| Date | Fri, 9 Feb 2018 14:35:07 +0100 | From | Joerg Roedel <> | Subject | Re: [PATCH 00/31 v2] PTI support for x86_32 |
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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
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