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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 B374CC33CAA for ; Mon, 25 Nov 2019 23:11:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83F582075C for ; Mon, 25 Nov 2019 23:11:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="MXm3tH8r" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727621AbfKYXLa (ORCPT ); Mon, 25 Nov 2019 18:11:30 -0500 Received: from hqemgate16.nvidia.com ([216.228.121.65]:11426 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727502AbfKYXLH (ORCPT ); Mon, 25 Nov 2019 18:11:07 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 25 Nov 2019 15:11:01 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 25 Nov 2019 15:10:59 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 25 Nov 2019 15:10:59 -0800 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 25 Nov 2019 23:10:59 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 25 Nov 2019 23:10:58 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 25 Nov 2019 15:10:58 -0800 From: John Hubbard To: Andrew Morton CC: Al Viro , Alex Williamson , Benjamin Herrenschmidt , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Christoph Hellwig , Dan Williams , Daniel Vetter , Dave Chinner , David Airlie , "David S . Miller" , Ira Weiny , Jan Kara , Jason Gunthorpe , Jens Axboe , Jonathan Corbet , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Magnus Karlsson , Mauro Carvalho Chehab , Michael Ellerman , Michal Hocko , Mike Kravetz , Paul Mackerras , Shuah Khan , Vlastimil Babka , , , , , , , , , , , , , LKML , John Hubbard Subject: [PATCH v2 16/19] vfio, mm: pin_user_pages (FOLL_PIN) and put_user_page() conversion Date: Mon, 25 Nov 2019 15:10:32 -0800 Message-ID: <20191125231035.1539120-17-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125231035.1539120-1-jhubbard@nvidia.com> References: <20191125231035.1539120-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1574723461; bh=wk2NwG+UPRzhGeGA4o6oMgrCb1pvQrHxv3rBUNt8i3I=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=MXm3tH8rVJNJQZmdv7kCBN3rekKSfBm1lZyzX251DgaU5zTjJTX4715Z14t3cXHsB 1Ye4mKiuIJZS5EDi1zotJwTRA0KWmBkMUasNJcIvU114AwcomfGuhn9dyepVUZFIVV bxuqCisGJXdFsEZGlKdHaD1gTq1B8hMFiOGAP177PcXhrzKcTn6AQxc1VT5t9I6m5X jg2uzSKpFR3k9U6o7GyT4Pp4uQ9dixpaAQaKJrDIan5sxLO/dVuq51zNYA3O2XBuIc 7XSJxoBAUzAZ7pvoxFyJtfeYeQUIB0B5QurdOqWMGV9eqnK1G5bhrevqz2EmVjUxWo nNIGASmzpWTTg== Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 1. Change vfio from get_user_pages_remote(), to pin_user_pages_remote(). 2. Because all FOLL_PIN-acquired pages must be released via put_user_page(), also convert the put_page() call over to put_user_pages_dirty_lock(). Note that this effectively changes the code's behavior in vfio_iommu_type1.c: put_pfn(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Tested-by: Alex Williamson Acked-by: Alex Williamson Signed-off-by: John Hubbard --- drivers/vfio/vfio_iommu_type1.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type= 1.c index b800fc9a0251..18bfc2fc8e6d 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -309,9 +309,8 @@ static int put_pfn(unsigned long pfn, int prot) { if (!is_invalid_reserved_pfn(pfn)) { struct page *page =3D pfn_to_page(pfn); - if (prot & IOMMU_WRITE) - SetPageDirty(page); - put_page(page); + + put_user_pages_dirty_lock(&page, 1, prot & IOMMU_WRITE); return 1; } return 0; @@ -329,7 +328,7 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned= long vaddr, flags |=3D FOLL_WRITE; =20 down_read(&mm->mmap_sem); - ret =3D get_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, + ret =3D pin_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, page, NULL, NULL); if (ret =3D=3D 1) { *pfn =3D page_to_pfn(page[0]); --=20 2.24.0 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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E34D7C432C0 for ; Mon, 25 Nov 2019 23:43:07 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 93F6720733 for ; Mon, 25 Nov 2019 23:43:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="MXm3tH8r" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93F6720733 