[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v1] x86/hvm: Generic instruction re-execution mechanism for execute faults



On 27.11.2018 13:32, Roger Pau Monné wrote:
> Would it be possible to add some kind of flag to the emulator to
> signal whether p2m restrictions should be enforced/ignored?
> hvmemul_acquire_page seems like a suitable place, but I'm not that
> familiar with the emulator.
> 
> Then you could generate vm events from the emulator itself, which
> AFAICT is the only way to handle this instruction execution issue.

I've been testing what place would be the best to have the emulator send 
a event and it turns out the hvmemul_acquire_page is not ok. What worked 
form me was having the emulator send write access violations from 
hvmemul_map_linear_addr(). Here I can get the gfn, gla and offset for 
the event.

For the exec access violation I've tried to send events from 
hvmemul_insn_fetch() but there is a problem to get the same variables 
for the event. Is there a way to go around and get those params for the 
event? Any thoughts are appreciated.

Regards,
Alex
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.