On 07/27/17 at 05:38pm, Joerg Roedel wrote:
> On Fri, Jul 21, 2017 at 04:59:04PM +0800, Baoquan He wrote:
> > @@ -2128,9 +2131,43 @@ static void early_enable_iommu(struct amd_iommu
> > *iommu)
> > static void early_enable_iommus(void)
> > {
> > struct amd_iommu *iommu;
> > + bool is_pre_enabled = false;
> >
> > - for_each_iommu(iommu)
> > - early_enable_iommu(iommu);
> > + for_each_iommu(iommu) {
> > + if (translation_pre_enabled(iommu)) {
> > + is_pre_enabled = true;
> > + break;
> > + }
> > + }
>
> is_pre_enabled should only be true when _all_ iommus are pre-enabled. If
> only one is found disabled just disable the others and continue without
> copying the device table.
OK, will change as you suggested.
>
