From b9c5eb5b801a76df47e12a5754dcc1d3c4b34625 Mon Sep 17 00:00:00 2001 From: Philip Yang Date: Mon, 4 Mar 2019 10:37:55 -0500 Subject: drm/amdgpu: more descriptive message if HMM not enabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If using old kernel config file, CONFIG_ZONE_DEVICE is not selected, so CONFIG_HMM and CONFIG_HMM_MIRROR is not enabled, the current driver error message "Failed to register MMU notifier" is not clear. Inform user with more descriptive message on how to fix the missing kernel config option. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109808 Signed-off-by: Philip Yang Reviewed-by: Michel Dänzer Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h index 4803e216e174..f5b67c63ed6b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mn.h @@ -53,6 +53,8 @@ static inline struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev, } static inline int amdgpu_mn_register(struct amdgpu_bo *bo, unsigned long addr) { + DRM_WARN_ONCE("HMM_MIRROR kernel config option is not enabled, " + "add CONFIG_ZONE_DEVICE=y in config file to fix this\n"); return -ENODEV; } static inline void amdgpu_mn_unregister(struct amdgpu_bo *bo) {} -- cgit