From ef6691565391d0ce4c995dd9ca58329cce1a78b8 Mon Sep 17 00:00:00 2001
From: Alex Sierra <alex.sierra@amd.com>
Date: Thu, 24 Oct 2019 13:14:31 -0500
Subject: drm/amdkfd: bug fix for out of bounds mem on gpu cache filling info
Git-commit: ef6691565391d0ce4c995dd9ca58329cce1a78b8
Patch-mainline: v5.5-rc1
References: bsc#1152472
The bitmap in cu_info structure is defined as a 4x4 size array. In
Acturus, this matrix is initialized as a 4x2. Based on the 8 shaders.
In the gpu cache filling initialization, the access to the bitmap matrix
was done as an 8x1 instead of 4x2. Causing an out of bounds memory
access error.
Due to this, the number of GPU cache entries was inconsistent.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/amd/amdkfd/kfd_crat.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
index 0c327e0fc0f7..de9f68d5c312 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_crat.c
@@ -710,7 +710,7 @@ static int kfd_fill_gpu_cache_info(struct kfd_dev *kdev,
pcache_info,
cu_info,
mem_available,
- cu_info->cu_bitmap[i][j],
+ cu_info->cu_bitmap[i % 4][j + i / 4],
ct,
cu_processor_id,
k);
--
2.28.0