Re: [Qemu-devel] [RFC PATCH 1/5] vfio/quirks: Add common quirk alloc helper

[Auger Eric]

Hi Alex,
On 07/02/18 01:26, Alex Williamson wrote:
> This will later be used to include list initialization
> 
> Signed-off-by: Alex Williamson <address@hidden>
> ---
>  hw/vfio/pci-quirks.c |   48 +++++++++++++++++++++---------------------------
>  1 file changed, 21 insertions(+), 27 deletions(-)
> 
> diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
> index e5779a7ad35b..10af23217292 100644
> --- a/hw/vfio/pci-quirks.c
> +++ b/hw/vfio/pci-quirks.c
> @@ -275,6 +275,15 @@ static const MemoryRegionOps vfio_ati_3c3_quirk = {
>      .endianness = DEVICE_LITTLE_ENDIAN,
>  };
>  
> +static VFIOQuirk *vfio_quirk_alloc(int nr_mem)
> +{
> +    VFIOQuirk *quirk = g_malloc0(sizeof(*quirk));
nit: Peter advised the usage of g_new0 as well for that kind of alloc.
> +    quirk->mem = g_new0(MemoryRegion, nr_mem);
> +    quirk->nr_mem = nr_mem;
> +
> +    return quirk;
> +}
> +
>  static void vfio_vga_probe_ati_3c3_quirk(VFIOPCIDevice *vdev)
>  {
>      VFIOQuirk *quirk;
> @@ -288,9 +297,7 @@ static void vfio_vga_probe_ati_3c3_quirk(VFIOPCIDevice 
> *vdev)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> -    quirk->mem = g_new0(MemoryRegion, 1);
> -    quirk->nr_mem = 1;
> +    quirk = vfio_quirk_alloc(1);
>  
>      memory_region_init_io(quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, 
> vdev,
>                            "vfio-ati-3c3-quirk", 1);
> @@ -323,9 +330,7 @@ static void vfio_probe_ati_bar4_quirk(VFIOPCIDevice 
> *vdev, int nr)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> -    quirk->mem = g_new0(MemoryRegion, 2);
> -    quirk->nr_mem = 2;
> +    quirk = vfio_quirk_alloc(2);
>      window = quirk->data = g_malloc0(sizeof(*window) +
>                                       sizeof(VFIOConfigWindowMatch));
>      window->vdev = vdev;
> @@ -371,10 +376,9 @@ static void vfio_probe_ati_bar2_quirk(VFIOPCIDevice 
> *vdev, int nr)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> +    quirk = vfio_quirk_alloc(1);
>      mirror = quirk->data = g_malloc0(sizeof(*mirror));
> -    mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
> -    quirk->nr_mem = 1;
> +    mirror->mem = quirk->mem;
>      mirror->vdev = vdev;
>      mirror->offset = 0x4000;
>      mirror->bar = nr;
> @@ -548,10 +552,8 @@ static void 
> vfio_vga_probe_nvidia_3d0_quirk(VFIOPCIDevice *vdev)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> +    quirk = vfio_quirk_alloc(2);
>      quirk->data = data = g_malloc0(sizeof(*data));
> -    quirk->mem = g_new0(MemoryRegion, 2);
> -    quirk->nr_mem = 2;
>      data->vdev = vdev;
>  
>      memory_region_init_io(&quirk->mem[0], OBJECT(vdev), 
> &vfio_nvidia_3d4_quirk,
> @@ -667,9 +669,7 @@ static void vfio_probe_nvidia_bar5_quirk(VFIOPCIDevice 
> *vdev, int nr)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> -    quirk->mem = g_new0(MemoryRegion, 4);
> -    quirk->nr_mem = 4;
> +    quirk = vfio_quirk_alloc(4);
>      bar5 = quirk->data = g_malloc0(sizeof(*bar5) +
>                                     (sizeof(VFIOConfigWindowMatch) * 2));
>      window = &bar5->window;
> @@ -762,10 +762,9 @@ static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice 
> *vdev, int nr)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> +    quirk = vfio_quirk_alloc(1);
>      mirror = quirk->data = g_malloc0(sizeof(*mirror));
> -    mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
> -    quirk->nr_mem = 1;
> +    mirror->mem = quirk->mem;
>      mirror->vdev = vdev;
>      mirror->offset = 0x88000;
>      mirror->bar = nr;
> @@ -781,10 +780,9 @@ static void vfio_probe_nvidia_bar0_quirk(VFIOPCIDevice 
> *vdev, int nr)
>  
>      /* The 0x1800 offset mirror only seems to get used by legacy VGA */
>      if (vdev->vga) {
> -        quirk = g_malloc0(sizeof(*quirk));
> +        quirk = vfio_quirk_alloc(1);
>          mirror = quirk->data = g_malloc0(sizeof(*mirror));
> -        mirror->mem = quirk->mem = g_new0(MemoryRegion, 1);
> -        quirk->nr_mem = 1;
> +        mirror->mem = quirk->mem;
>          mirror->vdev = vdev;
>          mirror->offset = 0x1800;
>          mirror->bar = nr;
> @@ -945,9 +943,7 @@ static void vfio_probe_rtl8168_bar2_quirk(VFIOPCIDevice 
> *vdev, int nr)
>          return;
>      }
>  
> -    quirk = g_malloc0(sizeof(*quirk));
> -    quirk->mem = g_new0(MemoryRegion, 2);
> -    quirk->nr_mem = 2;
> +    quirk = vfio_quirk_alloc(2);
>      quirk->data = rtl = g_malloc0(sizeof(*rtl));
>      rtl->vdev = vdev;
>  
> @@ -1507,9 +1503,7 @@ static void vfio_probe_igd_bar4_quirk(VFIOPCIDevice 
> *vdev, int nr)
>      }
>  
>      /* Setup our quirk to munge GTT addresses to the VM allocated buffer */
> -    quirk = g_malloc0(sizeof(*quirk));
> -    quirk->mem = g_new0(MemoryRegion, 2);
> -    quirk->nr_mem = 2;
> +    quirk = vfio_quirk_alloc(2);
>      igd = quirk->data = g_malloc0(sizeof(*igd));
>      igd->vdev = vdev;
>      igd->index = ~0;
> 
Reviewed-by: Eric Auger <address@hidden>

Thanks

Eric