Re: [PATCH v9 02/10] x86/bhi: Make clear_bhb_loop() effective on newer CPUs

Dave Hansen
2026-04-07T23:41:09Z

On 4/7/26 16:27, Jim Mattson wrote:
> What is your proposed BHI_DIS_S override mechanism, then?

Let me make sure I get this right. The desire is to:

1. Have hypervisors lie to guests about the CPU they are running on (for
the benefit of large/diverse migration pools)
2. Have guests be allowed to boot with BHI_DIS_S for performance
3. Have apps in those guests that care about security to opt back in to
BHI_DIS_S for themselves?