diff options
Diffstat (limited to 'include/xen/gntalloc.h')
-rw-r--r-- | include/xen/gntalloc.h | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/include/xen/gntalloc.h b/include/xen/gntalloc.h deleted file mode 100644 index 76bd580..0000000 --- a/include/xen/gntalloc.h +++ /dev/null @@ -1,82 +0,0 @@ -/****************************************************************************** - * gntalloc.h - * - * Interface to /dev/xen/gntalloc. - * - * Author: Daniel De Graaf <dgdegra@tycho.nsa.gov> - * - * This file is in the public domain. - */ - -#ifndef __LINUX_PUBLIC_GNTALLOC_H__ -#define __LINUX_PUBLIC_GNTALLOC_H__ - -/* - * Allocates a new page and creates a new grant reference. - */ -#define IOCTL_GNTALLOC_ALLOC_GREF \ -_IOC(_IOC_NONE, 'G', 5, sizeof(struct ioctl_gntalloc_alloc_gref)) -struct ioctl_gntalloc_alloc_gref { - /* IN parameters */ - /* The ID of the domain to be given access to the grants. */ - uint16_t domid; - /* Flags for this mapping */ - uint16_t flags; - /* Number of pages to map */ - uint32_t count; - /* OUT parameters */ - /* The offset to be used on a subsequent call to mmap(). */ - uint64_t index; - /* The grant references of the newly created grant, one per page */ - /* Variable size, depending on count */ - uint32_t gref_ids[1]; -}; - -#define GNTALLOC_FLAG_WRITABLE 1 - -/* - * Deallocates the grant reference, allowing the associated page to be freed if - * no other domains are using it. - */ -#define IOCTL_GNTALLOC_DEALLOC_GREF \ -_IOC(_IOC_NONE, 'G', 6, sizeof(struct ioctl_gntalloc_dealloc_gref)) -struct ioctl_gntalloc_dealloc_gref { - /* IN parameters */ - /* The offset returned in the map operation */ - uint64_t index; - /* Number of references to unmap */ - uint32_t count; -}; - -/* - * Sets up an unmap notification within the page, so that the other side can do - * cleanup if this side crashes. Required to implement cross-domain robust - * mutexes or close notification on communication channels. - * - * Each mapped page only supports one notification; multiple calls referring to - * the same page overwrite the previous notification. You must clear the - * notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it - * to occur. - */ -#define IOCTL_GNTALLOC_SET_UNMAP_NOTIFY \ -_IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntalloc_unmap_notify)) -struct ioctl_gntalloc_unmap_notify { - /* IN parameters */ - /* Offset in the file descriptor for a byte within the page (same as - * used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to - * be cleared. Otherwise, it can be any byte in the page whose - * notification we are adjusting. - */ - uint64_t index; - /* Action(s) to take on unmap */ - uint32_t action; - /* Event channel to notify */ - uint32_t event_channel_port; -}; - -/* Clear (set to zero) the byte specified by index */ -#define UNMAP_NOTIFY_CLEAR_BYTE 0x1 -/* Send an interrupt on the indicated event channel */ -#define UNMAP_NOTIFY_SEND_EVENT 0x2 - -#endif /* __LINUX_PUBLIC_GNTALLOC_H__ */ |