get_xsave_addr
extern void *get_xsave_addr(struct xregs_state *xsave, int xfeature_nr);
xstate = get_xsave_addr(&x86_task_fpu(dst)->fpstate->regs.xsave,
cetregs = get_xsave_addr(&fpu->fpstate->regs.xsave, XFEATURE_CET_USER);
cetregs = get_xsave_addr(xsave, XFEATURE_CET_USER);
EXPORT_SYMBOL_FOR_KVM(get_xsave_addr);
void *addr = get_xsave_addr(&fpstate->regs.xsave, xfeature);
s = get_xsave_addr(xsave, XFEATURE_YMM);