A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

tee: add tee_shm_alloc_kernel_buf()

Browse source 
commit dc7019b7d0e188d4093b34bd0747ed0d668c63bf upstream.

Adds a new function tee_shm_alloc_kernel_buf() to allocate shared memory
from a kernel driver. This function can later be made more lightweight
by unnecessary dma-buf export.

Cc: [email protected]
Reviewed-by: Tyler Hicks <[email protected]>
Reviewed-by: Sumit Garg <[email protected]>
Signed-off-by: Jens Wiklander <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Jens Wiklander 2021-06-14 17:33:14 -05:00 • committed by Greg Kroah-Hartman
commit 0572199b78
2 changed files with 19 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

18
drivers/tee/tee_shm.c
View file

@ -219,6 +219,24 @@ struct tee_shm *tee_shm_priv_alloc(struct tee_device *teedev, size_t size)
}
EXPORT_SYMBOL_GPL(tee_shm_priv_alloc);
/**
* tee_shm_alloc_kernel_buf() - Allocate shared memory for kernel buffer
* @ctx: Context that allocates the shared memory
* @size: Requested size of shared memory
*
* The returned memory registered in secure world and is suitable to be
* passed as a memory buffer in parameter argument to
* tee_client_invoke_func(). The memory allocated is later freed with a
* call to tee_shm_free().
*
* @returns a pointer to 'struct tee_shm'
*/
struct tee_shm *tee_shm_alloc_kernel_buf(struct tee_context *ctx, size_t size)
{
return tee_shm_alloc(ctx, size, TEE_SHM_MAPPED | TEE_SHM_DMA_BUF);
}
EXPORT_SYMBOL_GPL(tee_shm_alloc_kernel_buf);
struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
size_t length, u32 flags)
{