bhyve: trap protected BAR regions of passthru devices

[corvink]

Summary

At the moment, the list of protected BAR regions is unused by the passthru
emulation. Make use of it when mapping the BAR regions. This causes bhyve to
trap those regions.

[markj]

usr.sbin/bhyve/pci_passthru.c

1335–1336

Have you tried using tools/build/checkstyle9.pl?

1398

[corvink]

• fix style issues

[corvink]

usr.sbin/bhyve/pci_passthru.c

1335–1336

Wasn't aware of this helper tool. I'm always using the top level .clang-format. Unfortunately, it seems to be incorrect for some cases.

[corvink]

ping

[corvink]

• rebase onto main

[jhb]

Seems ok to me overall.

usr.sbin/bhyve/pci_passthru.c

1336

1399

You could perhaps use trunc_page and round_page here if you wished:

handler_off = trunc_page(handler->off);
handler_end = round_page(handler->off + handler->len);

1404

[corvink]

• fix style issues
• make use of trunc_page and round_page

[corvink]

• rename len to size to match common naming in pci_passthru.c