drm/amdgpu: Add kernel parameter support for ignoring bad page threshold

When a GPU hits the bad_page_threshold, it will not be initialized by
the amdgpu driver. This means that the table cannot be cleared, nor can
information gathering be performed (getting serial number, BDF, etc).

If the bad_page_threshold kernel parameter is set to -2,
continue to initialize the GPU, while printing a warning to dmesg that
this action has been done

v2: squash in Luben's fix to restore RAS info reporting

Cc: Luben Tuikov <[email protected]>
Cc: Mukul Joshi <[email protected]>
Signed-off-by: Kent Russell <[email protected]>
Acked-by: Felix Kuehling <[email protected]>
Reviewed-by: Luben Tuikov <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
index 3978152e5ccc..05117eda105b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c
@@ -1105,11 +1105,18 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control,
 			res = amdgpu_ras_eeprom_correct_header_tag(control,
 								   RAS_TABLE_HDR_VAL);
 		} else {
-			*exceed_err_limit = true;
-			dev_err(adev->dev,
-				"RAS records:%d exceed threshold:%d, "
-				"GPU will not be initialized. Replace this GPU or increase the threshold",
+			dev_err(adev->dev, "RAS records:%d exceed threshold:%d",
 				control->ras_num_recs, ras->bad_page_cnt_threshold);
+			if (amdgpu_bad_page_threshold == -2) {
+				dev_warn(adev->dev, "GPU will be initialized due to bad_page_threshold = -2.");
+				res = 0;
+			} else {
+				*exceed_err_limit = true;
+				dev_err(adev->dev,
+					"RAS records:%d exceed threshold:%d, "
+					"GPU will not be initialized. Replace this GPU or increase the threshold",
+					control->ras_num_recs, ras->bad_page_cnt_threshold);
+			}
 		}
 	} else {
 		DRM_INFO("Creating a new EEPROM table");