Re: [Qemu-devel] [PATCH V2 05/10] qdev-monitor: print the device's clock with info qtree

["Cédric Le Goater" <clg@kaod.org>]

On 01/26/2017 10:47 AM, fred.konrad@greensocs.com wrote:
> From: KONRAD Frederic <fred.konrad@greensocs.com>
> 
> This prints the clock attached to a DeviceState when using "info qtree" monitor
> command.

It would be nice to print the bound clocks also.  

And so, may be, we could handle this binding between clocks
simply by using object_property_add_child() on the objects 
and build a QOM clock hierarchy. 

I would certainly make sense from a physical POV but would 
that be possible ? 

Thanks,

C.   


> For example:
> 
> bus: main-system-bus
>   type System
>   dev: xlnx.zynqmp_crf, id ""
>     gpio-out "sysbus-irq" 1
>     gpio-out "RST_A9" 4
>     qemu-clk "dbg_trace" 0.0
>     qemu-clk "vpll_to_lpd" 12500000.0
>     qemu-clk "dp_stc_ref" 0.0
>     qemu-clk "dpll_to_lpd" 12500000.0
>     qemu-clk "acpu_clk" 0.0
>     qemu-clk "pcie_ref" 0.0
>     qemu-clk "topsw_main" 0.0
>     qemu-clk "topsw_lsbus" 0.0
>     qemu-clk "dp_audio_ref" 0.0
>     qemu-clk "sata_ref" 0.0
>     qemu-clk "dp_video_ref" 1428571.4
>     qemu-clk "vpll_clk" 50000000.0
>     qemu-clk "apll_to_lpd" 12500000.0
>     qemu-clk "dpll_clk" 50000000.0
>     qemu-clk "gpu_ref" 0.0
>     qemu-clk "aux_refclk" 0.0
>     qemu-clk "video_clk" 27000000.0
>     qemu-clk "gdma_ref" 0.0
>     qemu-clk "gt_crx_ref_clk" 0.0
>     qemu-clk "dbg_fdp" 0.0
>     qemu-clk "apll_clk" 50000000.0
>     qemu-clk "pss_alt_ref_clk" 0.0
>     qemu-clk "ddr" 0.0
>     qemu-clk "pss_ref_clk" 50000000.0
>     qemu-clk "dpdma_ref" 0.0
>     qemu-clk "dbg_tstmp" 0.0
>     mmio 00000000fd1a0000/000000000000010c
> 
> Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
> ---
>  include/qemu/qemu-clock.h |  9 +++++++++
>  qdev-monitor.c            |  2 ++
>  qemu-clock.c              | 28 ++++++++++++++++++++++++++++
>  3 files changed, 39 insertions(+)
> 
> diff --git a/include/qemu/qemu-clock.h b/include/qemu/qemu-clock.h
> index 45f8766..ccc381c 100644
> --- a/include/qemu/qemu-clock.h
> +++ b/include/qemu/qemu-clock.h
> @@ -149,4 +149,13 @@ void qemu_clk_set_callback(qemu_clk clk,
>                             QEMUClkRateUpdateCallback *cb,
>                             void *opaque);
>  
> +/**
> + * qemu_clk_print:
> + * @dev: the device for which the clock need to be printed.
> + *
> + * Print the clock information for a given device.
> + *
> + */
> +void qemu_clk_print(Monitor *mon, DeviceState *dev, int indent);
> +
>  #endif /* QEMU_CLOCK_H */
> diff --git a/qdev-monitor.c b/qdev-monitor.c
> index c73410c..8f6bbdf 100644
> --- a/qdev-monitor.c
> +++ b/qdev-monitor.c
> @@ -29,6 +29,7 @@
>  #include "qemu/error-report.h"
>  #include "qemu/help_option.h"
>  #include "sysemu/block-backend.h"
> +#include "qemu/qemu-clock.h"
>  
>  /*
>   * Aliases were a bad idea from the start.  Let's keep them
> @@ -689,6 +690,7 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
>                          ngl->num_out);
>          }
>      }
> +    qemu_clk_print(mon, dev, indent);
>      class = object_get_class(OBJECT(dev));
>      do {
>          qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
> diff --git a/qemu-clock.c b/qemu-clock.c
> index 300e38f..b34021c 100644
> --- a/qemu-clock.c
> +++ b/qemu-clock.c
> @@ -27,6 +27,7 @@
>  #include "qemu/log.h"
>  #include "qapi/error.h"
>  #include "hw/qdev-core.h"
> +#include "monitor/monitor.h"
>  
>  #ifndef DEBUG_QEMU_CLOCK
>  #define DEBUG_QEMU_CLOCK 0
> @@ -132,6 +133,33 @@ qemu_clk qemu_clk_device_get_clock(DeviceState *dev, const char *name)
>      return QEMU_CLOCK(clk);
>  }
>  
> +struct print_opaque {
> +    Monitor *mon;
> +    int indent;
> +};
> +
> +static int qemu_clk_print_rec(Object *obj, void *opaque)
> +{
> +    qemu_clk clk = (qemu_clk)(object_dynamic_cast(obj, TYPE_CLOCK));
> +    struct print_opaque *po = opaque;
> +
> +    if (clk) {
> +        monitor_printf(po->mon, "%*s" "qemu-clk \"%s\" %" PRIu64 "\n",
> +                       po->indent, " ", clk->name, clk->out_rate);
> +    }
> +
> +    return 0;
> +}
> +
> +void qemu_clk_print(Monitor *mon, DeviceState *dev, int indent)
> +{
> +    struct print_opaque po;
> +
> +    po.indent = indent;
> +    po.mon = mon;
> +    object_child_foreach(OBJECT(dev), qemu_clk_print_rec, &po);
> +}
> +
>  static const TypeInfo qemu_clk_info = {
>      .name          = TYPE_CLOCK,
>      .parent        = TYPE_OBJECT,
>