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Add perf kvm support for PVM #8

@ljrcore

Description

@ljrcore

Currently, PVM does not support perf kvm. If you use perf kvm stat live, this output will appear.

Analyze events for all VMs, all VCPUs:

             VM-EXIT    Samples  Samples%     Time%    Min Time    Max Time         Avg time 

              INVLPG      18940    68.75%     4.34%      0.73us 104499.10us     45.88us ( +-  13.51% )
unknown kvm exit code:131072 on VMX
             UNKNOWN       3622    13.15%    86.12%      0.34us 1663159.36us   4765.94us ( +-  18.58% )
unknown kvm exit code:327680 on VMX
             UNKNOWN       2057     7.47%     5.16%      0.85us  72083.56us    502.57us ( +-  12.41% )
unknown kvm exit code:196608 on VMX
             UNKNOWN       1401     5.09%     0.50%      0.52us  27967.64us     72.22us ( +-  35.47% )
unknown kvm exit code:262144 on VMX
             UNKNOWN       1233     4.48%     3.85%      0.65us 515077.40us    625.29us ( +-  68.43% )
                INVD        181     0.66%     0.02%      1.44us   2817.51us     25.10us ( +-  63.36% )
unknown kvm exit code:65536 on VMX
             UNKNOWN        115     0.42%     0.01%      0.85us   1400.33us     14.54us ( +-  83.75% )

Total Samples:27549, Total events handled time:20043311.08us.

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