/* Trap into the TrustZone, and call funcs there. */
static int __secure_tz_reset_entry2(unsigned int *scm_data, u32 size_scm_data,
bool is_64)
{
int ret;
/* sync memory before sending the commands to tz*/
__iowmb();
if (!is_64) {
spin_lock(&tz_lock);
ret = scm_call_atomic2(SCM_SVC_IO, TZ_RESET_ID, scm_data[0],
scm_data[1]);
spin_unlock(&tz_lock);
} else {
if (is_scm_armv8()) {
struct scm_desc desc = {0};
desc.arginfo = 0;
ret = scm_call2(SCM_SIP_FNID(SCM_SVC_DCVS,
TZ_RESET_ID_64), &desc);
} else {
ret = scm_call(SCM_SVC_DCVS, TZ_RESET_ID_64, scm_data,
size_scm_data, NULL, 0);
}
}
return ret;
}
void msm_disable_wdog_debug(void)
{
int ret;
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART, 1, 0);
if (ret)
pr_err("failed to disable wdog debug: %d\n", ret);
}
void msm_enable_wdog_debug(void)
{
int ret;
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART, 0, BOOT_PART_EN_VAL);
if (ret)
pr_err("failed to enable wdog debug: %d\n", ret);
}
/* Trap into the TrustZone, and call funcs there. */
static int __secure_tz_entry(u32 cmd, u32 val, u32 id)
{
int ret;
spin_lock(&tz_lock);
__iowmb();
ret = scm_call_atomic2(SCM_SVC_IO, cmd, val, id);
spin_unlock(&tz_lock);
return ret;
}
/* Trap into the TrustZone, and call funcs there. */
static int __secure_tz_entry2(u32 cmd, u32 val1, u32 val2)
{
int ret;
spin_lock(&tz_lock);
/* sync memory before sending the commands to tz*/
__iowmb();
ret = scm_call_atomic2(SCM_SVC_IO, cmd, val1, val2);
spin_unlock(&tz_lock);
return ret;
}
static int simulate_secure_wdog_bite(void)
{ int ret;
struct scm_desc desc = {
.args[0] = 0,
.arginfo = SCM_ARGS(1),
};
pr_emerg("simulating secure watch dog bite using scm_call\n");
if (!is_scm_armv8())
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_SVC_SEC_WDOG_TRIG, 0, 0);
else
ret = scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_BOOT,
SCM_SVC_SEC_WDOG_TRIG), &desc);
/* if we hit, scm_call has failed */
pr_emerg("simulation of secure watch dog bite failed\n");
return ret;
}
#else
int simulate_secure_wdog_bite(void)
{
return 0;
}
#endif
#if defined(CONFIG_ARCH_MSM8226) || defined(CONFIG_ARCH_MSM8974)
/*
* Misc data structures needed for simulating bus timeout in
* camera
*/
#define HANG_ADDRESS 0xfda10000
struct clk_pair {
const char *dev;
const char *clk;
};
static struct clk_pair bus_timeout_camera_clocks_on[] = {
/*
* gcc_mmss_noc_cfg_ahb_clk should be on but right
* now this clock is on by default and not accessable.
* Update this table if gcc_mmss_noc_cfg_ahb_clk is
* ever not enabled by default!
