Re: [RFC 00/10] Process-local memory allocations for hiding KVM secrets

[Dave Hansen]

On 6/17/19 12:38 AM, Alexander Graf wrote:
>> Yes I know, but as a benefit we could get rid of all the GSBASE
>> horrors in
>> the entry code as we could just put the percpu space into the local PGD.
> 
> Would that mean that with Meltdown affected CPUs we open speculation
> attacks against the mmlocal memory from KVM user space?

Not necessarily.  There would likely be a _set_ of local PGDs.  We could
still have pair of PTI PGDs just like we do know, they'd just be a local
PGD pair.