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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 C9234C4743E for ; Mon, 7 Jun 2021 02:16:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E397610A2 for ; Mon, 7 Jun 2021 02:16:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230175AbhFGCSe (ORCPT ); Sun, 6 Jun 2021 22:18:34 -0400 Received: from mailgate.ics.forth.gr ([139.91.1.2]:56546 "EHLO mailgate.ics.forth.gr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230136AbhFGCSd (ORCPT ); Sun, 6 Jun 2021 22:18:33 -0400 Received: from av3.ics.forth.gr (av3in.ics.forth.gr [139.91.1.77]) by mailgate.ics.forth.gr (8.15.2/ICS-FORTH/V10-1.8-GATE) with ESMTP id 1572GfeK061577 for ; Mon, 7 Jun 2021 05:16:41 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; d=ics.forth.gr; s=av; c=relaxed/simple; q=dns/txt; i=@ics.forth.gr; t=1623032196; x=1625624196; h=From:Sender:Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=7+nGwPamCaq87hvoY8I/2It3nzp5ksOheQ6kJN1VYpI=; b=g0huyOMuZXFVoaT472uHkr9I43HoImJIsX6gS1eaNwm+W2XryaBiTe0WB5mn+9oY E1O9jOv345s67n5dBeknFFDyEa7EQCm9+MkupJg7qghwhE9Y5oxX78VAos0HXB3h hACLfl8UirfB5cMWySXD2Qw22YQ/phbxk+GsyU1ZyLUckU+LaOE/1aoDDrfv8Cz4 xlpeL6ux75qctc1hX5Hx58evx18mQXSqdsfWkh/dpCcXZ7mzYT6Ycway/+NDaQTb qvE23idBtkXBfjZlEi2g9S+NVejqW4zTIDuphrgNDFHtow2okQymqMDvHT3mHKg+ OVE15kXjyE+LNCP9Ni2wmQ==; X-AuditID: 8b5b014d-962f1700000067b6-83-60bd81842d36 Received: from enigma.ics.forth.gr (webmail.ics.forth.gr [139.91.151.35]) by av3.ics.forth.gr (Symantec Messaging Gateway) with SMTP id 08.AB.26550.4818DB06; Mon, 7 Jun 2021 05:16:36 +0300 (EEST) X-ICS-AUTH-INFO: Authenticated user: at ics.forth.gr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Date: Mon, 07 Jun 2021 05:16:35 +0300 From: Nick Kossifidis To: Guo Ren Cc: Nick Kossifidis , Christoph Hellwig , Drew Fustini , Anup Patel , Palmer Dabbelt , wefu@redhat.com, =?UTF-8?Q?Wei_Wu_?= =?UTF-8?Q?=28=E5=90=B4=E4=BC=9F=29?= , linux-riscv , Linux Kernel Mailing List , linux-arch , linux-sunxi@lists.linux.dev, Guo Ren , Paul Walmsley , Benjamin Koch , Matteo Croce , Wei Fu Subject: Re: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support Organization: FORTH In-Reply-To: References: <1621400656-25678-1-git-send-email-guoren@kernel.org> <20210519052048.GA24853@lst.de> <20210519064435.GA3076809@x1> <20210519065352.GA31590@lst.de> <29733b0931d9dd6a2f0b6919067c7efe@mailhost.ics.forth.gr> Message-ID: