[PATCH Review 1/1] drm/amdgpu: handle denied inject error into critical regions

[Stanley.Yang]

Signed-off-by: Stanley.Yang <Stanley.Yang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 10 +++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c |  2 +-
 drivers/gpu/drm/amd/amdgpu/ta_ras_if.h  |  3 ++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index c742d1aacf5a..8e0ea582b9c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -1309,6 +1309,12 @@ static void psp_ras_ta_check_status(struct psp_context *psp)
 		break;
 	case TA_RAS_STATUS__SUCCESS:
 		break;
+	case TA_RAS_STATUS__TEE_ERROR_ACCESS_DENIED:
+		if (ras_cmd->cmd_id == TA_RAS_COMMAND__TRIGGER_ERROR) {
+			dev_info(psp->adev->dev,
+					"RAS INFO: Inject error to critical region is not allowed\n");
+		}
+		break;
 	default:
 		dev_warn(psp->adev->dev,
 				"RAS WARNING: ras status = 0x%X\n", ras_cmd->ras_status);
@@ -1521,7 +1527,9 @@ int psp_ras_trigger_error(struct psp_context *psp,
 	if (amdgpu_ras_intr_triggered())
 		return 0;
 
-	if (ras_cmd->ras_status)
+	if (ras_cmd->ras_status == TA_RAS_STATUS__TEE_ERROR_ACCESS_DENIED)
+		return -EACCES;
+	else if (ras_cmd->ras_status)
 		return -EINVAL;
 
 	return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index e674dbed3615..8bdc2e85cb20 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -449,7 +449,7 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f,
 	}
 
 	if (ret)
-		return -EINVAL;
+		return ret;
 
 	return size;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/ta_ras_if.h b/drivers/gpu/drm/amd/amdgpu/ta_ras_if.h
index 5093826a43d1..509d8a1945eb 100644
--- a/drivers/gpu/drm/amd/amdgpu/ta_ras_if.h
+++ b/drivers/gpu/drm/amd/amdgpu/ta_ras_if.h
@@ -64,7 +64,8 @@ enum ta_ras_status {
 	TA_RAS_STATUS__ERROR_PCS_STATE_ERROR            = 0xA016,
 	TA_RAS_STATUS__ERROR_PCS_STATE_HANG             = 0xA017,
 	TA_RAS_STATUS__ERROR_PCS_STATE_UNKNOWN          = 0xA018,
-	TA_RAS_STATUS__ERROR_UNSUPPORTED_ERROR_INJ      = 0xA019
+	TA_RAS_STATUS__ERROR_UNSUPPORTED_ERROR_INJ      = 0xA019,
+	TA_RAS_STATUS__TEE_ERROR_ACCESS_DENIED          = 0xA01A
 };
 
 enum ta_ras_block {
-- 
2.17.1