rapoport , Christoph Hellwig , aou@eecs.berkeley.edu, Arnd Bergmann , suzuki.poulose@arm.com, Marc Zyngier , Paul Walmsley , linux-arm-kernel@lists.infradead.org, Anup Patel , Linux Kernel Mailing List , iommu@lists.linux-foundation.org, james.morse@arm.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org SGVyZSBpcyB0aGUgcHJlc2VudGF0aW9uLCBhbnkgY29tbWVudHMgaXMgd2VsY29tZS4KCmh0dHBz Oi8vZG9jcy5nb29nbGUuY29tL3ByZXNlbnRhdGlvbi9kLzFzYzI5NUp6blZBZkRJUGllQXF6amN5 VWtjSG5ORlFzSzhGRnFkb0NZODU0L2VkaXQ/dXNwPXNoYXJpbmcKCk9uIEZyaSwgU2VwIDEzLCAy MDE5IGF0IDM6MTMgUE0gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IHdyb3RlOgo+Cj4gQW5v dGhlciBpZGVhIGlzIHNlcGVyYXRlIHJlbW90ZSBUTEIgaW52YWxpZGF0ZSBpbnRvIHR3byBpbnN0 cnVjdGlvbnM6Cj4KPiAgLSBzZmVuY2Uudm1hLmIuYXN5Ywo+ICAtIHNmZW5jZS52bWEuYi5iYXJy aWVyIC8vIHdhaXQgYWxsIGFzeW5jIFRMQiBpbnZhbGlkYXRlIG9wZXJhdGlvbnMgZmluaXNoZWQg Zm9yIGFsbCBoYXJ0cy4KPgo+IChJIHJlbWVtYmVyIHdobyBtZW50aW9uZWQgbWUgc2VwYXJhdGUg dGhlbSBpbnRvIHR3byBpbnN0cnVjdGlvbnMgYWZ0ZXIgc2Vzc2lvbi4gQW51cD8gSXMgdGhlIGlk ZWEgcmlnaHQgPykKPgo+IEFjdHVhbGx5LCBJIG5ldmVyIGNvbnNpZGVyIGFzeWMgVExCIGludmFs aWRhdGUgYmVmb3JlLCBiZWNhdXNlIGN1cnJlbnQgb3VyIGxpZ2h0IGlvbW11IGRpZCBub3QgbmVl ZCBpdC4KPgo+IFRoeCBhbGwgcGVvcGxlIGF0dGVuZCB0aGUgc2Vzc2lvbiA6KSBMZXQncyBjb250 aW51ZSB0aGUgdGFsay4KPgo+Cj4gR3VvIFJlbiA8Z3VvcmVuQGtlcm5lbC5vcmc+IOS6jiAyMDE5 5bm0OeaciDEy5pel5ZGo5ZubIDIyOjU55YaZ6YGT77yaCj4+Cj4+IFRoeCBXaWxsIGZvciByZXBs eS4KPj4KPj4gT24gVGh1LCBTZXAgMTIsIDIwMTkgYXQgMzowMyBQTSBXaWxsIERlYWNvbiA8d2ls bEBrZXJuZWwub3JnPiB3cm90ZToKPj4gPgo+PiA+IE9uIFN1biwgU2VwIDA4LCAyMDE5IGF0IDA3 OjUyOjU1QU0gKzA4MDAsIEd1byBSZW4gd3JvdGU6Cj4+ID4gPiBPbiBNb24sIEp1biAyNCwgMjAx OSBhdCA2OjQwIFBNIFdpbGwgRGVhY29uIDx3aWxsQGtlcm5lbC5vcmc+IHdyb3RlOgo+PiA+ID4g PiA+IEknbGwga2VlcCBteSBzeXN0ZW0gdXNlIHRoZSBzYW1lIEFTSUQgZm9yIFNNUCArIElPTU1V IDpQCj4+ID4gPiA+Cj4+ID4gPiA+IFlvdSB3aWxsIHdhbnQgYSBzZXBhcmF0ZSBhbGxvY2F0b3Ig Zm9yIHRoYXQ6Cj4+ID4gPiA+Cj4+ID4gPiA+IGh0dHBzOi8vbGttbC5rZXJuZWwub3JnL3IvMjAx OTA2MTAxODQ3MTQuNjc4Ni0yLWplYW4tcGhpbGlwcGUuYnJ1Y2tlckBhcm0uY29tCj4+ID4gPgo+ PiA+ID4gWWVzLCBpdCBpcyBoYXJkIHRvIG1haW50YWluIEFTSUQgYmV0d2VlbiBJT01NVSBhbmQg Q1BVTU1VIG9yIGRpZmZlcmVudAo+PiA+ID4gc3lzdGVtLCBiZWNhdXNlIGl0J3MgZGlmZmljdWx0 IHRvIHN5bmNocm9uaXplIHRoZSBJT19BU0lEIHdoZW4gdGhlIENQVQo+PiA+ID4gQVNJRCBpcyBy