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Re: [Qemu-devel] [Bug?] Guest pause because VMPTRLD failed in KVM
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From: |
gong lei |
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Subject: |
Re: [Qemu-devel] [Bug?] Guest pause because VMPTRLD failed in KVM |
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Date: |
Sun, 20 Nov 2016 08:58:06 +0000 |
On 2016/11/17 20:39, Paolo Bonzini wrote:
>
> On 10/11/2016 15:10, gong lei wrote:
>> 4) The isssue can't be reporduced. I search the Intel VMX sepc about
>> reaseons
>> of vmptrld failure:
>> The instruction fails if its operand is not properly aligned, sets
>> unsupported physical-address bits, or is equal to the VMXON
>> pointer. In addition, the instruction fails if the 32 bits in memory
>> referenced by the operand do not match the VMCS
>> revision identifier supported by this processor.
>>
>> But I can't find any cues from the KVM source code. It seems each
>> error conditions is impossible in theory. :(
> Yes, it should not happen. :(
>
> If it's not reproducible, it's really hard to say what it was, except a
> random memory corruption elsewhere or even a bit flip (!).
>
> Paolo
Thanks for your reply, Paolo :)
--
Regards,
-Gonglei