Using the qemu fwcfg has one big disadvantage: Bhyve's fwctl and qemu's fwcfg can't be used at the same time. Due to backward compatibility reasons, bhyve uses fwctl as default. So, using qemu's fwcfg to locate the rsdp only works, if the user changes his bhyve call. I don't want to use fwctl to locate the rsdp because IMHO we should migrate to fwcfg. So, we shouldn't add new features to fwctl.
Ah ok.
Btw: I'm also preparing some patches to support qemu's acpi table loader. So, if we like to use qemu's fwcfg, we should use the loader instead of an own baked solution.
Yes: that's a much better solution. The bhyve-generated ones are very size-limited.
later, Peter.
