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linux512-tkg: Update winesync patchset - https://repo.or.cz/linux/zf.git/shortlog/refs/heads/winesync

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This commit is contained in:
Tk-Glitch
2021-06-12 22:43:15 +02:00
parent 82baeebc13
commit 2da317c20e
2 changed files with 157 additions and 143 deletions
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4
PKGBUILD
View File

@@ -59,7 +59,7 @@ else
fi
pkgname=("${pkgbase}" "${pkgbase}-headers")
pkgver="${_basekernel}"."${_sub}"
pkgrel=165
pkgrel=166
pkgdesc='Linux-tkg'
arch=('x86_64') # no i686 in here
url="http://www.kernel.org/"
@@ -464,7 +464,7 @@ case $_basever in
'19661ec0d39f9663452b34433214c755179894528bf73a42f6ba52ccf572832a'
'b302ba6c5bbe8ed19b20207505d513208fae1e678cf4d8e7ac0b154e5fe3f456'
'fc0a3274e3285278e925f4b3bfe803e5e610344bebe5bba063ba202dbaff49c8'
'034d12a73b507133da2c69a34d61efd2f6b6618549650aa26d748142d22002e1'
'f7c68f43599c53ce19a14e6f296e5e0820257e80acb9f52a1dec036d0d9a62ab'
'9fad4a40449e09522899955762c8928ae17f4cdaa16e01239fd12592e9d58177'
'a557b342111849a5f920bbe1c129f3ff1fc1eff62c6bd6685e0972fc88e39911'
'1bb7308e10568cfaad125ea08ed7f311f06d7bfedab40f4b23ff30cfa30ce3fc'

296
linux-tkg-patches/5.12/0007-v5.12-winesync.patch
View File

@@ -40,10 +40,10 @@ index 599bd4493944..825c6b2d2623 100644
==== ===== ======================================================= ================================================================
diff --git a/Documentation/userspace-api/winesync.rst b/Documentation/userspace-api/winesync.rst
new file mode 100644
index 000000000000..751c70f1ffce
index 000000000000..3930b8af76ca
--- /dev/null
+++ b/Documentation/userspace-api/winesync.rst
@@ -0,0 +1,373 @@
@@ -0,0 +1,393 @@
+=====================================
+Wine synchronization primitive driver
+=====================================
@@ -52,12 +52,12 @@ index 000000000000..751c70f1ffce
+
+winesync is a support driver for emulation of NT synchronization
+primitives by the Wine project. It exists because implementation in
+user-space, using existing tools, cannot satisfy performance,
+correctness, and security constraints. It is implemented entirely in
+software, and does not drive any hardware device.
+user-space, using existing tools, cannot simultaneously satisfy
+performance, correctness, and security constraints. It is implemented
+entirely in software, and does not drive any hardware device.
+
+This interface is meant as a compatibility tool only and should not be
+used for general synchronization; instead use generic, versatile
+This interface is meant as a compatibility tool only, and should not
+be used for general synchronization. Instead use generic, versatile
+interfaces such as futex(2) and poll(2).
+
+Synchronization primitives
@@ -73,19 +73,24 @@ index 000000000000..751c70f1ffce
+when the semaphore is created.
+
+A mutex holds a volatile 32-bit recursion count, and a volatile 32-bit
+identifier denoting its owner. The latter is intended to identify the
+thread holding the mutex; however, it is not actually validated
+against earlier calls made by the same thread. A mutex is considered
+signaled when its owner is zero (indicating that it is not owned). The
+recursion count is incremented when a wait is satisfied, and ownership
+is set to the given identifier. A mutex also holds an internal flag
+denoting whether its previous owner has died; such a mutex is said to
+be inconsistent. Owner death is not tracked automatically based on
+thread death, but rather must be communicated using
+``WINESYNC_IOC_KILL_OWNER``.
+identifier denoting its owner. A mutex is considered signaled when its
+owner is zero (indicating that it is not owned). The recursion count
+is incremented when a wait is satisfied, and ownership is set to the
+given identifier.
+
+Objects are represented by signed 32-bit integers. A valid object
+identifier will always be nonnegative.
