drm/ttm: Print the memory decryption status just once

commit 27906e5d78248b19bcdfdae72049338c828897bb upstream.

Stop printing the TT memory decryption status info each time tt is created
and instead print it just once.

Reduces the spam in the system logs when running guests with SEV enabled.

Signed-off-by: Zack Rusin <[email protected]>
Fixes: 71ce046327cf ("drm/ttm: Make sure the mapped tt pages are decrypted when needed")
Reviewed-by: Christian König <[email protected]>
Cc: Thomas Hellström <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: <[email protected]> # v5.14+
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Ye Li <[email protected]>
Signed-off-by: Ajay Kaher <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: zackr

drivers/gpu/drm/ttm/ttm_tt.c

@@ -90,7 +90,7 @@ int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc)
 	 */
 	if (bdev->pool.use_dma_alloc && cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) {
 		page_flags |= TTM_TT_FLAG_DECRYPTED;
-		drm_info(ddev, "TT memory decryption enabled.");
+		drm_info_once(ddev, "TT memory decryption enabled.");
 	}
 
 	bo->ttm = bdev->funcs->ttm_tt_create(bo, page_flags);