[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Question about monitor_table
Note: If I don't specify then I'm referring to x86_32 (no PAE). Also I'm reading code from the 3.0 release but the concepts are probably the same. Could someone help me understand the need for the monitor page table. Ifigure that arch_vcpu->guest_table points to a guests L2 page table (PD on x86) and arch_vcpu->shadow_table points to the guest_table's shadow table (if shadowing is turned on) but I don't quite get the purpose of the monitor_table. On x86_32 it seems like it just gets set to the value of the guest table on initialization and I lose track of it after that. I understand Xen needs to trap page table updates but I figured that would be a privileged operation and Xen could trap those accesses through hardware faults or by paravirtualizing through hypercalls (do_mmu_update). That's a large amount of figuring so if someone could shed some light on the purpose and use of the monitor table I would appreciate it. Xen is awesome. -Travis _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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