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| author | Xiang Xiao <xiaoxiang781216@gmail.com> | 2018-11-07 16:26:01 +0100 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2019-01-07 08:02:13 +0100 |
| commit | 60042a22be4e8e565db0a82acb84ee4b348b17c9 (patch) | |
| tree | 91cabe58829c0ae6be1f55e535dd57ea9bbb4471 /drivers/remoteproc | |
| parent | Linux 5.0-rc1 (diff) | |
| download | linux-60042a22be4e8e565db0a82acb84ee4b348b17c9.tar.xz linux-60042a22be4e8e565db0a82acb84ee4b348b17c9.zip | |
remoteproc: debug: add crash debugfs node
so we can trigger the crash manully which could:
1.test the crash handling code path more easily
2.update the firmware without reboot kernel
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc_debugfs.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c index e90135c64af0..f330a9ad014f 100644 --- a/drivers/remoteproc/remoteproc_debugfs.c +++ b/drivers/remoteproc/remoteproc_debugfs.c @@ -155,6 +155,30 @@ static const struct file_operations rproc_recovery_ops = { .llseek = generic_file_llseek, }; +/* expose the crash trigger via debugfs */ +static ssize_t +rproc_crash_write(struct file *filp, const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct rproc *rproc = filp->private_data; + unsigned int type; + int ret; + + ret = kstrtouint_from_user(user_buf, count, 0, &type); + if (ret < 0) + return ret; + + rproc_report_crash(rproc, type); + + return count; +} + +static const struct file_operations rproc_crash_ops = { + .write = rproc_crash_write, + .open = simple_open, + .llseek = generic_file_llseek, +}; + /* Expose resource table content via debugfs */ static int rproc_rsc_table_show(struct seq_file *seq, void *p) { @@ -325,6 +349,8 @@ void rproc_create_debug_dir(struct rproc *rproc) rproc, &rproc_name_ops); debugfs_create_file("recovery", 0400, rproc->dbg_dir, rproc, &rproc_recovery_ops); + debugfs_create_file("crash", 0200, rproc->dbg_dir, + rproc, &rproc_crash_ops); debugfs_create_file("resource_table", 0400, rproc->dbg_dir, rproc, &rproc_rsc_table_ops); debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir, |