[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [Q] Allow rdpmc access from DOM-0
On 6/9/07 16:23, "Mohapatra, Hemant" <Hemant.Mohapatra@xxxxxxx> wrote: > My bad; I should've mentioned this before: I already have allowed access > to the appropriate MSRs and can read/write to them using rdmsr/wrmsr on > DOM-0. It was easy to add them to the white-list since the opcode was > already being trapped and virtualized and it was only a matter of adding > access to the MSRs I needed specifically. > > I have worked with Xenoprof but I am essentially trying to port a few > applications to Xen here and trying to re-write them in conjunction with > Xenoprof seems like the round-about way of doing it. I am trying to > follow the route of how rdmsr/wrmsr were virtualized so that I can do > the same with rdpmc. I see no harm in this since RDMSR is already > allowed from Dom0. Your problem might then be that your RDPMC emulation path is only executed if the instruction was trapped in guest kernel mode. I guess you are trying to execute it in guest user mode, and you may find that this mode is tested for before you reach the RDPMC case that you've added. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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