vgsp: m104 - inject the mail_kernel module-data base when bank-4 is empty

The forwarded mail_kernel reads __device__ kMail through c[0x4][0x0] (the
driver-provided module-data base), but the guest's bank-4 page content is
zero in the launch (the driver's value never lands in the resolved page).
With gr_mail_patch set, when bank 4's first 8 bytes are zero, allocate a
module page holding the demo message, map it at server-managed VA
0x11ff00000 (UPDATE_PDE_2, inside [0x100000000,0x11fffffff)) and point
c[0x4][0x0] there. The kernel then reads the message from device memory and
writes out[i] through the already-relocated bank-0 pointer; vadd (params
only) becomes the real relocated-data acceptance test.

0 files changed, 0 insertions, 0 deletions