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Re: [Qemu-devel] [Question] Seabios HANGs when mmio wirte in a nested vm
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From: |
Xulei (Stone) |
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Subject: |
Re: [Qemu-devel] [Question] Seabios HANGs when mmio wirte in a nested vmware host wtih virito-scsi controller |
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Date: |
Mon, 17 Jul 2017 07:34:35 +0000 |
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...