drm/amdgpu: add debug flag to enable RAS ACA

Use debug_mask=0x10 (BIT.4) param to help enable RAS ACA.
(RAS ACA is disabled by default.)
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1166,6 +1166,7 @@ struct amdgpu_device {
 	bool                            debug_largebar;
 	bool                            debug_disable_soft_recovery;
 	bool                            debug_use_vram_fw_buf;
+	bool                            debug_enable_ras_aca;
 };
 
 static inline uint32_t amdgpu_ip_version(const struct amdgpu_device *adev,

drivers/gpu/drm/amd/amdgpu/amdgpu_aca.c

@@ -686,7 +686,8 @@ static void aca_manager_fini(struct aca_handle_manager *mgr)
 
 bool amdgpu_aca_is_enabled(struct amdgpu_device *adev)
 {
-	return adev->aca.is_enabled;
+	return (adev->aca.is_enabled ||
+		adev->debug_enable_ras_aca);
 }
 
 int amdgpu_aca_init(struct amdgpu_device *adev)

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -129,6 +129,7 @@ enum AMDGPU_DEBUG_MASK {
 	AMDGPU_DEBUG_LARGEBAR = BIT(1),
 	AMDGPU_DEBUG_DISABLE_GPU_SOFT_RECOVERY = BIT(2),
 	AMDGPU_DEBUG_USE_VRAM_FW_BUF = BIT(3),
+	AMDGPU_DEBUG_ENABLE_RAS_ACA = BIT(4),
 };
 
 unsigned int amdgpu_vram_limit = UINT_MAX;
@@ -2192,6 +2193,11 @@ static void amdgpu_init_debug_options(struct amdgpu_device *adev)
 		pr_info("debug: place fw in vram for frontdoor loading\n");
 		adev->debug_use_vram_fw_buf = true;
 	}
+
+	if (amdgpu_debug_mask & AMDGPU_DEBUG_ENABLE_RAS_ACA) {
+		pr_info("debug: enable RAS ACA\n");
+		adev->debug_enable_ras_aca = true;
+	}
 }
 
 static unsigned long amdgpu_fix_asic_type(struct pci_dev *pdev, unsigned long flags)