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SubjectRe: [Tee-dev] [RFC v2 2/6] tee: enable support to register kernel memory
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On 7/30/19 7:23 AM, Sumit Garg wrote:

> @@ -264,7 +266,17 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
> goto err;
> }
>
> - rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages);
> + if (flags & TEE_SHM_USER_MAPPED) {
> + rc = get_user_pages_fast(start, num_pages, FOLL_WRITE,
> + shm->pages);
> + } else {
> + const struct kvec kiov = {
> + .iov_base = (void *)start,
> + .iov_len = PAGE_SIZE
> + };
> +
> + rc = get_kernel_pages(&kiov, num_pages, 0, shm->pages);

Passing a single kvec struct is temporary I assume? Because as currently
written this will only work with num_pages==1.

Stuart

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