motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

include: move qemu_msync() to osdep

Browse source 
The implementation depends on the OS. (and longer-term goal is to move
cutils to a common subproject)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220420132624.2439741-21-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2022-04-20 17:26:03 +04:00
parent 8905770b27
commit 73991a9222
5 changed files with 41 additions and 39 deletions
Download patch file Download diff file Expand all files Collapse all files

18
util/oslib-posix.c
View file

@ -950,3 +950,21 @@ int fcntl_setfl(int fd, int flag)
}
return 0;
}
int qemu_msync(void *addr, size_t length, int fd)
{
size_t align_mask = ~(qemu_real_host_page_size() - 1);
/**
* There are no strict reqs as per the length of mapping
* to be synced. Still the length needs to follow the address
* alignment changes. Additionally - round the size to the multiple
* of PAGE_SIZE
*/
length += ((uintptr_t)addr & (qemu_real_host_page_size() - 1));
length = (length + ~align_mask) & align_mask;
addr = (void *)((uintptr_t)addr & align_mask);
return msync(addr, length, MS_SYNC);
}