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drivers: tee: sandbox: SCP03 control emulator

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Adds support for a working SCP03 emulation. Input parameters are
validated however the commands (enable, provision) executed by the TEE
are assumed to always succeed.

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jorge Ramirez-Ortiz 2021-02-14 16:27:25 +01:00 committed by Tom Rini
parent 26839e5dde
commit 5a8783c80c
2 changed files with 59 additions and 1 deletions
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6
drivers/tee/optee/Kconfig
View file

@ -31,6 +31,12 @@ config OPTEE_TA_RPC_TEST
permits to test reverse RPC calls to TEE supplicant. Should
be used only in sandbox env.
config OPTEE_TA_SCP03
bool "Support SCP03 TA"
default y
help
Enables support for controlling (enabling, provisioning) the
Secure Channel Protocol 03 operation in the OP-TEE SCP03 TA.
endmenu
endif

54
drivers/tee/sandbox.c
View file

@ -8,6 +8,7 @@
#include <tee.h>
#include <tee/optee_ta_avb.h>
#include <tee/optee_ta_rpc_test.h>
#include <tee/optee_ta_scp03.h>
#include "optee/optee_msg.h"
#include "optee/optee_private.h"
@ -68,6 +69,7 @@ void *optee_alloc_and_init_page_list(void *buf, ulong len,
return NULL;
}
#if defined(CONFIG_OPTEE_TA_SCP03) || defined(CONFIG_OPTEE_TA_AVB)
static u32 get_attr(uint n, uint num_params, struct tee_param *params)
{
if (n >= num_params)
@ -79,7 +81,7 @@ static u32 get_attr(uint n, uint num_params, struct tee_param *params)
static u32 check_params(u8 p0, u8 p1, u8 p2, u8 p3, uint num_params,
struct tee_param *params)
{
u8 p[] = { p0, p1, p2, p3};
u8 p[] = { p0, p1, p2, p3 };
uint n;
for (n = 0; n < ARRAY_SIZE(p); n++)
@ -97,6 +99,50 @@ bad_params:
return TEE_ERROR_BAD_PARAMETERS;
}
#endif
#ifdef CONFIG_OPTEE_TA_SCP03
static u32 pta_scp03_open_session(struct udevice *dev, uint num_params,
struct tee_param *params)
{
/*
* We don't expect additional parameters when opening a session to
* this TA.
*/
return check_params(TEE_PARAM_ATTR_TYPE_NONE, TEE_PARAM_ATTR_TYPE_NONE,
TEE_PARAM_ATTR_TYPE_NONE, TEE_PARAM_ATTR_TYPE_NONE,
num_params, params);
}
static u32 pta_scp03_invoke_func(struct udevice *dev, u32 func, uint num_params,
struct tee_param *params)
{
u32 res;
static bool enabled;
switch (func) {
case PTA_CMD_ENABLE_SCP03:
res = check_params(TEE_PARAM_ATTR_TYPE_VALUE_INPUT,
TEE_PARAM_ATTR_TYPE_NONE,
TEE_PARAM_ATTR_TYPE_NONE,
TEE_PARAM_ATTR_TYPE_NONE,
num_params, params);
if (res)
return res;
if (!enabled) {
enabled = true;
} else {
}
if (params[0].u.value.a)
return TEE_SUCCESS;
default:
return TEE_ERROR_NOT_SUPPORTED;
}
}
#endif
#ifdef CONFIG_OPTEE_TA_AVB
static u32 ta_avb_open_session(struct udevice *dev, uint num_params,
@ -357,6 +403,12 @@ static const struct ta_entry ta_entries[] = {
.invoke_func = ta_rpc_test_invoke_func,
},
#endif
#ifdef CONFIG_OPTEE_TA_SCP03
{ .uuid = PTA_SCP03_UUID,
.open_session = pta_scp03_open_session,
.invoke_func = pta_scp03_invoke_func,
},
#endif
};
static void sandbox_tee_get_version(struct udevice *dev,