forked from luck/tmp_suning_uos_patched
39adc483d3
This patch implement real Xen ACPI cpu hotplug driver as module. When loaded, it replaces Xen stub driver. For booting existed cpus, the driver enumerates them. For hotadded cpus, which added at runtime and notify OS via device or container event, the driver is invoked to add them, parsing cpu information, hypercalling to Xen hypervisor to add them, and finally setting up new /sys interface for them. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/******************************************************************************
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* acpi.h
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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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#ifndef _XEN_ACPI_H
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#define _XEN_ACPI_H
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#include <linux/types.h>
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#ifdef CONFIG_XEN_DOM0
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#include <asm/xen/hypervisor.h>
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#include <xen/xen.h>
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#include <linux/acpi.h>
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#define ACPI_MEMORY_DEVICE_CLASS "memory"
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#define ACPI_MEMORY_DEVICE_HID "PNP0C80"
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#define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device"
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int xen_stub_memory_device_init(void);
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void xen_stub_memory_device_exit(void);
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#define ACPI_PROCESSOR_CLASS "processor"
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#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
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#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
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int xen_stub_processor_init(void);
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void xen_stub_processor_exit(void);
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void xen_pcpu_hotplug_sync(void);
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int xen_pcpu_id(uint32_t acpi_id);
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int xen_acpi_notify_hypervisor_state(u8 sleep_state,
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u32 pm1a_cnt, u32 pm1b_cnd);
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static inline void xen_acpi_sleep_register(void)
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{
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if (xen_initial_domain())
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acpi_os_set_prepare_sleep(
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&xen_acpi_notify_hypervisor_state);
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}
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#else
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static inline void xen_acpi_sleep_register(void)
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{
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}
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#endif
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static inline int xen_acpi_get_pxm(acpi_handle h)
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{
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unsigned long long pxm;
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acpi_status status;
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acpi_handle handle;
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acpi_handle phandle = h;
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do {
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handle = phandle;
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status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
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if (ACPI_SUCCESS(status))
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return pxm;
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status = acpi_get_parent(handle, &phandle);
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} while (ACPI_SUCCESS(status));
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return -ENXIO;
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}
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#endif /* _XEN_ACPI_H */
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