*/
{
.dev = "fda0c000.qcom,cci",
.clk = "camss_top_ahb_clk",
},
{
.dev = "fda10000.qcom,vfe",
void sec_do_bypass_sdi_execution_in_low(void)
{
int ret;
struct scm_desc desc = {
.args[0] = 1,
.args[1] = 0,
.arginfo = SCM_ARGS(2),
};
/* Needed to bypass debug image on some chips */
if (!is_scm_armv8())
ret = scm_call_atomic2(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART, 1, 0);
else
ret = scm_call2_atomic(SCM_SIP_FNID(SCM_SVC_BOOT,
SCM_WDOG_DEBUG_BOOT_PART), &desc);
if (ret)
pr_err("Failed to disable wdog debug: %d\n", ret);
}
int __init sec_debug_init(void)
{
int ret;
ret=sec_dt_addr_init();
if (ret<0)
return ret;
register_reboot_notifier(&nb_reboot_block);
atomic_notifier_chain_register(&panic_notifier_list, &nb_panic_block);
if (!enable) {
sec_do_bypass_sdi_execution_in_low();
return -EPERM;
}
#ifdef CONFIG_SEC_DEBUG_SCHED_LOG
__init_sec_debug_log();
#endif
sec_debug_set_upload_magic(SECDEBUG_MODE);
sec_debug_set_upload_cause(UPLOAD_CAUSE_INIT);
return 0;
}
/* Trap into the TrustZone, and call funcs there. */
static int __secure_tz_reset_entry2(unsigned int *scm_data, u32 size_scm_data,
bool is_64)
{
int ret;
/* sync memory before sending the commands to tz*/
__iowmb();
if (!is_64) {
spin_lock(&tz_lock);
ret = scm_call_atomic2(SCM_SVC_IO, TZ_RESET_ID, scm_data[0],
scm_data[1]);
spin_unlock(&tz_lock);
} else {
ret = scm_call(SCM_SVC_DCVS, TZ_RESET_ID_64, scm_data,
size_scm_data, NULL, 0);
}
return ret;
}
static void __secure_writel(u32 v, u32 addr)
{
__iowmb();
scm_call_atomic2(SCM_SVC_IO, SCM_IO_WRITE, addr, v);
}
static long smcmod_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int ret = 0;
/* sanity check */
if (!argp)
return -EINVAL;
/*
* The SMC instruction should only be initiated by one process
* at a time, hence the critical section here. Note that this
* does not prevent user space from modifying the
* allocated buffer contents. Extra steps are needed to
* prevent that from happening.
*/
mutex_lock(&ioctl_lock);
ret = smcmod_ioctl_check(cmd);
if (ret)
goto cleanup;
switch (cmd) {
case SMCMOD_IOCTL_SEND_REG_CMD:
{
struct smcmod_reg_req req;
/* copy struct from user */
if (copy_from_user((void *)&req, argp, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
/* call the correct scm function to switch to secure
* world
*/
if (req.num_args == 1) {
req.return_val =
scm_call_atomic1(req.service_id,
req.command_id, req.args[0]);
} else if (req.num_args == 2) {
req.return_val =
scm_call_atomic2(req.service_id,
req.command_id, req.args[0],
req.args[1]);
} else {
ret = -EINVAL;
goto cleanup;
}
/* copy result back to user */
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
/* This is an example of how to pass buffers to/from the secure
* side using the ion driver.
*/
case SMCMOD_IOCTL_SEND_BUF_CMD:
{
struct smcmod_buf_req req;
/* copy struct from user */
if (copy_from_user((void *)&req, argp, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
/* send the command */
ret = smcmod_send_buf_cmd(&req);
if (ret < 0)
goto cleanup;
/* copy result back to user */
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
case SMCMOD_IOCTL_SEND_CIPHER_CMD:
{
struct smcmod_cipher_req req;
/* copy struct from user */
if (copy_from_user((void *)&req, argp, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
ret = smcmod_send_cipher_cmd(&req);
if (ret < 0)
goto cleanup;
/* copy result back to user */
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
case SMCMOD_IOCTL_SEND_MSG_DIGEST_CMD:
{
struct smcmod_msg_digest_req req;
/* copy struct from user */
if (copy_from_user((void *)&req, argp, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
ret = smcmod_send_msg_digest_cmd(&req);
if (ret < 0)
goto cleanup;
/* copy result back to user */
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
case SMCMOD_IOCTL_GET_VERSION:
{
uint32_t req;
/* call scm function to switch to secure world */
req = scm_get_version();
/* copy result back to user */
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
case SMCMOD_IOCTL_SEND_DECRYPT_CMD:
{
struct smcmod_decrypt_req req;
if (copy_from_user((void *)&req, argp, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
ret = smcmod_send_dec_cmd(&req);
if (ret < 0)
goto cleanup;
if (copy_to_user(argp, (void *)&req, sizeof(req))) {
ret = -EFAULT;
goto cleanup;
}
}
break;
default:
ret = -EINVAL;
}
cleanup:
mutex_unlock(&ioctl_lock);
return ret;
}