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

Re: [Xen-devel] [PATCH v7 00/15] x86/hvm: I/O emulation cleanup and fix | Full Backtrace of domU's X crash caused by SSE2 istruction in attachment

>>> On 10.07.15 at 12:51, <fabio.fantoni@xxxxxxx> wrote:
> Il 10/07/2015 12:20, Jan Beulich ha scritto:
>> Other than MOVD, MOVAPS is already being supported by the
>> insn emulator.
> Then why do you think MOVAPS fails in my test?

No idea. That's what Paul asked you to narrow down.

> Sse2 was introduced in cpus 11 years ago, so I think it would be useful 
> to add support for all missing instructions to avoid more cases like 
> this (and it seems to improve performance too, comparing the same task 
> executed with/without sse2).

The reason we didn't add any more of the SSE insns so far is that
we don't expect them to be used for accessing MMIO. Once we
learn they're needed, we'll add emulation for them, but you
realize this is a significant task?


Xen-devel mailing list



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