Re: [Xen-devel] Vmx_vmenter_helper() and hvm_inject_page_fault()

[Razvan Cojocaru <rzvncj@xxxxxxxxx>]

Hello Tim, thank you for your answer!

> Or, even easier, just leave the EPT state that caused the mem_event in
> the first place -- if the guest retries the instruction it will exit
> again with the same fault and you can have some state in the EPT fault
> handler to say 'next time, inject a pagefault'.

Good suggestion, I'm exploring it as we speak.

But, I would also like to know what the dangers of doing this in the
VMENTRY helper function are. Is it that the VMCS information is not yet
fully there? Is guest_cpu_user_regs() not reliable at that point? What
exactly could go wrong there?

Thanks.

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