Hi Jeshwank,
On Wed, 25 Oct 2023 at 12:27, jeshwank JESHWANTHKUMAR.NK@amd.com wrote:
From: Jeshwanth Kumar N K JESHWANTHKUMAR.NK@amd.com
At present, the shared memory for TEE ring buffer, command buffer and data buffer is allocated using get_free_pages(). The driver shares the physical address of these buffers with PSP so that it can be mapped by the Trusted OS.
In this patch series we have replaced get_free_pages() with dma_alloc_coherent() to allocate shared memory to cleanup the existing allocation method.
Thanks for putting this together but I can't find the reasoning behind this change neither in this commit message and nor in the patch descriptions. Care to explain why?
-Sumit
Rijo Thomas (3): crypto: ccp - Add function to allocate and free memory using DMA APIs crypto: ccp - Use psp_tee_alloc_buffer() and psp_tee_free_buffer() tee: amdtee: Use psp_tee_alloc_buffer() and psp_tee_free_buffer()
drivers/crypto/ccp/psp-dev.c | 3 + drivers/crypto/ccp/tee-dev.c | 119 ++++++++++++++++++---------- drivers/crypto/ccp/tee-dev.h | 11 +-- drivers/tee/amdtee/amdtee_private.h | 18 ++--- drivers/tee/amdtee/call.c | 74 ++++++++--------- drivers/tee/amdtee/core.c | 72 ++++++++++------- drivers/tee/amdtee/shm_pool.c | 21 ++--- include/linux/psp-tee.h | 47 +++++++++++ 8 files changed, 221 insertions(+), 144 deletions(-)
-- 2.25.1