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| author |   Volodymyr Babchuk <vlad.babchuk@gmail.com> | 2017-11-29 14:48:36 +0200 |
|---|---|---|
| committer |   Jens Wiklander <jens.wiklander@linaro.org> | 2017-12-15 13:36:17 +0100 |
| commit | f58e236c9d665ad0af99c908de4a9b6f07e74dda (patch) | |
| tree | 582adc8b1612ca8f18a3260155883ad7c78e8ac8 /drivers/tee/tee_shm.c | |
| parent | tee: optee: add optee-specific shared pool implementation (diff) | |
| download | linux-dev-f58e236c9d665ad0af99c908de4a9b6f07e74dda.tar.xz linux-dev-f58e236c9d665ad0af99c908de4a9b6f07e74dda.zip | |
tee: optee: enable dynamic SHM support
Previous patches added various features that are needed for dynamic SHM.
Dynamic SHM allows Normal World to share any buffers with OP-TEE.
While original design suggested to use pre-allocated region (usually of
1M to 2M of size), this new approach allows to use all non-secure RAM for
command buffers, RPC allocations and TA parameters.
This patch checks capability OPTEE_SMC_SEC_CAP_DYNAMIC_SHM. If it was set
by OP-TEE, then kernel part of OP-TEE will use kernel page allocator
to allocate command buffers. Also it will set TEE_GEN_CAP_REG_MEM
capability to tell userspace that it supports shared memory registration.
Signed-off-by: Volodymyr Babchuk <vlad.babchuk@gmail.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/tee_shm.c')
0 files changed, 0 insertions, 0 deletions