qdev-monitor: print the device's clock with info qtree

This prints the clocks attached to a DeviceState when using
"info qtree" monitor command. For every clock, it displays the
direction, the name and if the clock is forwarded. For input clock,
it displays also the frequency.

This is based on the original work of Frederic Konrad.

Here follows a sample of `info qtree` output on xilinx_zynq machine
after linux boot with only one uart clocked:
> bus: main-system-bus
>  type System
>  [...]
>  dev: cadence_uart, id ""
>    gpio-out "sysbus-irq" 1
>    clock-in "refclk" freq_hz=0.000000e+00
>    chardev = ""
>    mmio 00000000e0001000/0000000000001000
>  dev: cadence_uart, id ""
>    gpio-out "sysbus-irq" 1
>    clock-in "refclk" freq_hz=1.375661e+07
>    chardev = "serial0"
>    mmio 00000000e0000000/0000000000001000
>  [...]
>  dev: xilinx,zynq_slcr, id ""
>    clock-out "uart1_ref_clk" freq_hz=0.000000e+00
>    clock-out "uart0_ref_clk" freq_hz=1.375661e+07
>    clock-in "ps_clk" freq_hz=3.333333e+07
>    mmio 00000000f8000000/0000000000001000

Signed-off-by: Damien Hedde <damien.hedde@greensocs.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20200406135251.157596-10-damien.hedde@greensocs.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/qdev-monitor.c b/qdev-monitor.c
index 9833b33549690257b01653ee7a8dac2b6d5c541e..56cee1483fa716430f886af51524774a5c5e11ef 100644 (file)
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -38,6 +38,7 @@
 #include "migration/misc.h"
 #include "migration/migration.h"
 #include "qemu/cutils.h"
+#include "hw/clock.h"
 
 /*
  * Aliases were a bad idea from the start.  Let's keep them
@@ -737,6 +738,7 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
     ObjectClass *class;
     BusState *child;
     NamedGPIOList *ngl;
+    NamedClockList *ncl;
 
     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
                 dev->id ? dev->id : "");
@@ -751,6 +753,13 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
                         ngl->num_out);
         }
     }
+    QLIST_FOREACH(ncl, &dev->clocks, node) {
+        qdev_printf("clock-%s%s \"%s\" freq_hz=%e\n",
+                    ncl->output ? "out" : "in",
+                    ncl->alias ? " (alias)" : "",
+                    ncl->name,
+                    CLOCK_PERIOD_TO_HZ(1.0 * clock_get(ncl->clock)));
+    }
     class = object_get_class(OBJECT(dev));
     do {
         qdev_print_props(mon, dev, DEVICE_CLASS(class)->props_, indent);