X-Sender: mick@mailhost.ics.forth.gr User-Agent: Roundcube Webmail/1.3.16 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrMIsWRmVeSWpSXmKPExsXSHT1dWbelcW+CwcLLKhZPPkxks7i3Yhm7 xYu9jSwWxx/tYrFYufook8WlL9dYLDp2fWWxuLxrDpvFts8tbBZT9u1is7j4az6jRfO7c+wW WzeuY7Rom8VvMWvxbXaL++vOsVm07J/C4iDo8e73MkaPe2+fMHnsnHWX3WPBplKPh5suMXls WtXJ5rHzoaXHr+1HmTw2L6n3eLF5JqPH7psNbB7v911l87jUfJ3d4/MmOY/2A91MAfxRXDYp qTmZZalF+nYJXBlrLl5jL9gpVbG54RxbA+NXkS5GDg4JAROJM9vduxi5OIQEjjFKbJ40kamL kRMobioxe28nI4jNKyAocXLmExYQm1nAQmLqlf2MELa8RPPW2cwgNouAqsScrc3sIDabgKbE /EsHwepFgGp+H+1khaj/zCrR/4AXxBYWsJE4dGU9WJxfQFji092LYDanQKDEufkQ84UENjNL bF0sAHGDi8SEqX1sELepSHz4/YAd5H5RIHvzXKUJjIKzkFw6C8mls5BcuoCReRWjQGKZsV5m crFeWn5RSYZeetEmRnC8MvruYLy9+a3eIUYmDsZDjBIczEoivF4yexKEeFMSK6tSi/Lji0pz UosPMUpzsCiJ8/LqTYgXEkhPLEnNTk0tSC2CyTJxcEo1MNU6JC4RlV5TtspO4USJkvELG0dj puVnw0Li/6j9XZ/f2sXy5OKiSpsJO+pY/Cov8TsGCPPus/6kJzdrm7ucN/Ph5rjv7qnn3Z49 ffXzB19VquSDfS6FszcK7jtX/8SPe/2WzZmfvW67/9u405w3X/2X1i37S2fCPvU1XV56eUpe ay9DQVXiVqcfnzctCKlvPO8nVKl7IvrEgietS+4/Mwyabh38QWGrb23V+WS1mFynZSdC+eZm zOl9LbPO+Y/3lDmfOPgnSLGl2VyewHTqszB3blqZw9SQLf8MWfrUz6jOkE1duEbdWCbh9L23 q+osN2u9dL3wVTlgWWhxxbnsefn5q/US8zIalCslGjlilFiKMxINtZiLihMBQ+jQ5EYDAAA= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Στις 2021-06-07 03:04, Guo Ren έγραψε: > On Mon, Jun 7, 2021 at 2:14 AM Nick Kossifidis > wrote: >> >> Στις 2021-05-20 04:45, Guo Ren έγραψε: >> > On Wed, May 19, 2021 at 2:53 PM Christoph Hellwig wrote: >> >> >> >> On Tue, May 18, 2021 at 11:44:35PM -0700, Drew Fustini wrote: >> >> > This patch series looks like it might be useful for the StarFive JH7100 >> >> > [1] [2] too as it has peripherals on a non-coherent interconnect. GMAC, >> >> > USB and SDIO require that the L2 cache must be manually flushed after >> >> > DMA operations if the data is intended to be shared with U74 cores [2]. >> >> >> >> Not too much, given that the SiFive lineage CPUs have an uncached >> >> window, that is a totally different way to allocate uncached memory. >> > It's a very big MIPS smell. What's the attribute of the uncached >> > window? (uncached + strong-order/ uncached + weak, most vendors still >> > use AXI interconnect, how to deal with a bufferable attribute?) In >> > fact, customers' drivers use different