drivers/xen/acpi.c

   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 }