On Tue, May 31, 2022 at 06:09:16PM +0200, Etienne Carriere wrote:
Changes implementation when using TEE dynamically allocated shared memory to synchronize with the Linux implementation where the legacy SMT protocol cannot be used with such memory since it is expected from device mapped memory whereas OP-TEE shared memory is cached and hence should not be accessed using memcpy_toio()/memcpy_fromio().
This change implements the MSG shared memory protocol introduced in Linux [1]. The protocol uses a simplified SMT header of 32bit named MSG_SMT to carry SCMI protocol information and uses side channel means to carry exchanged buffer size information, as TEE invocation API parameters when used in the SCMI OP-TEE transport.
Link: [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... Signed-off-by: Etienne Carriere etienne.carriere@linaro.org
For the series, applied to u-boot/next, thanks!