On 7/6/23 12:37, Paolo Bonzini wrote:
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On 6/7/23 12:13, Babis Chalios wrote:
On our side, we 've been working on providing ways to let VMs (kernel
and user space) know that they have been cloned/snapshotted/restored
from snapshots[1].
This is tightly coupled with PRNGs both in kernel and user space and
there needs to be some collaboration with random.c to tie everything
together [2][3]. It sounds like it could be a good fit for this MC
(?).
Does the VM generation ID ACPI device from Microsoft work for you? It
is not tied to Hyper-V.
Paolo
It's a long story :P
TLDR:
For some use-cases it should be enough [1]. For PRNGs though it doesn't
seem to work as is. (1) The Linux implementation of VMGENID is racy and
(2) last year there were long discussions related to the user-space
ABI, which diverged us away from it.
BTW, just saw that you have already submitted the proposal for the MC,
sorry for being late :)
Cheers,
Babis
