On 01/15/2010 03:49 PM, Alexander Graf wrote:
Right now the code to use external providers (FPU/Altivec/FSX) is rather hacky.
We just set the respective feature bit in the guest MSR when the guest requests
it and declare it as good. Now, Linux wants to mess around there too, so
whenever a process switch occurs, it saves the external provider state and
reloads the current thread ones'.
Unfortunately, we didn't tell Linux about our guest state. So Linux doesn't even
get the chance to swap any of our registers around which means it ends up
restoring registers from random processes - and we lose all state.
This patchset makes at least FPU and Altivec work. I don't have a VSX machine to
test that extension on. While at it, it also fixes some issues I've stumbled
across during debug.
The basic ideas on how this should work come from Benjamin Herrenschmidt.
Thanks a lot for giving input on this one (and all the other times)!
Applied all, thanks.
--
error compiling committee.c: too many arguments to function
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