mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 22:34:34 +07:00
be6b25d15f
Use the acpi_os_prepare_extended_sleep() callback to notify xen
to make use of the reduced hardware sleep functionality
The xen hypervisor change underlying this is commit 62d1a69
("ACPI: support v5 (reduced HW) sleep interface") on the master
branch of git://xenbits.xen.org/xen.git.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Acked-by: Konrad Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/******************************************************************************
|
|
* acpi.h
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _XEN_ACPI_H
|
|
#define _XEN_ACPI_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#ifdef CONFIG_XEN_DOM0
|
|
#include <asm/xen/hypervisor.h>
|
|
#include <xen/xen.h>
|
|
#include <linux/acpi.h>
|
|
|
|
#define ACPI_MEMORY_DEVICE_CLASS "memory"
|
|
#define ACPI_MEMORY_DEVICE_HID "PNP0C80"
|
|
#define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device"
|
|
|
|
int xen_stub_memory_device_init(void);
|
|
void xen_stub_memory_device_exit(void);
|
|
|
|
#define ACPI_PROCESSOR_CLASS "processor"
|
|
#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
|
|
#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
|
|
|
|
int xen_stub_processor_init(void);
|
|
void xen_stub_processor_exit(void);
|
|
|
|
void xen_pcpu_hotplug_sync(void);
|
|
int xen_pcpu_id(uint32_t acpi_id);
|
|
|
|
static inline int xen_acpi_get_pxm(acpi_handle h)
|
|
{
|
|
unsigned long long pxm;
|
|
acpi_status status;
|
|
acpi_handle handle;
|
|
acpi_handle phandle = h;
|
|
|
|
do {
|
|
handle = phandle;
|
|
status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
|
|
if (ACPI_SUCCESS(status))
|
|
return pxm;
|
|
status = acpi_get_parent(handle, &phandle);
|
|
} while (ACPI_SUCCESS(status));
|
|
|
|
return -ENXIO;
|
|
}
|
|
|
|
int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
|
|
u32 pm1a_cnt, u32 pm1b_cnd);
|
|
int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
|
|
u32 val_a, u32 val_b);
|
|
|
|
static inline int xen_acpi_suspend_lowlevel(void)
|
|
{
|
|
/*
|
|
* Xen will save and restore CPU context, so
|
|
* we can skip that and just go straight to
|
|
* the suspend.
|
|
*/
|
|
acpi_enter_sleep_state(ACPI_STATE_S3);
|
|
return 0;
|
|
}
|
|
|
|
static inline void xen_acpi_sleep_register(void)
|
|
{
|
|
if (xen_initial_domain()) {
|
|
acpi_os_set_prepare_sleep(
|
|
&xen_acpi_notify_hypervisor_sleep);
|
|
acpi_os_set_prepare_extended_sleep(
|
|
&xen_acpi_notify_hypervisor_extended_sleep);
|
|
|
|
acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
|
|
}
|
|
}
|
|
#else
|
|
static inline void xen_acpi_sleep_register(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _XEN_ACPI_H */
|