ways to deal with DMA memory in >> > non-coherent SOC. Most riscv SOC vendors are from ARM, so giving them >> > the same way in DMA memory is a smart choice. So using PTE attributes >> > is more suitable. >> > >> > See: >> > https://github.com/riscv/virtual-memory/blob/main/specs/611-virtual-memory-diff.pdf >> > 4.4.1 >> > The draft supports custom attribute bits in PTE. >> > >> >> Not only it doesn't support custom attributes on PTEs: >> >> "Bits63–54 are reserved for future standard use and must be zeroed by >> software for forward compatibility." >> >> It also goes further to say that: >> >> "if any of these bits are set, a page-fault exception is raised" > > In RISC-V VM TG, A C-bit discussion is raised. So it's a comm idea to > support it. > The C-bit was recently dropped, there is a new proposal for Page Based Memory Attributes (PBMT) that we can work on / push for. > Let Linux support custom PTE attributes won't get any side effect in > practice. > > IMO: > We needn't waste a bit in PTE, but the custom idea in PTE reserved > bits is necessary. Because Allwinner D1 needs custom PTE bits in > reserved bits to work around. > So I recommend just remove the "C" bit in PTE, but allow vendors to > define their own PTE attributes in reserved bits. I've found a way to > compact different PTE attributes of different vendors during the Linux > boot stage. That means we still could use One Image for all vendors in > Linux The spec is clear, those attributes are for standard use only, not for custom/platform use. It's one thing to implement custom CMOs where the ISA doesn't have anything for it and doesn't prevent you to do so (so you are not violating anything, it's just a custom extension), and we can hide them behind SBI calls etc, and another to violate the current Privilege Spec by using bits on PTEs that are reserved for standard use only. The intentions of the VM TG are clear, not only those bits are reserved but if software uses them the hw will result a page fault in future revisions of the spec. What's the idea here, to support non-compliant implementations on mainline ? I'm sure you have a good idea on how to make this work, but as long as it violates the spec it can't go in IMHO. 