This is a note to let you know that I've just added the patch titled
drm/amdgpu: Update NV SIMD-per-CU to 2
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-update-nv-simd-per-cu-to-2.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From aa6158112645aae514982ad8d56df64428fcf203 Mon Sep 17 00:00:00 2001
From: Joseph Greathouse <Joseph.Greathouse@xxxxxxx>
Date: Tue, 29 Jun 2021 21:08:52 -0500
Subject: drm/amdgpu: Update NV SIMD-per-CU to 2
From: Joseph Greathouse <Joseph.Greathouse@xxxxxxx>
commit aa6158112645aae514982ad8d56df64428fcf203 upstream.
Navi series GPUs have 2 SIMDs per CU (and then 2 CUs per WGP).
The NV enum headers incorrectly listed this as 4, which later meant
we were incorrectly reporting the number of SIMDs in the HSA
topology. This could cause problems down the line for user-space
applications that want to launch a fixed amount of work to each
SIMD.
Signed-off-by: Joseph Greathouse <Joseph.Greathouse@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/include/navi10_enum.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/include/navi10_enum.h
+++ b/drivers/gpu/drm/amd/include/navi10_enum.h
@@ -430,7 +430,7 @@ ARRAY_2D_DEPTH
*/
typedef enum ENUM_NUM_SIMD_PER_CU {
-NUM_SIMD_PER_CU = 0x00000004,
+NUM_SIMD_PER_CU = 0x00000002,
} ENUM_NUM_SIMD_PER_CU;
/*
Patches currently in stable-queue which might be from Joseph.Greathouse@xxxxxxx are
queue-5.4/drm-amdgpu-update-nv-simd-per-cu-to-2.patch