+A mutex also holds an internal flag denoting whether its previous
+owner has died; such a mutex is said to be inconsistent. Owner death
+is not tracked automatically based on thread death, but rather must be
+communicated using ``WINESYNC_IOC_KILL_OWNER``. An inconsistent mutex
+is inherently considered unowned.
+
+Except for the "unowned" semantics of zero, the actual value of the
+owner identifier is not interpreted by the winesync driver at all. The
+intended use is to store a thread identifier; however, the winesync
+driver does not actually validate that a calling thread provides
+consistent or unique identifiers.
+
+Objects are represented by unsigned 32-bit integers.
+
+Char device
+===========
@@ -94,7 +99,8 @@ index 000000000000..751c70f1ffce
+file description opened on the device represents a unique namespace.
+That is, objects created on one open file description are shared
+across all its individual descriptors, but are not shared with other
+open() calls on the same device.
+open() calls on the same device. The same file description may be
+shared across multiple processes.
+
+ioctl reference
+===============
@@ -103,14 +109,14 @@ index 000000000000..751c70f1ffce
+structures used in ioctl calls::
+
+ struct winesync_sem_args {
+ __s32 sem;
+ __u32 sem;
+ __u32 count;
+ __u32 max;
+ __u32 flags;
+ };
+
+ struct winesync_mutex_args {
+ __s32 mutex;
+ __u32 mutex;
+ __u32 owner;
+ __u32 count;
+ };
@@ -148,7 +154,7 @@ index 000000000000..751c70f1ffce
+ semaphore's state.
+
+ ``sem`` is an output-only argument, which will be filled with the
+ allocated identifier if successful.
+ identifier of the created semaphore if successful.
+
+ Fails with ``EINVAL`` if ``count`` is greater than ``max``, or
+ ``ENOMEM`` if not enough memory is available.
@@ -167,7 +173,7 @@ index 000000000000..751c70f1ffce
+ fails with ``EINVAL``.
+
+ ``mutex`` is an output-only argument, which will be filled with
+ the allocated identifier if successful.
+ the identifier of the created mutex if successful.
+
+ Fails with ``ENOMEM`` if not enough memory is available.
+
@@ -176,9 +182,11 @@ index 000000000000..751c70f1ffce
+ Delete an object of any type. Takes an input-only pointer to a
+ 32-bit integer denoting the object to delete. Fails with ``EINVAL``
+ if the object is not valid. Further ioctls attempting to use the
+ object return ``EINVAL``, unless the object identifier is reused.
+ However, wait ioctls currently in progress are not interrupted, and
+ behave as if the object remains valid.
+ object return ``EINVAL``, unless the object identifier is reused for
+ another object.
+
+ Wait ioctls currently in progress are not interrupted, and behave as
+ if the object remains valid.
+
+.. c:macro:: WINESYNC_IOC_PUT_SEM
+
@@ -186,22 +194,23 @@ index 000000000000..751c70f1ffce
+ :c:type:`winesync_sem_args`, which is used as follows:
+
+ ``sem`` is an input-only argument denoting the semaphore object.
+ If ``sem`` is not a valid semaphore object, the ioctl fails with
+ ``EINVAL``.
+ If ``sem`` does not identify a valid semaphore object, the ioctl
+ fails with ``EINVAL``.
+
+ ``count`` contains on input the count to add to the semaphore, and
+ on output is filled with its previous count.
+
+ ``max`` and ``flags`` are not used.
+
+ If adding ``count`` to the semaphore's current count would raise the
+ latter past the semaphore's maximum count, the ioctl fails with
+ ``EOVERFLOW`` and the semaphore is not affected. If raising the
+ semaphore's count causes it to become signaled, eligible threads
+ waiting on this semaphore will be woken and the semaphore's count
+ decremented appropriately.
+
+ The operation is atomic and totally ordered with respect to other
+ operations on the same semaphore. If adding ``count`` to the
+ semaphore's current count would raise the latter past the
+ semaphore's maximum count, the ioctl fails with ``EOVERFLOW`` and
+ the semaphore is not affected. If raising the semaphore's count
+ causes it to become signaled, eligible threads waiting on this
+ semaphore will be woken and the semaphore's count decremented
+ appropriately.
