On Fri, Aug 24, 2018 at 09:17:49PM +0200, Greg Kroah-Hartman wrote: > On Fri, Aug 24, 2018 at 10:08:28AM -0700, Roland Dreier wrote: > > > See > > > <https://lore.kernel.org/lkml/1512686629.18523.217.camel@xxxxxxxxxxxxxxx/T/#u>. > > > > Thanks! I'm not using SGI UV and I'm not using kexec, so I guess I > > sidestepped most of those issues. Greg, I think we need to unrevert > > the cpa->pfn change (otherwise the L1TF fix probably gets pretty > > messy) and I guess pull in the other patches that Ben mentions. > > Ok, so what patch should be reverted? I'm seeing other reports of > problems all around this same area, but I can't figure out exactly what > to do. > > Guenter, any ideas? > I think we'll need to reapply 87e2bd898d3a ("x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"), and possibly apply d367cef0a7f0 ("x86/mm/pat: Fix boot crash when 1GB pages are not supported by the CPU"). Both require conflict resolutions, but they are quite straightforward. I am not sure about the other EFI patches. I am going to send the backports as RFT in a minute. Problem is that I don't have an EFI system at hand and can not test if this fixes the problem (or maybe introduces a new one), so someone will need to step in and do those tests. Guenter
