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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,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 C7FA8C433E0 for ; Fri, 12 Feb 2021 08:36:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4553564DEA for ; Fri, 12 Feb 2021 08:36:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4553564DEA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id D3C816F486 for ; Fri, 12 Feb 2021 08:36:56 +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 xzejGcygxrbg for ; Fri, 12 Feb 2021 08:36:55 +0000 (UTC) Received: by smtp3.osuosl.org (Postfix, from userid 1001) id 531E96F524; Fri, 12 Feb 2021 08:36:55 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTP id 72DF06E56C; Fri, 12 Feb 2021 08:36:52 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 49537C0174; Fri, 12 Feb 2021 08:36:52 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5EB5EC013A for ; Fri, 12 Feb 2021 08:36:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 3EC106E56C for ; Fri, 12 Feb 2021 08:36:51 +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 PmT6LQiYnUON for ; Fri, 12 Feb 2021 08:36:50 +0000 (UTC) Received: by smtp3.osuosl.org (Postfix, from userid 1001) id AD8EF6F486; Fri, 12 Feb 2021 08:36:50 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by smtp3.osuosl.org (Postfix) with ESMTPS id 369E46E56C for ; Fri, 12 Feb 2021 08:36:49 +0000 (UTC) IronPort-SDR: izDVf4CfdDe27Nn+Wot046Prjkq390vubjrup9A/qdjUBhkt/UOWcUEyKDB6aG+yjk6zNde61a +lIfsNxIGXMA== X-IronPort-AV: E=McAfee;i="6000,8403,9892"; a="243872967" X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="243872967" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2021 00:36:46 -0800 IronPort-SDR: QUomUn6GF7IRl2CrcExR/qIj5JqxA0On8b8Z5x0sj+79oToDKfk7epDr3YDf0XgUktQ4MaLR1K mjToj06XNF1g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="490835235" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by fmsmga001.fm.intel.com with ESMTP; 12 Feb 2021 00:36:45 -0800 Received: from orsmsx610.amr.corp.intel.com (10.22.229.23) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:45 -0800 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX610.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:44 -0800 Received: from orsmsx611.amr.corp.intel.com ([10.22.229.24]) by ORSMSX611.amr.corp.intel.com ([10.22.229.24]) with mapi id 15.01.2106.002; Fri, 12 Feb 2021 00:36:44 -0800 From: "Kasireddy, Vivek" To: =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= , "Gerd Hoffmann" Subject: RE: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Topic: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Index: AQHW+gCTpvRVWdGfdEuO7KEMCe95EKpKQvKAgAQvVwCAABxAAIAAXFfggAEm5oCAAH4bcIABCTWAgAKhj6A= Date: Fri, 12 Feb 2021 08:36:44 +0000 Message-ID: References: <20210203073517.1908882-1-vivek.kasireddy@intel.com> <20210203073517.1908882-3-vivek.kasireddy@intel.com> <20210208075748.xejgcb4il2egow2u@sirius.home.kraxel.org> <8ba4ad64be3546bda9a2ed2129bf98e4@intel.com> <20210209084453.5oqepy7zdwtxgrpu@sirius.home.kraxel.org> <2ef01dc941684a15a4f30e6239ae42df@intel.com> <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> In-Reply-To: <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.5.1.3 dlp-reaction: no-action x-originating-ip: [10.22.254.132] MIME-Version: 1.0 Cc: "Kim, Dongwon" , "daniel.vetter@ffwll.ch" , "dri-devel@lists.freedesktop.org" , "virtualization@lists.linux-foundation.org" , Daniel