Re: [PATCH] iommu: Add device name to iommu map/unmap trace events

[chenxiang (M)]

Hi,


在 2021/2/12 18:50, Joerg Roedel 写道:
> On Tue, Feb 09, 2021 at 06:06:20PM +0530, Sai Prakash Ranjan wrote:
> > diff --git a/include/linux/iommu.h b/include/linux/iommu.h
> > index 5e7fe519430a..6064187d9bb6 100644
> > --- a/include/linux/iommu.h
> > +++ b/include/linux/iommu.h
> > @@ -87,6 +87,7 @@ struct iommu_domain {
> >   	void *handler_token;
> >   	struct iommu_domain_geometry geometry;
> >   	void *iova_cookie;
> > +	char dev_name[32];
> >   };
> No, definitly not. A domain is a device DMA address space which can be
> used by more than one device. Just look at IOMMU groups with more than
> one member device, in this case just one device name would be very
> misleading.

Is it possible to use group id to identify different domains?


> Regards,
>
> 	Joerg
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> .