From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8FFF859B67F for ; Tue, 8 Sep 2026 22:05:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788905113; cv=none; b=PBz1B/SLdg/FDImn9zfZBpWh4f3crrdOSMoWSDXpGk50WdDMjddlwEBFyj8XFi9Al9S/at+w2Ay1eeYzeWWyqiRfoiqVQZPcHfIiQBKuhaIZNKDbRECOLSdLcVg/4LymZ8vWglRUdUR6Tv/ByUsqQIUIf483K5IqUt1UB4sAmEM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788905113; c=relaxed/simple; bh=ViYnDclAaYkDXinYD9Si1bmAVW5kTf756dmZcXP29gE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=JnILaDkeqHoYFQ2vELNMwaaR8CjJW4ZzV7Ms9f6TTiYy1Np8RhPQ/enqQ+bELMeddxx8DyHUzysplVkz3xnFJTfHe5zbDTRSyt8AQBB2VsAFI60PK2Bf5C2LNj9ztr9/rXwNfXyQaAs1hr81tYZ8yZxi1Rlp2UmtbCTUsY9angQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=iGqTIJBT; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="iGqTIJBT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 455B01F00A3A; Tue, 8 Sep 2026 22:05:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788905112; bh=ixbXO59RWk0QWsLMam6PsqGUwplyTBwXbjm2NXGcMBo=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=iGqTIJBTOoO4iFzQOL7qU2RABOnuX3VbAyTBRcQYDac8juIWtJ833Mmvl7Tb8q3M6 rvqk8IN3Zcy71mSb0yCKyPKfz/iART9Un0OmASwxppFVvB8dWltOPKMa9reGiZUNtk s2GWXLMOA1EwX7k8E5cQ7x2fP/uNgScHiLgbRtipbJNnnuZrud0sn5ARR6OLgvJNW4 o0TuKiCBbnQjQabHdvRojQmEEYhGyaCh75g7Gm1t2XYNw/xsKbNguZzeCgIH/2kn2E 6MNBR3/B09i3hZd54kK7KCth9fOXIaZc5IQtnwNDJBWvIBjf/zVOVZQamJJ6YHhAbM H/SZaXPTEAItQ== From: "Rob Herring (Arm)" Date: Tue, 08 Sep 2026 17:04:53 -0500 Subject: [PATCH v3 16/22] accel: ethosu: Account for kernel dilation in IFM size Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260908-ethosu-fixes-v3-16-490fe215286f@kernel.org> References: <20260908-ethosu-fixes-v3-0-490fe215286f@kernel.org> In-Reply-To: <20260908-ethosu-fixes-v3-0-490fe215286f@kernel.org> To: Tomeu Vizoso , Oded Gabbay , Frank Li , Thomas Zimmermann Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.16-dev Kernel dilation increases the input feature-map area accessed by a kernel operation. Include the x and y dilation settings when calculating the required IFM bounds. Without this, a command stream using x2 dilation can access IFM memory past the range validated by the driver. Fixes: 5a5e9c0228e6 ("accel: Add Arm Ethos-U NPU driver") Cc: stable@vger.kernel.org Assisted-by: LLM Signed-off-by: Rob Herring (Arm) --- v2: - new patch --- drivers/accel/ethosu/ethosu_device.h | 2 ++ drivers/accel/ethosu/ethosu_gem.c | 10 ++++++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/accel/ethosu/ethosu_device.h b/drivers/accel/ethosu/ethosu_device.h index d7e1e3c8ca12..8e23fdbf7f8a 100644 --- a/drivers/accel/ethosu/ethosu_device.h +++ b/drivers/accel/ethosu/ethosu_device.h @@ -88,6 +88,8 @@ struct gen_pool; #define NPU_DMA_REGION_INDEX_MODE BIT(11) #define NPU_OP_CONV_WEIGHTS_IFM2 BIT(0) +#define NPU_KERNEL_DILATION_X BIT(3) +#define NPU_KERNEL_DILATION_Y BIT(4) enum ethosu_cmds { NPU_OP_STOP = 0x0, diff --git a/drivers/accel/ethosu/ethosu_gem.c b/drivers/accel/ethosu/ethosu_gem.c index 9c86f9062f55..578d1b5b955c 100644 --- a/drivers/accel/ethosu/ethosu_gem.c +++ b/drivers/accel/ethosu/ethosu_gem.c @@ -567,10 +567,16 @@ static int calc_sizes(struct drm_device *ddev, ((st->ifm.stride_kernel >> 1) & 0x1) + 1; u32 stride_x = ((st->ifm.stride_kernel >> 5) & 0x2) + (st->ifm.stride_kernel & 0x1) + 1; + u32 dilation_y = 1 + !!(st->ifm.stride_kernel & + NPU_KERNEL_DILATION_Y); + u32 dilation_x = 1 + !!(st->ifm.stride_kernel & + NPU_KERNEL_DILATION_X); s32 ifm_height = st->ofm.height[2] * stride_y + - st->ifm.height[2] - (st->ifm.pad_top + st->ifm.pad_bottom); + st->ifm.height[2] * dilation_y - + (st->ifm.pad_top + st->ifm.pad_bottom); s32 ifm_width = st->ofm.width * stride_x + - st->ifm.width - (st->ifm.pad_left + st->ifm.pad_right); + st->ifm.width * dilation_x - + (st->ifm.pad_left + st->ifm.pad_right); if (ifm_height < 0 || ifm_width < 0) return -EINVAL; -- 2.53.0