SPEC_CTRL_IBRS
test $SPEC_CTRL_IBRS, %eax
andl $(~SPEC_CTRL_IBRS), %edx
#define SPEC_CTRL_MITIGATIONS_MASK (SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD \
spec_ctrl_current() | SPEC_CTRL_IBRS, \
x86_spec_ctrl_base |= SPEC_CTRL_IBRS;
#define SPEC_CTRL_MITIGATIONS_MASK (SPEC_CTRL_IBRS | SPEC_CTRL_STIBP | SPEC_CTRL_SSBD \