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| author | Sumit Garg <sumit.garg@linaro.org> | 2019-01-29 11:19:35 +0530 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2019-02-01 15:12:46 +0100 |
| commit | 0fc1db9d105915021260eb241661b8e96f5c0f1a (patch) | |
| tree | 5e5d608e2a01aaeec416ade44d47036638ad7289 /scripts/mod | |
| parent | 42bf4152d8a79f89f5456dee63a1f364fbce2dd6 (diff) | |
| download | linux-0fc1db9d105915021260eb241661b8e96f5c0f1a.tar.gz | |
tee: add bus driver framework for TEE based devices
Introduce a generic TEE bus driver concept for TEE based kernel drivers which would like to communicate with TEE based devices/services. Also add support in module device table for these new TEE based devices. In this TEE bus concept, devices/services are identified via Universally Unique Identifier (UUID) and drivers register a table of device UUIDs which they can support. So this TEE bus framework registers following apis: - match(): Iterates over the driver UUID table to find a corresponding match for device UUID. If a match is found, then this particular device is probed via corresponding probe api registered by the driver. This process happens whenever a device or a driver is registered with TEE bus. - uevent(): Notifies user-space (udev) whenever a new device is registered on this bus for auto-loading of modularized drivers. Also this framework allows for device enumeration to be specific to corresponding TEE implementation like OP-TEE etc. Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Reviewed-by: Bhupesh Sharma <bhsharma@redhat.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'scripts/mod')
| -rw-r--r-- | scripts/mod/devicetable-offsets.c | 3 | ||||
| -rw-r--r-- | scripts/mod/file2alias.c | 19 |
2 files changed, 22 insertions, 0 deletions
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index 293004499b4d..160718383a71 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -225,5 +225,8 @@ int main(void) DEVID_FIELD(typec_device_id, svid); DEVID_FIELD(typec_device_id, mode); + DEVID(tee_client_device_id); + DEVID_FIELD(tee_client_device_id, uuid); + return 0; } diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index a37af7d71973..d0e41723627f 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -37,6 +37,9 @@ typedef unsigned char __u8; typedef struct { __u8 b[16]; } uuid_le; +typedef struct { + __u8 b[16]; +} uuid_t; /* Big exception to the "don't include kernel headers into userspace, which * even potentially has different endianness and word sizes, since @@ -1287,6 +1290,21 @@ static int do_typec_entry(const char *filename, void *symval, char *alias) return 1; } +/* Looks like: tee:uuid */ +static int do_tee_entry(const char *filename, void *symval, char *alias) +{ + DEF_FIELD(symval, tee_client_device_id, uuid); + + sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", + uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4], + uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9], + uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14], + uuid.b[15]); + + add_wildcard(alias); + return 1; +} + /* Does namelen bytes of name exactly match the symbol? */ static bool sym_is(const char *name, unsigned namelen, const char *symbol) { @@ -1357,6 +1375,7 @@ static const struct devtable devtable[] = { {"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry}, {"tbsvc", SIZE_tb_service_id, do_tbsvc_entry}, {"typec", SIZE_typec_device_id, do_typec_entry}, + {"tee", SIZE_tee_client_device_id, do_tee_entry}, }; /* Create MODULE_ALIAS() statements. |