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| author |   Rijo Thomas <Rijo-john.Thomas@amd.com> | 2019-12-27 10:54:02 +0530 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-04 13:49:51 +0800 |
| commit | bade7e1fbd34f46462e6eb1db5474832a4144ac2 (patch) | |
| tree | c3c35b39cf2bdc10b841bc0ca21df3844ca74f09 /drivers/crypto | |
| parent | tee: add AMD-TEE driver (diff) | |
| download | linux-dev-bade7e1fbd34f46462e6eb1db5474832a4144ac2.tar.xz linux-dev-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/crypto')
| -rw-r--r-- | drivers/crypto/ccp/tee-dev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/tee-dev.c b/drivers/crypto/ccp/tee-dev.c index 555c8a7c5684..5e697a90ea7f 100644 --- a/drivers/crypto/ccp/tee-dev.c +++ b/drivers/crypto/ccp/tee-dev.c @@ -362,3 +362,14 @@ int psp_tee_process_cmd(enum tee_cmd_id cmd_id, void *buf, size_t len, return 0; } EXPORT_SYMBOL(psp_tee_process_cmd); + +int psp_check_tee_status(void) +{ + struct psp_device *psp = psp_get_master_device(); + + if (!psp || !psp->tee_data) + return -ENODEV; + + return 0; +} +EXPORT_SYMBOL(psp_check_tee_status); |