[Xen-devel] Question's about to detect unauthorized memory access

[Kai Luo <kluo@xxxxxxxxxx>]

Hi:

    To detect and handle unauthorized memory map from hvm to dom0ïI found xsm can  prevent a privileged domain from arbitrarily mapping pages from other domains,however,I try to find whether there is another way. So I try to  trap the memory access and  compare the page owner whth the accessor, if they are different, somthing must happend and a warning to the administrator will be raised.

    My question is how can I trap the memory access? Is there any other mechanism to detect unauthorized memory map?With EPT/NPT, memory access are so closed to hardware that I donât know how should I trap it?Can you give me any suggestion?

    Thank you very much!

Jone

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