From patchwork Wed Feb 14 23:36:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elizabeth Figura X-Patchwork-Id: 773206 Received: from mail.codeweavers.com (mail.codeweavers.com [4.36.192.163]) (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 C522D1474DB; Wed, 14 Feb 2024 23:53:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=4.36.192.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707954816; cv=none; b=iOkRGCq0oGoq9elvMXMsvdpJQUbC7PxQ0R8awRvvuaC1Me98V2ANrkQrWL9bLnSfCFe0UX2jsT19f8WIqVycstxGuVORz99/NmYW9JQYlLNJiGIptz2YL0FtKaFakiEiHIBnodhx4Sj2rJtHRbSYlfqVjicTNs9qGUsikW151Ys= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707954816; c=relaxed/simple; bh=I4trA2JfrK9wBwFoc8bTAUMVwA5tJ+kKV0vPGN6dfHk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=e5U50vVFdqQsw20QQhmeYbXOH1sR3e4SjpK23To1yNMJ4T7ir/UtGSEz6vL3kGi21YYIZS4eEWUQDBx/4DBdldfHZ31CYEjxlQL3JAQf8gDN6VwIKiCA2P2qyP0TrlI42ON0MiciWSg0re9tRbxLOCM/+5g++3v6x7Y5DNi+t/8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com; spf=pass smtp.mailfrom=codeweavers.com; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b=Tx3FeU36; arc=none smtp.client-ip=4.36.192.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b="Tx3FeU36" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codeweavers.com; s=s1; h=Message-ID:Date:Subject:Cc:To:From:Sender; bh=X/IZwfYWP9znQfddabnSoi+xBA9zWsqNxvzC3bQDVaM=; b=Tx3FeU36Xq2ZUqbwOw5gKia8RC I+KdCplVS2o4/O6CjoEVbGmOmvXv1cd8SoGO5MPi4hbWJh4WOyxaQssM8x8BTNgCKITP5zdHC9ZKJ WkecUFN9f9Ph9S0NDVyl63Jgns+5yWJ855ZOXKSMfuYW2FDIKlixl4HD/8eyIk1cXNIqqvYVqvAqb g00v7uT2y+RrMm9auQ6uH0hwivRq9McI7Ny8oB1juCnPfq8WHXJMxrnytr+XUFMO+mn3Grzg7TNb/ H47/nAUyuKcFUR3ETIH/rjgO5rKUUHTUlMr1jmRfrju7IXy5P1pc0ydj7JYFCNbCv1t1iJEth2fYH DyO0ofDw==; Received: from cw137ip160.mn.codeweavers.com ([10.69.137.160] helo=camazotz.mn.codeweavers.com) by mail.codeweavers.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1raOoV-00GbiL-2O; Wed, 14 Feb 2024 17:37:15 -0600 From: Elizabeth Figura To: Arnd Bergmann , Greg Kroah-Hartman , Jonathan Corbet , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, wine-devel@winehq.org, =?utf-8?q?Andr=C3=A9_Almeida?= , Wolfram Sang , Arkadiusz Hiler , Peter Zijlstra , Andy Lutomirski , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Elizabeth Figura Subject: [PATCH 01/31] ntsync: Introduce the ntsync driver and character device. Date: Wed, 14 Feb 2024 17:36:37 -0600 Message-ID: <20240214233645.9273-2-zfigura@codeweavers.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240214233645.9273-1-zfigura@codeweavers.com> References: <20240214233645.9273-1-zfigura@codeweavers.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 ntsync uses a misc device as the simplest and least intrusive uAPI interface. Each file description on the device represents an isolated NT instance, intended to correspond to a single NT virtual machine. Signed-off-by: Elizabeth Figura --- drivers/misc/Kconfig | 9 ++++++++ drivers/misc/Makefile | 1 + drivers/misc/ntsync.c | 52 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 62 insertions(+) create mode 100644 drivers/misc/ntsync.c diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 4fb291f0bf7c..bdd8a71bd853 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -504,6 +504,15 @@ config OPEN_DICE measured boot flow. Userspace can use CDIs for remote attestation and sealing. +config NTSYNC + tristate "NT synchronization primitive emulation" + help + This module provides kernel support for emulation of Windows NT + synchronization primitives. It is not a hardware driver. + + To compile this driver as a module, choose M here: the + module will be called ntsync. + If unsure, say N. config VCPU_STALL_DETECTOR diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index ea6ea5bbbc9c..153a3f4837e8 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_PVPANIC) += pvpanic/ obj-$(CONFIG_UACCE) += uacce/ obj-$(CONFIG_XILINX_SDFEC) += xilinx_sdfec.o obj-$(CONFIG_HISI_HIKEY_USB) += hisi_hikey_usb.o +obj-$(CONFIG_NTSYNC) += ntsync.o obj-$(CONFIG_HI6421V600_IRQ) += hi6421v600-irq.o obj-$(CONFIG_OPEN_DICE) += open-dice.o obj-$(CONFIG_GP_PCI1XXXX) += mchp_pci1xxxx/ diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c new file mode 100644 index 000000000000..e4969ef90722 --- /dev/null +++ b/drivers/misc/ntsync.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ntsync.c - Kernel driver for NT synchronization primitives + * + * Copyright (C) 2024 Elizabeth Figura + */ + +#include +#include +#include + +#define NTSYNC_NAME "ntsync" + +static int ntsync_char_open(struct inode *inode, struct file *file) +{ + return nonseekable_open(inode, file); +} + +static int ntsync_char_release(struct inode *inode, struct file *file) +{ + return 0; +} + +static long ntsync_char_ioctl(struct file *file, unsigned int cmd, + unsigned long parm) +{ + switch (cmd) { + default: + return -ENOIOCTLCMD; + } +} + +static const struct file_operations ntsync_fops = { + .owner = THIS_MODULE, + .open = ntsync_char_open, + .release = ntsync_char_release, + .unlocked_ioctl = ntsync_char_ioctl, + .compat_ioctl = compat_ptr_ioctl, + .llseek = no_llseek, +}; + +static struct miscdevice ntsync_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = NTSYNC_NAME, + .fops = &ntsync_fops, +}; + +module_misc_device(ntsync_misc); + +MODULE_AUTHOR("Elizabeth Figura"); +MODULE_DESCRIPTION("Kernel driver for NT synchronization primitives"); +MODULE_LICENSE("GPL");