[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86/hvm: implement save/restore for posted interrupts
Jan Beulich wrote on 2014-07-28: >>>> On 25.07.14 at 23:31, <kevin.tian@xxxxxxxxx> wrote: >> Well, my read of this patch is that it hides some problem other >> place by forcing posted injection at restore. As Yang has pointed >> out, it is not necessary once the notification has been synced to >> IRR it's done (will be noted before vmentry). So at restore path, >> it's just about how pending IRR is handled. Now the problem is that >> Yang can't reproduce the problem locally (let's see any change with >> Olaf's further information), so we need Olaf's help to figure out >> the real culprit with > our input. > > Searching the SDM I can't find any reference to IRR uses during > interrupt recognition. The only reference I can find is that during > delivery the IRR bit gets cleared and the new RVI determined by > scanning IRR. Hence I wonder whether setting RVI post-restore instead of > sync-ing IRR to PIR is what is needed? vmx_intr_assist() will do it. > > Jan Best regards, Yang _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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