From 2ac0f1621c9be59eebc844fa10361a84fd726185 Mon Sep 17 00:00:00 2001 From: Zhang Yi Date: Fri, 8 Feb 2019 18:10:37 +0800 Subject: util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap besides the existing 'shared' flags, we are going to add 'is_pmem' to qemu_ram_mmap(), which indicated the memory backend file is a persist memory. Signed-off-by: Haozhong Zhang Signed-off-by: Zhang Yi Reviewed-by: Pankaj Gupta Message-Id: <786c46862cfeb253ee0ea2f44d62ffe76edb7fa4.1549555521.git.yi.z.zhang@linux.intel.com> Reviewed-by: Michael S. Tsirkin Reviewed-by: Pankaj Gupta Signed-off-by: Eduardo Habkost --- include/qemu/mmap-alloc.h | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) (limited to 'include/qemu/mmap-alloc.h') diff --git a/include/qemu/mmap-alloc.h b/include/qemu/mmap-alloc.h index ef04f0e..eec98d8 100644 --- a/include/qemu/mmap-alloc.h +++ b/include/qemu/mmap-alloc.h @@ -7,7 +7,26 @@ size_t qemu_fd_getpagesize(int fd); size_t qemu_mempath_getpagesize(const char *mem_path); -void *qemu_ram_mmap(int fd, size_t size, size_t align, bool shared); +/** + * qemu_ram_mmap: mmap the specified file or device. + * + * 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. + * @shared: map has RAM_SHARED flag. + * @is_pmem: map has RAM_PMEM flag. + * + * 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, + bool shared, + bool is_pmem); void qemu_ram_munmap(int fd, void *ptr, size_t size); -- cgit v1.1