Re: [PATCH 0/5] iommu/vt-d: Fix crash dump failure caused by legacy DMA/IO

[Li, ZhenHua]

Sorry I have no plan yet.
Could you send me your logs on your AMD system?

Thanks
Zhenhua
On 12/10/2014 04:46 PM, Baoquan He wrote:
> Hi Joerg, ZhenHua,
>
> This issue happens on AMD iommu too, do you have any plans or
> thoughts on that?
>
> Thanks
> Baoquan
>
> On 11/17/14 at 02:38pm, Joerg Roedel wrote:
> > On Fri, Nov 14, 2014 at 02:27:44PM +0800, Li, ZhenHua wrote:
> > > I am working following  your directions:
> > >
> > > 1.  If the VT-d driver finds the IOMMU enabled, it reuses its root entry
> > > table, and do NOT disable-enable iommu. Other data will be copied.
> > >
> > > 2. When a device driver issues the first dma_map command for a
> > > device, we assign a new and empty page-table, thus removing all
> > > mappings from the old kernel for the device.
> > >
> > > Please let me know if I get something wrong.
> >
> > Yes, this sounds right. Happily waiting for patches :)
> >
> >
> > 	Joerg

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