On Fri, 12 Sep 2014, Thomas Gleixner wrote: > On Fri, 12 Sep 2014, Dave Hansen wrote: > The proper solution to this problem is: > > do_bounds() > bd_addr = get_bd_addr_from_xsave(); > bd_entry = bndstatus & ADDR_MASK: Just for clarification. You CANNOT avoid the xsave here because it's the only way to access BNDSTATUS according to the manual. "The BNDCFGU and BNDSTATUS registers are accessible only with XSAVE/XRSTOR family of instructions" So there is no point to cache BNDCFGU as you get it anyway when you need to retrieve the invalid BD entry. Thanks, tglx -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>