[PATCH v2 00/12] "Task_isolation" mode

[Alex Belits]

This is the updated version of task isolation patchset.

1. Commit messages updated to match changes.
2. Sign-off lines restored from original patches, changes listed wherever applicable.
3. arm platform -- added missing calls to syscall check and cleanup procedure after leaving isolation.
4. x86 platform -- added missing calls to cleanup procedure after leaving isolation.