This module is allow testing secure calls of SMAF.
Signed-off-by: Benjamin Gaignard benjamin.gaignard@linaro.org --- drivers/smaf/Kconfig | 6 +++ drivers/smaf/Makefile | 1 + drivers/smaf/smaf-fakesecure.c | 92 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 99 insertions(+) create mode 100644 drivers/smaf/smaf-fakesecure.c
diff --git a/drivers/smaf/Kconfig b/drivers/smaf/Kconfig index 058ec4c..fd17005 100644 --- a/drivers/smaf/Kconfig +++ b/drivers/smaf/Kconfig @@ -9,3 +9,9 @@ config SMAF_CMA depends on SMAF && HAVE_DMA_ATTRS help Choose this option to enable CMA allocation within SMAF + +config SMAF_FAKE_SECURE + tristate "SMAF fake secure module" + depends on SMAF + help + Choose this option to enable fake secure module for test purpose diff --git a/drivers/smaf/Makefile b/drivers/smaf/Makefile index 05bab01..00d5cd4 100644 --- a/drivers/smaf/Makefile +++ b/drivers/smaf/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_SMAF) += smaf-core.o obj-$(CONFIG_SMAF_CMA) += smaf-cma.o +obj-$(CONFIG_SMAF_FAKE_SECURE) += smaf-fakesecure.o diff --git a/drivers/smaf/smaf-fakesecure.c b/drivers/smaf/smaf-fakesecure.c new file mode 100644 index 0000000..75e12dd --- /dev/null +++ b/drivers/smaf/smaf-fakesecure.c @@ -0,0 +1,92 @@ +/* + * smaf-fakesecure.c + * + * Copyright (C) Linaro SA 2015 + * Author: Benjamin Gaignard benjamin.gaignard@linaro.org for Linaro. + * License terms: GNU General Public License (GPL), version 2 + */ +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/smaf-secure.h> + +#define MAGIC 0xDEADBEEF + +struct fake_private { + int magic; +}; + +static void *smaf_fakesecure_create(void) +{ + struct fake_private *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + priv->magic = MAGIC; + + return priv; +} + +static int smaf_fakesecure_destroy(void *ctx) +{ + struct fake_private *priv = (struct fake_private *)ctx; + + WARN_ON(!priv || (priv->magic != MAGIC)); + kfree(priv); + + return 0; +} + +static bool smaf_fakesecure_grant_access(void *ctx, + struct device *dev, + size_t addr, size_t size, + enum dma_data_direction direction) +{ + struct fake_private *priv = (struct fake_private *)ctx; + + WARN_ON(!priv || (priv->magic != MAGIC)); + + return priv->magic == MAGIC; +} + +static void smaf_fakesecure_revoke_access(void *ctx, + struct device *dev, + size_t addr, size_t size, + enum dma_data_direction direction) +{ + struct fake_private *priv = (struct fake_private *)ctx; + + WARN_ON(!priv || (priv->magic != MAGIC)); +} + +static bool smaf_fakesecure_allow_cpu_access(void *ctx, + enum dma_data_direction direction) +{ + struct fake_private *priv = (struct fake_private *)ctx; + + WARN_ON(!priv || (priv->magic != MAGIC)); + + return priv->magic == MAGIC; +} + +static struct smaf_secure fake = { + .create_ctx = smaf_fakesecure_create, + .destroy_ctx = smaf_fakesecure_destroy, + .grant_access = smaf_fakesecure_grant_access, + .revoke_access = smaf_fakesecure_revoke_access, + .allow_cpu_access = smaf_fakesecure_allow_cpu_access, +}; + +static int __init smaf_fakesecure_init(void) +{ + return smaf_register_secure(&fake); +} +module_init(smaf_fakesecure_init); + +static void __exit smaf_fakesecure_deinit(void) +{ + smaf_unregister_secure(&fake); +} +module_exit(smaf_fakesecure_deinit); + +MODULE_DESCRIPTION("SMAF fake secure module for test purpose"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Benjamin Gaignard benjamin.gaignard@linaro.org");