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authorXiang Xiao <xiaoxiang781216@gmail.com>2018-11-07 23:26:01 +0800
committerBjorn Andersson <bjorn.andersson@linaro.org>2019-01-06 23:02:13 -0800
commit60042a22be4e8e565db0a82acb84ee4b348b17c9 (patch)
tree91cabe58829c0ae6be1f55e535dd57ea9bbb4471
parentbfeffd155283772bbe78c6a05dec7c0128ee500c (diff)
downloadlinux-60042a22be4e8e565db0a82acb84ee4b348b17c9.tar.gz
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>
-rw-r--r--drivers/remoteproc/remoteproc_debugfs.c26
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,