[SeaBIOS] [Qemu-devel] [Question] Seabios HANGs when mmio wirte in a nested vmware host wtih virito-scsi controller

[Xiao Guangrong]

On 07/17/2017 03:34 PM, Xulei (Stone) wrote:
> 
>     On 07/17/2017 11:13 AM, Xulei (Stone) wrote:
> 
>      >>                              |--virtio_queue_empty
>      >>
>      >> Then, kmod falls in infinite loop in handle EPT_MISCONFIG.
>      >> As far as i know, when kvm enters guest after handling EPT_MISCONFIG, seabios should return
>      >> from mmio write and wait for virtio backend(qemu) to handle this mmio writing.
>      >> What puzzles me:
>      >> 1) i can not understand why kvm runs in infinite loop and seabios does not return from writew.
> 
>        >From the trace in L1 guest, it did not hang in KVM, as it went into guest mode normally.
> 
>      >> 2) kvm nested kvm is ok. But vmware nested kvm is not ok. This problem has anything related
>      >>     with vmware?
>      >>
> 
>      > It is the issue in vmware, i guess the RIP register is not handled correctly.
>      > BTW, does kvm unit tests run well on nested vmware?
> 
>     Sadly, kvm unit tests run fail on nested vmware and make the  CentOS 7.3(with kmod 4.4.11) crashed...
> 

Well, so that should be reported to vmware. :-)