[PATCH] drm/amdgpu: enable TMZ by default on Raven asics

[Alex Deucher]

This has been stable for a while.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  4 ++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 2f71d36d2856..21504ea9085f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -164,7 +164,7 @@ int amdgpu_discovery = -1;
 int amdgpu_mes;
 int amdgpu_noretry = -1;
 int amdgpu_force_asic_type = -1;
-int amdgpu_tmz;
+int amdgpu_tmz = -1; /* auto */
 int amdgpu_reset_method = -1; /* auto */
 int amdgpu_num_kcq = -1;
 
@@ -790,7 +790,7 @@ module_param_named(abmlevel, amdgpu_dm_abm_level, uint, 0444);
  *
  * The default value: 0 (off).  TODO: change to auto till it is completed.
  */
-MODULE_PARM_DESC(tmz, "Enable TMZ feature (-1 = auto, 0 = off (default), 1 = on)");
+MODULE_PARM_DESC(tmz, "Enable TMZ feature (-1 = auto (default), 0 = off, 1 = on)");
 module_param_named(tmz, amdgpu_tmz, int, 0444);
 
 /**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index fe1a39ffda72..1a892526d020 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -384,6 +384,16 @@ void amdgpu_gmc_tmz_set(struct amdgpu_device *adev)
 {
 	switch (adev->asic_type) {
 	case CHIP_RAVEN:
+		if (amdgpu_tmz == 0) {
+			adev->gmc.tmz_enabled = false;
+			dev_info(adev->dev,
+				 "Trusted Memory Zone (TMZ) feature disabled (cmd line)\n");
+		} else {
+			adev->gmc.tmz_enabled = true;
+			dev_info(adev->dev,
+				 "Trusted Memory Zone (TMZ) feature enabled\n");
+		}
+		break;
 	case CHIP_RENOIR:
 	case CHIP_NAVI10:
 	case CHIP_NAVI14:
-- 
2.29.2