XFEATURE_CET_USER
#define XFEATURE_MASK_CET_USER (1 << XFEATURE_CET_USER)
XFEATURE_CET_USER);
cetregs = get_xsave_addr(&fpu->fpstate->regs.xsave, XFEATURE_CET_USER);
cetregs = get_xsave_addr(xsave, XFEATURE_CET_USER);
case XFEATURE_CET_USER: return XCHECK_SZ(sz, nr, struct cet_user_state);
[XFEATURE_CET_USER] = X86_FEATURE_SHSTK,