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drivers/xen/acpi.c
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/******************************************************************************
* 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.
", \
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);
}
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