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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>
62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
/******************************************************************************
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* acpi.c
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* acpi file for domain 0 kernel
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*
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* Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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* Copyright (c) 2011 Yu Ke ke.yu@intel.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation; or, when distributed
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* separately from the Linux kernel or incorporated into other
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* software packages, subject to the following license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this source file (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy, modify,
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* merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <xen/acpi.h>
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#include <xen/interface/platform.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/hypervisor.h>
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int xen_acpi_notify_hypervisor_state(u8 sleep_state,
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u32 pm1a_cnt, u32 pm1b_cnt)
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{
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struct xen_platform_op op = {
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.cmd = XENPF_enter_acpi_sleep,
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.interface_version = XENPF_INTERFACE_VERSION,
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.u = {
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.enter_acpi_sleep = {
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.pm1a_cnt_val = (u16)pm1a_cnt,
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.pm1b_cnt_val = (u16)pm1b_cnt,
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.sleep_state = sleep_state,
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},
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},
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};
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if ((pm1a_cnt & 0xffff0000) || (pm1b_cnt & 0xffff0000)) {
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WARN(1, "Using more than 16bits of PM1A/B 0x%x/0x%x!"
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"Email xen-devel@lists.xensource.com Thank you.\n", \
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pm1a_cnt, pm1b_cnt);
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return -1;
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}
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HYPERVISOR_dom0_op(&op);
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return 1;
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}
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