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| H A D | tee_pager.c | 13616e886edc3680c03cdd455fa53fee5a9cba6d Mon Jan 25 10:39:05 UTC 2021 Jens Wiklander <jens.wiklander@linaro.org> core: pager: support paging of tag and IV
Adds support for paging of the tag and IV protecting some read-write
fobjs. The tag and IV needed to decrypt/encrypt a page are accessed by
the pager. Since the pager can't handle page fault caused by itself
special measures are taken to make sure that the needed tag and IV are
accessible when needed.
tee_pager_get_page() and tee_pager_load_page() are replaced by
pager_get_page() which does what the previous functions used plus the
additional logic to handle paging of tag and IV.
A new function tee_pager_init_iv_area() is added. It enables
registration of a read/write paged fobj spanning the area used for
storing all tags and IVs. This fobj must store its tags and IVs in
unpaged memory, for instance the heap.
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
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