MDSCR_KDE
MDSCR_SS | MDSCR_KDE);
~(MDSCR_SS | MDSCR_KDE));
READ_SPECIALREG(mdscr_el1) | MDSCR_KDE);
mdscr &= ~(MDSCR_MDE | MDSCR_KDE);
mdscr |= MDSCR_KDE;
READ_SPECIALREG(mdscr_el1) & ~(MDSCR_MDE | MDSCR_KDE));
READ_SPECIALREG(mdscr_el1) & ~(MDSCR_MDE | MDSCR_KDE));