KVM: arm64: Add kvm_vcpu_arch::cpus_ptr and pre_cpus_ptr

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I62Q2L


CVE: NA

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We already have cpus_ptr in current thread struct now, through which we can
know the pcpu range the thread is allowed to run on. So in
kvm_arch_vcpu_{load,put}, we can also know the pcpu range the vcpu thread
is allowed to be scheduled on, and that is the range we want to configure
for TLBI broadcast.

Introduce two variables cpus_ptr and pre_cpus_ptr in struct kvm_vcpu_arch.
@cpus_ptr always comes from current->cpus_ptr and @pre_cpus_ptr always
comes from @cpus_ptr.

Signed-off-by: Quan Zhou <zhouquan65@huawei.com>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Nianyao Tang <tangnianyao@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>