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Re: [Qemu-devel] [PATCH 3/5] qdev/compat: virtio-blk-pci 0.10 compatibi
From: |
Filip Navara |
Subject: |
Re: [Qemu-devel] [PATCH 3/5] qdev/compat: virtio-blk-pci 0.10 compatibility. |
Date: |
Thu, 9 Jul 2009 21:42:47 +0200 |
On Thu, Jul 9, 2009 at 8:20 PM, Michael S. Tsirkin<address@hidden> wrote:
> On Thu, Jul 09, 2009 at 05:09:41PM +0200, Gerd Hoffmann wrote:
>> On 07/09/09 16:52, Michael S. Tsirkin wrote:
>>>> .compat_props = (CompatProperty[]) {
>>>> + {
>>>> + .driver = "virtio-blk-pci",
>>>> + .property = "class",
>>>> + .value = "0x0180", /* PCI_CLASS_STORAGE_OTHER */
>>>
>>> it seems annoying that we can't use the symbolic name. Ideas how to fix
>>> this?
>>
>> We could add a special property type instead of using hex32. Then we
>> can have a string <-> int mapping and use something like
>>
>> .value = "storage-other",
>>
>> Not sure it is worth the trouble though.
>>
>>>> -
>>>> - uint16_t vendor;
>>>> - uint16_t device;
>>>> - uint16_t subvendor;
>>>> - uint16_t class_code;
>>>> - uint8_t pif;
>>>
>>> Are the other fields unused? If yes can be a separate patch ...
>>
>> Yes, they are all unused to date. This patch puts class_code into use.
>>
>>>> + if (proxy->class_code != PCI_CLASS_STORAGE_SCSI&&
>>>> + proxy->class_code != PCI_CLASS_STORAGE_OTHER)
>>>> + proxy->class_code = PCI_CLASS_STORAGE_SCSI;
>>>> +
>>>
>>> what does this do?
>>
>> Make sure proxy->class_code has one of the two allowed values.
>>
>>>> vdev = virtio_blk_init(&pci_dev->qdev);
>>>> virtio_init_pci(proxy, vdev,
>>>> PCI_VENDOR_ID_REDHAT_QUMRANET,
>>>> PCI_DEVICE_ID_VIRTIO_BLOCK,
>>>> - PCI_CLASS_STORAGE_OTHER,
>>>> - 0x00);
>>>> + proxy->class_code, 0x00);
>>>> }
>>>>
>>>> static void virtio_console_init_pci(PCIDevice *pci_dev)
>>>
>>> does this mean that virtio block was broken by some previous
>>> patch? It's not a good way to split changes: bisecting won't work.
>>
>> Huh? virtio block wasn't broken. What makes you think it was?
>>
>> cheers,
>> Gerd
>
> This is adding a parameter to a function. Before this patch it was missing
> this parameter so was broken?
>
It is not! Two parameters removed, two added.
F.
[Qemu-devel] [PATCH 1/5] qdev/compat: compat property infrastructure., Gerd Hoffmann, 2009/07/09
[Qemu-devel] [PATCH 2/5] qdev/compat: add pc-0.10 machine type., Gerd Hoffmann, 2009/07/09
[Qemu-devel] [PATCH 4/5] qdev/compat: virtio-balloon-pci 0.10 compatibility., Gerd Hoffmann, 2009/07/09
[Qemu-devel] [PATCH 5/5] qdev/compat: virtio-net-pci 0.10 compatibility., Gerd Hoffmann, 2009/07/09