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| author | Jens Wiklander <jens.wiklander@linaro.org> | 2016-12-23 13:13:34 +0100 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2017-11-29 10:37:13 +0100 |
| commit | f2aa97240c84b8f258710e297ba60048bd9c153e (patch) | |
| tree | fe2a175a3e8c59927a2ba414c01f060027703fc7 /drivers/tee | |
| parent | 84debcc53533f162bf11f24e6a503d227c175cbe (diff) | |
| download | linux-next-f2aa97240c84b8f258710e297ba60048bd9c153e.tar.gz | |
tee: add TEE_IOCTL_PARAM_ATTR_META
Adds TEE_IOCTL_PARAM_ATTR_META which can be used to indicate meta
parameters when communicating with user space. These meta parameters can
be used by supplicant support multiple parallel requests at a time.
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/optee/supp.c | 25 | ||||
| -rw-r--r-- | drivers/tee/tee_core.c | 16 |
2 files changed, 35 insertions, 6 deletions
diff --git a/drivers/tee/optee/supp.c b/drivers/tee/optee/supp.c index b4ea0678a436..56aa8b929b8c 100644 --- a/drivers/tee/optee/supp.c +++ b/drivers/tee/optee/supp.c @@ -119,6 +119,27 @@ u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params, return ret; } +static int supp_check_recv_params(size_t num_params, struct tee_param *params) +{ + size_t n; + + /* + * If there's memrefs we need to decrease those as they where + * increased earlier and we'll even refuse to accept any below. + */ + for (n = 0; n < num_params; n++) + if (tee_param_is_memref(params + n) && params[n].u.memref.shm) + tee_shm_put(params[n].u.memref.shm); + + /* + * We only expect parameters as TEE_IOCTL_PARAM_ATTR_TYPE_NONE (0). + */ + for (n = 0; n < num_params; n++) + if (params[n].attr) + return -EINVAL; + return 0; +} + /** * optee_supp_recv() - receive request for supplicant * @ctx: context receiving the request @@ -137,6 +158,10 @@ int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params, struct optee_supp *supp = &optee->supp; int rc; + rc = supp_check_recv_params(*num_params, param); + if (rc) + return rc; + /* * In case two threads in one supplicant is calling this function * simultaneously we need to protect the data with a mutex which diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index c78104589e42..4d0ce606f0fc 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -152,11 +152,11 @@ static int params_from_user(struct tee_context *ctx, struct tee_param *params, return -EFAULT; /* All unused attribute bits has to be zero */ - if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK) + if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_MASK) return -EINVAL; params[n].attr = ip.attr; - switch (ip.attr) { + switch (ip.attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) { case TEE_IOCTL_PARAM_ATTR_TYPE_NONE: case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: break; @@ -394,8 +394,8 @@ static int params_to_supp(struct tee_context *ctx, struct tee_ioctl_param ip; struct tee_param *p = params + n; - ip.attr = p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK; - switch (p->attr) { + ip.attr = p->attr; + switch (p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) { case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT: case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: ip.a = p->u.value.a; @@ -459,6 +459,10 @@ static int tee_ioctl_supp_recv(struct tee_context *ctx, if (!params) return -ENOMEM; + rc = params_from_user(ctx, params, num_params, uarg->params); + if (rc) + goto out; + rc = ctx->teedev->desc->ops->supp_recv(ctx, &func, &num_params, params); if (rc) goto out; @@ -488,11 +492,11 @@ static int params_from_supp(struct tee_param *params, size_t num_params, return -EFAULT; /* All unused attribute bits has to be zero */ - if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK) + if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_MASK) return -EINVAL; p->attr = ip.attr; - switch (ip.attr) { + switch (ip.attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) { case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT: case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT: /* Only out and in/out values can be updated */ |