1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 64a42647f08a..bd13ca09eb62 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1018,6 +1018,10 @@ int radeon_device_init(struct radeon_device *rdev,
                 return r;
         /* initialize vm here */
         mutex_init(&rdev->vm_manager.lock);
+        /* Adjust VM size here.
+         * Currently set to 4GB ((1 << 20) 4k pages).
+         * Max GPUVM size for cayman and SI is 40 bits.
+         */
         rdev->vm_manager.max_pfn = 1 << 20;
         INIT_LIST_HEAD(&rdev->vm_manager.lru_vm);