From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 549CD1EABA6; Fri, 4 Oct 2024 18:20:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066043; cv=none; b=stUAdSKEvPkQ6xhFXhRcT9/IPQavuFbx3flrGl42T7CNp1Zpise0sAuo+9sDS1dhEmtZy4uoGLyGu8DXuIrgf45tEo5p6qjzfTY5BuSLHFu04nzQ72UeWrW0oA/hREpACms4/ee235+te/76uKlGpfCfwNJql1DhYHKAGmxywrc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066043; c=relaxed/simple; bh=qCUkdYZFENPx3eZTiw+UAraDYp+IYqhWq1wkRorpgGY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=A6Vzqiv5BIMZfUtRNBfAbr1dmXqgEZp2boM3PykERrElnfW+SdVXDZdCkk7ejmw7oeI9HwyrmMfKXYwSzemGbMr+IJD4x2D3p+4+/UPicLgtuiKNn+Jo6kV3OEH6F58nxRiPKiNmK3hK/rN26JAvfV43SgVToC0k0YppOscuAJ4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RMU3oGa0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RMU3oGa0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A08C9C4CECE; Fri, 4 Oct 2024 18:20:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728066043; bh=qCUkdYZFENPx3eZTiw+UAraDYp+IYqhWq1wkRorpgGY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RMU3oGa0KwsARgkSpaqjVdPLvhDS5EkpPYJaJvoO3xj2LKqPs08rx+TpwSiHD89xC agVCtln4lPqTO5eYKUlBY2Tn5leqZoT2rh+/kcC4kn3e81FVAV28huXL6ovVo0U6Su YKhWIGdI686BvOVbtbB5jr+dGk2E7gQi5edsEtlJG1+R2ekTG6xifTanlZdKjqeOy+ gM/NH1xeCFCrKghkaWekBF4Q6pP2w1RGNYU6D0SsPGhHRqeqKnk7b4tOCwKfuOHpfh ZUhrNZf4sznq7PglcDA3qo5fCSdVFnmseOrcXtBmKmhEWx1q2CHxFwtVVt4/dBRv49 2FhHtni7TAraQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: =?UTF-8?q?Jos=C3=A9=20Roberto=20de=20Souza?= , Ashutosh Dixit , Lucas De Marchi , Sasha Levin , thomas.hellstrom@linux.intel.com, rodrigo.vivi@intel.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.11 71/76] drm/xe/oa: Fix overflow in oa batch buffer Date: Fri, 4 Oct 2024 14:17:28 -0400 Message-ID: <20241004181828.3669209-71-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241004181828.3669209-1-sashal@kernel.org> References: <20241004181828.3669209-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.11.2 Content-Transfer-Encoding: 8bit From: José Roberto de Souza [ Upstream commit 6c10ba06bb1b48acce6d4d9c1e33beb9954f1788 ] By default xe_bb_create_job() appends a MI_BATCH_BUFFER_END to batch buffer, this is not a problem if batch buffer is only used once but oa reuses the batch buffer for the same metric and at each call it appends a MI_BATCH_BUFFER_END, printing the warning below and then overflowing. [ 381.072016] ------------[ cut here ]------------ [ 381.072019] xe 0000:00:02.0: [drm] Assertion `bb->len * 4 + bb_prefetch(q->gt) <= size` failed! platform: LUNARLAKE subplatform: 1 graphics: Xe2_LPG / Xe2_HPG 20.04 step B0 media: Xe2_LPM / Xe2_HPM 20.00 step B0 tile: 0 VRAM 0 B GT: 0 type 1 So here checking if batch buffer already have MI_BATCH_BUFFER_END if not append it. v2: - simply fix, suggestion from Ashutosh Cc: Ashutosh Dixit Signed-off-by: José Roberto de Souza Reviewed-by: Ashutosh Dixit Link: https://patchwork.freedesktop.org/patch/msgid/20240912153842.35813-1-jose.souza@intel.com (cherry picked from commit 9ba0e0f30ca42a98af3689460063edfb6315718a) Signed-off-by: Lucas De Marchi Signed-off-by: Sasha Levin --- drivers/gpu/drm/xe/xe_bb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/xe/xe_bb.c b/drivers/gpu/drm/xe/xe_bb.c index a13e0b3a169ed..ef777dbdf4ecc 100644 --- a/drivers/gpu/drm/xe/xe_bb.c +++ b/drivers/gpu/drm/xe/xe_bb.c @@ -65,7 +65,8 @@ __xe_bb_create_job(struct xe_exec_queue *q, struct xe_bb *bb, u64 *addr) { u32 size = drm_suballoc_size(bb->bo); - bb->cs[bb->len++] = MI_BATCH_BUFFER_END; + if (bb->len == 0 || bb->cs[bb->len - 1] != MI_BATCH_BUFFER_END) + bb->cs[bb->len++] = MI_BATCH_BUFFER_END; xe_gt_assert(q->gt, bb->len * 4 + bb_prefetch(q->gt) <= size); -- 2.43.0