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| author | Rijo Thomas <Rijo-john.Thomas@amd.com> | 2019-12-27 06:24:02 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-04 06:49:51 +0100 |
| commit | bade7e1fbd34f46462e6eb1db5474832a4144ac2 (patch) | |
| tree | c3c35b39cf2bdc10b841bc0ca21df3844ca74f09 /drivers/tee | |
| parent | tee: add AMD-TEE driver (diff) | |
| download | linux-bade7e1fbd34f46462e6eb1db5474832a4144ac2.tar.xz linux-bade7e1fbd34f46462e6eb1db5474832a4144ac2.zip | |
tee: amdtee: check TEE status during driver initialization
The AMD-TEE driver should check if TEE is available before
registering itself with TEE subsystem. This ensures that
there is a TEE which the driver can talk to before proceeding
with tee device node allocation.
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Co-developed-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Devaraj Rangasamy <Devaraj.Rangasamy@amd.com>
Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Reviewed-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/amdtee/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c index dd360f378ef0..9d0cee1c837f 100644 --- a/drivers/tee/amdtee/core.c +++ b/drivers/tee/amdtee/core.c @@ -16,6 +16,7 @@ #include <linux/firmware.h> #include "amdtee_private.h" #include "../tee_private.h" +#include <linux/psp-tee.h> static struct amdtee_driver_data *drv_data; static DEFINE_MUTEX(session_list_mutex); @@ -438,6 +439,10 @@ static int __init amdtee_driver_init(void) struct tee_shm_pool *pool = ERR_PTR(-EINVAL); int rc; + rc = psp_check_tee_status(); + if (rc) + goto err_fail; + drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL); if (IS_ERR(drv_data)) return -ENOMEM; @@ -485,6 +490,7 @@ err_kfree_drv_data: kfree(drv_data); drv_data = NULL; +err_fail: pr_err("amd-tee driver initialization failed\n"); return rc; } |