| Message ID | 20190313092052.16347-1-christian.koenig@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm: fallback to dma_alloc_coherent when memory encryption is active | expand |
On Wed, Mar 13, 2019 at 5:21 AM Christian König <ckoenig.leichtzumerken@gmail.com> wrote: > > We can't just map any randome page we get when memory encryption is > active. > > Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> > --- > drivers/gpu/drm/drm_memory.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c > index 8dbcdc77f6bf..132fef8ff1b6 100644 > --- a/drivers/gpu/drm/drm_memory.c > +++ b/drivers/gpu/drm/drm_memory.c > @@ -168,6 +168,13 @@ bool drm_need_swiotlb(int dma_bits) > if (xen_pv_domain()) > return true; > > + /* > + * Enforce dma_alloc_coherent when memory encryption is active as well > + * for the same reasons as for Xen paravirtual hosts. > + */ > + if (mem_encrypt_active()) > + return true; > + > for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) { > max_iomem = max(max_iomem, tmp->end); > } > -- > 2.17.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c index 8dbcdc77f6bf..132fef8ff1b6 100644 --- a/drivers/gpu/drm/drm_memory.c +++ b/drivers/gpu/drm/drm_memory.c @@ -168,6 +168,13 @@ bool drm_need_swiotlb(int dma_bits) if (xen_pv_domain()) return true; + /* + * Enforce dma_alloc_coherent when memory encryption is active as well + * for the same reasons as for Xen paravirtual hosts. + */ + if (mem_encrypt_active()) + return true; + for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) { max_iomem = max(max_iomem, tmp->end); }
We can't just map any randome page we get when memory encryption is active. Signed-off-by: Christian König <christian.koenig@amd.com> --- drivers/gpu/drm/drm_memory.c | 7 +++++++ 1 file changed, 7 insertions(+)