Re: [PATCH] ptp: Add vDSO-style vmclock support

[Michael S. Tsirkin]

On Fri, Jul 26, 2024 at 09:35:51AM +0100, David Woodhouse wrote:
> But for this use case, we only need a memory region that the hypervisor
> can update. We don't need any of that complexity of gratuitously
> interrupting all the vCPUs just to ensure that none of them can be
> running userspace while one of them does an update for itself,
> potentially translating from one ABI to another. The hypervisor can
> just update the user-visible memory in place.

Looks like then your userspace is hypervisor specific, and that's a
problem because it's a one way street - there is no way for hypervisor
to know what does userspace need, so no way for hypervisor to know which
information to provide. No real way to fix bugs.

-- 
MST