On 4/11/2023 3:00 AM, Michael S. Tsirkin wrote:
I meant, it depends on the capability semantics. Both PASID and legacy
MMIO don't need to be accessed by BIOS. We can't change legacy BIOS to
use legacy MMIO bars.
Thanks
makes sense.
now, imagine someone building a new device. if existing drivers are not
a concern, it is possible to move capabilities all to extended space. is
that possible while keeping the bios working?
unlikely as bios is looking in the legacy section.
New capabilities like legacy (and pasid) has no backward compat
requirement from bios and drivers.
so they can start from new.
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