On 22.07.25 14:21, Xiaoyao Li wrote: > On 7/22/2025 7:15 PM, Daniel P. Berrangé wrote: >> [...] >> >> Usually CSPs don't have full control over what their customers >> are running as a guest. If their customers are running mainstream >> modern guest OS, CONFIG_STRICT_KERNEL_RWX is pretty likely to be >> set, so presumably migration between Intel & AMD will not work >> and this isn't making it worse ? > > If breaking some usecase is not a concern, then I'm fine with no compat > property.
Well, there's still the chicken bit `-accel kvm,hypercall-patching=on` one could make use of if (and really only if) that's really needed. But I'd rather have the guest see a proper exception emulation of trying to execute an unsupported instruction than seeing a bogus #PF. Thanks, Mathias