Vetter , "Vetter, Daniel" , "sumit.semwal@linaro.org" , "linux-media@vger.kernel.org" X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Hi Christian, > > Hi Vivek, > > > [Kasireddy, Vivek] What if I do mmap() on the fd followed by mlock() > > or mmap() followed by get_user_pages()? If it still fails, would > > ioremapping the device memory and poking at the backing storage be an > > option? Or, if I bind the passthrough'd GPU device to vfio-pci and tap > > into the memory region associated with the device memory, can it be made to work? > > get_user_pages() is not allowed on mmaped DMA-bufs in the first place. > > Daniel is currently adding code to make sure that this is never ever used. > > > And, I noticed that for PFNs that do not have valid struct page > > associated with it, KVM does a memremap() to access/map them. Is this an option? > > No, even for system memory which has a valid struct page touching it when it is part of a > DMA-buf is illegal since the reference count and mapping fields in struct page might be > used for something different. > > Keep in mind that struct page is a heavily overloaded structure for different use cases. You > can't just use it for a different use case than what the owner of the page has intended it. [Kasireddy, Vivek] What is your recommended/acceptable way for doing what I am trying to do? Thanks, Vivek > > Regards, > Christian. > > > > > > > Thanks, > > Vivek > >> take care, > >> Gerd _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization 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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,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 7D14BC433E0 for ; Fri, 12 Feb 2021 08:36:49 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 269C164DEA for ; Fri, 12 Feb 2021 08:36:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 269C164DEA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 19FED6E544; Fri, 12 Feb 2021 08:36:48 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id EE7C36E544 for ; Fri, 12 Feb 2021 08:36:46 +0000 (UTC) IronPort-SDR: aaDmxSAzIlJFVnI9Ks/tXqO4aTYFzD/ExnUMSwzih8rtylpNu/ni/X82Y6UAiLRrWiFUHXQsbE 1MT22G2z7TOw== X-IronPort-AV: E=McAfee;i="6000,8403,9892"; a="246446439" X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="246446439" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2021 00:36:46 -0800 IronPort-SDR: QUomUn6GF7IRl2CrcExR/qIj5JqxA0On8b8Z5x0sj+79oToDKfk7epDr3YDf0XgUktQ4MaLR1K mjToj06XNF1g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="490835235" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by fmsmga001.fm.intel.com with ESMTP; 12 Feb 2021 00:36:45 -0800 Received: from orsmsx610.amr.corp.intel.com (10.22.229.23) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:45 -0800 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX610.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:44 -0800 Received: from orsmsx611.amr.corp.intel.com ([10.22.229.24]) by ORSMSX611.amr.corp.intel.com ([10.22.229.24]) with mapi id 15.01.2106.002; Fri, 12 Feb 2021 00:36:44 -0800 From: "Kasireddy, Vivek" To: =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= , "Gerd Hoffmann" Subject: RE: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Topic: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Index: AQHW+gCTpvRVWdGfdEuO7KEMCe95EKpKQvKAgAQvVwCAABxAAIAAXFfggAEm5oCAAH4bcIABCTWAgAKhj6A= Date: Fri, 12 