On Tue, Jan 10, 2012 at 10:28:06AM +0100, Kevin Wolf wrote:
> Am 10.01.2012 10:01, schrieb Gleb Natapov:
> > On Mon, Jan 09, 2012 at 09:10:10PM +0100, Kevin Wolf wrote:
> >> * This works with VMX, but with SVM I have an additional problem: When
> >> trying to exit VM86 (usually by an exception) through a task gate in
> >> the IDT, the code runs into the reason = TASK_SWITCH_CALL path. I
> >> searched a bit in the documentation, but didn't find any obvious way
> >> to fix this.
> >>
> > Hmm, so exit_int_info is invalid during task switch exit even though
> > task switch was caused by an exception. I wonder is this the case when
> > vcpu is not in vm86 mode too?
>
> No idea, I would have to try it out.
>
IIRC (again) 32 bit Linux kernel configures double fault as a task gate,
so causing #DF on 32 bit kernel guest should be enough to test that.
--
Gleb.
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