On Wed, Oct 26, 2016 at 03:16:25PM +0300, poletaev wrote: > Hello. I am trying to make realization of vmx for qemu. > > For now it can: > > - decode vmx instructions, vmx determination and vmx MSRs reading is > supported > > - handle interrupts, exceptions, vm exits due to cr 0/4 exits, cr shadowing > is supported > > - run bios POST and some amount of guest code in VirtualBox (tested on 5+ > version). Current problem here is a strange wish of hypervisor to change > processor mode in vmx non-root to vm86 and find ill_op there. I have no > ideas, why VirtualBox wants it (may be someone knows?). > > - configure guest in kvm, but guest can't run due to #PF which kvm can't > handle right on my realization. Details: when kvm configures guest and > enters in it, #PF with 0xfe05b address happens. Kvm goes to handle #PF. > kvm_mmu_page_fault goes to nonpaging_page_fault, which don't find page in > cache and calls nonpaging_map. nonpaging_map exits after critical section > before out_unlock label. For me reaction looks normal, but I didn't dig > deeper. After #PF handling kvm enters to guest again and falls to kvm again > with #PF on 0xfe05b. This situation repeats infinitely. > > > > If somebody have an interest in subject, he can find sources here > https://github.com/ispras/qemu.git , branch vmx.
If you want more attention I suggest sending an RFC patch series to [email protected]. Guidelines for submitting patches are here: http://qemu-project.org/Contribute/SubmitAPatch Stefan
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