Re: [Xen-devel] [PATCH 5/7] x86/traps: Lift all non-entrypoint logic in entry_int82() up into C

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 03.05.17 at 20:29, <andrew.cooper3@xxxxxxxxxx> wrote:
> Irrespective of the history which lead to this point, the important
> question is whether we want to allow compiling x86 without CONFIG_COMPAT.
> 
> If the eventual decision is yes, then new code should specifically be
> introduced as being CONFIG_COMPAT-clean, because decisions like that
> affect how to structure the code in the first place, and therefore be
> far cleaner changes than trying to retrofit CONFIG_COMPAT in the future.

Well, okay, I can agree with this. So what would an x86-Xen with
COMPAT off support? 64-bit guests only, regardless of type? As
said before, I don't view it as a reasonable setup to allow only
64-bit HVM guests, so unless there is an intention to have a
configuration where only PVH guests are supported (i.e. neither
PV nor traditional HVM), I don't think allowing the option to be
turned off makes sense on x86.

Jan


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