Add a modparam for turning off Big/Super Pages to make sure that if an
user doesn't want Big/Super Pages enabled, it can disabled it by setting
the modparam to false.
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>
---
drivers/gpu/drm/v3d/v3d_drv.c | 7 +++++++
drivers/gpu/drm/v3d/v3d_drv.h | 1 +
drivers/gpu/drm/v3d/v3d_gemfs.c | 4 ++++
3 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index d7ff1f5fa481..8be8c6dd9b35 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -36,6 +36,13 @@
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0
+/* Only expose the `super_pages` modparam if THP is enabled. */
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+bool super_pages = true;
+module_param_named(super_pages, super_pages, bool, 0400);
+MODULE_PARM_DESC(super_pages, "Enable/Disable Super Pages support.");
+#endif
+
static int v3d_get_param_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index a98543290fa8..de73eefff9ac 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -539,6 +539,7 @@ void v3d_invalidate_caches(struct v3d_dev *v3d);
void v3d_clean_caches(struct v3d_dev *v3d);
/* v3d_gemfs.c */
+extern bool super_pages;
void v3d_gemfs_init(struct v3d_dev *v3d);
void v3d_gemfs_fini(struct v3d_dev *v3d);
diff --git a/drivers/gpu/drm/v3d/v3d_gemfs.c b/drivers/gpu/drm/v3d/v3d_gemfs.c
index 31cf5bd11e39..4c5e18590a5c 100644
--- a/drivers/gpu/drm/v3d/v3d_gemfs.c
+++ b/drivers/gpu/drm/v3d/v3d_gemfs.c
@@ -20,6 +20,10 @@ void v3d_gemfs_init(struct v3d_dev *v3d)
if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
goto err;
+ /* The user doesn't want to enable Super Pages */
+ if (!super_pages)
+ goto err;
+
type = get_fs_type("tmpfs");
if (!type)
goto err;
--
2.46.0
