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https://github.com/projectacrn/acrn-hypervisor.git
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2045577f12
"S5" is one of the ACPI sleep states which means the function to shut down the VMs. On ACRN, the User VM must be shut down before powering off the Service VM, so we need a vUART channel to communicate between the Service VM and User VMs. This patch adds a vUART channel for each User VM connect to Service VM Tracked-On: #8782 Signed-off-by: Chenli Wei <chenli.wei@intel.com> Reviewed-by: Junjie Mao <junjie.mao@intel.com>
91 lines
3.8 KiB
Python
91 lines
3.8 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (C) 2022 Intel Corporation.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import sys
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import common, lib.error
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standard_uart_port = ['0x3F8', '0x2F8', '0x3E8', '0x2E8']
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# The COM1 was used for console vUART, so we alloc io_port frome COM2~COM4
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service_port_list = list(range(0x9000, 0x9100, 8))
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def create_s5_vuart_connection(allocation_etree, service_vm_name, service_vm_port, user_vm_name, user_vm_port):
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vuart_connections_node = common.get_node(f"/acrn-config/hv/vuart_connections", allocation_etree)
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if vuart_connections_node is None:
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vuart_connections_node = common.append_node("/acrn-config/hv/vuart_connections", None, allocation_etree)
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connection_name = service_vm_name + "_" + user_vm_name
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vuart_connection_node = common.append_node(f"./vuart_connection", None, vuart_connections_node)
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common.append_node(f"./name", connection_name, vuart_connection_node)
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common.append_node(f"./type", "type", vuart_connection_node)
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service_vm_endpoint = common.append_node(f"./endpoint", None, vuart_connection_node)
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common.append_node(f"./vm_name", service_vm_name, service_vm_endpoint)
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common.append_node(f"./io_port", service_vm_port, service_vm_endpoint)
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user_vm_endpoint = common.append_node(f"./endpoint", None, vuart_connection_node)
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common.append_node(f"./vm_name", user_vm_name, user_vm_endpoint)
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common.append_node(f"./io_port", user_vm_port, user_vm_endpoint)
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def get_console_vuart_port(scenario_etree, vm_name):
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port = common.get_node(f"//vm[name = '{vm_name}']/console_vuart/text()", scenario_etree)
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if port == "COM Port 1":
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port = "0x3F8U"
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elif port == "COM Port 2":
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port = "0x2F8U"
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elif port == "COM Port 3":
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port = "0x3E8U"
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elif port == "COM Port 4":
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port = "0x2E8U"
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return port
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def alloc_free_port(scenario_etree, load_order, vm_name):
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port_list = scenario_etree.xpath(f"//endpoint[vm_name = '{vm_name}']/io_port/text()")
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console_port = get_console_vuart_port(scenario_etree, vm_name)
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if console_port is not None:
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port_list.append(console_port.replace("U", ""))
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if load_order == "SERVICE_VM":
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tmp_list = []
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for port in port_list:
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tmp_list.append(int(port, 16))
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port_list = list(set(service_port_list) - set(tmp_list))
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port = hex(service_port_list[0])
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service_port_list.remove(port_list[0])
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return str(port).upper()
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else:
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tmp_list = list(set(standard_uart_port) - set(port_list))
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try:
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port = tmp_list[0]
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return port
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except IndexError as e:
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raise lib.error.ResourceError("Cannot allocate legacy io port: {}, {}".format(e, port_list)) from e
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def alloc_vuart_connection_info(board_etree, scenario_etree, allocation_etree):
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user_vm_list = scenario_etree.xpath(f"//vm[load_order != 'SERVICE_VM']")
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service_vm_id = common.get_node(f"//vm[load_order = 'SERVICE_VM']/@id", scenario_etree)
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service_vm_name = common.get_node(f"//vm[load_order = 'SERVICE_VM']/name/text()", scenario_etree)
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if (service_vm_id is None) or (service_vm_name is None):
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return
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for index,vm_node in enumerate(user_vm_list):
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vm_id = common.get_node("./@id", vm_node)
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load_order = common.get_node("./load_order/text()", vm_node)
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user_vm_name = common.get_node(f"./name/text()", vm_node)
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service_vm_port = alloc_free_port(scenario_etree, "SERVICE_VM", user_vm_name)
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user_vm_port = alloc_free_port(scenario_etree, load_order, user_vm_name)
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create_s5_vuart_connection(allocation_etree, service_vm_name, service_vm_port, user_vm_name, user_vm_port)
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def fn(board_etree, scenario_etree, allocation_etree):
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alloc_vuart_connection_info(board_etree, scenario_etree, allocation_etree)
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