github/acrn-hypervisor
1
0
Fork 0
mirror of https://github.com/projectacrn/acrn-hypervisor.git synced 2025-09-13 12:59:45 +00:00
Code Issues Projects Releases Wiki Activity

misc: add vUART channel for s5 feature

Browse Source 
"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>
This commit is contained in:
Chenli Wei
2022-05-09 11:06:07 +08:00
committed by acrnsi-robot
parent d625ce0677
commit 2045577f12
3 changed files with 127 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
misc/config_tools/service_vm_config/serial_config.py
View File

@@ -17,7 +17,7 @@ VUART_DEV_NAME_NUM = 8
stadard_uart_port = {'0x3F8', '0x2F8', '0x3E8', '0x2E8'}
UART_IRQ_BAUD = " irq 0 uart 16550A baud_base 115200"
def find_non_standard_uart(vm, scenario_etree):
def find_non_standard_uart(vm, scenario_etree, allocation_etree):
uart_list = []
vmname = common.get_node("./name/text()", vm)
@@ -30,7 +30,17 @@ def find_non_standard_uart(vm, scenario_etree):
port = common.get_node(f".//endpoint[vm_name = '{vmname}']/io_port/text()", connection)
if port not in stadard_uart_port:
uart_list.append(connection)
target_vm_name = common.get_node(f".//endpoint[vm_name != '{vmname}']/vm_name/text()", connection)
target_vm_id = common.get_node(f"//vm[name = '{target_vm_name}']/@id", scenario_etree)
uart_list.append({"io_port" : port, "target_vm_id" : target_vm_id})
legacy_uart_list = allocation_etree.xpath(f"//vm[load_order = 'SERVICE_VM']/legacy_vuart")
for legacy_uart in legacy_uart_list:
port = common.get_node(f"./addr.port_base/text()", legacy_uart)
if port is None:
continue
elif port not in stadard_uart_port:
uart_list.append({"io_port" : port, "target_vm_id": common.get_node(f"./t_vuart.vm_id/text()", legacy_uart)})
return uart_list
@@ -45,23 +55,13 @@ def main(args):
vm_list = scenario_etree.xpath("//vm[load_order = 'SERVICE_VM']")
for vm in vm_list:
vmname = common.get_node("./name/text()", vm)
for connection in scenario_etree.xpath(f"//vuart_connection[endpoint/vm_name = '{vmname}']"):
vm_name = common.get_node(f".//endpoint[vm_name != '{vmname}']/vm_name/text()", connection)
for target_vm in scenario_etree.xpath(f"//vm[name = '{vm_name}']"):
vuart_target_vmid[connection.find('name').text] = target_vm.attrib["id"]
vm_list = scenario_etree.xpath("//vm[load_order = 'SERVICE_VM']")
for vm in vm_list:
vuart_list = find_non_standard_uart(vm, scenario_etree)
vuart_list = find_non_standard_uart(vm, scenario_etree, allocation_etree)
vmname = common.get_node("./name/text()", vm)
if len(vuart_list) != 0:
with open(args.out, "w+") as config_f:
for uart_start_num, vuart in enumerate(vuart_list, start=START_VUART_DEV_NAME_NO):
port = common.get_node(f".//endpoint[vm_name = '{vmname}']/io_port/text()", vuart)
base = " port " + str(port)
connection_name = vuart.find('name').text
vm_id_note = "# User_VM_id: " + str(vuart_target_vmid[connection_name]) + '\n'
base = " port " + vuart["io_port"]
vm_id_note = "# User_VM_id: " + str(vuart["target_vm_id"])+ '\n'
config_f.write(vm_id_note)
conf = "/dev/ttyS" + str(uart_start_num) + base + UART_IRQ_BAUD + '\n'
config_f.write(conf)