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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>
This commit is contained in:
Damien Hedde 2020-04-06 15:52:51 +02:00 committed by Peter Maydell
parent 5b49a34c68
commit 9f2ff99c7f
1 changed files with 9 additions and 0 deletions
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9
qdev-monitor.c
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@ -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);