Re: [RFC v2 17/18] spapr: Added PEF based guest memory protection

2020-06-04 Thread David Gibson
On Fri, May 29, 2020 at 12:59:40AM -0700, Ram Pai wrote: > On Thu, May 21, 2020 at 01:43:03PM +1000, David Gibson wrote: > > Some upcoming POWER machines have a system called PEF (Protected > > Execution Framework) which uses a small ultravisor to allow guests to > > Framework -> Facility > > >

Re: [RFC v2 17/18] spapr: Added PEF based guest memory protection

2020-05-29 Thread Ram Pai
On Thu, May 21, 2020 at 01:43:03PM +1000, David Gibson wrote: > Some upcoming POWER machines have a system called PEF (Protected > Execution Framework) which uses a small ultravisor to allow guests to Framework -> Facility > run in a way that they can't be eavesdropped by the hypervisor. The >

Re: [RFC v2 17/18] spapr: Added PEF based guest memory protection

2020-05-25 Thread Greg Kurz
On Thu, 21 May 2020 13:43:03 +1000 David Gibson wrote: > Some upcoming POWER machines have a system called PEF (Protected > Execution Framework) which uses a small ultravisor to allow guests to s/Framework/Facility > run in a way that they can't be eavesdropped by the hypervisor. The > effect

[RFC v2 17/18] spapr: Added PEF based guest memory protection

2020-05-20 Thread David Gibson
Some upcoming POWER machines have a system called PEF (Protected Execution Framework) which uses a small ultravisor to allow guests to run in a way that they can't be eavesdropped by the hypervisor. The effect is roughly similar to AMD SEV, although the mechanisms are quite different. Most of