1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2026 Citrix Systems R&D
5 * All rights reserved.
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 #include <sys/cdefs.h>
30 #include "opt_acpi.h"
31 #include <sys/param.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/kobj.h>
35
36 #include <machine/_inttypes.h>
37
38 #include <contrib/dev/acpica/include/acpi.h>
39 #include <contrib/dev/acpica/include/accommon.h>
40
41 #include <dev/acpica/acpivar.h>
42
43 #include <xen/xen-os.h>
44
prepare_sleep_state(uint8_t state,uint32_t a,uint32_t b,bool ext)45 static int prepare_sleep_state(uint8_t state, uint32_t a, uint32_t b, bool ext)
46 {
47 struct xen_platform_op op = {
48 .cmd = XENPF_enter_acpi_sleep,
49 .interface_version = XENPF_INTERFACE_VERSION,
50 .u.enter_acpi_sleep.val_a = a,
51 .u.enter_acpi_sleep.val_b = b,
52 .u.enter_acpi_sleep.sleep_state = state,
53 .u.enter_acpi_sleep.flags =
54 ext ? XENPF_ACPI_SLEEP_EXTENDED : 0,
55 };
56 int error;
57
58 error = HYPERVISOR_platform_op(&op);
59 if (error)
60 printf("Xen notify ACPI sleep failed - "
61 "State %#x A %#x B %#x: %d\n", state, a, b, error);
62
63 return (error ? error : 1);
64 }
65
init_xen_acpi_sleep(void * arg)66 static int init_xen_acpi_sleep(void *arg)
67 {
68 if (!xen_initial_domain())
69 return (0);
70
71 acpi_set_prepare_sleep(&prepare_sleep_state);
72 return (0);
73 }
74
75 SYSINIT(xen_sleep, SI_SUB_CONFIGURE, SI_ORDER_ANY, init_xen_acpi_sleep, NULL);
76