On Fri, Aug 27, 2021 at 02:57:11PM -0500, Tom Lendacky wrote:
> The main thing about this is that it is an error code from the HV on
> extended guest requests. The HV error code sits in the high-order 32-bits of
> the SW_EXIT_INFO_2 field. So defining it either way seems a bit confusing.
> To me, the value should just be 1ULL and then it should be shifted when
> assigning it to the SW_EXIT_INFO_2.
Err, that's from the GHCB spec:
"The hypervisor must validate that the guest has supplied enough pages
...
certificate data in the RBX register and set the SW_EXITINFO2 field to
0x0000000100000000."
So if you wanna do the above, you need to fix the spec first. I'd say.
:-)
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
