summaryrefslogtreecommitdiff
path: root/drivers/tee
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2022-05-05 15:56:54 +0200
committerArnd Bergmann <arnd@arndb.de>2022-05-05 15:56:54 +0200
commita37de2ad8e2d0982329fdb8ec1021abf040ac53f (patch)
tree4213f6b126762e8a0f38c4e4460af81b229873ca /drivers/tee
parenta964ecd8a70a72577a5e1ca3ec4b74029e953ee9 (diff)
parent3e47235eaee09488c7e467b9aaccb7c93c862c6b (diff)
Merge tag 'tee-shm-vmalloc-for-v5.19' of https://git.linaro.org/people/jens.wiklander/linux-tee into arm/drivers
TEE accept vmalloc()ed buffers for tee_shm_register_kernel_buf() * tag 'tee-shm-vmalloc-for-v5.19' of https://git.linaro.org/people/jens.wiklander/linux-tee: tee: make tee_shm_register_kernel_buf vmalloc supported Link: https://lore.kernel.org/r/20220503192916.GA3288817@jade Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/tee')
-rw-r--r--drivers/tee/optee/call.c2
-rw-r--r--drivers/tee/tee_shm.c35
2 files changed, 26 insertions, 11 deletions
diff --git a/drivers/tee/optee/call.c b/drivers/tee/optee/call.c
index bd49ec934060..2082e632adff 100644
--- a/drivers/tee/optee/call.c
+++ b/drivers/tee/optee/call.c
@@ -362,7 +362,7 @@ int optee_check_mem_type(unsigned long start, size_t num_pages)
* Allow kernel address to register with OP-TEE as kernel
* pages are configured as normal memory only.
*/
- if (virt_addr_valid(start))
+ if (virt_addr_valid(start) || is_vmalloc_addr((void *)start))
return 0;
mmap_read_lock(mm);
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c
index f31e29e8f1ca..836872467dc6 100644
--- a/drivers/tee/tee_shm.c
+++ b/drivers/tee/tee_shm.c
@@ -23,21 +23,36 @@ static void shm_put_kernel_pages(struct page **pages, size_t page_count)
static int shm_get_kernel_pages(unsigned long start, size_t page_count,
struct page **pages)
{
- struct kvec *kiov;
size_t n;
int rc;
- kiov = kcalloc(page_count, sizeof(*kiov), GFP_KERNEL);
- if (!kiov)
- return -ENOMEM;
+ if (is_vmalloc_addr((void *)start)) {
+ struct page *page;
- for (n = 0; n < page_count; n++) {
- kiov[n].iov_base = (void *)(start + n * PAGE_SIZE);
- kiov[n].iov_len = PAGE_SIZE;
- }
+ for (n = 0; n < page_count; n++) {
+ page = vmalloc_to_page((void *)(start + PAGE_SIZE * n));
+ if (!page)
+ return -ENOMEM;
+
+ get_page(page);
+ pages[n] = page;
+ }
+ rc = page_count;
+ } else {
+ struct kvec *kiov;
+
+ kiov = kcalloc(page_count, sizeof(*kiov), GFP_KERNEL);
+ if (!kiov)
+ return -ENOMEM;
- rc = get_kernel_pages(kiov, page_count, 0, pages);
- kfree(kiov);
+ for (n = 0; n < page_count; n++) {
+ kiov[n].iov_base = (void *)(start + n * PAGE_SIZE);
+ kiov[n].iov_len = PAGE_SIZE;
+ }
+
+ rc = get_kernel_pages(kiov, page_count, 0, pages);
+ kfree(kiov);
+ }
return rc;
}