into the host-specific files and wrapped access to them
with atomic operations since that's a structure global to
all the VMs. I think all the other globals are SMP clean
since they are only written once during module init time,
and read thereafter my all VMs.
Renamed all host OS specific functions to hostOS*(). All host
independent functions to host*().
I'd like to rename all monitor space functions to mon*() next.
a region of virtual memory. Now the same one works for getting
the pages of the kernel driver and memory objects allocated via
vmalloc().
Converted to using Linux interfaces to walk the page tables to
get at the physical memory addresses above. The old code was
digging up this info starting with looking at CR3. Linux has
functions/macros to do this, which can handle 2/3-level cases.
Wrapped the page table walk with proper locks. A spin lock
for new Linuxes, a big kernel lock for old ones.
new experimental stripped-down version of plex86, which is now
a user-code-only VM. I ripped out all the fancy stuff in plex86,
such that under that right conditions, user-code (protection level 3)
can run at near native speeds inside the plex86 VM.
The general idea is that bochs emulates all the initial real-mode code,
and guest kernel code (protection level 0). When it senses the
right conditions (like the context switches to user-code), a shim
is called to execute the guest inside the plex86 VM. All guest-generated
faults/exceptions are then forwarded back to bochs to be handled in
the emulator.
Actually, I'm not yet adding the mods to the bochs code (other than
the shim code which is in a separate file), until I hear that we're
back in a more development mode with bochs after the 2.0 release.
The plex86 subdirectory is really a separate project. It's just more
convenient to co-develop it with bochs for now. Both projects are
currently LGPL, but each should be taken to be a separate project,
and have their own license file. Plex86 (it's only a kernel driver
now) could ultimately be used with other projects, as it's modular.
I talked with Bryce, and we both agreed it's OK to keep plex86 as
a subdir in bochs for now.
