>>> David Vrabel <david.vra...@citrix.com> 12/23/14 12:01 PM >>> >On 19/12/14 16:16, Jan Beulich wrote: >> Using the native code here can't work properly, as the hypervisor would >> normally have cleared the two reason bits by the time Dom0 gets to see >> the NMI (if passed to it at all). There's a shared info field for this, >> and there's an existing hook to use - just fit the two together. Note >> that the hook can (and should) be used irrespective of whether being in >> Dom0, as accessing port 0x61 in a DomU would be even worse, while the >> shared info field would just hold zero all the time. > >What's the user visible impact of this fix?
Depends on what "user visible" is: It ought to prevent "Dazed and confused..." messages when not really applicable, and allow to get forwarded particularly SERR ones to APEI (GHES) code instead. I can't say I've seen this work in practice, as I lack ways to force SERR on otherwise well behaving hardware, but code inspection shows that the way it is now it can't work as intended. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
