.snip..
> > -u64 drm_get_max_iomem(void)
> > +bool drm_need_swiotlb(int dma_bits)
> > {
> > struct resource *tmp;
> > resource_size_t max_iomem = 0;
> >
> > + /*
> > +* Xen paravirtual hosts require swiotlb regardless of requested dma
> > +* transfer size.
> > +*
> > +*
uergen Gross ; Christoph Hellwig
> ; Andrew Cooper ; Paul
> Durrant ; xen-de...@lists.xen.org; Jan Beulich
> ; Konrad Rzeszutek Wilk ;
> Michael D Labriola
> Subject: [PATCH] drm: add func to better detect wether swiotlb is needed
>
> This commit fixes DRM failures on X
This commit fixes DRM failures on Xen PV systems that were introduced in
v4.17 by the following commits:
82626363 drm: add func to get max iomem address v2
fd5fd480 drm/amdgpu: only enable swiotlb alloc when need v2
1bc3d3cc drm/radeon: only enable swiotlb path when need v2
The introduction of
