motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-02 07:13:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

util/userfaultfd: Add uffd_open()

Browse source 
Add a helper to create the uffd handle.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2023-02-01 16:10:54 -05:00 • committed by Juan Quintela
parent d9df92925e
commit d5890ea072
4 changed files with 30 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

12
include/qemu/userfaultfd.h
View file

@ -13,10 +13,20 @@
#ifndef USERFAULTFD_H
#define USERFAULTFD_H
#ifdef CONFIG_LINUX
#include "qemu/osdep.h"
#include "exec/hwaddr.h"
#include <linux/userfaultfd.h>
/**
* uffd_open(): Open an userfaultfd handle for current context.
*
* @flags: The flags we want to pass in when creating the handle.
*
* Returns: the uffd handle if >=0, or <0 if error happens.
*/
int uffd_open(int flags);
int uffd_query_features(uint64_t *features);
int uffd_create_fd(uint64_t features, bool non_blocking);
void uffd_close_fd(int uffd_fd);
@ -32,4 +42,6 @@ int uffd_wakeup(int uffd_fd, void *addr, uint64_t length);
int uffd_read_events(int uffd_fd, struct uffd_msg *msgs, int count);
bool uffd_poll_events(int uffd_fd, int tmo);
#endif /* CONFIG_LINUX */
#endif /* USERFAULTFD_H */