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 07C1B2E569B; Thu, 3 Apr 2025 19:21:03 +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=1743708064; cv=none; b=n2Js3KGKbv7fVTH7ovyyZk1Nms3a77xtGLDP46PY/YqjJpiHw6vbBd4v/hEpNRGnvuGJo7dqzqo5bxA07QgAvxJCjUJv46XTU77r3sEOu3YC9IumxITu8J1l6cRtw/bLv0SjCcdn3AbUkOT5DqN7BvowgMhTeTrL867MOfS9HfY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743708064; c=relaxed/simple; bh=rf9iEoZRBJ7jigfmwyrxsrnGPGWuiGdyfSTU4XzIIls=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=IHoRMYlXqT+PGmJk1JNbOGmQdkAVyAehwTjjzyfBx7EEJweNw8VveLnNCFI/2vZrxOF5Z9YGQlEN5JwA8zd126+2kcIam4MAZEoohcMmhZcAtwS13yA4UBp2Pb3qmV8ZkjCzE9Q5LEPbiLByluOxlNU8KE86qtS0jNcTndBxwOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZvZN4PH7; 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="ZvZN4PH7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2ED47C4CEE9; Thu, 3 Apr 2025 19:21:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743708063; bh=rf9iEoZRBJ7jigfmwyrxsrnGPGWuiGdyfSTU4XzIIls=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZvZN4PH7rskyOi9pWid23c4zYdlhfkGvM60xyGdpDo+WnpKonT/0WGQi6uR1eppVC OL96wqMmzLKKDIU9KpBwAcaFladsG5q8TbHcw28JHVufQZB8MGaGgrQBIdWQLdikMs wxnnQbYEKJooAckGA0em1Ju2IapZh5y9Yjnjd+fCc9muqpW4agj+C4jDceSsSqZRle Ac+OuDBEX7LqZtQvlmFZkfDpfcA4REfYJDSxyKFGZeam0IkGymXdCNUzSkXX3mx4KX wVwV/Z87fqC32qDABdPEI95fQdU/c/jXaPtfjgyWGNLLYm3/5ULIV4A1VdATRgai4s y4JOG5iKC9xJw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: David Yat Sin , Jay Cornwall , Harish Kasiviswanathan , Alex Deucher , Sasha Levin , Felix.Kuehling@amd.com, christian.koenig@amd.com, airlied@gmail.com, simona@ffwll.ch, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 5.4 5/9] drm/amdkfd: clamp queue size to minimum Date: Thu, 3 Apr 2025 15:20:46 -0400 Message-Id: <20250403192050.2682427-5-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403192050.2682427-1-sashal@kernel.org> References: <20250403192050.2682427-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.291 Content-Transfer-Encoding: 8bit From: David Yat Sin [ Upstream commit e90711946b53590371ecce32e8fcc381a99d6333 ] If queue size is less than minimum, clamp it to minimum to prevent underflow when writing queue mqd. Signed-off-by: David Yat Sin Reviewed-by: Jay Cornwall Reviewed-by: Harish Kasiviswanathan Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 10 ++++++++++ include/uapi/linux/kfd_ioctl.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index b99e6b2e0acac..a845eda14ece3 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -169,6 +169,11 @@ static int set_queue_properties_from_user(struct queue_properties *q_properties, return -EINVAL; } + if (args->ring_size < KFD_MIN_QUEUE_RING_SIZE) { + args->ring_size = KFD_MIN_QUEUE_RING_SIZE; + pr_debug("Size lower. clamped to KFD_MIN_QUEUE_RING_SIZE"); + } + if (!access_ok((const void __user *) args->read_pointer_address, sizeof(uint32_t))) { pr_err("Can't access read pointer\n"); @@ -373,6 +378,11 @@ static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p, return -EINVAL; } + if (args->ring_size < KFD_MIN_QUEUE_RING_SIZE) { + args->ring_size = KFD_MIN_QUEUE_RING_SIZE; + pr_debug("Size lower. clamped to KFD_MIN_QUEUE_RING_SIZE"); + } + properties.queue_address = args->ring_base_address; properties.queue_size = args->ring_size; properties.queue_percent = args->queue_percentage; diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h index 20917c59f39c9..899e7c0f5f669 100644 --- a/include/uapi/linux/kfd_ioctl.h +++ b/include/uapi/linux/kfd_ioctl.h @@ -43,6 +43,8 @@ struct kfd_ioctl_get_version_args { #define KFD_MAX_QUEUE_PERCENTAGE 100 #define KFD_MAX_QUEUE_PRIORITY 15 +#define KFD_MIN_QUEUE_RING_SIZE 1024 + struct kfd_ioctl_create_queue_args { __u64 ring_base_address; /* to KFD */ __u64 write_pointer_address; /* from KFD */ -- 2.39.5