ID_AA64PFR1_SSBS_SHIFT
#define ID_AA64PFR1_SSBS_MASK (UL(0xf) << ID_AA64PFR1_SSBS_SHIFT)
#define ID_AA64PFR1_SSBS_NONE (UL(0x0) << ID_AA64PFR1_SSBS_SHIFT)
#define ID_AA64PFR1_SSBS_PSTATE (UL(0x1) << ID_AA64PFR1_SSBS_SHIFT)
#define ID_AA64PFR1_SSBS_PSTATE_MSR (UL(0x2) << ID_AA64PFR1_SSBS_SHIFT)