Re: [Qemu-devel] [PATCH v4 5/5] Add param Error ** for msi_init()

[Cao jin]

On 04/11/2016 06:00 PM, Marcel Apfelbaum wrote:
> > 2). If user doesn`t order msi on(so device have msi on by default),
> > when msi_init returns -ENOTSUP, I am ok with Markus`s suggestion:
> > *caller should silently switch to the non-MSI variant*
> >
> > But now the condition is, qemu can`t distinguish whether user ordered
> > msi or not, so for the condition 2) above, my suggestion is the same
> > as 1)
>
> If we can't distinguish between the cases, 2 would not be user-friendly.
> Once it would be possible to differentiate we could go for 2.

Hi,

How to differentiate? Do you mean: let these msi(msix) property default 
to 'off'? It seem most device have it on, a few have it off.

> Thanks,
> Marcel

--
Yours Sincerely,

Cao jin