Hi Juergen, On Fri, Feb 09, 2018 at 01:11:42PM +0100, Juergen Gross wrote: > On 09/02/18 10:25, Joerg Roedel wrote: > > XENPV is also untested from my side, but I added checks to > > not do the stack switches in the entry-code when XENPV is > > enabled, so hopefully it works. But someone should test it, > > of course. > > That's unfortunate. 32 bit XENPV kernel is vulnerable to Meltdown, too. > I'll have a look whether 32 bit XENPV is still working, though. > > Adding support for KPTI with Xen PV should probably be done later. :-) Not sure how much is missing to make it work there, one point is certainly to write the right stack into tss.sp0 for xenpv on 32bit. This write has a check to only happen for !xenpv. But let's first test the code as-is on XENPV and see if it still boots :) Thanks, 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>
