diff options
author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-12-08 04:32:23 -0500 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-05-07 15:33:18 -0400 |
commit | 211063dc159695bd6072c5393e9bc729481c6ede (patch) | |
tree | 913d21f96fd18746f480701ee45baafab5f114d2 /drivers/xen/acpi.c | |
parent | 1ff2b0c303698e486f1e0886b4d9876200ef8ca5 (diff) |
xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep
Provide the registration callback to call in the Xen's
ACPI sleep functionality. This means that during S3/S5
we make a hypercall XENPF_enter_acpi_sleep with the
proper PM1A/PM1B registers.
Based of Ke Yu's <ke.yu@intel.com> initial idea.
[ From http://xenbits.xensource.com/linux-2.6.18-xen.hg
change c68699484a65 ]
[v1: Added Copyright and license]
[v2: Added check if PM1A/B the 16-bits MSB contain something. The spec
only uses 16-bits but might have more in future]
Signed-off-by: Liang Tang <liang.tang@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/acpi.c')
-rw-r--r-- | drivers/xen/acpi.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/xen/acpi.c b/drivers/xen/acpi.c new file mode 100644 index 000000000000..119d42a2bf57 --- /dev/null +++ b/drivers/xen/acpi.c | |||
@@ -0,0 +1,62 @@ | |||
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 | int xen_acpi_notify_hypervisor_state(u8 sleep_state, | ||
39 | u32 pm1a_cnt, u32 pm1b_cnt) | ||
40 | { | ||
41 | struct xen_platform_op op = { | ||
42 | .cmd = XENPF_enter_acpi_sleep, | ||
43 | .interface_version = XENPF_INTERFACE_VERSION, | ||
44 | .u = { | ||
45 | .enter_acpi_sleep = { | ||
46 | .pm1a_cnt_val = (u16)pm1a_cnt, | ||
47 | .pm1b_cnt_val = (u16)pm1b_cnt, | ||
48 | .sleep_state = sleep_state, | ||
49 | }, | ||
50 | }, | ||
51 | }; | ||
52 | |||
53 | if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) { | ||
54 | WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!" | ||
55 | "Email xen-devel@lists.xensource.com Thank you.\n", \ | ||
56 | pm1a_cnt, pm1b_cnt); | ||
57 | return -1; | ||
58 | } | ||
59 | |||
60 | HYPERVISOR_dom0_op(&op); | ||
61 | return 1; | ||
62 | } | ||