Re: [PATCH-for-9.1?] hw/pci/pci-hmp-cmds: Avoid displaying bogus size in 'info pci'

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Aug 01, 2024 at 12:07:42PM +0200, Philippe Mathieu-Daudé wrote:
> When BAR aren't configured, we get:
> 
>   (qemu) info pci
>     Bus  0, device   0, function 0:
>       Host bridge: PCI device dead:beef
>         ...
>         BAR4: 32 bit memory at 0xffffffffffffffff [0x00000ffe].
>         BAR5: I/O at 0xffffffffffffffff [0x0ffe].
> 
> Improve logging to not display bogus sizes:
> 
>       BAR4: 32 bit memory (not configured)
>       BAR5: I/O (not configured)
> 
> Remove trailing dot which is not used in other commands format.
> 
> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> ---
>  hw/pci/pci-hmp-cmds.c | 26 ++++++++++++++++++--------
>  1 file changed, 18 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/pci/pci-hmp-cmds.c b/hw/pci/pci-hmp-cmds.c
> index b09fce9377..8421c3f74a 100644
> --- a/hw/pci/pci-hmp-cmds.c
> +++ b/hw/pci/pci-hmp-cmds.c
> @@ -83,15 +83,25 @@ static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)
>          monitor_printf(mon, "      BAR%" PRId64 ": ", region->value->bar);
>  
>          if (!strcmp(region->value->type, "io")) {
> -            monitor_printf(mon, "I/O at 0x%04" PRIx64
> -                                " [0x%04" PRIx64 "].\n",
> -                           addr, addr + size - 1);
> +            if (addr != UINT64_MAX) {
> +                monitor_printf(mon, "I/O at 0x%04" PRIx64
> +                                    " [0x%04" PRIx64 "]\n",
> +                               addr, addr + size - 1);
> +            } else {
> +                monitor_printf(mon, "I/O (not configured)\n");
> +            }
>          } else {
> -            monitor_printf(mon, "%d bit%s memory at 0x%08" PRIx64
> -                               " [0x%08" PRIx64 "].\n",
> -                           region->value->mem_type_64 ? 64 : 32,
> -                           region->value->prefetch ? " prefetchable" : "",
> -                           addr, addr + size - 1);
> +            if (addr != UINT64_MAX) {
> +                monitor_printf(mon, "%d bit%s memory at 0x%08" PRIx64
> +                                   " [0x%08" PRIx64 "]\n",
> +                               region->value->mem_type_64 ? 64 : 32,
> +                               region->value->prefetch ? " prefetchable" : "",
> +                               addr, addr + size - 1);
> +            } else {
> +                monitor_printf(mon, "%d bit%s memory (not configured)\n",
> +                               region->value->mem_type_64 ? 64 : 32,
> +                               region->value->prefetch ? " prefetchable" : "");
> +            }
>          }
>      }

what makes bar unconfigured is that memory space is disabled,
not that it has a special value.


>  
> -- 
> 2.45.2