From 3bbb17e4da8408b6ded00eb32660667399970e48 Mon Sep 17 00:00:00 2001
From: Hawking Zhang <Hawking.Zhang@amd.com>
Date: Mon, 22 Nov 2021 21:19:06 +0800
Subject: drm/amdgpu: add helper to verify ip discovery binary signature
Git-commit: 32f0e1a3307f1372824dcf28b90fdab5aa11b54f
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

To be used to check ip discovery binary signature

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index e9e88bb4d261..05ffbf5ddd49 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -235,6 +235,14 @@ static inline bool amdgpu_discovery_verify_checksum(uint8_t *data, uint32_t size
 	return !!(amdgpu_discovery_calculate_checksum(data, size) == expected);
 }
 
+static inline bool amdgpu_discovery_verify_binary_signature(uint8_t *binary)
+{
+	struct binary_header *bhdr;
+	bhdr = (struct binary_header *)binary;
+
+	return (le32_to_cpu(bhdr->binary_signature) == BINARY_SIGNATURE);
+}
+
 static int amdgpu_discovery_init(struct amdgpu_device *adev)
 {
 	struct table_info *info;
-- 
2.38.1