vgsp: m81 - map the PM ctx-buffer booking VA before the engine context load

The m80 window shows PGRAPH_INTR=0x00000010 (ILLEGAL_METHOD, the reserved-SW
prelude methods, same as the real driver) clearing, then 0x00200002
(SEMAPHORE|EXCEPTION) pending exactly when the QMD activates, followed by the
FECS save/unload. The real driver's launch transient carries the same
ILLEGAL_METHOD without ever setting EXCEPTION, so the exception is the
ctx-restore difference. The one R1-booked ctx VA with no PTE is PM
(0x2370000): the golden9 range mapping covers PATCH/FECS/PRIV/UNR and the four
globals (windows 17..22 after the golden9k 1->6 extension) but never PM, and
R1-before-F2 makes the image carry that VA as the PM pointer. Map it through
the ctx PT window right after the mode-35 PM FBMEM allocation, before any
engine context load and before the PTE line's first fetch.

0 files changed, 0 insertions, 0 deletions