[{"id":1772157,"web_url":"http://patchwork.ozlabs.org/comment/1772157/","msgid":"<20170920184317.GK2449@work-vm>","list_archive_url":null,"date":"2017-09-20T18:43:17","subject":"Re: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header\n\tfor UFFD_FEATURE_*","submitter":{"id":48102,"url":"http://patchwork.ozlabs.org/api/people/48102/","name":"Dr. David Alan Gilbert","email":"dgilbert@redhat.com"},"content":"* Alexey Perevalov (a.perevalov@samsung.com) wrote:\n> This commit adds modification for UFFD_FEATURE_SIGBUS and\n> UFFD_FEATURE_THREAD_ID.\n> \n> Signed-off-by: Alexey Perevalov \n\nThis should be replaced with just running the \n scripts/update-linux-headers.sh\nagainst a 4.14-rc1 checkout.\n\nThat can be done as a separate patch or the first patch\nof this series.\n\nDave\n\n> ---\n> linux-headers/linux/userfaultfd.h | 16 +++++++++++++++-\n> 1 file changed, 15 insertions(+), 1 deletion(-)\n> \n> diff --git a/linux-headers/linux/userfaultfd.h b/linux-headers/linux/userfaultfd.h\n> index 9701772..b43cf0d 100644\n> --- a/linux-headers/linux/userfaultfd.h\n> +++ b/linux-headers/linux/userfaultfd.h\n> @@ -23,7 +23,9 @@\n> \t\t\t UFFD_FEATURE_EVENT_REMOVE |\t\\\n> \t\t\t UFFD_FEATURE_EVENT_UNMAP |\t\t\\\n> \t\t\t UFFD_FEATURE_MISSING_HUGETLBFS |\t\\\n> -\t\t\t UFFD_FEATURE_MISSING_SHMEM)\n> +\t\t\t UFFD_FEATURE_MISSING_SHMEM |\t\t\\\n> +\t\t\t UFFD_FEATURE_SIGBUS |\t\t\\\n> +\t\t\t UFFD_FEATURE_THREAD_ID)\n> #define UFFD_API_IOCTLS\t\t\t\t\\\n> \t((__u64)1 << _UFFDIO_REGISTER |\t\t\\\n> \t (__u64)1 << _UFFDIO_UNREGISTER |\t\\\n> @@ -78,6 +80,9 @@ struct uffd_msg {\n> \t\tstruct {\n> \t\t\t__u64\tflags;\n> \t\t\t__u64\taddress;\n> +\t\t\tunion {\n> +\t\t\t\t__u32 ptid;\n> +\t\t\t} feat;\n> \t\t} pagefault;\n> \n> \t\tstruct {\n> @@ -153,6 +158,13 @@ struct uffdio_api {\n> \t * UFFD_FEATURE_MISSING_SHMEM works the same as\n> \t * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem\n> \t * (i.e. tmpfs and other shmem based APIs).\n> +\t *\n> +\t * UFFD_FEATURE_SIGBUS feature means no page-fault\n> +\t * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead\n> +\t * a SIGBUS signal will be sent to the faulting process.\n> +\t *\n> +\t * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will\n> +\t * be returned, if feature is not requested 0 will be returned.\n> \t */\n> #define UFFD_FEATURE_PAGEFAULT_FLAG_WP\t\t(1<<0)\n> #define UFFD_FEATURE_EVENT_FORK\t\t\t(1<<1)\n> @@ -161,6 +173,8 @@ struct uffdio_api {\n> #define UFFD_FEATURE_MISSING_HUGETLBFS\t\t(1<<4)\n> #define UFFD_FEATURE_MISSING_SHMEM\t\t(1<<5)\n> #define UFFD_FEATURE_EVENT_UNMAP\t\t(1<<6)\n> +#define UFFD_FEATURE_SIGBUS\t\t\t(1<<7)\n> +#define UFFD_FEATURE_THREAD_ID\t\t\t(1<<8)\n> \t__u64 features;\n> \n> \t__u64 ioctls;\n> -- \n> 1.9.1\n> \n--\nDr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; 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Wed, 20 Sep 2017 14:43:28 -0400","from mx1.redhat.com ([209.132.183.28]:33202)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dujy1-0001rC-A9\n\tfor qemu-devel@nongnu.org; Wed, 20 Sep 2017 14:43:25 -0400","from smtp.corp.redhat.com\n\t(int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id C4F66C047B79;\n\tWed, 20 Sep 2017 18:43:23 +0000 (UTC)","from work-vm (ovpn-117-183.ams2.redhat.com [10.36.117.183])\n\tby smtp.corp.redhat.com (Postfix) with ESMTPS id 45CE15D983;\n\tWed, 20 Sep 2017 18:43:20 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com C4F66C047B79","Date":"Wed, 20 Sep 2017 19:43:17 +0100","From":"\"Dr. David Alan Gilbert\" ","To":"Alexey Perevalov ","Message-ID":"<20170920184317.GK2449@work-vm>","References":"<1505839684-10046-1-git-send-email-a.perevalov@samsung.com>\n\t\n\t<1505839684-10046-2-git-send-email-a.perevalov@samsung.