libsys: allow for grant preallocation

Since the grant table is allocated dynamically, a system service always
runs the risk of running out of memory at run time when trying to
allocate a grant.  In order to allow services to mitigate that risk,
grants can now be preallocated, typically at system service startup,
using the new cpf_prealloc(3) libsys function.  The function takes a
'count' parameter that indicates the number of additional grants to
preallocate.  Thus, the function may be called from multiple submodules
within a service, each preallocating their own maximum of grants that
it may need at run time.

Change-Id: I6904726a722a8c27dfe2efa470e683718f310272

0 files changed, 0 insertions, 0 deletions