linux-kernel - [PATCH 6/8] accel/habanalabs: separate nonce from max_size in cpucp

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Message-Id: <20240527121254.1921306-6-obitton@habana.ai>
Date: Mon, 27 May 2024 15:12:52 +0300
From: Ofir Bitton <obitton@...ana.ai>
To: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc: Dani Liberman <dliberman@...ana.ai>
Subject: [PATCH 6/8] accel/habanalabs: separate nonce from max_size in cpucp_packet struct

From: Dani Liberman <dliberman@...ana.ai>

In struct cpucp_packet both nonce and data_max_size members are in an
union overlapping each other. This is a problem as they both are used
in attestation and info_signed packets.
The solution here is to move the nonce member to a different union under
the same structure.

Signed-off-by: Dani Liberman <dliberman@...ana.ai>
Reviewed-by: Ofir Bitton <obitton@...ana.ai>
---
 include/linux/habanalabs/cpucp_if.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/habanalabs/cpucp_if.h b/include/linux/habanalabs/cpucp_if.h
index 1ac1d68193e3..0913415243e8 100644
--- a/include/linux/habanalabs/cpucp_if.h
+++ b/include/linux/habanalabs/cpucp_if.h
@@ -859,9 +859,6 @@ struct cpucp_packet {
 		 * result cannot be used to hold general purpose data.
 		 */
 		__le32 status_mask;
-
-		/* random, used once number, for security packets */
-		__le32 nonce;
 	};
 
 	union {
@@ -870,6 +867,9 @@ struct cpucp_packet {
 
 		/* For Generic packet sub index */
 		__le32 pkt_subidx;
+
+		/* random, used once number, for security packets */
+		__le32 nonce;
 	};
 };
 
-- 
2.34.1