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pmb.qemu: drop vexpress (armv7) support (!1886) 

device-qemu-vexpress appears to be completely broken at the moment.
I was not able to make it show anything, get a log or even just get
any indication that it is actually doing something.

In general, it does also not fit well to the other QEMU ports.
The vexpress machine type in QEMU seems to be quite limited,
e.g. it has no PCIe bus and therefore it is impossible to configure it
with virtio-gpu. (Unlike already configured for x86_64 and aarch64).

I had some success with a setup similar to aarch64 with -M virt,highmem=off
but was unable to make it work in the end:

  - Alpine's virt kernel was missing some options preventing boot completely
  - Alpine's lts kernel was missing PCI support for virtio-gpu
  - Even after adding the options the VM usually freezed after boot

Overall it does not quite seem worth the effort at the moment,
compared to how well x86_64 and aarch64 are working.

In any case, vexpress is too different (and broken) to continue maintaining it.
This commit is contained in:
Minecrell 2020-03-05 23:06:29 +01:00 committed by Oliver Smith
parent f536fd9cb9
commit c7455f7a21
No known key found for this signature in database
GPG Key ID: 5AE7F5513E0885CB
1 changed files with 2 additions and 16 deletions
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18
pmb/qemu/run.py
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@ -113,6 +113,8 @@ def command_qemu(args, arch, img_path):
command += ["-kernel", rootfs + "/boot/vmlinuz-" + flavor]
command += ["-initrd", rootfs + "/boot/initramfs-" + flavor]
command += ["-append", shlex.quote(cmdline)]
command += ["-smp", str(os.cpu_count())]
command += ["-m", str(args.memory)]
command += ["-netdev",
"user,id=net0,"
@ -122,26 +124,12 @@ def command_qemu(args, arch, img_path):
]
command += ["-show-cursor"]
if args.deviceinfo["dtb"] != "":
dtb_image = rootfs + "/usr/share/dtb/" + args.deviceinfo["dtb"] + ".dtb"
if not os.path.exists(dtb_image):
raise RuntimeError("DTB file not found: " + dtb_image)
command += ["-dtb", dtb_image]
smp = os.cpu_count()
if arch == "x86_64":
command += ["-vga", "virtio"]
command += ["-serial", "stdio"]
command += ["-drive", "file=" + img_path + ",format=raw"]
command += ["-device", "e1000,netdev=net0"]
elif arch == "arm":
command += ["-M", "vexpress-a9"]
command += ["-sd", img_path]
command += ["-device", "virtio-net-device,netdev=net0"]
smp = min(smp, 4)
elif arch == "aarch64":
command += ["-M", "virt"]
command += ["-cpu", "cortex-a57"]
@ -157,8 +145,6 @@ def command_qemu(args, arch, img_path):
else:
raise RuntimeError("Architecture {} not supported by this command yet.".format(arch))
command += ["-smp", str(smp)]
# Kernel Virtual Machine (KVM) support
native = args.arch_native == args.deviceinfo["arch"]
if native and os.path.exists("/dev/kvm"):