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remoteproc: Change default dump configuration to "disabled" 

Currently "default" configuration option means coredumps are
enabled. To avoid confusion rename the "default" configuration
option to "enabled" and disable collection of dumps by default
as doing so makes sense for production devices.

Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
Link: https://lore.kernel.org/r/1601662144-5964-2-git-send-email-rishabhb@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Rishabh Bhatnagar 2020-10-02 11:09:02 -07:00 committed by Bjorn Andersson
parent ea47c6887b
commit bf41a0910c
3 changed files with 17 additions and 18 deletions
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6
drivers/remoteproc/remoteproc_coredump.c
View File

@ -257,7 +257,7 @@ void rproc_coredump(struct rproc *rproc)
* directly read from device memory.
*/
data_size += elf_size_of_phdr(class);
if (dump_conf == RPROC_COREDUMP_DEFAULT)
if (dump_conf == RPROC_COREDUMP_ENABLED)
data_size += segment->size;
phnum++;
@ -297,14 +297,14 @@ void rproc_coredump(struct rproc *rproc)
elf_phdr_set_p_flags(class, phdr, PF_R | PF_W | PF_X);
elf_phdr_set_p_align(class, phdr, 0);
if (dump_conf == RPROC_COREDUMP_DEFAULT)
if (dump_conf == RPROC_COREDUMP_ENABLED)
rproc_copy_segment(rproc, data + offset, segment, 0,
segment->size);
offset += elf_phdr_get_p_filesz(class, phdr);
phdr += elf_size_of_phdr(class);
}
if (dump_conf == RPROC_COREDUMP_DEFAULT) {
if (dump_conf == RPROC_COREDUMP_ENABLED) {
dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
return;
}

21
drivers/remoteproc/remoteproc_debugfs.c
View File

@ -33,9 +33,9 @@ static struct dentry *rproc_dbg;
* enum rproc_coredump_mechanism
*/
static const char * const rproc_coredump_str[] = {
[RPROC_COREDUMP_DEFAULT] = "default",
[RPROC_COREDUMP_INLINE] = "inline",
[RPROC_COREDUMP_DISABLED] = "disabled",
[RPROC_COREDUMP_ENABLED] = "enabled",
[RPROC_COREDUMP_INLINE] = "inline",
};
/* Expose the current coredump configuration via debugfs */
@ -54,20 +54,19 @@ static ssize_t rproc_coredump_read(struct file *filp, char __user *userbuf,
/*
* By writing to the 'coredump' debugfs entry, we control the behavior of the
* coredump mechanism dynamically. The default value of this entry is "default".
* coredump mechanism dynamically. The default value of this entry is "disabled".
*
* The 'coredump' debugfs entry supports these commands:
*
* default: This is the default coredump mechanism. When the remoteproc
* crashes the entire coredump will be copied to a separate buffer
* and exposed to userspace.
* disabled: By default coredump collection is disabled. Recovery will
* proceed without collecting any dump.
*
* enabled: When the remoteproc crashes the entire coredump will be copied
* to a separate buffer and exposed to userspace.
*
* inline: The coredump will not be copied to a separate buffer and the
* recovery process will have to wait until data is read by
* userspace. But this avoid usage of extra memory.
*
* disabled: This will disable coredump. Recovery will proceed without
* collecting any dump.
*/
static ssize_t rproc_coredump_write(struct file *filp,
const char __user *user_buf, size_t count,
@ -96,10 +95,10 @@ static ssize_t rproc_coredump_write(struct file *filp,
if (!strncmp(buf, "disabled", count)) {
rproc->dump_conf = RPROC_COREDUMP_DISABLED;
} else if (!strncmp(buf, "enabled", count)) {
rproc->dump_conf = RPROC_COREDUMP_ENABLED;
} else if (!strncmp(buf, "inline", count)) {
rproc->dump_conf = RPROC_COREDUMP_INLINE;
} else if (!strncmp(buf, "default", count)) {
rproc->dump_conf = RPROC_COREDUMP_DEFAULT;
} else {
dev_err(&rproc->dev, "Invalid coredump configuration\n");
err = -EINVAL;

8
include/linux/remoteproc.h
View File

@ -442,16 +442,16 @@ enum rproc_crash_type {
/**
* enum rproc_dump_mechanism - Coredump options for core
* @RPROC_COREDUMP_DEFAULT: Copy dump to separate buffer and carry on with
* @RPROC_COREDUMP_DISABLED: Don't perform any dump
* @RPROC_COREDUMP_ENABLED: Copy dump to separate buffer and carry on with
recovery
* @RPROC_COREDUMP_INLINE: Read segments directly from device memory. Stall
recovery until all segments are read
* @RPROC_COREDUMP_DISABLED: Don't perform any dump
*/
enum rproc_dump_mechanism {
RPROC_COREDUMP_DEFAULT,
RPROC_COREDUMP_INLINE,
RPROC_COREDUMP_DISABLED,
RPROC_COREDUMP_ENABLED,
RPROC_COREDUMP_INLINE,
};
/**