Hi Boris, thanks for testing this :) On Tue, Jan 16, 2018 at 09:47:06PM -0500, Boris Ostrovsky wrote: > On 01/16/2018 11:36 AM, Joerg Roedel wrote: > >+.macro SWITCH_TO_KERNEL_STACK nr_regs=0 check_user=0 > > > This (and next patch's SWITCH_TO_ENTRY_STACK) need X86_FEATURE_PTI check. > > With those macros fixed I was able to boot 32-bit Xen PV guest. Hmm, on bare metal the stack switch happens regardless of the X86_FEATURE_PTI feature being set, because we always program tss.sp0 with the systenter stack. How is the kernel entry stack setup on xen-pv? I think something is missing there instead. Regards, Joerg -- 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>
