Messages in this thread | | | From | Bandan Das <> | Subject | Re: [PATCH v4 3/3] KVM: nVMX: Emulate EPTP switching for the L1 hypervisor | Date | Tue, 11 Jul 2017 14:35:00 -0400 |
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Jim Mattson <jmattson@google.com> writes: ... >>> I can find the definition for an vmexit in case of index >= >>> VMFUNC_EPTP_ENTRIES, but not for !vmcs12->eptp_list_address in the SDM. >>> >>> Can you give me a hint? >> >> I don't think there is. Since, we are basically emulating eptp switching >> for L2, this is a good check to have. > > There is nothing wrong with a hypervisor using physical page 0 for > whatever purpose it likes, including an EPTP list.
Right, but of all the things, a l1 hypervisor wanting page 0 for a eptp list address most likely means it forgot to initialize it. Whatever damage it does will still end up with vmfunc vmexit anyway.
Bandan
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