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#ifndef QEMU_MMAP_ALLOC_H
#define QEMU_MMAP_ALLOC_H
typedef enum {
QEMU_FS_TYPE_UNKNOWN = 0,
QEMU_FS_TYPE_TMPFS,
QEMU_FS_TYPE_HUGETLBFS,
QEMU_FS_TYPE_NUM,
} QemuFsType;
size_t qemu_fd_getpagesize(int fd);
QemuFsType qemu_fd_getfs(int fd);
/**
* qemu_ram_mmap: mmap anonymous memory, the specified file or device.
*
* mmap() abstraction to map guest RAM, simplifying flag handling, taking
* care of alignment requirements and installing guard pages.
*
* Parameters:
* @fd: the file or the device to mmap
* @size: the number of bytes to be mmaped
* @align: if not zero, specify the alignment of the starting mapping address;
* otherwise, the alignment in use will be determined by QEMU.
* @qemu_map_flags: QEMU_MAP_* flags
* @map_offset: map starts at offset of map_offset from the start of fd
*
* Internally, MAP_PRIVATE, MAP_ANONYMOUS and MAP_SHARED_VALIDATE are set
* implicitly based on other parameters.
*
* Return:
* On success, return a pointer to the mapped area.
* On failure, return MAP_FAILED.
*/
void *qemu_ram_mmap(int fd,
size_t size,
size_t align,
uint32_t qemu_map_flags,
off_t map_offset);
void qemu_ram_munmap(int fd, void *ptr, size_t size);
/*
* Abstraction of PROT_ and MAP_ flags as passed to mmap(), for example,
* consumed by qemu_ram_mmap().
*/
/* Map PROT_READ instead of PROT_READ | PROT_WRITE. */
#define QEMU_MAP_READONLY (1 << 0)
/* Use MAP_SHARED instead of MAP_PRIVATE. */
#define QEMU_MAP_SHARED (1 << 1)
/*
* Use MAP_SYNC | MAP_SHARED_VALIDATE if supported. Ignored without
* QEMU_MAP_SHARED. If mapping fails, warn and fallback to !QEMU_MAP_SYNC.
*/
#define QEMU_MAP_SYNC (1 << 2)
/*
* Use MAP_NORESERVE to skip reservation of swap space (or huge pages if
* applicable). Bail out if not supported/effective.
*/
#define QEMU_MAP_NORESERVE (1 << 3)
#endif
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