[edk2-devel] VirtIO Sound Driver (GSoC 2021)

[Ethin Probst]

Oh, okay, thank you.

On 4/15/21, Michael Brown <mcb30 at ipxe.org> wrote:
> On 16/04/2021 01:59, Ethin Probst wrote:
>> Also, I'm a bit confused. I've looked at several VirtIO devices now
>> and have seen things like this:
>> #define VIRTIO_PCI_DEVICE_SIGNATURE   SIGNATURE_32 ('V', 'P', 'C', 'I')
>> // ...
>>    UINT32                 Signature;
>> I'm quite confused because I can't seem to find this anywhere in the
>> VirtIO specification. The spec says nothing about signature values
>> anywhere, just the magic value of 0x74726976. So where does this come
>> from?
>
>  From a quick look at the code, it seems to be a private signature value
> applied to a software-only data structure used by the UEFI driver, and
> is used solely for sanity checking that a pointer is pointing to the
> right kind of object.
>
> Michael
>


-- 
Signed,
Ethin D. Probst


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