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RE: [Xen-ia64-devel] vcpu_match_tr_entry
| To: | "Tristan Gingold" <Tristan.Gingold@xxxxxxxx>, <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | RE: [Xen-ia64-devel] vcpu_match_tr_entry |
| From: | "Xu, Anthony" <anthony.xu@xxxxxxxxx> |
| Date: | Thu, 30 Mar 2006 16:29:39 +0800 |
| Delivery-date: | Thu, 30 Mar 2006 08:32:36 +0000 |
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| Thread-index: | AcZT0wxS1ZGI8dluRGSX2ljQSi2RvgAAC9VA |
| Thread-topic: | [Xen-ia64-devel] vcpu_match_tr_entry |
>current definition of vcpu_match_tr_entry is: >#define vcpu_match_tr_entry(_trp,_ifa,_rid) \ > ((_trp->p && (_trp->rid==_rid) && (_ifa >= _trp->vadr) && \ > (_ifa < (_trp->vadr + (1L<< _trp->ps)) - 1))) > ^^ >Why -1 ? >I suppose it is either <= (vadr + ps -1) or < (vadr + ps - 1) ? > >Thank you for any comment. Percpu data of guest is put at high address, saying 0xffffffffffff0000, Thus, vadr+1L<<ps is wrapped to 0, the correct statement maybe, (_ifa <= (_trp->vadr + (1L<< _trp->ps)) - 1)) Thanks, Anthony _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel |
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