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 xen_acpi_notify_hypervisor_state(u8 sleep_state,u32 val_a,u32 val_b,bool extended)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_dom0_op(&op); 62 return 1; 63 } 64 xen_acpi_notify_hypervisor_sleep(u8 sleep_state,u32 pm1a_cnt,u32 pm1b_cnt)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 xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,u32 val_a,u32 val_b)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 } 78