diff options
Diffstat (limited to 'qemu/linux-headers/linux/userfaultfd.h')
| -rw-r--r-- | qemu/linux-headers/linux/userfaultfd.h | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/qemu/linux-headers/linux/userfaultfd.h b/qemu/linux-headers/linux/userfaultfd.h deleted file mode 100644 index 19e845324..000000000 --- a/qemu/linux-headers/linux/userfaultfd.h +++ /dev/null @@ -1,167 +0,0 @@ -/* - * include/linux/userfaultfd.h - * - * Copyright (C) 2007 Davide Libenzi <davidel@xmailserver.org> - * Copyright (C) 2015 Red Hat, Inc. - * - */ - -#ifndef _LINUX_USERFAULTFD_H -#define _LINUX_USERFAULTFD_H - -#include <linux/types.h> - -#define UFFD_API ((__u64)0xAA) -/* - * After implementing the respective features it will become: - * #define UFFD_API_FEATURES (UFFD_FEATURE_PAGEFAULT_FLAG_WP | \ - * UFFD_FEATURE_EVENT_FORK) - */ -#define UFFD_API_FEATURES (0) -#define UFFD_API_IOCTLS \ - ((__u64)1 << _UFFDIO_REGISTER | \ - (__u64)1 << _UFFDIO_UNREGISTER | \ - (__u64)1 << _UFFDIO_API) -#define UFFD_API_RANGE_IOCTLS \ - ((__u64)1 << _UFFDIO_WAKE | \ - (__u64)1 << _UFFDIO_COPY | \ - (__u64)1 << _UFFDIO_ZEROPAGE) - -/* - * Valid ioctl command number range with this API is from 0x00 to - * 0x3F. UFFDIO_API is the fixed number, everything else can be - * changed by implementing a different UFFD_API. If sticking to the - * same UFFD_API more ioctl can be added and userland will be aware of - * which ioctl the running kernel implements through the ioctl command - * bitmask written by the UFFDIO_API. - */ -#define _UFFDIO_REGISTER (0x00) -#define _UFFDIO_UNREGISTER (0x01) -#define _UFFDIO_WAKE (0x02) -#define _UFFDIO_COPY (0x03) -#define _UFFDIO_ZEROPAGE (0x04) -#define _UFFDIO_API (0x3F) - -/* userfaultfd ioctl ids */ -#define UFFDIO 0xAA -#define UFFDIO_API _IOWR(UFFDIO, _UFFDIO_API, \ - struct uffdio_api) -#define UFFDIO_REGISTER _IOWR(UFFDIO, _UFFDIO_REGISTER, \ - struct uffdio_register) -#define UFFDIO_UNREGISTER _IOR(UFFDIO, _UFFDIO_UNREGISTER, \ - struct uffdio_range) -#define UFFDIO_WAKE _IOR(UFFDIO, _UFFDIO_WAKE, \ - struct uffdio_range) -#define UFFDIO_COPY _IOWR(UFFDIO, _UFFDIO_COPY, \ - struct uffdio_copy) -#define UFFDIO_ZEROPAGE _IOWR(UFFDIO, _UFFDIO_ZEROPAGE, \ - struct uffdio_zeropage) - -/* read() structure */ -struct uffd_msg { - __u8 event; - - __u8 reserved1; - __u16 reserved2; - __u32 reserved3; - - union { - struct { - __u64 flags; - __u64 address; - } pagefault; - - struct { - /* unused reserved fields */ - __u64 reserved1; - __u64 reserved2; - __u64 reserved3; - } reserved; - } arg; -} __attribute__((packed)); - -/* - * Start at 0x12 and not at 0 to be more strict against bugs. - */ -#define UFFD_EVENT_PAGEFAULT 0x12 -#if 0 /* not available yet */ -#define UFFD_EVENT_FORK 0x13 -#endif - -/* flags for UFFD_EVENT_PAGEFAULT */ -#define UFFD_PAGEFAULT_FLAG_WRITE (1<<0) /* If this was a write fault */ -#define UFFD_PAGEFAULT_FLAG_WP (1<<1) /* If reason is VM_UFFD_WP */ - -struct uffdio_api { - /* userland asks for an API number and the features to enable */ - __u64 api; - /* - * Kernel answers below with the all available features for - * the API, this notifies userland of which events and/or - * which flags for each event are enabled in the current - * kernel. - * - * Note: UFFD_EVENT_PAGEFAULT and UFFD_PAGEFAULT_FLAG_WRITE - * are to be considered implicitly always enabled in all kernels as - * long as the uffdio_api.api requested matches UFFD_API. - */ -#if 0 /* not available yet */ -#define UFFD_FEATURE_PAGEFAULT_FLAG_WP (1<<0) -#define UFFD_FEATURE_EVENT_FORK (1<<1) -#endif - __u64 features; - - __u64 ioctls; -}; - -struct uffdio_range { - __u64 start; - __u64 len; -}; - -struct uffdio_register { - struct uffdio_range range; -#define UFFDIO_REGISTER_MODE_MISSING ((__u64)1<<0) -#define UFFDIO_REGISTER_MODE_WP ((__u64)1<<1) - __u64 mode; - - /* - * kernel answers which ioctl commands are available for the - * range, keep at the end as the last 8 bytes aren't read. - */ - __u64 ioctls; -}; - -struct uffdio_copy { - __u64 dst; - __u64 src; - __u64 len; - /* - * There will be a wrprotection flag later that allows to map - * pages wrprotected on the fly. And such a flag will be - * available if the wrprotection ioctl are implemented for the - * range according to the uffdio_register.ioctls. - */ -#define UFFDIO_COPY_MODE_DONTWAKE ((__u64)1<<0) - __u64 mode; - - /* - * "copy" is written by the ioctl and must be at the end: the - * copy_from_user will not read the last 8 bytes. - */ - __s64 copy; -}; - -struct uffdio_zeropage { - struct uffdio_range range; -#define UFFDIO_ZEROPAGE_MODE_DONTWAKE ((__u64)1<<0) - __u64 mode; - - /* - * "zeropage" is written by the ioctl and must be at the end: - * the copy_from_user will not read the last 8 bytes. - */ - __s64 zeropage; -}; - -#endif /* _LINUX_USERFAULTFD_H */ |