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https://github.com/projectacrn/acrn-hypervisor.git
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26a2aed19d
Create an intx.py which is a static allocator to allocate the irq resources. The available irq list is based on the native irqs which are in range [0, 15] and are not used by native os. Tracked-On: #5980 Signed-off-by: Yang,Yu-chu <yu-chu.yang@intel.com> Reviewed-by: Junjie Mao <junjie.mao@intel.com>
72 lines
3.0 KiB
Python
72 lines
3.0 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (C) 2021 Intel Corporation. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import sys, os
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sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), '..', 'library'))
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import common, board_cfg_lib, lib.error, lib.lib
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LEGACY_IRQ_MAX = 16
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def get_native_valid_irq():
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"""
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This is get available irq from board info file
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:return: native available irq list
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"""
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val_irq = []
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irq_info_lines = board_cfg_lib.get_info(common.BOARD_INFO_FILE, "<AVAILABLE_IRQ_INFO>", "</AVAILABLE_IRQ_INFO>")
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for irq_string in irq_info_lines:
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val_irq = [int(x.strip()) for x in irq_string.split(',')]
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return val_irq
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def alloc_irq(irq_list):
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try:
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irq = irq_list[0]
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remove_irq(irq_list, irq)
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return irq
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except IndexError as e:
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raise lib.error.ResourceError("Cannot allocate legacy irq, the available legacy irq list: {}, {}".format(e, irq_list)) from e
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def remove_irq(irq_list, irq):
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try:
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irq_list.remove(irq)
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except ValueError as e:
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raise ValueError("Cannot remove irq:{} from available legacy irq list:{}, {}". format(irq, e, irq_list)) from e
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def create_vuart_irq_node(etree, vm_id, vuart_id, irq):
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allocation_sos_vm_node = common.get_node(f"/acrn-config/vm[@id = '{vm_id}']", etree)
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if allocation_sos_vm_node is None:
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allocation_sos_vm_node = common.append_node("/acrn-config/vm", None, etree, id = vm_id)
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if common.get_node("./vm_type", allocation_sos_vm_node) is None:
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common.append_node("./vm_type", "SOS_VM", allocation_sos_vm_node)
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if common.get_node(f"./legacy_vuart[@id = '{vuart_id}']", allocation_sos_vm_node) is None:
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common.append_node("./legacy_vuart", None, allocation_sos_vm_node, id = vuart_id)
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common.append_node(f"./legacy_vuart[@id = '{vuart_id}']/irq", irq, allocation_sos_vm_node)
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def fn(board_etree, scenario_etree, allocation_etree):
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irq_list = get_native_valid_irq()
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hv_debug_console = lib.lib.parse_hv_console(scenario_etree)
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native_ttys = lib.lib.get_native_ttys()
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vuart_valid = ['ttyS0', 'ttyS1', 'ttyS2', 'ttyS3']
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scenario_sos_vm_node = common.get_node("//vm[vm_type = 'SOS_VM']", scenario_etree)
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if scenario_sos_vm_node is not None:
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vm_id = common.get_node("./@id", scenario_sos_vm_node)
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if common.get_node("./legacy_vuart[@id = '0']/base/text()", scenario_sos_vm_node) != "INVALID_COM_BASE":
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vuart0_irq = -1
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if hv_debug_console in vuart_valid and hv_debug_console in native_ttys.keys() and native_ttys[hv_debug_console]['irq'] < LEGACY_IRQ_MAX:
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vuart0_irq = native_ttys[hv_debug_console]['irq']
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else:
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vuart0_irq = alloc_irq(irq_list)
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create_vuart_irq_node(allocation_etree, vm_id, "0", vuart0_irq)
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if common.get_node("./legacy_vuart[@id = '1']/base/text()", scenario_sos_vm_node) != "INVALID_COM_BASE":
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vuart1_irq = alloc_irq(irq_list)
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create_vuart_irq_node(allocation_etree, vm_id, "1", vuart1_irq)
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