From: Elizabeth Figura <zfigura@codeweavers.com>
To: Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
wine-devel@winehq.org, "André Almeida" <andrealmeid@igalia.com>,
"Wolfram Sang" <wsa@kernel.org>,
"Arkadiusz Hiler" <ahiler@codeweavers.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Andy Lutomirski" <luto@kernel.org>,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
"Elizabeth Figura" <zfigura@codeweavers.com>
Subject: [PATCH 01/31] ntsync: Introduce the ntsync driver and character device.
Date: Wed, 14 Feb 2024 17:36:37 -0600 [thread overview]
Message-ID: <20240214233645.9273-2-zfigura@codeweavers.com> (raw)
In-Reply-To: <20240214233645.9273-1-zfigura@codeweavers.com>
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 <zfigura@codeweavers.com>
---
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 <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+
+#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");
--
2.43.0
next prev parent reply other threads:[~2024-02-14 23:53 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-14 23:36 [PATCH 00/31] NT synchronization primitive driver Elizabeth Figura
2024-02-14 23:36 ` Elizabeth Figura [this message]
2024-02-15 1:57 ` [PATCH 01/31] ntsync: Introduce the ntsync driver and character device Randy Dunlap
2024-02-15 19:04 ` Elizabeth Figura
2024-02-14 23:36 ` [PATCH 02/31] ntsync: Introduce NTSYNC_IOC_CREATE_SEM Elizabeth Figura
2024-02-15 7:28 ` Greg Kroah-Hartman
2024-02-15 19:22 ` Elizabeth Figura
2024-02-17 8:03 ` Greg Kroah-Hartman
2024-02-19 19:02 ` Elizabeth Figura
2024-02-14 23:36 ` [PATCH 03/31] ntsync: Introduce NTSYNC_IOC_SEM_POST Elizabeth Figura
2024-02-14 23:36 ` [PATCH 04/31] ntsync: Introduce NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-02-14 23:36 ` [PATCH 05/31] ntsync: Introduce NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-02-14 23:36 ` [PATCH 06/31] ntsync: Introduce NTSYNC_IOC_CREATE_MUTEX Elizabeth Figura
2024-02-14 23:36 ` [PATCH 07/31] ntsync: Introduce NTSYNC_IOC_MUTEX_UNLOCK Elizabeth Figura
2024-02-14 23:36 ` [PATCH 08/31] ntsync: Introduce NTSYNC_IOC_MUTEX_KILL Elizabeth Figura
2024-02-14 23:36 ` [PATCH 09/31] ntsync: Introduce NTSYNC_IOC_CREATE_EVENT Elizabeth Figura
2024-02-14 23:52 ` [PATCH 10/31] ntsync: Introduce NTSYNC_IOC_EVENT_SET Elizabeth Figura
2024-02-14 23:52 ` [PATCH 11/31] ntsync: Introduce NTSYNC_IOC_EVENT_RESET Elizabeth Figura
2024-02-14 23:52 ` [PATCH 12/31] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE Elizabeth Figura
2024-02-14 23:52 ` [PATCH 13/31] ntsync: Introduce NTSYNC_IOC_SEM_READ Elizabeth Figura
2024-02-14 23:52 ` [PATCH 14/31] ntsync: Introduce NTSYNC_IOC_MUTEX_READ Elizabeth Figura
2024-02-14 23:52 ` [PATCH 15/31] ntsync: Introduce NTSYNC_IOC_EVENT_READ Elizabeth Figura
2024-02-14 23:52 ` [PATCH 16/31] ntsync: Introduce alertable waits Elizabeth Figura
2024-02-14 23:52 ` [PATCH 17/31] ntsync: Allow waits to use the REALTIME clock Elizabeth Figura
2024-02-14 23:52 ` [PATCH 18/31] selftests: ntsync: Add some tests for semaphore state Elizabeth Figura
2024-02-14 23:52 ` [PATCH 19/31] selftests: ntsync: Add some tests for mutex state Elizabeth Figura
2024-02-14 23:52 ` [PATCH 20/31] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ANY Elizabeth Figura
2024-02-14 23:52 ` [PATCH 21/31] selftests: ntsync: Add some tests for NTSYNC_IOC_WAIT_ALL Elizabeth Figura
2024-02-14 23:52 ` [PATCH 22/31] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ANY Elizabeth Figura
2024-02-14 23:52 ` [PATCH 23/31] selftests: ntsync: Add some tests for wakeup signaling with WINESYNC_IOC_WAIT_ALL Elizabeth Figura
2024-02-14 23:52 ` [PATCH 24/31] selftests: ntsync: Add some tests for manual-reset event state Elizabeth Figura
2024-02-14 23:53 ` [PATCH 25/31] selftests: ntsync: Add some tests for auto-reset " Elizabeth Figura
2024-02-14 23:53 ` [PATCH 26/31] selftests: ntsync: Add some tests for wakeup signaling with events Elizabeth Figura
2024-02-14 23:53 ` [PATCH 27/31] selftests: ntsync: Add tests for alertable waits Elizabeth Figura
2024-02-14 23:53 ` [PATCH 28/31] selftests: ntsync: Add some tests for wakeup signaling via alerts Elizabeth Figura
2024-02-14 23:53 ` [PATCH 29/31] selftests: ntsync: Add a stress test for contended waits Elizabeth Figura
2024-02-14 23:53 ` [PATCH 30/31] maintainers: Add an entry for ntsync Elizabeth Figura
2024-02-14 23:53 ` [PATCH 31/31] docs: ntsync: Add documentation for the ntsync uAPI Elizabeth Figura
2024-02-15 0:01 ` [PATCH 00/31] NT synchronization primitive driver Elizabeth Figura
2024-02-15 7:24 ` Greg Kroah-Hartman
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