| /****************************************************************************** | |
| * acpi.c | |
| * acpi file for domain 0 kernel | |
| * | |
| * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | |
| * Copyright (c) 2011 Yu Ke ke.yu@intel.com | |
| * | |
| * This program is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU General Public License version 2 | |
| * as published by the Free Software Foundation; or, when distributed | |
| * separately from the Linux kernel or incorporated into other | |
| * software packages, subject to the following license: | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| * of this source file (the "Software"), to deal in the Software without | |
| * restriction, including without limitation the rights to use, copy, modify, | |
| * merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
| * and to permit persons to whom the Software is furnished to do so, subject to | |
| * the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in | |
| * all copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
| * IN THE SOFTWARE. | |
| */ | |
| #include <xen/acpi.h> | |
| #include <xen/interface/platform.h> | |
| #include <asm/xen/hypercall.h> | |
| #include <asm/xen/hypervisor.h> | |
| static int xen_acpi_notify_hypervisor_state(u8 sleep_state, | |
| u32 val_a, u32 val_b, | |
| bool extended) | |
| { | |
| unsigned int bits = extended ? 8 : 16; | |
| struct xen_platform_op op = { | |
| .cmd = XENPF_enter_acpi_sleep, | |
| .interface_version = XENPF_INTERFACE_VERSION, | |
| .u.enter_acpi_sleep = { | |
| .val_a = (u16)val_a, | |
| .val_b = (u16)val_b, | |
| .sleep_state = sleep_state, | |
| .flags = extended ? XENPF_ACPI_SLEEP_EXTENDED : 0, | |
| }, | |
| }; | |
| if (WARN((val_a & (~0 << bits)) || (val_b & (~0 << bits)), | |
| "Using more than %u bits of sleep control values %#x/%#x!" | |
| "Email xen-devel@lists.xen.org - Thank you.\n", \ | |
| bits, val_a, val_b)) | |
| return -1; | |
| HYPERVISOR_platform_op(&op); | |
| return 1; | |
| } | |
| int xen_acpi_notify_hypervisor_sleep(u8 sleep_state, | |
| u32 pm1a_cnt, u32 pm1b_cnt) | |
| { | |
| return xen_acpi_notify_hypervisor_state(sleep_state, pm1a_cnt, | |
| pm1b_cnt, false); | |
| } | |
| int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state, | |
| u32 val_a, u32 val_b) | |
| { | |
| return xen_acpi_notify_hypervisor_state(sleep_state, val_a, | |
| val_b, true); | |
| } |