On Tue, Jan 24, 2023 at 10:33:18AM -0600, Kim Phillips wrote:
> @@ -1495,8 +1495,12 @@ static void __init spectre_v2_select_mitigation(void)
> pr_err(SPECTRE_V2_EIBRS_EBPF_MSG);
>
> if (spectre_v2_in_ibrs_mode(mode)) {
> - x86_spec_ctrl_base |= SPEC_CTRL_IBRS;
> - update_spec_ctrl(x86_spec_ctrl_base);
> + if (boot_cpu_has(X86_FEATURE_AUTOIBRS)) {
> + msr_set_bit(MSR_EFER, _EFER_AUTOIBRS);
Doesn't this only enable it on the boot CPU?
--
Josh
