From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42448) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duLhF-0001Cr-4m for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:48:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duLhB-0006NB-6w for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:48:29 -0400 Received: from mailout1.w1.samsung.com ([210.118.77.11]:33235) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1duLhB-0006LP-0h for qemu-devel@nongnu.org; Tue, 19 Sep 2017 12:48:25 -0400 From: Alexey Perevalov Date: Tue, 19 Sep 2017 19:47:55 +0300 Message-id: <1505839684-10046-2-git-send-email-a.perevalov@samsung.com> In-reply-to: <1505839684-10046-1-git-send-email-a.perevalov@samsung.com> References: <1505839684-10046-1-git-send-email-a.perevalov@samsung.com> Subject: [Qemu-devel] [PATCH v10 01/10] userfault: update kernel header for UFFD_FEATURE_* List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexey Perevalov , i.maximets@samsung.com, peterx@redhat.com, eblake@redhat.com, dgilbert@redhat.com, quintela@redhat.com, heetae82.ahn@samsung.com This commit adds modification for UFFD_FEATURE_SIGBUS and UFFD_FEATURE_THREAD_ID. Signed-off-by: Alexey Perevalov --- linux-headers/linux/userfaultfd.h | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/linux-headers/linux/userfaultfd.h b/linux-headers/linux/userfaultfd.h index 9701772..b43cf0d 100644 --- a/linux-headers/linux/userfaultfd.h +++ b/linux-headers/linux/userfaultfd.h @@ -23,7 +23,9 @@ UFFD_FEATURE_EVENT_REMOVE | \ UFFD_FEATURE_EVENT_UNMAP | \ UFFD_FEATURE_MISSING_HUGETLBFS | \ - UFFD_FEATURE_MISSING_SHMEM) + UFFD_FEATURE_MISSING_SHMEM | \ + UFFD_FEATURE_SIGBUS | \ + UFFD_FEATURE_THREAD_ID) #define UFFD_API_IOCTLS \ ((__u64)1 << _UFFDIO_REGISTER | \ (__u64)1 << _UFFDIO_UNREGISTER | \ @@ -78,6 +80,9 @@ struct uffd_msg { struct { __u64 flags; __u64 address; + union { + __u32 ptid; + } feat; } pagefault; struct { @@ -153,6 +158,13 @@ struct uffdio_api { * UFFD_FEATURE_MISSING_SHMEM works the same as * UFFD_FEATURE_MISSING_HUGETLBFS, but it applies to shmem * (i.e. tmpfs and other shmem based APIs). + * + * UFFD_FEATURE_SIGBUS feature means no page-fault + * (UFFD_EVENT_PAGEFAULT) event will be delivered, instead + * a SIGBUS signal will be sent to the faulting process. + * + * UFFD_FEATURE_THREAD_ID pid of the page faulted task_struct will + * be returned, if feature is not requested 0 will be returned. */ #define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) #define UFFD_FEATURE_EVENT_FORK (1<<1) @@ -161,6 +173,8 @@ struct uffdio_api { #define UFFD_FEATURE_MISSING_HUGETLBFS (1<<4) #define UFFD_FEATURE_MISSING_SHMEM (1<<5) #define UFFD_FEATURE_EVENT_UNMAP (1<<6) +#define UFFD_FEATURE_SIGBUS (1<<7) +#define UFFD_FEATURE_THREAD_ID (1<<8) __u64 features; __u64 ioctls; -- 1.9.1