hma_fpu_describe_xsave_state
const uint_t max_entries = hma_fpu_describe_xsave_state(
(void) hma_fpu_describe_xsave_state(NULL, 0, &valid_len);
extern uint_t hma_fpu_describe_xsave_state(hma_xsave_state_desc_t *, uint_t,