Re: proposal for meltdown-workaround with low overhead

[Tony Luck]

On Thu, Jan 4, 2018 at 11:45 AM, Alexander Kleinsorge
<aleks@xxxxxxxxxxxxxxxxxxx> wrote:
> As Meltdown-Issue depends on allowing to cause many exceptions (usually :
> accessing an invalid address), we could restrict this misusage easy.

The accesses to the invalid address are performed speculatively by the CPU in
a code branch that is later found to be not taken. Hence there are no exceptions
at all.

-Tony