1 /******************************************************************************
2 * acpi.c
3 * acpi file for domain 0 kernel
4 *
5 * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
6 * Copyright (c) 2011 Yu Ke ke.yu@intel.com
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation; or, when distributed
11 * separately from the Linux kernel or incorporated into other
12 * software packages, subject to the following license:
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this source file (the "Software"), to deal in the Software without
16 * restriction, including without limitation the rights to use, copy, modify,
17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
18 * and to permit persons to whom the Software is furnished to do so, subject to
19 * the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
30 * IN THE SOFTWARE.
31 */
32
33 #include <xen/acpi.h>
34 #include <xen/interface/platform.h>
35 #include <asm/xen/hypercall.h>
36 #include <asm/xen/hypervisor.h>
37
38 static int xen_acpi_notify_hypervisor_state(u8 sleep_state,
39 u32 val_a, u32 val_b,
40 bool extended)
41 {
42 unsigned int bits = extended ? 8 : 16;
43
44 struct xen_platform_op op = {
45 .cmd = XENPF_enter_acpi_sleep,
46 .interface_version = XENPF_INTERFACE_VERSION,
47 .u.enter_acpi_sleep = {
48 .val_a = (u16)val_a,
49 .val_b = (u16)val_b,
50 .sleep_state = sleep_state,
51 .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0,
52 },
53 };
54
55 if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)),
56 "Using more than %u bits of sleep control values %#x/%#x!"
57 "Email xen-devel@lists.xen.org - Thank you.\n", \
58 bits, val_a, val_b))
59 return -1;
60
61 HYPERVISOR_platform_op(&op);
62 return 1;
63 }
64
65 int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
66 u32 pm1a_cnt, u32 pm1b_cnt)
67 {
68 return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt,
69 pm1b_cnt, false);
70 }
71
72 int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
73 u32 val_a, u32 val_b)
74 {
75 return xen_acpi_notify_hypervisor_state(sleep_state, val_a,
76 val_b, true);
77 }