8.2.21. xen (Xen on ARM)¶
This BSP enables RTEMS to run as a guest virtual machine in AArch32 mode on the Xen hypervisor for ARMv8 platforms.
Drivers:
Clock: ARMv7-AR Generic Timer
Console: Virtual PL011 device
Interrupt: GICv2
BSP variants:
xen_virtual: completely virtualized guest with no dependence on underlying hardware
The xen_virtual BSP variant relies on standard Xen features, so it should be able to run on any ARMv8 platform.
Xen allows for the passthrough of hardware peripherals to guest virtual machines. BSPs could be added in the future targeting specific hardware platforms and include the appropriate drivers.
This BSP was tested with Xen running on the Xilinx Zynq UltraScale+ MPSoC using the Virtuosity distribution maintained by DornerWorks.
8.2.21.1. Execution¶
This procedure describes how to run the ticker sample application that should already be built with the BSP.
The ticker.exe file can be found in the BSP build tree at:
arm-rtems6/c/xen_virtual/testsuites/samples/ticker.exe
The ticker.exe elf file must be translated to a binary format.
arm-rtems6-objcopy -O binary ticker.exe ticker.bin
Then place the ticker.bin file on the dom0 filesystem.
From the dom0 console, create a configuration file ticker.cfg with the
following contents.
name = "ticker"1G
kernel = "ticker.bin"
memory = 8
vcpus = 1
gic_version = "v2"
vuart = "sbsa_uart"
Create the virtual machine and attach to the virtual vpl011 console.
xl create ticker.cfg && xl console -t vuart ticker
To return back to the dom0 console, press both Ctrl and ] on your
keyboard.