211063dc15
Provide the registration callback to call in the Xen's ACPI sleep functionality. This means that during S3/S5 we make a hypercall XENPF_enter_acpi_sleep with the proper PM1A/PM1B registers. Based of Ke Yu's <ke.yu@intel.com> initial idea. [ From http://xenbits.xensource.com/linux-2.6.18-xen.hg change c68699484a65 ] [v1: Added Copyright and license] [v2: Added check if PM1A/B the 16-bits MSB contain something. The spec only uses 16-bits but might have more in future] Signed-off-by: Liang Tang <liang.tang@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/******************************************************************************
|
|
* 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>
|
|
|
|
int xen_acpi_notify_hypervisor_state(u8 sleep_state,
|
|
u32 pm1a_cnt, u32 pm1b_cnt)
|
|
{
|
|
struct xen_platform_op op = {
|
|
.cmd = XENPF_enter_acpi_sleep,
|
|
.interface_version = XENPF_INTERFACE_VERSION,
|
|
.u = {
|
|
.enter_acpi_sleep = {
|
|
.pm1a_cnt_val = (u16)pm1a_cnt,
|
|
.pm1b_cnt_val = (u16)pm1b_cnt,
|
|
.sleep_state = sleep_state,
|
|
},
|
|
},
|
|
};
|
|
|
|
if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) {
|
|
WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!"
|
|
"Email xen-devel@lists.xensource.com Thank you.\n", \
|
|
pm1a_cnt, pm1b_cnt);
|
|
return -1;
|
|
}
|
|
|
|
HYPERVISOR_dom0_op(&op);
|
|
return 1;
|
|
}
|