Authentication-Results: mail.kernel.org; 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Tue, 26 Nov 2019 10:11:05 +1100 (AEDT) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 25 Nov 2019 15:11:01 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 25 Nov 2019 15:10:59 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 25 Nov 2019 15:10:59 -0800 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 25 Nov 2019 23:10:59 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 25 Nov 2019 23:10:58 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Mon, 25 Nov 2019 15:10:58 -0800 From: John Hubbard To: Andrew Morton Subject: [PATCH v2 16/19] vfio, mm: pin_user_pages (FOLL_PIN) and put_user_page() conversion Date: Mon, 25 Nov 2019 15:10:32 -0800 Message-ID: <20191125231035.1539120-17-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125231035.1539120-1-jhubbard@nvidia.com> References: <20191125231035.1539120-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; 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Miller" , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 1. Change vfio from get_user_pages_remote(), to pin_user_pages_remote(). 2. Because all FOLL_PIN-acquired pages must be released via put_user_page(), also convert the put_page() call over to put_user_pages_dirty_lock(). Note that this effectively changes the code's behavior in vfio_iommu_type1.c: put_pfn(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Tested-by: Alex Williamson Acked-by: Alex Williamson Signed-off-by: John Hubbard --- drivers/vfio/vfio_iommu_type1.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type= 1.c index b800fc9a0251..18bfc2fc8e6d 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -309,9 +309,8 @@ static int put_pfn(unsigned long pfn, int prot) { if (!is_invalid_reserved_pfn(pfn)) { struct page *page =3D pfn_to_page(pfn); - if (prot & IOMMU_WRITE) - SetPageDirty(page); - put_page(page); + + put_user_pages_dirty_lock(&page, 1, prot & IOMMU_WRITE); return 1; } return 0; @@ -329,7 +328,7 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned= long vaddr, flags |=3D FOLL_WRITE; =20 down_read(&mm->mmap_sem); - ret =3D get_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, + ret =3D pin_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, page, NULL, NULL); if (ret =3D=3D 1) { *pfn =3D page_to_pfn(page[0]); --=20 2.24.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Hubbard Subject: [PATCH v2 16/19] vfio, mm: pin_user_pages (FOLL_PIN) and put_user_page() conversion Date: Mon, 25 Nov 2019 15:10:32 -0800 Message-ID: <20191125231035.1539120-17-jhubbard@nvidia.com> References: <20191125231035.1539120-1-jhubbard@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20191125231035.1539120-1-jhubbard@nvidia.com> Sender: netdev-owner@vger.kernel.org To: Andrew Morton Cc: Al Viro , Alex Williamson , Benjamin Herrenschmidt , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , Christoph Hellwig , Dan Williams , Daniel Vetter , Dave Chinner , David Airlie , "David S . Miller" , Ira Weiny , Jan Kara , Jason Gunthorpe , Jens Axboe , Jonathan Corbet , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Magnus Karlsson , Mauro Carvalho Chehab , Michael Ellerman M List-Id: dri-devel@lists.freedesktop.org 1. Change vfio from get_user_pages_remote(), to pin_user_pages_remote(). 2. Because all FOLL_PIN-acquired pages must be released via put_user_page(), also convert the put_page() call over to put_user_pages_dirty_lock(). Note that this effectively changes the code's behavior in vfio_iommu_type1.c: put_pfn(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Tested-by: Alex Williamson Acked-by: Alex Williamson Signed-off-by: John Hubbard --- drivers/vfio/vfio_iommu_type1.