Feb 2021 08:36:44 +0000 Message-ID: References: <20210203073517.1908882-1-vivek.kasireddy@intel.com> <20210203073517.1908882-3-vivek.kasireddy@intel.com> <20210208075748.xejgcb4il2egow2u@sirius.home.kraxel.org> <8ba4ad64be3546bda9a2ed2129bf98e4@intel.com> <20210209084453.5oqepy7zdwtxgrpu@sirius.home.kraxel.org> <2ef01dc941684a15a4f30e6239ae42df@intel.com> <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> In-Reply-To: <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.5.1.3 dlp-reaction: no-action x-originating-ip: [10.22.254.132] MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Kim, Dongwon" , "daniel.vetter@ffwll.ch" , "dri-devel@lists.freedesktop.org" , "virtualization@lists.linux-foundation.org" , "Vetter, Daniel" , "linux-media@vger.kernel.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Christian, > > Hi Vivek, > > > [Kasireddy, Vivek] What if I do mmap() on the fd followed by mlock() > > or mmap() followed by get_user_pages()? If it still fails, would > > ioremapping the device memory and poking at the backing storage be an > > option? Or, if I bind the passthrough'd GPU device to vfio-pci and tap > > into the memory region associated with the device memory, can it be made to work? > > get_user_pages() is not allowed on mmaped DMA-bufs in the first place. > > Daniel is currently adding code to make sure that this is never ever used. > > > And, I noticed that for PFNs that do not have valid struct page > > associated with it, KVM does a memremap() to access/map them. Is this an option? > > No, even for system memory which has a valid struct page touching it when it is part of a > DMA-buf is illegal since the reference count and mapping fields in struct page might be > used for something different. > > Keep in mind that struct page is a heavily overloaded structure for different use cases. You > can't just use it for a different use case than what the owner of the page has intended it. [Kasireddy, Vivek] What is your recommended/acceptable way for doing what I am trying to do? Thanks, Vivek > > Regards, > Christian. > > > > > > > Thanks, > > Vivek > >> take care, > >> Gerd _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel 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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,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 264F4C433E0 for ; Fri, 12 Feb 2021 08:37:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E9C8464DEA for ; Fri, 12 Feb 2021 08:37:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229905AbhBLIhb (ORCPT ); Fri, 12 Feb 2021 03:37:31 -0500 Received: from mga04.intel.com ([192.55.52.120]:58166 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229771AbhBLIh1 (ORCPT ); Fri, 12 Feb 2021 03:37:27 -0500 IronPort-SDR: lfwe3S1c2v6oTsF1bzYcRPbzvDOqU1B8NUGUoCpYoIpGxCRng6wivato+MjBCwKB8sIcI8nku2 Papg14MLSzAg== X-IronPort-AV: E=McAfee;i="6000,8403,9892"; a="179823402" X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="179823402" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Feb 2021 00:36:46 -0800 IronPort-SDR: QUomUn6GF7IRl2CrcExR/qIj5JqxA0On8b8Z5x0sj+79oToDKfk7epDr3YDf0XgUktQ4MaLR1K mjToj06XNF1g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,173,1610438400"; d="scan'208";a="490835235" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by fmsmga001.fm.intel.com with ESMTP; 12 Feb 2021 00:36:45 -0800 Received: from orsmsx610.amr.corp.intel.com (10.22.229.23) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:45 -0800 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX610.