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| author |   Sumit Garg <sumit.garg@linaro.org> | 2021-06-14 17:33:15 -0500 |
|---|---|---|
| committer |   Jens Wiklander <jens.wiklander@linaro.org> | 2021-07-21 07:55:50 +0200 |
| commit | 376e4199e327a5cf29b8ec8fb0f64f3d8b429819 (patch) | |
| tree | 77dbe6218db409a2179fb212d9ea40270c75c8c9 /drivers/tee/tee_shm.c | |
| parent | tee: add tee_shm_alloc_kernel_buf() (diff) | |
| download | linux-dev-376e4199e327a5cf29b8ec8fb0f64f3d8b429819.tar.xz linux-dev-376e4199e327a5cf29b8ec8fb0f64f3d8b429819.zip | |
tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag
Currently TEE_SHM_DMA_BUF flag has been inappropriately used to not
register shared memory allocated for private usage by underlying TEE
driver: OP-TEE in this case. So rather add a new flag as TEE_SHM_PRIV
that can be utilized by underlying TEE drivers for private allocation
and usage of shared memory.
With this corrected, allow tee_shm_alloc_kernel_buf() to allocate a
shared memory region without the backing of dma-buf.
Cc: stable@vger.kernel.org
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Co-developed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Signed-off-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/tee_shm.c')
| -rw-r--r-- | drivers/tee/tee_shm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index c65e44707cd6..8a9384a64f3e 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -117,7 +117,7 @@ struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags) return ERR_PTR(-EINVAL); } - if ((flags & ~(TEE_SHM_MAPPED | TEE_SHM_DMA_BUF))) { + if ((flags & ~(TEE_SHM_MAPPED | TEE_SHM_DMA_BUF | TEE_SHM_PRIV))) { dev_err(teedev->dev.parent, "invalid shm flags 0x%x", flags); return ERR_PTR(-EINVAL); } @@ -207,7 +207,7 @@ EXPORT_SYMBOL_GPL(tee_shm_alloc); */ 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); + return tee_shm_alloc(ctx, size, TEE_SHM_MAPPED); } EXPORT_SYMBOL_GPL(tee_shm_alloc_kernel_buf); |