Re: SEV guest regression in 4.18

From: Borislav Petkov
Date: Wed Aug 22 2018 - 04:14:29 EST

Dropping Pavel as it bounces.

On Tue, Aug 21, 2018 at 11:07:38AM -0500, Brijesh Singh wrote:
> The tsc_early_init() is called before setup_arch() -> init_mem_mapping.

Ok, I see it, thanks for explaining.

So back to your original ideas - I'm wondering whether we should define
a chunk of memory which the hypervisor and guest can share and thus
communicate over... Something ala SEV-ES also with strictly defined
layout and put all those variables there. And then the guest can map

There might be something similar though, I dunno.

Maybe Paolo has a better idea...


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