Re: [Qemu-devel] [PATCH v2] vmxnet3: Fix reading/writing guest memory specially when behind an IOMMU

[Jason Wang]

On 2016年06月21日 14:21, Dmitry Fleytman wrote:
> > On 20 Jun 2016, at 16:50 PM, KarimAllah Ahmed <address@hidden 
> > <mailto:address@hidden>> wrote:
> >
> > When a PCI device lives behind an IOMMU, it should use 'pci_dma_*' 
> > family of
> > functions when any transfer from/to guest memory is required while
> > 'cpu_physical_memory_*' family of functions completely bypass any 
> > MMU/IOMMU in
> > the system.
> >
> > vmxnet3 in some places was using 'cpu_physical_memory_*' family of 
> > functions
> > which works fine with the default QEMU setup where IOMMU is not 
> > enabled but
> > fails miserably when IOMMU is enabled. This commit converts all such 
> > instances
> > in favor of 'pci_dma_*’
>
> Acked-by: Dmitry Fleytman <address@hidden <mailto:address@hidden>>

Applied to -net. Thanks

> > Cc: Dmitry Fleytman <address@hidden <mailto:address@hidden>>
> > Cc: Jason Wang <address@hidden <mailto:address@hidden>>
> > Cc: address@hidden <mailto:address@hidden>
> > Cc: Anthony Liguori <address@hidden <mailto:address@hidden>>
> > Signed-off-by: KarimAllah Ahmed <address@hidden 
> > <mailto:address@hidden>>
> >
> > —
>
> ...