On 14 May 2013 10:29, Gerd Hoffmann kraxel@redhat.com wrote:
Anthony wrote:
and is also a good reason why exposing this information via a common interface (fw_cfg) would be a good idea.
Huh? As far I know we generate device trees in qemu
It depends. For ARM we insist that the user provides the device tree that corresponds to the kernel they're going to run, and then we just tweak it a bit. (For the upcoming 'mach-virt' pure-virtual hardware we're going to end up generating a device tree completely from scratch, though.)
Not sure fw_cfg is particularly relevant though -- for device tree the obvious "nice" way to do it would be to have the device tree generating/modifying code able to walk the QOM object tree introspecting it to identify hardware presence and properties. That's probably not doable today though. (I need to look more closely at PPC device tree handling, really.)
thanks -- PMM