Add log to display whether RAM is direct vs DMA mapped. Signed-off-by: Graham Sider <graham.si...@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 3bd6c5aef796..83774824694b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -3528,8 +3528,12 @@ static void amdgpu_device_check_iommu_direct_map(struct amdgpu_device *adev) struct iommu_domain *domain; domain = iommu_get_domain_for_dev(adev->dev); - if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY) + if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY) { + dev_info(adev->dev, "RAM is direct mapped to GPU (not translated by IOMMU)\n"); adev->ram_is_direct_mapped = true; + } else { + dev_info(adev->dev, "RAM is DMA mapped to GPU (translated by IOMMU)\n"); + } } static const struct attribute *amdgpu_dev_attributes[] = { -- 2.25.1