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/* 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
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