Re: [PATCH 2/2] hw/riscv/virt.c: change default CPU to 'max'

[Richard Henderson]

On 4/4/25 08:27, Daniel Henrique Barboza wrote:
Using 'max' as
default CPU is done by other QEMU archs like aarch64 so we'll be more
compatible with everyone else.

This isn't true.  qemu-system-aarch64 -M virt defaults to cortex-a15 (for hysterical 
raisins), which is completely and totally useless.  Which means that one must always pass 
a -cpu option to qemu-system-aarch64.

Moreover, -cpu max has zero migration guarantees, so anyone who wants to be able to 
reliably migrate is encouraged to use a real cpu model.

I suppose, for throwaway VMs, -cpu max is a decent default.  But there's a lot to be said 
for not specifying a default at all.


r~