Re: EFI mixed mode + perf = rampant triple faults

[Andy Lutomirski]

On Wed, Jan 14, 2015 at 10:47 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> On Wed, Jan 14, 2015 at 10:38:25AM -0800, Andy Lutomirski wrote:
>> That's not a real MCE, though -- it happens synchronously instead of
>
> MCE can be synchronous in a sense too, as a result of executing an insn,
> for example, i.e., EIPV bit set.
>
>> at MCE priority with all the associated messiness.  Or is the idea to
>> just stick that in after switching to the 32-bit mode being tested?
>
> Yes, the idea was to simply trigger a real exception after switching to
> 32-bit while still with 64-bit IDT handlers.
>

Seems like a reasonable test to me.

--Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/