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X-AuditID: 8b5b014d-962f1700000067b6-83-60bd81842d36 Received: from enigma.ics.forth.gr (webmail.ics.forth.gr [139.91.151.35]) by av3.ics.forth.gr (Symantec Messaging Gateway) with SMTP id 08.AB.26550.4818DB06; Mon, 7 Jun 2021 05:16:36 +0300 (EEST) X-ICS-AUTH-INFO: Authenticated user: at ics.forth.gr MIME-Version: 1.0 Date: Mon, 07 Jun 2021 05:16:35 +0300 From: Nick Kossifidis To: Guo Ren Cc: Nick Kossifidis , Christoph Hellwig , Drew Fustini , Anup Patel , Palmer Dabbelt , wefu@redhat.com, =?UTF-8?Q?Wei_Wu_?= =?UTF-8?Q?=28=E5=90=B4=E4=BC=9F=29?= , linux-riscv , Linux Kernel Mailing List , linux-arch , linux-sunxi@lists.linux.dev, Guo Ren , Paul Walmsley , Benjamin Koch , Matteo Croce , Wei Fu Subject: Re: [PATCH RFC 0/3] riscv: Add DMA_COHERENT support Organization: FORTH In-Reply-To: References: <1621400656-25678-1-git-send-email-guoren@kernel.org> <20210519052048.GA24853@lst.de> <20210519064435.GA3076809@x1> <20210519065352.GA31590@lst.de> <29733b0931d9dd6a2f0b6919067c7efe@mailhost.ics.forth.gr> Message-ID: X-Sender: mick@mailhost.ics.forth.gr User-Agent: Roundcube Webmail/1.3.16 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrMIsWRmVeSWpSXmKPExsXSHT1dWbelcW+CwcLLKhZPPkxks7i3Yhm7 xYu9jSwWxx/tYrFYufook8WlL9dYLDp2fWWxuLxrDpvFts8tbBZT9u1is7j4az6jRfO7c+wW WzeuY7Rom8VvMWvxbXaL++vOsVm07J/C4iDo8e73MkaPe2+fMHnsnHWX3WPBplKPh5suMXls WtXJ5rHzoaXHr+1HmTw2L6n3eLF5JqPH7psNbB7v911l87jUfJ3d4/MmOY/2A91MAfxRXDYp qTmZZalF+nYJXBlrLl5jL9gpVbG54RxbA+NXkS5GDg4JAROJM9vduxi5OIQEjjFKbJ40kamL kRMobioxe28nI4jNKyAocXLmExYQm1nAQmLqlf2MELa8RPPW2cwgNouAqsScrc3sIDabgKbE /EsHwepFgGp+H+1khaj/zCrR/4AXxBYWsJE4dGU9WJxfQFji092LYDanQKDEufkQ84UENjNL bF0sAHGDi8SEqX1sELepSHz4/YAd5H5RIHvzXKUJjIKzkFw6C8mls5BcuoCReRWjQGKZsV5m crFeWn5RSYZeetEmRnC8MvruYLy9+a3eIUYmDsZDjBIczEoivF4yexKEeFMSK6tSi/Lji0pz UosPMUpzsCiJ8/LqTYgXEkhPLEnNTk0tSC2CyTJxcEo1MNU6JC4RlV5TtspO4USJkvELG0dj puVnw0Li/6j9XZ/f2sXy5OKiSpsJO+pY/Cov8TsGCPPus/6kJzdrm7ucN/Ph5rjv7qnn3Z49 ffXzB19VquSDfS6FszcK7jtX/8SPe/2WzZmfvW67/9u405w3X/2X1i37S2fCPvU1XV56eUpe ay9DQVXiVqcfnzctCKlvPO8nVKl7IvrEgietS+4/Mwyabh38QWGrb23V+WS1mFynZSdC+eZm zOl9LbPO+Y/3lDmfOPgnSLGl2VyewHTqszB3blqZw9SQLf8MWfrUz6jOkE1duEbdWCbh9L23 q+osN2u9dL3wVTlgWWhxxbnsefn5q/US8zIalCslGjlilFiKMxINtZiLihMBQ+jQ5EYDAAA= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210606_191644_646130_4915E850 X-CRM114-Status: GOOD ( 30.27 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org