michaelh/zephyr
1
0
Fork 0
Code Releases Activity

mem_domain: inherit from parent thread

Browse source 
New threads inherit any memory domain membership held by the
parent thread.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2017-10-16 09:12:47 -07:00 • committed by Andrew Boie
commit 0bf9d33602
2 changed files with 8 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
doc/kernel/usermode/memory_domain.rst
View file

@ -23,7 +23,8 @@ Memory partitions are defined by a set of underlying MPU regions
or MMU tables. A thread belongs to a single memory domain at
any point in time but a memory domain may contain multiple threads.
Threads in the same memory domain have the same access permissions
to the memory partitions belong to the memory domain.
to the memory partitions belonging to the memory domain. New threads
will inherit any memory domain configuration from the parent thread.
Implementation
**************

6
kernel/thread.c
View file

@ -273,6 +273,12 @@ void _setup_new_thread(struct k_thread *new_thread,
/* Any given thread has access to itself */
k_object_access_grant(new_thread, new_thread);
/* New threads inherit any memory domain membership by the parent */
if (_current->mem_domain_info.mem_domain) {
k_mem_domain_add_thread(_current->mem_domain_info.mem_domain,
new_thread);
}
if (options & K_INHERIT_PERMS) {
_thread_perms_inherit(_current, new_thread);
}