>> >> PV guests don't go through Linux x86 early boot code. They start at >> xen_start_kernel() (well, xen-head.S:startup_xen(), really) and merge >> with baremetal path at x86_64_start_reservations() (for 64-bit). >> > > Ok, I don't think anything needs to be done then. The sme_me_mask is set > in sme_enable() which is only called from head_64.S. If the sme_me_mask > isn't set then SME won't be active. The feature will just report the > capability of the processor, but that doesn't mean it is active. If you > still want the feature to be clobbered we can do that, though.
I'd prefer to explicitly clear to avoid any ambiguity. -boris
