[edk2-devel] [PATCH v4 0/4] SEV Live Migration support for OVMF.

[Dov Murik]

+cc Tobin


On 22/06/2021 20:46, Ashish Kalra via groups.io wrote:
> Hello Laszlo,
> 
> Please see my replies below :
> 
> On Tue, Jun 22, 2021 at 07:20:53PM +0200, Laszlo Ersek wrote:

-snip-


> 
>> Anyway, where I'm particularly lost is that I (very vaguely) recall conflicting approaches from AMD and IBM on migration. Has an agreement been reached there?
>>
> 
> Yes, these are the slow SEV live migration patches. The fast migration
> support is being developed by IBM and that is a separate effort. 
> 
> As this slow live migration support has now been included in KVM, we
> will need the corresponding OVMF and QEMU support now.
> 


I'll also add that the fast (guest-assisted) SEV migration we (IBM) are
working on uses some of the features of the "slow" migration.  For
example, for sure, patches 1-3 in this series will be needed to keep the
record of which of the guest pages are encrypted and which are shared
(also in fast migration).

-Dov



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