b2xsb3Zlci4KPj4gPiA+IEJ1dCB3ZSBjb3VsZCBzdGlsbCB1c2UgaGFyZHdhcmUgYnJvYWRjYXN0 IFRMQiBpbnZhbGlkYXRpb24gaW5zdHJ1Y3Rpb24KPj4gPiA+IHRvIHVuaWZvcm1seSBtYW5hZ2Ug dGhlIEFTSUQgYW5kIElPX0FTSUQsIG9yIE9USEVSX0FTSUQgaW4gb3VyIElPTU1VLgo+PiA+Cj4+ ID4gVGhhdCdzIHByb2JhYmx5IGEgYmFkIGlkZWEsIGJlY2F1c2UgeW91J2xsIGxpa2VseSBzdGFs bCBleGVjdXRpb24gb24gdGhlCj4+ID4gQ1BVIHVudGlsIHRoZSBJT1RMQiBoYXMgY29tcGxldGVk IGludmFsaWRhdGlvbi4gSW4gdGhlIGNhc2Ugb2YgQVRTLCBJIHRoaW5rCj4+ID4gYW4gZW5kcG9p bnQgQVRDIGlzIHBlcm1pdHRlZCB0byB0YWtlIG92ZXIgYSBtaW51dGUgdG8gcmVzcG9uZC4gSW4g cmVhbGl0eSwgSQo+PiA+IHN1c3BlY3QgdGhlIHdvcnN0IHlvdSdsbCBldmVyIHNlZSB3b3VsZCBi ZSBpbiB0aGUgbXNlYyByYW5nZSwgYnV0IHRoYXQncwo+PiA+IHN0aWxsIGFuIHVuYWNjZXB0YWJs ZSBwZXJpb2Qgb2YgdGltZSB0byBob2xkIGEgQ1BVLgo+PiBKdXN0IGFzIEkndmUgc2FpZCBpbiB0 aGUgc2Vzc2lvbiB0aGF0IElPVExCIGludmFsaWRhdGUgZGVsYXkgaXMKPj4gYW5vdGhlciB0b3Bp YywgTXkgbWFpbiBwcm9wb3NhbCBpcyB0byBpbnRyb2R1Y2Ugc3RhZ2UxLnBnZCBhbmQKPj4gc3Rh Z2UyLnBnZCBhcyBhZGRyZXNzIHNwYWNlIGlkZW50aWZpZXJzIGJldHdlZW4gZGlmZmVyZW50IFRM QiBzeXN0ZW1zCj4+IGJhc2VkIG9uIHZtaWQsIGFzaWQuIE15IGxhc3QgcGFydCBvZiBzaWxkZXMg d2lsbCBzaG93IHlvdSBob3cgdG8KPj4gdHJhbnNsYXRlIHN0YWdlMS8yLnBnZCB0byBhcy92bWlk IGluIFBDSSBBVFMgc3lzdGVtIGFuZCB0aGUgbWV0aG9kCj4+IGNvdWxkIHdvcmsgd2l0aCBTTU1V LXYzIGFuZCBpbnRlbCBWdC1kLiAoSXQncyByZWdyZXQgZm9yIG1lIHRoZXJlIGlzCj4+IG5vIHRp bWUgdG8gc2hvdyB5b3UgdGhlIHdob2xlIHNsaWRlcy4pCj4+Cj4+IEluIG91ciBsaWdodCBJT01N VSBpbXBsZW1lbnRhdGlvbiwgdGhlcmUncyBubyBJT1RMQiBpbnZhbGlkYXRlIGRlbGF5Cj4+IHBy b2JsZW0uIEJlY2FzdWUgSU9NTVUgaXMgdmVyeSBjbG9zZSB0byBDUFUgTU1VIGFuZCBpbnRlcmNv bm5lY3Qncwo+PiBkZWxheSBpcyB0aGUgc2FtZSB3aXRoIFNNUCBDUFVzIE1NVSAobm8gUENJLCBW TSBzdXBwb3J0ZWQpLgo+Pgo+PiBUbyBzb2x2ZSB0aGUgcHJvYmxlbSwgd2UgY291bGQgZGVmaW5l IGEgYXN5bmMgbW9kZSBpbiBzZmVuY2Uudm1hLmIgdG8KPj4gc2xvdmUgdGhlIHByb2JsZW0gYW5k IGZpbmlzaGVkIHdpdGggcGVyX2NwdV9pcnEvZXhjZXB0aW9uLgo+Pgo+PiAtLQo+PiBCZXN0IFJl Z2FyZHMKPj4gIEd1byBSZW4KPj4KPj4gTUw6IGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL2xpbnV4 LWNza3kvCgoKCi0tIApCZXN0IFJlZ2FyZHMKIEd1byBSZW4KCk1MOiBodHRwczovL2xvcmUua2Vy bmVsLm9yZy9saW51eC1jc2t5LwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5l bEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4v bGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=