Vmlaunch is failing on a new cpu

[thewolfram]

hey jonomango, I've got a new i5-12400F cpu and when I start the hypervisor, it is failing with instruction error 7

[jonomango]

This is the second time I've seen this issue and I'm still not sure what the cause is. According to the Intel Manual, error 7 means "VM entry with invalid control field." Try commenting out this line and seeing what happens.

[thewolfram]

This is the second time I've seen this issue and I'm still not sure what the cause is. According to the Intel Manual, error 7 means "VM entry with invalid control field." Try commenting out this line and seeing what happens.

I tried, but still nothing changed

[jonomango]

Can you try to set this line to 0?

[thewolfram]

Can you try to set this line to 0?

Seems like it succeded, but my pc just froze without bsod after this output

[jonomango]

Interesting, I'll have to push a commit with that fix. I'm already aware that the hypervisor doesn't work correctly for Intel 10th gen and up, which can be seen in this issue so I'll mark this as closed for now since we fixed the original issue.

[thewolfram]

Interesting, I'll have to push a commit with that fix. I'm already aware that the hypervisor doesn't work correctly for Intel 10th gen and up, which can be seen in this issue so I'll mark this as closed for now since we fixed the original issue.

It actually works for 10th gen Intel, you can see my issue where you helped me.

[jonomango]

Sorry, I meant 11th gen and up 😅

[jonomango]

I think that I'll try to compile a list of every Intel CPU that the hypervisor is confirmed to work on since it just seems to fail on the newer ones.

[jonomango]

Initial issue is fixed with https://github.com/jonomango/hv/commit/7ea88187afe2aac49151654e5c418c961b7bb94c

[jonomango]

As for the crashes, some users have said that increasing https://github.com/jonomango/hv/blob/main/hv/ept.h#L10 to around ~512 has fixed the issue, probably due to some I/O devices claiming the physical memory above RAM (my hypothesis).