Function sve_vector_length_configuration

src/thread/prctl.rs:790–796

()

/// [`prctl(PR_SVE_GET_VL,…)`]: https://man7.org/linux/man-pages/man2/prctl.2.html
#[inline]
pub fn sve_vector_length_configuration() -> io::Result<SVEVectorLengthConfig> {
    let bits = unsafe { prctl_1arg(PR_SVE_GET_VL)? } as c_uint;
    Ok(SVEVectorLengthConfig {
        vector_length_in_bytes: bits & PR_SVE_VL_LEN_MASK,
        vector_length_inherited_across_execve: (bits & PR_SVE_VL_INHERIT) != 0,
    })
}

const PR_SVE_SET_VL: c_int = 50;