Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* KVM userfaultfd util
|
|
*
|
|
* Copyright (C) 2018, Red Hat, Inc.
|
|
* Copyright (C) 2019-2022 Google LLC
|
|
*/
|
|
#include <inttypes.h>
|
|
#include <time.h>
|
|
#include <pthread.h>
|
|
#include <linux/userfaultfd.h>
|
|
|
|
#include "test_util.h"
|
|
|
|
typedef int (*uffd_handler_t)(int uffd_mode, int uffd, struct uffd_msg *msg);
|
|
|
|
struct uffd_reader_args {
|
|
int uffd_mode;
|
|
int uffd;
|
|
useconds_t delay;
|
|
uffd_handler_t handler;
|
|
/* Holds the read end of the pipe for killing the reader. */
|
|
int pipe;
|
|
};
|
|
|
|
struct uffd_desc {
|
|
int uffd;
|
|
uint64_t num_readers;
|
|
/* Holds the write ends of the pipes for killing the readers. */
|
|
int *pipefds;
|
|
pthread_t *readers;
|
|
struct uffd_reader_args *reader_args;
|
|
};
|
|
|
|
struct uffd_desc *uffd_setup_demand_paging(int uffd_mode, useconds_t delay,
|
|
void *hva, uint64_t len,
|
|
uint64_t num_readers,
|
|
uffd_handler_t handler);
|
|
|
|
void uffd_stop_demand_paging(struct uffd_desc *uffd);
|
|
|
|
#ifdef PRINT_PER_PAGE_UPDATES
|
|
#define PER_PAGE_DEBUG(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PER_PAGE_DEBUG(...) _no_printf(__VA_ARGS__)
|
|
#endif
|
|
|
|
#ifdef PRINT_PER_VCPU_UPDATES
|
|
#define PER_VCPU_DEBUG(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PER_VCPU_DEBUG(...) _no_printf(__VA_ARGS__)
|
|
#endif
|