linux-kernel - [PATCH] drm/imagination: Fix ROGUE_MAX_COMPUTE_SHARED

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20260206-rogue-max-compute-shared-registers-v1-1-888249fa50b1@imgtec.com>
Date: Fri, 6 Feb 2026 09:59:49 +0000
From: Matt Coster <matt.coster@...tec.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>
CC: Simon Perretta <simon.perretta@...tec.com>,
        Frank Binns
	<frank.binns@...tec.com>,
        Brajesh Gupta <brajesh.gupta@...tec.com>,
        "Alessio
 Belle" <alessio.belle@...tec.com>,
        Alexandru Dadu
	<alexandru.dadu@...tec.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <stable@...r.kernel.org>, Matt Coster
	<matt.coster@...tec.com>
Subject: [PATCH] drm/imagination: Fix ROGUE_MAX_COMPUTE_SHARED_REGISTERS

Remove a spurious 2x multiplier from this def which can cause instability
in larger compute workloads on hardware with enhancement 38020 present.

Fixes: b41ae495207e ("drm/imagination: Add GPU register headers")
Cc: stable@...r.kernel.org
Suggested-by: Simon Perretta <simon.perretta@...tec.com>
Signed-off-by: Matt Coster <matt.coster@...tec.com>
---
 drivers/gpu/drm/imagination/pvr_rogue_defs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/imagination/pvr_rogue_defs.h b/drivers/gpu/drm/imagination/pvr_rogue_defs.h
index 932b01686008..1fde3be43afe 100644
--- a/drivers/gpu/drm/imagination/pvr_rogue_defs.h
+++ b/drivers/gpu/drm/imagination/pvr_rogue_defs.h
@@ -114,7 +114,7 @@
 	ROGUE_CR_FWCORE_ADDR_REMAP_CONFIG0_CBASE_CLRMSK
 #define FWCORE_ADDR_REMAP_CONFIG0_SIZE_ALIGNSHIFT (12U)
 
-#define ROGUE_MAX_COMPUTE_SHARED_REGISTERS (2 * 1024)
+#define ROGUE_MAX_COMPUTE_SHARED_REGISTERS 1024
 #define ROGUE_MAX_VERTEX_SHARED_REGISTERS 1024
 #define ROGUE_MAX_PIXEL_SHARED_REGISTERS 1024
 #define ROGUE_CSRM_LINE_SIZE_IN_DWORDS (64 * 4 * 4)

---
base-commit: 5023ca80f9589295cb60735016e39fc5cc714243
change-id: 20260130-rogue-max-compute-shared-registers-fffe1e714773