zqPPhM65z4IgMjAyMS0wNi0wNyAwMzowNCwgR3VvIFJlbiDOrc6zz4HOsc+IzrU6Cj4gT24gTW9u LCBKdW4gNywgMjAyMSBhdCAyOjE0IEFNIE5pY2sgS29zc2lmaWRpcyA8bWlja0BpY3MuZm9ydGgu Z3I+IAo+IHdyb3RlOgo+PiAKPj4gzqPPhM65z4IgMjAyMS0wNS0yMCAwNDo0NSwgR3VvIFJlbiDO rc6zz4HOsc+IzrU6Cj4+ID4gT24gV2VkLCBNYXkgMTksIDIwMjEgYXQgMjo1MyBQTSBDaHJpc3Rv cGggSGVsbHdpZyA8aGNoQGxzdC5kZT4gd3JvdGU6Cj4+ID4+Cj4+ID4+IE9uIFR1ZSwgTWF5IDE4 LCAyMDIxIGF0IDExOjQ0OjM1UE0gLTA3MDAsIERyZXcgRnVzdGluaSB3cm90ZToKPj4gPj4gPiBU aGlzIHBhdGNoIHNlcmllcyBsb29rcyBsaWtlIGl0IG1pZ2h0IGJlIHVzZWZ1bCBmb3IgdGhlIFN0 YXJGaXZlIEpINzEwMAo+PiA+PiA+IFsxXSBbMl0gdG9vIGFzIGl0IGhhcyBwZXJpcGhlcmFscyBv biBhIG5vbi1jb2hlcmVudCBpbnRlcmNvbm5lY3QuIEdNQUMsCj4+ID4+ID4gVVNCIGFuZCBTRElP IHJlcXVpcmUgdGhhdCB0aGUgTDIgY2FjaGUgbXVzdCBiZSBtYW51YWxseSBmbHVzaGVkIGFmdGVy Cj4+ID4+ID4gRE1BIG9wZXJhdGlvbnMgaWYgdGhlIGRhdGEgaXMgaW50ZW5kZWQgdG8gYmUgc2hh cmVkIHdpdGggVTc0IGNvcmVzIFsyXS4KPj4gPj4KPj4gPj4gTm90IHRvbyBtdWNoLCBnaXZlbiB0 aGF0IHRoZSBTaUZpdmUgbGluZWFnZSBDUFVzIGhhdmUgYW4gdW5jYWNoZWQKPj4gPj4gd2luZG93 LCB0aGF0IGlzIGEgdG90YWxseSBkaWZmZXJlbnQgd2F5IHRvIGFsbG9jYXRlIHVuY2FjaGVkIG1l bW9yeS4KPj4gPiBJdCdzIGEgdmVyeSBiaWcgTUlQUyBzbWVsbC4gV2hhdCdzIHRoZSBhdHRyaWJ1 dGUgb2YgdGhlIHVuY2FjaGVkCj4+ID4gd2luZG93PyAodW5jYWNoZWQgKyBzdHJvbmctb3JkZXIv IHVuY2FjaGVkICsgd2VhaywgbW9zdCB2ZW5kb3JzIHN0aWxsCj4+ID4gdXNlIEFYSSBpbnRlcmNv bm5lY3QsIGhvdyB0byBkZWFsIHdpdGggYSBidWZmZXJhYmxlIGF0dHJpYnV0ZT8pIEluCj4+ID4g ZmFjdCwgY3VzdG9tZXJzJyBkcml2ZXJzIHVzZSBkaWZmZXJlbnQgd2F5cyB0byBkZWFsIHdpdGgg RE1BIG1lbW9yeSBpbgo+PiA+IG5vbi1jb2hlcmVudCBTT0MuIE1vc3QgcmlzY3YgU09DIHZlbmRv cnMgYXJlIGZyb20gQVJNLCBzbyBnaXZpbmcgdGhlbQo+PiA+IHRoZSBzYW1lIHdheSBpbiBETUEg bWVtb3J5IGlzIGEgc21hcnQgY2hvaWNlLiBTbyB1c2luZyBQVEUgYXR0cmlidXRlcwo+PiA+IGlz IG1vcmUgc3VpdGFibGUuCj4+ID4KPj4gPiBTZWU6Cj4+ID4gaHR0cHM6Ly9naXRodWIuY29tL3Jp c2N2L3ZpcnR1YWwtbWVtb3J5L2Jsb2IvbWFpbi9zcGVjcy82MTEtdmlydHVhbC1tZW1vcnktZGlm Zi5wZGYKPj4gPiA0LjQuMQo+PiA+IFRoZSBkcmFmdCBzdXBwb3J0cyBjdXN0b20gYXR0cmlidXRl IGJpdHMgaW4gUFRFLgo+PiA+Cj4+IAo+PiBOb3Qgb25seSBpdCBkb2Vzbid0IHN1cHBvcnQgY3Vz dG9tIGF0dHJpYnV0ZXMgb24gUFRFczoKPj4gCj4+ICJCaXRzNjPigJM1NCBhcmUgcmVzZXJ2ZWQg Zm9yIGZ1dHVyZSBzdGFuZGFyZCB1c2UgYW5kIG11c3QgYmUgemVyb2VkIGJ5Cj4+IHNvZnR3YXJl IGZvciBmb3J3YXJkIGNvbXBhdGliaWxpdHkuIgo+PiAKPj4gSXQgYWxzbyBnb2VzIGZ1cnRoZXIg dG8gc2F5IHRoYXQ6Cj4+IAo+PiAiaWYgYW55IG9mIHRoZXNlIGJpdHMgYXJlIHNldCwgYSBwYWdl