RTEMS | Add aarch64 cpukit paravirtualization support (!211)

[Joel Sherrill (@joel)]

Joel Sherrill commented on a discussion on cpukit/score/cpu/aarch64/include/rtems/score/paravirt.h: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/211#note_112423

 > +#endif
 > +
 > +#ifndef _RTEMS_SCORE_PARAVIRT_H
 > +#define _RTEMS_SCORE_PARAVIRT_H
 > +
 > +/**
 > + * @defgroup RTEMSScoreCPUARMParavirt ARM Paravirtualization Support
 > + *
 > + * @ingroup RTEMSScoreCPUARM
 > + *
 > + * This handler encapulates the functionality (primarily conditional
 > + * feature defines) related to paravirtualization on the ARM.
 > + *
 > + * Paravirtualization on the ARM makes the following assumptions:
 > + *
 > + *   - RTEMS executes in user space

RTEMS is run in user mode in this environment so yes. It is at EL0. 

I just copied their reply.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/211#note_112423
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