On Tue, Apr 06, 2021 at 10:47:18AM -0500, Brijesh Singh wrote:
> Before the GHCB is established the caller does not need to save and
> restore MSRs. The page_state_change() uses the GHCB MSR protocol and it
> can be called before and after the GHCB is established hence I am saving
> and restoring GHCB MSRs.
I think you need to elaborate on that, maybe with an example. What the
other sites using the GHCB MSR currently do is:
1. request by writing it
2. read the response
None of them save and restore it.
So why here?
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
