Greetings,
I am working with the camkes-arm-vm qemu-arm-virt configuration. I started with
the vm_minimal configuration and have added a tun/tap interface by creating the
tap on my host thusly:
# ip tuntap add tap0 mode tap
# ip addr add 10.0.120.100/24 dev tap0
# ip link set dev tap0 up
I have added support for what I beleive to be the appropriate interrupts by
modifying my devices.camkes file thusly:
vm0.untyped_mmios = [
"0x8040000:12", // Interrupt Controller Virtual CPU
interface (Virtual Machine view)
"0x10040000:17", // QEMU PCI MMIO
"0x3eff0000:16", // QEMU PCI IO ports
"0x40000000:29", // Linux kernel memory regions
];
vm0.dtb_irqs = [35, 36, 37, 38];
Additionally, I have modified the settings.camkes thusly:
if(${PLATFORM} STREQUAL "qemu-arm-virt")
# force cpu
set(QEMU_MEMORY "2048")
set(KernelArmCPU cortex-a53 CACHE STRING "" FORCE)
set(VmInitRdFile ON CACHE BOOL "" FORCE)
set(VmPCISupport ON CACHE BOOL "" FORCE)
set(VmVirtioNetArping OFF CACHE BOOL "" FORCE)
set(VmVirtioNetVirtqueue ON CACHE BOOL "" FORCE)
# set(qemu_sim_extra_args "-netdev
tap,id=mynet0,ifname=tap0,script=no,downscript=no -device
virtio-net,netdev=mynet0,mac=52:55:00:d1:55:01")
set(qemu_sim_extra_args "-net nic,model=e1000 -netdev
tap,id=mynet0,script=no,ifname=tap0 -device
virtio-net,netdev=mynet0,mac=52:55:00:d1:55:01")
set(KernelArmExportPCNTUser ON CACHE BOOL "" FORCE)
set(KernelArmExportPTMRUser ON CACHE BOOL "" FORCE)
endif()
This results in a tunl0 interface showing up on my linux guest. However, that
interface does not have a mac address associated with it. I can use ifconfig to
assign an IP address on the same subnet as the corresponding tap interface on
the host. However, I can’t ping between the two. I thought this might be
because I have VmVitruoNetArping set to OFF. However, I get compile time errors
when I turn it on. Because the tunl0 inteface does not have the mac address
specied in the qemu_sim_extra_args I am unsure of how to set up an arp table
entry.
Exctly what do I need to do to enable network communications between my linux
guest and the host?
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