vgsp: bar1_full A/B knob for the display instance-memory mapping

The guest sees a 256 MiB BAR1 over a 512 MiB FB, so the display
instance block at 0x1fff0000 (top of FB) is not directly mappable and
the guest's hash-table writes never reach the emulated vidmem shadow
(r1633: notifier ctxDMA handles 0x10013/0x10075 unresolvable; not in
the shadow, not in guest RAM; 0x20800afa GSP-DMA never sent).

bar1_full=1 exposes the whole emulated FB as BAR1 (the m143 behaviour)
so the test can settle whether the aperture is the missing link; the
default keeps the historical 256 MiB physical aperture (CUDA-safe).

0 files changed, 0 insertions, 0 deletions