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<1505839684-10046-2-git-send-email-a.perevalov@samsung.com>","User-Agent":"Mutt/1.8.3 (2017-05-23)","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.14","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.31]);\n\tWed, 20 Sep 2017 18:43:23 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"Re: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header\n\tfor UFFD_FEATURE_*","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"heetae82.ahn@samsung.com, quintela@redhat.com, qemu-devel@nongnu.org,\n\tpeterx@redhat.com, i.maximets@samsung.com","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"}},{"id":1772493,"web_url":"http://patchwork.ozlabs.org/comment/1772493/","msgid":"<76bfd22d-cba6-9eee-0ece-571d31e9774c@samsung.com>","list_archive_url":null,"date":"2017-09-21T07:33:10","subject":"Re: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header\n\tfor UFFD_FEATURE_*","submitter":{"id":18164,"url":"http://patchwork.ozlabs.org/api/people/18164/","name":"Alexey Perevalov","email":"a.perevalov@samsung.com"},"content":"On 09/20/2017 09:43 PM, Dr. David Alan Gilbert wrote:\n> * Alexey Perevalov (a.perevalov@samsung.com) wrote:\n>> This commit adds modification for UFFD_FEATURE_SIGBUS and\n>> UFFD_FEATURE_THREAD_ID.\n>>\n>> Signed-off-by: Alexey Perevalov \n> This should be replaced with just running the\n> scripts/update-linux-headers.sh\n> against a 4.14-rc1 checkout.\n>\n> That can be done as a separate patch or the first patch\n> of this series.\nOk, in case of separate patch it's reasonably to\nsend modification for all headers.","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; 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Thu, 21 Sep 2017 03:33:20 -0400","from eucas1p2.samsung.com (unknown [182.198.249.207])\n\tby mailout2.w1.samsung.com (KnoxPortal) with ESMTP id\n\t20170921073314euoutp0218700ff700febda292ad5afcbc11bfd3~mUBlLpp6c0191701917euoutp02W;\n\tThu, 21 Sep 2017 07:33:14 +0000 (GMT)","from eusmges1.samsung.com (unknown [203.254.199.239]) by\n\teucas1p1.samsung.com (KnoxPortal) with ESMTP id\n\t20170921073312eucas1p11d0497ec2be59a12802c7f10555e1016~mUBjTqc8s1691116911eucas1p1f;\n\tThu, 21 Sep 2017 07:33:12 +0000 (GMT)","from eucas1p1.samsung.com ( [182.198.249.206]) by\n\teusmges1.samsung.com (EUCPMTA) with SMTP id F8.E3.12576.83B63C95;\n\tThu, 21 Sep 2017 08:33:12 +0100 (BST)","from eusmgms1.samsung.com (unknown [182.198.249.179]) by\n\teucas1p1.samsung.com (KnoxPortal) with ESMTP id\n\t20170921073312eucas1p110c21b15cc7864ba7239fbefd5e3f4ed~mUBirUb7y2385823858eucas1p1k;\n\tThu, 21 Sep 2017 07:33:12 +0000 (GMT)","from eusync4.samsung.com ( [203.254.199.214]) by\n\teusmgms1.samsung.com (EUCPMTA) with SMTP id 21.1B.18832.83B63C95;\n\tThu, 21 Sep 2017 08:33:12 +0100 (BST)","from [106.109.129.199] by eusync4.samsung.com (Oracle\n\tCommunications Messaging Server 7.0.5.31.0 64bit (built May 5 2014))\n\twith ESMTPA id <0OWM00ACGCZBWS80@eusync4.samsung.com>;\n\tThu, 21 Sep 2017 08:33:12 +0100 (BST)"],"X-AuditID":"cbfec7ef-f79ee6d000003120-af-59c36b38d9b6","To":"\"Dr. David Alan Gilbert\" ","From":"Alexey Perevalov ","Message-id":"<76bfd22d-cba6-9eee-0ece-571d31e9774c@samsung.com>","Date":"Thu, 21 Sep 2017 10:33:10 +0300","User-Agent":"Mozilla/5.0 (X11; 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