aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/staging/android/fiq_debugger/fiq_debugger.c87
-rw-r--r--drivers/tty/sysrq.c3
-rw-r--r--include/linux/sysrq.h1
3 files changed, 57 insertions, 34 deletions
diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger.c b/drivers/staging/android/fiq_debugger/fiq_debugger.c
index 1d733624d..ceb45bc9e 100644
--- a/drivers/staging/android/fiq_debugger/fiq_debugger.c
+++ b/drivers/staging/android/fiq_debugger/fiq_debugger.c
@@ -30,6 +30,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp.h>
+#include <linux/sysrq.h>
#include <linux/timer.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
@@ -395,7 +396,7 @@ static void fiq_debugger_work(struct work_struct *work)
cmd += 6;
while (*cmd == ' ')
cmd++;
- if (cmd != '\0')
+ if ((cmd != '\0') && sysrq_on())
kernel_restart(cmd);
else
kernel_restart(NULL);
@@ -425,30 +426,39 @@ static void fiq_debugger_irq_exec(struct fiq_debugger_state *state, char *cmd)
static void fiq_debugger_help(struct fiq_debugger_state *state)
{
fiq_debugger_printf(&state->output,
- "FIQ Debugger commands:\n"
- " pc PC status\n"
- " regs Register dump\n"
- " allregs Extended Register dump\n"
- " bt Stack trace\n");
- fiq_debugger_printf(&state->output,
- " reboot [<c>] Reboot with command <c>\n"
- " reset [<c>] Hard reset with command <c>\n"
- " irqs Interupt status\n"
- " kmsg Kernel log\n"
- " version Kernel version\n");
- fiq_debugger_printf(&state->output,
- " sleep Allow sleep while in FIQ\n"
- " nosleep Disable sleep while in FIQ\n"
- " console Switch terminal to console\n"
- " cpu Current CPU\n"
- " cpu <number> Switch to CPU<number>\n");
+ "FIQ Debugger commands:\n");
+ if (sysrq_on()) {
+ fiq_debugger_printf(&state->output,
+ " pc PC status\n"
+ " regs Register dump\n"
+ " allregs Extended Register dump\n"
+ " bt Stack trace\n");
+ fiq_debugger_printf(&state->output,
+ " reboot [<c>] Reboot with command <c>\n"
+ " reset [<c>] Hard reset with command <c>\n"
+ " irqs Interrupt status\n"
+ " kmsg Kernel log\n"
+ " version Kernel version\n");
+ fiq_debugger_printf(&state->output,
+ " cpu Current CPU\n"
+ " cpu <number> Switch to CPU<number>\n"
+ " sysrq sysrq options\n"
+ " sysrq <param> Execute sysrq with <param>\n");
+ } else {
+ fiq_debugger_printf(&state->output,
+ " reboot Reboot\n"
+ " reset Hard reset\n"
+ " irqs Interrupt status\n");
+ }
fiq_debugger_printf(&state->output,
- " ps Process list\n"
- " sysrq sysrq options\n"
- " sysrq <param> Execute sysrq with <param>\n");
+ " sleep Allow sleep while in FIQ\n"
+ " nosleep Disable sleep while in FIQ\n"
+ " console Switch terminal to console\n"
+ " ps Process list\n");
#ifdef CONFIG_KGDB
- fiq_debugger_printf(&state->output,
- " kgdb Enter kernel debugger\n");
+ if (fiq_kgdb_enable) {
+ fiq_debugger_printf(&state->output,
+ " kgdb Enter kernel debugger\n");
#endif
}
@@ -480,18 +490,23 @@ static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
fiq_debugger_help(state);
} else if (!strcmp(cmd, "pc")) {
- fiq_debugger_dump_pc(&state->output, regs);
+ if (sysrq_on())
+ fiq_debugger_dump_pc(&state->output, regs);
} else if (!strcmp(cmd, "regs")) {
- fiq_debugger_dump_regs(&state->output, regs);
+ if (sysrq_on())
+ fiq_debugger_dump_regs(&state->output, regs);
} else if (!strcmp(cmd, "allregs")) {
- fiq_debugger_dump_allregs(&state->output, regs);
+ if (sysrq_on())
+ fiq_debugger_dump_allregs(&state->output, regs);
} else if (!strcmp(cmd, "bt")) {
- fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp);
+ if (sysrq_on())
+ fiq_debugger_dump_stacktrace(&state->output, regs,
+ 100, svc_sp);
} else if (!strncmp(cmd, "reset", 5)) {
cmd += 5;
while (*cmd == ' ')
cmd++;
- if (*cmd) {
+ if (*cmd && sysrq_on()) {
char tmp_cmd[32];
strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd));
machine_restart(tmp_cmd);
@@ -501,9 +516,12 @@ static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
} else if (!strcmp(cmd, "irqs")) {
fiq_debugger_dump_irqs(state);
} else if (!strcmp(cmd, "kmsg")) {
- fiq_debugger_dump_kernel_log(state);
+ if (sysrq_on())
+ fiq_debugger_dump_kernel_log(state);
} else if (!strcmp(cmd, "version")) {
- fiq_debugger_printf(&state->output, "%s\n", linux_banner);
+ if (sysrq_on())
+ fiq_debugger_printf(&state->output, "%s\n",
+ linux_banner);
} else if (!strcmp(cmd, "sleep")) {
state->no_sleep = false;
fiq_debugger_printf(&state->output, "enabling sleep\n");
@@ -515,14 +533,17 @@ static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
fiq_debugger_uart_flush(state);
state->console_enable = true;
} else if (!strcmp(cmd, "cpu")) {
- fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
- } else if (!strncmp(cmd, "cpu ", 4)) {
+ if (sysrq_on())
+ fiq_debugger_printf(&state->output, "cpu %d\n",
+ state->current_cpu);
+ } else if (!strncmp(cmd, "cpu ", 4) && sysrq_on()) {
unsigned long cpu = 0;
if (strict_strtoul(cmd + 4, 10, &cpu) == 0)
fiq_debugger_switch_cpu(state, cpu);
else
fiq_debugger_printf(&state->output, "invalid cpu\n");
- fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu);
+ fiq_debugger_printf(&state->output, "cpu %d\n",
+ state->current_cpu);
} else {
if (state->debug_busy) {
fiq_debugger_printf(&state->output,
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c
index b51c15408..08c9406ca 100644
--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -55,10 +55,11 @@ static bool __read_mostly sysrq_always_enabled;
unsigned short platform_sysrq_reset_seq[] __weak = { KEY_RESERVED };
int sysrq_reset_downtime_ms __weak;
-static bool sysrq_on(void)
+bool sysrq_on(void)
{
return sysrq_enabled || sysrq_always_enabled;
}
+EXPORT_SYMBOL(sysrq_on);
/*
* A value of 1 means 'all', other nonzero values are an op mask:
diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h
index 7faf933cc..5a0bd938c 100644
--- a/include/linux/sysrq.h
+++ b/include/linux/sysrq.h
@@ -45,6 +45,7 @@ struct sysrq_key_op {
* are available -- else NULL's).
*/
+bool sysrq_on(void);
void handle_sysrq(int key);
void __handle_sysrq(int key, bool check_mask);
int register_sysrq_key(int key, struct sysrq_key_op *op);
generated by cgit v1.2.3 (git 2.39.1) at 2026-03-14 07:18:27 +0000