xref: /freebsd/sys/dev/hwt/hwt_thread.h (revision df114daef4c48548c3c2b86717612761185ae18f)
1 /*-
2  * Copyright (c) 2023-2025 Ruslan Bukin <br@bsdpad.com>
3  *
4  * This work was supported by Innovate UK project 105694, "Digital Security
5  * by Design (DSbD) Technology Platform Prototype".
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #ifndef _DEV_HWT_HWT_THREAD_H_
30 #define _DEV_HWT_HWT_THREAD_H_
31 
32 struct hwt_record_entry;
33 
34 struct hwt_thread {
35 	struct hwt_vm			*vm;
36 	struct hwt_context		*ctx;
37 	struct hwt_backend		*backend;
38 	struct thread			*td;
39 	TAILQ_ENTRY(hwt_thread)		next;
40 	int				thread_id;
41 	int				state;
42 #define	HWT_THREAD_STATE_EXITED		(1 << 0)
43 	struct mtx			mtx;
44 	u_int				refcnt;
45 	int				cpu_id; /* last cpu_id */
46 	void				*private; /* backend-specific private data */
47 };
48 
49 /* Thread allocation. */
50 int hwt_thread_alloc(struct hwt_thread **thr0, char *path, size_t bufsize,
51     int kva_req);
52 void hwt_thread_free(struct hwt_thread *thr);
53 
54 /* Thread list mgt. */
55 void hwt_thread_insert(struct hwt_context *ctx, struct hwt_thread *thr, struct hwt_record_entry *entry);
56 struct hwt_thread * hwt_thread_first(struct hwt_context *ctx);
57 struct hwt_thread * hwt_thread_lookup(struct hwt_context *ctx,
58     struct thread *td);
59 
60 #define	HWT_THR_LOCK(thr)		mtx_lock(&(thr)->mtx)
61 #define	HWT_THR_UNLOCK(thr)		mtx_unlock(&(thr)->mtx)
62 #define	HWT_THR_ASSERT_LOCKED(thr)	mtx_assert(&(thr)->mtx, MA_OWNED)
63 
64 #endif /* !_DEV_HWT_HWT_THREAD_H_ */
65