Re: KVM_SET_NESTED_STATE not yet stable

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On 10.07.19 22:31, Jan Kiszka wrote:
> And on a Xeon D-1540, I'm not seeing a crash but a kvm entry failure when
> resetting L1 while running Jailhouse:
> 
> KVM: entry failed, hardware error 0x7
> EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000f61
> ESI=00000000 EDI=00000000 EBP=00000000 ESP=00000000
> EIP=0000fff0 EFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> ES =0000 00000000 0000ffff 00009300
> CS =f000 ffff0000 0000ffff 00a09b00
> SS =0000 00000000 0000ffff 00c09300
> DS =0000 00000000 0000ffff 00009300
> FS =0000 00000000 0000ffff 00009300
> GS =0000 00000000 0000ffff 00009300
> LDT=0000 00000000 0000ffff 00008200
> TR =0000 00000000 0000ffff 00008b00
> GDT=     00000000 0000ffff
> IDT=     00000000 0000ffff
> CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000680
> DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
> DR6=00000000ffff0ff0 DR7=0000000000000400
> EFER=0000000000000000
> Code=00 66 89 d8 66 e8 af a1 ff ff 66 83 c4 0c 66 5b 66 5e 66 c3 <ea> 5b e0 00
> f0 30 36 2f 32 33 2f 39 39 00 fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 

OK, looks like the feature diff was a red herring: Ralf found a server with even
more features and without a crash, and I found familiar error messages in the
kernel log of that Xeon D:

kvm: vmptrld           (null)/778000000000 failed
kvm: vmclear fail:           (null)/778000000000

Only difference: No crash, just that more graceful entry failure.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux



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