summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBenjamin Gaignard <benjamin.gaignard@linaro.org>2016-05-09 16:41:01 +0200
committerBenjamin Gaignard <benjamin.gaignard@linaro.org>2016-05-09 16:41:01 +0200
commit421909790deb03ee7b97900c5e112b4d68c66857 (patch)
treea356306fb96501170949b68d5ac62e7cec50dbb9
parent03e42e54de70a6fadcc1b3fa51262ab00ec8c867 (diff)
downloadkernel-smaf_v7.tar.gz
SMAF: add fake secure modulesmaf_v7
This module is allow testing secure calls of SMAF. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
-rw-r--r--drivers/smaf/Kconfig6
-rw-r--r--drivers/smaf/Makefile1
-rw-r--r--drivers/smaf/smaf-fakesecure.c85
3 files changed, 92 insertions, 0 deletions
diff --git a/drivers/smaf/Kconfig b/drivers/smaf/Kconfig
index 058ec4c34577..fd17005a2f83 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 05bab01bf17d..00d5cd439633 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 000000000000..5f3d355cbe31
--- /dev/null
+++ b/drivers/smaf/smaf-fakesecure.c
@@ -0,0 +1,85 @@
+/*
+ * 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));
+ pr_debug("grant requested by device %s\n",
+ dev->driver ? dev->driver->name : "cpu");
+
+ 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));
+ pr_debug("revoke requested by device %s\n",
+ dev->driver ? dev->driver->name : "cpu");
+}
+
+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,
+};
+
+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>");