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tee: optee: Fix dynamic shm pool allocations 

In case of dynamic shared memory pool, kernel memory allocated using
dmabuf_mgr pool needs to be registered with OP-TEE prior to its usage
during optee_open_session() or optee_invoke_func().

So fix dmabuf_mgr pool allocations via an additional call to
optee_shm_register().

Also, allow kernel pages to be registered as shared memory with OP-TEE.

Fixes: 9733b072a1 ("optee: allow to work without static shared memory")
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Sumit Garg 2019-11-08 16:57:14 +05:30 committed by Jens Wiklander
parent 4f5cafb5cb
commit a249dd200d
2 changed files with 18 additions and 1 deletions
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7
drivers/tee/optee/call.c
View File

@ -554,6 +554,13 @@ static int check_mem_type(unsigned long start, size_t num_pages)
struct mm_struct *mm = current->mm;
int rc;
/*
* Allow kernel address to register with OP-TEE as kernel
* pages are configured as normal memory only.
*/
if (virt_addr_valid(start))
return 0;
down_read(&mm->mmap_sem);
rc = __check_mem_type(find_vma(mm, start),
start + num_pages * PAGE_SIZE);

12
drivers/tee/optee/shm_pool.c
View File

@ -17,6 +17,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
{
unsigned int order = get_order(size);
struct page *page;
int rc = 0;
page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!page)
@ -26,12 +27,21 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
shm->paddr = page_to_phys(page);
shm->size = PAGE_SIZE << order;
return 0;
if (shm->flags & TEE_SHM_DMA_BUF) {
shm->flags |= TEE_SHM_REGISTER;
rc = optee_shm_register(shm->ctx, shm, &page, 1 << order,
(unsigned long)shm->kaddr);
}
return rc;
}
static void pool_op_free(struct tee_shm_pool_mgr *poolm,
struct tee_shm *shm)
{
if (shm->flags & TEE_SHM_DMA_BUF)
optee_shm_unregister(shm->ctx, shm);
free_pages((unsigned long)shm->kaddr, get_order(shm->size));
shm->kaddr = NULL;
}