linux-kernel - [PATCH] drm/ttm: Print the memory decryption status just once

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Date: Mon,  8 Apr 2024 11:56:05 -0400
From: Zack Rusin <zack.rusin@...adcom.com>
To: dri-devel@...ts.freedesktop.org
Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	ian.forbes@...adcom.com,
	martin.krastev@...adcom.com,
	maaz.mombasawala@...adcom.com,
	Zack Rusin <zack.rusin@...adcom.com>,
	Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
	Christian König <christian.koenig@....com>,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH] drm/ttm: Print the memory decryption status just once

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 <zack.rusin@...adcom.com>
Fixes: 71ce046327cf ("drm/ttm: Make sure the mapped tt pages are decrypted when needed")
Cc: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
Cc: Christian König <christian.koenig@....com>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
Cc: <stable@...r.kernel.org> # v5.14+
---
 drivers/gpu/drm/ttm/ttm_tt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 578a7c37f00b..d776e3f87064 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -92,7 +92,7 @@ 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);
-- 
2.40.1