PR sync from: liangtian liangtian13@huawei.com
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/7S42O2S4ANYLGXBVPDHZD53BBJNPFIQE/
Create debugfs entry for vcpu stat.

chenjiajun (6):
kvm: debugfs: Export vcpu stat via debugfs
kvm: debugfs: export remaining aarch64 kvm exit reasons to debugfs
kvm: debugfs: aarch64 export cpu time related items to debugfs
kvm: debugfs: Export x86 kvm exits to vcpu_stat
kvm: debugfs: add fastpath msr_wr exits to debugfs statistics
kvm: debugfs: add EXIT_REASON_PREEMPTION_TIMER to vcpu_stat

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2.33.0

#I919BF:【OLK-6.6】补丁回合：vcpu_stat导出至debugfs特性