On Wed, Jan 26, 2022 at 08:44:46AM +0000, Andrew Cooper wrote: > All AMD IBRS-related features are in CPUID.0x80000008.ebx. Collect them in > early_cpu_init() so init_speculative_mitigations() can use them. > > Rework the existing logic structure to fill in c->extended_cpuid_level and > separate out the ambiguous use of ebx in an otherwise 0x80000008-specific > logic block. > > Signed-off-by: Andrew Cooper <[email protected]>
Reviewed-by: Roger Pau Monné <[email protected]> It would be good to update the comment ahead of early_cpu_init to mention it now also gather speculation-related fields from CPUID in order to do early setup of mitigations. I think you could also use boot_cpu_data in spec_ctrl.c print_details instead of fetching again the cpuid leafs? Thanks, Roger.