LWZhdWx0IGV4Y2VwdGlvbiBpcyByYWlzZWQiCj4gCj4gSW4gUklTQy1WIFZNIFRHLCBBIEMtYml0 IGRpc2N1c3Npb24gaXMgcmFpc2VkLiBTbyBpdCdzIGEgY29tbSBpZGVhIHRvCj4gc3VwcG9ydCBp dC4KPiAKClRoZSBDLWJpdCB3YXMgcmVjZW50bHkgZHJvcHBlZCwgdGhlcmUgaXMgYSBuZXcgcHJv cG9zYWwgZm9yIFBhZ2UgQmFzZWQgCk1lbW9yeSBBdHRyaWJ1dGVzIChQQk1UKSB0aGF0IHdlIGNh biB3b3JrIG9uIC8gcHVzaCBmb3IuCgo+IExldCBMaW51eCBzdXBwb3J0IGN1c3RvbSBQVEUgYXR0 cmlidXRlcyB3b24ndCBnZXQgYW55IHNpZGUgZWZmZWN0IGluIAo+IHByYWN0aWNlLgo+IAo+IElN TzoKPiBXZSBuZWVkbid0IHdhc3RlIGEgYml0IGluIFBURSwgYnV0IHRoZSBjdXN0b20gaWRlYSBp biBQVEUgcmVzZXJ2ZWQKPiBiaXRzIGlzIG5lY2Vzc2FyeS4gQmVjYXVzZSBBbGx3aW5uZXIgRDEg bmVlZHMgY3VzdG9tIFBURSBiaXRzIGluCj4gcmVzZXJ2ZWQgYml0cyB0byB3b3JrIGFyb3VuZC4K PiBTbyBJIHJlY29tbWVuZCBqdXN0IHJlbW92ZSB0aGUgIkMiIGJpdCBpbiBQVEUsIGJ1dCBhbGxv dyB2ZW5kb3JzIHRvCj4gZGVmaW5lIHRoZWlyIG93biBQVEUgYXR0cmlidXRlcyBpbiByZXNlcnZl ZCBiaXRzLiBJJ3ZlIGZvdW5kIGEgd2F5IHRvCj4gY29tcGFjdCBkaWZmZXJlbnQgUFRFIGF0dHJp YnV0ZXMgb2YgZGlmZmVyZW50IHZlbmRvcnMgZHVyaW5nIHRoZSBMaW51eAo+IGJvb3Qgc3RhZ2Uu IFRoYXQgbWVhbnMgd2Ugc3RpbGwgY291bGQgdXNlIE9uZSBJbWFnZSBmb3IgYWxsIHZlbmRvcnMg aW4KPiBMaW51eAoKVGhlIHNwZWMgaXMgY2xlYXIsIHRob3NlIGF0dHJpYnV0ZXMgYXJlIGZvciBz dGFuZGFyZCB1c2Ugb25seSwgbm90IGZvciAKY3VzdG9tL3BsYXRmb3JtIHVzZS4gSXQncyBvbmUg dGhpbmcgdG8gaW1wbGVtZW50IGN1c3RvbSBDTU9zIHdoZXJlIHRoZSAKSVNBIGRvZXNuJ3QgaGF2 ZSBhbnl0aGluZyBmb3IgaXQgYW5kIGRvZXNuJ3QgcHJldmVudCB5b3UgdG8gZG8gc28gKHNvIAp5 b3UgYXJlIG5vdCB2aW9sYXRpbmcgYW55dGhpbmcsIGl0J3MganVzdCBhIGN1c3RvbSBleHRlbnNp b24pLCBhbmQgd2UgCmNhbiBoaWRlIHRoZW0gYmVoaW5kIFNCSSBjYWxscyBldGMsIGFuZCBhbm90 aGVyIHRvIHZpb2xhdGUgdGhlIGN1cnJlbnQgClByaXZpbGVnZSBTcGVjIGJ5IHVzaW5nIGJpdHMg b24gUFRFcyB0aGF0IGFyZSByZXNlcnZlZCBmb3Igc3RhbmRhcmQgdXNlIApvbmx5LiBUaGUgaW50 ZW50aW9ucyBvZiB0aGUgVk0gVEcgYXJlIGNsZWFyLCBub3Qgb25seSB0aG9zZSBiaXRzIGFyZSAK cmVzZXJ2ZWQgYnV0IGlmIHNvZnR3YXJlIHVzZXMgdGhlbSB0aGUgaHcgd2lsbCByZXN1bHQgYSBw YWdlIGZhdWx0IGluIApmdXR1cmUgcmV2aXNpb25zIG9mIHRoZSBzcGVjLiBXaGF0J3MgdGhlIGlk ZWEgaGVyZSwgdG8gc3VwcG9ydCAKbm9uLWNvbXBsaWFudCBpbXBsZW1lbnRhdGlvbnMgb24gbWFp bmxpbmUgPyBJJ20gc3VyZSB5b3UgaGF2ZSBhIGdvb2QgCmlkZWEgb24gaG93IHRvIG1ha2UgdGhp cyB3b3JrLCBidXQgYXMgbG9uZyBhcyBpdCB2aW9sYXRlcyB0aGUgc3BlYyBpdCAKY2FuJ3QgZ28g aW4gSU1ITy4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f CmxpbnV4LXJpc2N2IG1haWxpbmcgbGlzdApsaW51eC1yaXNjdkBsaXN0cy5pbmZyYWRlYWQub3Jn Cmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtcmlzY3YK