Commit 64e1f830 authored by Christian König's avatar Christian König
Browse files

drm: fallback to dma_alloc_coherent when memory encryption is active 



We can't just map any randome page we get when memory encryption is
active.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Acked-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.kernel.org/patch/10850833/
parent 088aed8b

drivers/gpu/drm/drm_memory.c

+7 −0
Original line number Diff line number Diff line
@@ -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);

	}

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