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type= 1.c index b800fc9a0251..18bfc2fc8e6d 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -309,9 +309,8 @@ static int put_pfn(unsigned long pfn, int prot) { if (!is_invalid_reserved_pfn(pfn)) { struct page *page =3D pfn_to_page(pfn); - if (prot & IOMMU_WRITE) - SetPageDirty(page); - put_page(page); + + put_user_pages_dirty_lock(&page, 1, prot & IOMMU_WRITE); return 1; } return 0; @@ -329,7 +328,7 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned= long vaddr, flags |=3D FOLL_WRITE; =20 down_read(&mm->mmap_sem); - ret =3D get_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, + ret =3D pin_user_pages_remote(NULL, mm, vaddr, 1, flags | FOLL_LONGTERM, page, NULL, NULL); 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Mon, 25 Nov 2019 23:10:59 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 25 Nov 2019 23:10:58 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Mon, 25 Nov 2019 15:10:58 -0800 From: John Hubbard To: Andrew Morton Subject: [PATCH v2 16/19] vfio, mm: pin_user_pages (FOLL_PIN) and put_user_page() conversion Date: Mon, 25 Nov 2019 15:10:32 -0800 Message-ID: <20191125231035.1539120-17-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125231035.1539120-1-jhubbard@nvidia.com> References: <20191125231035.1539120-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1574723461; bh=wk2NwG+UPRzhGeGA4o6oMgrCb1pvQrHxv3rBUNt8i3I=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; 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Miller" , Mike Kravetz Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191125231032.mNRkmdkxEAY5ZrGSmAw43cw656CRy8EWcCJwZQZu0Yg@z> MS4gQ2hhbmdlIHZmaW8gZnJvbSBnZXRfdXNlcl9wYWdlc19yZW1vdGUoKSwgdG8KcGluX3VzZXJf cGFnZXNfcmVtb3RlKCkuCgoyLiBCZWNhdXNlIGFsbCBGT0xMX1BJTi1hY3F1aXJlZCBwYWdlcyBt dXN0IGJlIHJlbGVhc2VkIHZpYQpwdXRfdXNlcl9wYWdlKCksIGFsc28gY29udmVydCB0aGUgcHV0 X3BhZ2UoKSBjYWxsIG92ZXIgdG8KcHV0X3VzZXJfcGFnZXNfZGlydHlfbG9jaygpLgoKTm90ZSB0 aGF0IHRoaXMgZWZmZWN0aXZlbHkgY2hhbmdlcyB0aGUgY29kZSdzIGJlaGF2aW9yIGluCnZmaW9f aW9tbXVfdHlwZTEuYzogcHV0X3BmbigpOiBpdCBub3cgdWx0aW1hdGVseSBjYWxscwpzZXRfcGFn ZV9kaXJ0eV9sb2NrKCksIGluc3RlYWQgb2Ygc2V0X3BhZ2VfZGlydHkoKS4gVGhpcyBpcwpwcm9i YWJseSBtb3JlIGFjY3VyYXRlLgoKQXMgQ2hyaXN0b3BoIEhlbGx3aWcgcHV0IGl0LCAic2V0X3Bh Z2VfZGlydHkoKSBpcyBvbmx5IHNhZmUgaWYgd2UgYXJlCmRlYWxpbmcgd2l0aCBhIGZpbGUgYmFj a2VkIHBhZ2Ugd2hlcmUgd2UgaGF2ZSByZWZlcmVuY2Ugb24gdGhlIGlub2RlIGl0CmhhbmdzIG9m Zi4iIFsxXQoKWzFdIGh0dHBzOi8vbG9yZS5rZXJuZWwub3JnL3IvMjAxOTA3MjMxNTM2NDAuR0I3 MjBAbHN0LmRlCgpUZXN0ZWQtYnk6IEFsZXggV2lsbGlhbXNvbiA8YWxleC53aWxsaWFtc29uQHJl ZGhhdC5jb20+CkFja2VkLWJ5OiBBbGV4IFdpbGxpYW1zb24gPGFsZXgud2lsbGlhbXNvbkByZWRo YXQuY29tPgpTaWduZWQtb2ZmLWJ5OiBKb2huIEh1YmJhcmQgPGpodWJiYXJkQG52aWRpYS5jb20+ Ci0tLQogZHJpdmVycy92ZmlvL3ZmaW9faW9tbXVfdHlwZTEuYyB8IDcgKysrLS0tLQogMSBmaWxl IGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgNCBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9k cml2ZXJzL3ZmaW8vdmZpb19pb21tdV90eXBlMS5jIGIvZHJpdmVycy92ZmlvL3ZmaW9faW9tbXVf dHlwZTEuYwppbmRleCBiODAwZmM5YTAyNTEuLjE4YmZjMmZjOGU2ZCAxMDA2NDQKLS0tIGEvZHJp dmVycy92ZmlvL3ZmaW9faW9tbXVfdHlwZTEuYworKysgYi9kcml2ZXJzL3ZmaW8vdmZpb19pb21t dV90eXBlMS5jCkBAIC0zMDksOSArMzA5LDggQEAgc3RhdGljIGludCBwdXRfcGZuKHVuc2lnbmVk IGxvbmcgcGZuLCBpbnQgcHJvdCkKIHsKIAlpZiAoIWlzX2ludmFsaWRfcmVzZXJ2ZWRfcGZuKHBm bikpIHsKIAkJc3RydWN0IHBhZ2UgKnBhZ2UgPSBwZm5fdG9fcGFnZShwZm4pOwotCQlpZiAocHJv dCAmIElPTU1VX1dSSVRFKQotCQkJU2V0UGFnZURpcnR5KHBhZ2UpOwotCQlwdXRfcGFnZShwYWdl KTsKKworCQlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKCZwYWdlLCAxLCBwcm90ICYgSU9NTVVf V1JJVEUpOwogCQlyZXR1cm4gMTsKIAl9CiAJcmV0dXJuIDA7CkBAIC0zMjksNyArMzI4LDcgQEAg c3RhdGljIGludCB2YWRkcl9nZXRfcGZuKHN0cnVjdCBtbV9zdHJ1Y3QgKm1tLCB1bnNpZ25lZCBs b25nIHZhZGRyLAogCQlmbGFncyB8PSBGT0xMX1dSSVRFOwogCiAJZG93bl9yZWFkKCZtbS0+bW1h cF9zZW0pOwotCXJldCA9IGdldF91c2VyX3BhZ2VzX3JlbW90ZShOVUxMLCBtbSwgdmFkZHIsIDEs IGZsYWdzIHwgRk9MTF9MT05HVEVSTSwKKwlyZXQgPSBwaW5fdXNlcl9wYWdlc19yZW1vdGUoTlVM TCwgbW0sIHZhZGRyLCAxLCBmbGFncyB8IEZPTExfTE9OR1RFUk0sCiAJCQkJICAgIHBhZ2UsIE5V TEwsIE5VTEwpOwogCWlmIChyZXQgPT0gMSkgewogCQkqcGZuID0gcGFnZV90b19wZm4ocGFnZVsw XSk7Ci0tIAoyLjI0LjAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCmRyaS1kZXZlbCBtYWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9w Lm9yZwpodHRwczovL2xpc3RzLmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1k ZXZlbA==