Re: -device T,help crashes

[Thomas Huth <thuth@redhat.com>]

On 11/03/2026 15.55, Peter Maydell wrote:
> On Wed, 11 Mar 2026 at 14:10, Markus Armbruster <armbru@redhat.com> wrote:
>>
>> Watch this:
>>
>>      $ qemu-system-aarch64 -S -display none -M virt -device acpi-ged,help
>>      qemu-system-aarch64: ../hw/core/qdev.c:858: qdev_get_machine: Assertion `dev' failed.
>>
>> A number of devices crash this way:
>>
>> * acpi-ged (aarch64 arm i386 loongarch64 x86_64)
>> * fsl-imx6 (aarch64 arm)
>> * fsl-imx7 (aarch64 arm)
>> * fsl-imx8mp (aarch64)
>> * microchip.pfsoc (riscv64)
>> * riscv.sifive.e.soc (riscv32 riscv64)
>> * xlnx-zynqmp (aarch64)
> 
> Largely speaking these are pretty useless to try to create on
> the command line, of course...

Agreed, but note that you can also query help for non-user-creatable devices 
normally, e.g.:

$ ./qemu-system-x86_64 -device port92
qemu-system-x86_64: -device port92: Parameter 'driver' expects a pluggable 
device type
$ ./qemu-system-x86_64 -device port92,help
port92 options:
   a20[0]=<link<irq>>
   port92[0]=<child<memory-region>>

... so we likely should fix the crashes anyway, even if we decide to mark 
the devices with user_creatable = false.

  Thomas