Re: [Tee-dev] [RFC v2 2/6] tee: enable support to register kernel memory
From: Stuart Yoder <hidden>
Date: 2019-08-08 22:27:03
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On 7/30/19 7:23 AM, Sumit Garg wrote:
quoted hunk ↗ jump to hunk
@@ -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