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2; Fri, 12 Feb 2021 00:36:44 -0800 Received: from orsmsx611.amr.corp.intel.com ([10.22.229.24]) by ORSMSX611.amr.corp.intel.com ([10.22.229.24]) with mapi id 15.01.2106.002; Fri, 12 Feb 2021 00:36:44 -0800 From: "Kasireddy, Vivek" To: =?utf-8?B?Q2hyaXN0aWFuIEvDtm5pZw==?= , "Gerd Hoffmann" CC: Daniel Vetter , "virtualization@lists.linux-foundation.org" , "dri-devel@lists.freedesktop.org" , "Vetter, Daniel" , "daniel.vetter@ffwll.ch" , "Kim, Dongwon" , "sumit.semwal@linaro.org" , "linux-media@vger.kernel.org" Subject: RE: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Topic: [RFC v3 2/3] virtio: Introduce Vdmabuf driver Thread-Index: AQHW+gCTpvRVWdGfdEuO7KEMCe95EKpKQvKAgAQvVwCAABxAAIAAXFfggAEm5oCAAH4bcIABCTWAgAKhj6A= Date: Fri, 12 Feb 2021 08:36:44 +0000 Message-ID: References: <20210203073517.1908882-1-vivek.kasireddy@intel.com> <20210203073517.1908882-3-vivek.kasireddy@intel.com> <20210208075748.xejgcb4il2egow2u@sirius.home.kraxel.org> <8ba4ad64be3546bda9a2ed2129bf98e4@intel.com> <20210209084453.5oqepy7zdwtxgrpu@sirius.home.kraxel.org> <2ef01dc941684a15a4f30e6239ae42df@intel.com> <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> In-Reply-To: <8ac10b1d-3d64-4e39-42e6-6c65b61f0794@amd.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.5.1.3 dlp-reaction: no-action x-originating-ip: [10.22.254.132] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org SGkgQ2hyaXN0aWFuLA0KDQo+IA0KPiBIaSBWaXZlaywNCj4gDQo+ID4gW0thc2lyZWRkeSwgVml2 ZWtdIFdoYXQgaWYgSSBkbyBtbWFwKCkgb24gdGhlIGZkIGZvbGxvd2VkIGJ5IG1sb2NrKCkNCj4g PiBvciBtbWFwKCkgZm9sbG93ZWQgYnkgZ2V0X3VzZXJfcGFnZXMoKT8gSWYgaXQgc3RpbGwgZmFp bHMsIHdvdWxkDQo+ID4gaW9yZW1hcHBpbmcgdGhlIGRldmljZSBtZW1vcnkgYW5kIHBva2luZyBh dCB0aGUgYmFja2luZyBzdG9yYWdlIGJlIGFuDQo+ID4gb3B0aW9uPyBPciwgaWYgSSBiaW5kIHRo ZSBwYXNzdGhyb3VnaCdkIEdQVSBkZXZpY2UgdG8gdmZpby1wY2kgYW5kIHRhcA0KPiA+IGludG8g dGhlIG1lbW9yeSByZWdpb24gYXNzb2NpYXRlZCB3aXRoIHRoZSBkZXZpY2UgbWVtb3J5LCBjYW4g aXQgYmUgbWFkZSB0byB3b3JrPw0KPiANCj4gZ2V0X3VzZXJfcGFnZXMoKSBpcyBub3QgYWxsb3dl ZCBvbiBtbWFwZWQgRE1BLWJ1ZnMgaW4gdGhlIGZpcnN0IHBsYWNlLg0KPiANCj4gRGFuaWVsIGlz IGN1cnJlbnRseSBhZGRpbmcgY29kZSB0byBtYWtlIHN1cmUgdGhhdCB0aGlzIGlzIG5ldmVyIGV2 ZXIgdXNlZC4NCj4gDQo+ID4gQW5kLCBJIG5vdGljZWQgdGhhdCBmb3IgUEZOcyB0aGF0IGRvIG5v dCBoYXZlIHZhbGlkIHN0cnVjdCBwYWdlDQo+ID4gYXNzb2NpYXRlZCB3aXRoIGl0LCBLVk0gZG9l cyBhIG1lbXJlbWFwKCkgdG8gYWNjZXNzL21hcCB0aGVtLiBJcyB0aGlzIGFuIG9wdGlvbj8NCj4g DQo+IE5vLCBldmVuIGZvciBzeXN0ZW0gbWVtb3J5IHdoaWNoIGhhcyBhIHZhbGlkIHN0cnVjdCBw YWdlIHRvdWNoaW5nIGl0IHdoZW4gaXQgaXMgcGFydCBvZiBhDQo+IERNQS1idWYgaXMgaWxsZWdh bCBzaW5jZSB0aGUgcmVmZXJlbmNlIGNvdW50IGFuZCBtYXBwaW5nIGZpZWxkcyBpbiBzdHJ1Y3Qg cGFnZSBtaWdodCBiZQ0KPiB1c2VkIGZvciBzb21ldGhpbmcgZGlmZmVyZW50Lg0KPiANCj4gS2Vl cCBpbiBtaW5kIHRoYXQgc3RydWN0IHBhZ2UgaXMgYSBoZWF2aWx5IG92ZXJsb2FkZWQgc3RydWN0 dXJlIGZvciBkaWZmZXJlbnQgdXNlIGNhc2VzLiBZb3UNCj4gY2FuJ3QganVzdCB1c2UgaXQgZm9y IGEgZGlmZmVyZW50IHVzZSBjYXNlIHRoYW4gd2hhdCB0aGUgb3duZXIgb2YgdGhlIHBhZ2UgaGFz IGludGVuZGVkIGl0Lg0KW0thc2lyZWRkeSwgVml2ZWtdIFdoYXQgaXMgeW91ciByZWNvbW1lbmRl ZC9hY2NlcHRhYmxlIHdheSBmb3IgZG9pbmcgd2hhdCBJIGFtIHRyeWluZyB0byANCmRvPw0KDQpU aGFua3MsDQpWaXZlaw0KDQo+IA0KPiBSZWdhcmRzLA0KPiBDaHJpc3RpYW4uDQo+IA0KPiA+DQo+ ID4NCj4gPiBUaGFua3MsDQo+ID4gVml2ZWsNCj4gPj4gdGFrZSBjYXJlLA0KPiA+PiAgICBHZXJk DQoNCg==