On 23.04.2025 13:22, Julien Grall wrote:
> On 22/04/2025 22:54, dm...@proton.me wrote:
>> --- a/xen/common/domain.c
>> +++ b/xen/common/domain.c
>> @@ -66,6 +66,57 @@ DEFINE_RCU_READ_LOCK(domlist_read_lock);
>> static struct domain *domain_hash[DOMAIN_HASH_SIZE];
>> struct domain *domain_list;
>>
>> +/* Domain ID allocator */
>> +static unsigned int domid_last;
>> +
>> +static inline bool is_free_domid(domid_t dom)
>> +{
>> + struct domain *d = rcu_lock_domain_by_id(dom);
>> +
>> + if ( d )
>> + rcu_unlock_domain(d);
>> +
>> + return !d;
>> +}
>> +
>> +/*
>> + * Allocate new domain ID based on the hint.
>
> Maybe clarify this should not be used for system domains?
But those don't have their IDs allocated; they're pre-determined and outside
of the range available for allocation.
Jan
