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tee: add cancellation support to client interface

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Add support of cancellation request to the TEE kernel internal
client interface. Can be used by software TPM drivers, that leverage
TEE under the hood (for instance TPM2.0 mobile profile), for requesting
cancellation of time-consuming operations (RSA key-pair generation etc.).

Signed-off-by: Igor Opaniuk <[email protected]>
Signed-off-by: Jens Wiklander <[email protected]>
This commit is contained in:
Igor Opaniuk 2019-01-24 19:32:31 +02:00 • committed by Jens Wiklander
commit 4f062dc1b7
2 changed files with 21 additions and 0 deletions
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9
drivers/tee/tee_core.c
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@ -1039,6 +1039,15 @@ int tee_client_invoke_func(struct tee_context *ctx,
}
EXPORT_SYMBOL_GPL(tee_client_invoke_func);
int tee_client_cancel_req(struct tee_context *ctx,
struct tee_ioctl_cancel_arg *arg)
{
if (!ctx->teedev->desc->ops->cancel_req)
return -EINVAL;
return ctx->teedev->desc->ops->cancel_req(ctx, arg->cancel_id,
arg->session);
}
static int tee_client_device_match(struct device *dev,
struct device_driver *drv)
{