Re: [PATCH v2 01/10] iommu/vt-d: Introduce native SVM capable flag

[Jacob Pan]

On Mon, 18 Nov 2019 21:33:53 +0100
Auger Eric <eric.auger@xxxxxxxxxx> wrote:

> Hi Jacob,
> 
> On 11/18/19 8:42 PM, Jacob Pan wrote:
> > Shared Virtual Memory(SVM) is based on a collective set of hardware
> > features detected at runtime. There are requirements for matching
> > CPU and IOMMU capabilities.
> > 
> > This patch introduces a flag which will be used to mark and test the
> > capability of SVM.
> > 
> > Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
> > Acked-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> > ---
> >  include/linux/intel-iommu.h | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/include/linux/intel-iommu.h
> > b/include/linux/intel-iommu.h index ed11ef594378..63118991824c
> > 100644 --- a/include/linux/intel-iommu.h
> > +++ b/include/linux/intel-iommu.h
> > @@ -433,6 +433,7 @@ enum {
> >  
> >  #define VTD_FLAG_TRANS_PRE_ENABLED	(1 << 0)
> >  #define VTD_FLAG_IRQ_REMAP_PRE_ENABLED	(1 << 1)
> > +#define VTD_FLAG_SVM_CAPABLE		(1 << 2)  
> 
> I think I would rather squash this into the next patch as there is no
> user here.
> 
Sure, I don't have strong preference. Baolu, what is your call?

> Thanks
> 
> Eric
> >  
> >  extern int intel_iommu_sm;
> >  
> >   
> 

[Jacob Pan]