linux-kernel - [PATCH 1/1] drm/amdkfd: Fix unaligned doorbell absolute offset for gfx8

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

Message-ID: <20230927161616.3335-2-Arvind.Yadav@amd.com>
Date:   Wed, 27 Sep 2023 21:46:16 +0530
From:   Arvind Yadav <Arvind.Yadav@....com>
To:     <Christian.Koenig@....com>, <alexander.deucher@....com>,
        <shashank.sharma@....com>, <Felix.Kuehling@....co>,
        <Xinhui.Pan@....com>, <airlied@...il.com>, <daniel@...ll.ch>
CC:     <amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>,
        Arvind Yadav <Arvind.Yadav@....com>,
        Christian Koenig <christian.koenig@....com>
Subject: [PATCH 1/1] drm/amdkfd: Fix unaligned doorbell absolute offset for gfx8

This patch is to adjust the absolute doorbell offset
against the doorbell id considering the doorbell
size of 32/64 bit.

Cc: Christian Koenig <christian.koenig@....com>
Cc: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Shashank Sharma <shashank.sharma@....com>
Signed-off-by: Arvind Yadav <Arvind.Yadav@....com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 0d3d538b64eb..c327f7f604d7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -407,7 +407,16 @@ static int allocate_doorbell(struct qcm_process_device *qpd,
 
 	q->properties.doorbell_off = amdgpu_doorbell_index_on_bar(dev->adev,
 								  qpd->proc_doorbells,
-								  q->doorbell_id);
+								  0);
+
+	/* Adjust the absolute doorbell offset against the doorbell id considering
+	 * the doorbell size of 32/64 bit.
+	 */
+	if (!KFD_IS_SOC15(dev))
+		q->properties.doorbell_off += q->doorbell_id;
+	else
+		q->properties.doorbell_off += q->doorbell_id * 2;
+
 	return 0;
 }
 
-- 
2.34.1