powerpc/xmon: Allow passing an argument to ppc_md.restart()

On PowerNV a few different kinds of reboot are supported. We'd like to be
able to exercise these from xmon so allow 'zr' to take an argument, and
pass that to the ppc_md.restart() function.

Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191101085522.3055-1-oohall@gmail.com

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 03d2307..e8c84d2 100644 (file)
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -1192,16 +1192,19 @@ static int do_step(struct pt_regs *regs)
 
 static void bootcmds(void)
 {
+       char tmp[64];
        int cmd;
 
        cmd = inchar();
-       if (cmd == 'r')
-               ppc_md.restart(NULL);
-       else if (cmd == 'h')
+       if (cmd == 'r') {
+               getstring(tmp, 64);
+               ppc_md.restart(tmp);
+       } else if (cmd == 'h') {
                ppc_md.halt();
-       else if (cmd == 'p')
+       } else if (cmd == 'p') {
                if (pm_power_off)
                        pm_power_off();
+       }
 }
 
 static int cpu_cmd(void)