| /****************************************************************************** |
| * 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); |
| } |