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From 75cf0d7a899f1dfdd25b245476ea124c1db17fca Mon Sep 17 00:00:00 2001
From: Alex Sierra <alex.sierra@amd.com>
Date: Thu, 24 Oct 2019 13:14:31 -0500
Subject: [PATCH 4306/4736] drm/amdkfd: bug fix for out of bounds mem on gpu
cache filling info
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.
Change-Id: I20fadd0a12403a8808cf074c0d7160daad6834ee
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
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 7655c6a2b184..22fe58971a62 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);
--
2.17.1
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