Re: [PATCH v3 09/21] KVM: X86: Don't track dirty for KVM_SET_[TSS_ADDR|IDENTITY_MAP_ADDR]

[Paolo Bonzini]

On 09/01/20 15:57, Peter Xu wrote:
> -int __x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa, u32 size)
> +/*
> + * If `uaddr' is specified, `*uaddr' will be returned with the
> + * userspace address that was just allocated.  `uaddr' is only
> + * meaningful if the function returns zero, and `uaddr' will only be
> + * valid when with either the slots_lock or with the SRCU read lock
> + * held.  After we release the lock, the returned `uaddr' will be invalid.
> + */

In practice the address is still protected by the refcount, isn't it?
Only destroying the VM could invalidate it.

Paolo