On Tue, Apr 25, 2017 at 09:17:13PM +0100, Andrew Cooper wrote:
> The problem (for all ring-deprivileged virtuailsation; not just Xen PV),
> is that
I know what that that bug flag is for.
I'm asking whether the xen guest boot sets a flag early - like XENPV,
for example - which can differentiate be
On 25/04/17 20:18, Borislav Petkov wrote:
> On Tue, Apr 25, 2017 at 08:34:34PM +0200, Juergen Gross wrote:
>> And what happens when there is a scheduling event right here?
>> __switch_to() will see X86_BUG_SYSRET_SS_ATTRS set and take a wrong
>> path.
> So the whole thing we're doing right now is w
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