+ operations on the same semaphore.
+
+.. c:macro:: WINESYNC_IOC_PULSE_SEM
+
@@ -209,15 +218,14 @@ index 000000000000..751c70f1ffce
+ notable exception: the semaphore is always left in an *unsignaled*
+ state, regardless of the initial count or the count added by the
+ ioctl. That is, the count after a pulse operation will always be
+ zero. The entire operation is atomic.
+ zero.
+
+ Hence, if the semaphore was created with the
+ ``WINESYNC_SEM_GETONWAIT`` flag set, and an unsignaled semaphore is
+ "pulsed" with a count of 2, at most two eligible threads (i.e.
+ threads not otherwise constrained due to ``WINESYNC_IOC_WAIT_ALL``)
+ will be woken up, and any others will remain sleeping. If less than
+ two eligible threads are waiting on the semaphore, all of them will
+ be woken up, and the semaphore's count will remain at zero. On the
+ "pulsed" with a count of 2, at most two eligible threads will be
+ woken up, and any others will remain sleeping. If less than two
+ eligible threads are waiting on the semaphore, all of them will be
+ woken up, and the semaphore's count will remain at zero. On the
+ other hand, if the semaphore was created without the
+ ``WINESYNC_SEM_GETONWAIT``, all eligible threads will be woken up,
+ making ``count`` effectively redundant. In either case, a
@@ -229,6 +237,9 @@ index 000000000000..751c70f1ffce
+ ``EOVERFLOW``. However, in this case the semaphore's count will
+ still be reset to zero.
+
+ The operation is atomic and totally ordered with respect to other
+ operations on the same semaphore.
+
+.. c:macro:: WINESYNC_IOC_GET_SEM
+
+ Attempt to acquire a semaphore object. Takes an input-only pointer
@@ -249,22 +260,24 @@ index 000000000000..751c70f1ffce
+ :c:type:`winesync_mutex_args`, which is used as follows:
+
+ ``mutex`` is an input-only argument denoting the mutex object. If
+ ``mutex`` is not a valid mutex object, the ioctl fails with
+ ``EINVAL``.
+ ``mutex`` does not identify a valid mutex object, the ioctl fails
+ with ``EINVAL``.
+
+ ``owner`` is an input-only argument denoting the mutex owner.
+ ``owner`` must be nonzero, else the ioctl fails with ``EINVAL``.
+ If ``owner`` is not the current owner of the mutex, the ioctl
+ fails with ``EPERM``.
+ ``owner`` is an input-only argument denoting the mutex owner. If
+ ``owner`` is zero, the ioctl fails with ``EINVAL``. If ``owner``
+ is not the current owner of the mutex, the ioctl fails with
+ ``EPERM``.
+
+ ``count`` is an output-only argument which will be filled on
+ success with the mutex's previous recursion count.
+
+ The mutex's count will be decremented by one. The operation is
+ atomic and totally ordered with respect to other operations on the
+ same mutex. If decrementing the mutex's count causes it to become
+ zero, the mutex is marked as unowned and signaled, and eligible
+ threads waiting on it will be woken as appropriate.
+ The mutex's count will be decremented by one. If decrementing the
+ mutex's count causes it to become zero, the mutex is marked as
+ unowned and signaled, and eligible threads waiting on it will be
+ woken as appropriate.
+
+ The operation is atomic and totally ordered with respect to other
+ operations on the same mutex.
+
+.. c:macro:: WINESYNC_IOC_READ_SEM
+
@@ -272,8 +285,8 @@ index 000000000000..751c70f1ffce
+ struct :c:type:`winesync_sem_args`, which is used as follows:
+
+ ``sem`` is an input-only argument denoting the semaphore object.
+ If ``sem`` is not a valid semaphore object, the ioctl fails with
+ ``EINVAL``.
+ If ``sem`` does not identify a valid semaphore object, the ioctl
+ fails with ``EINVAL``.
+
+ ``count`` and ``max`` are output-only arguments, which will be
+ filled with the current and maximum count of the given semaphore.
@@ -290,8 +303,8 @@ index 000000000000..751c70f1ffce
+ :c:type:`winesync_mutex_args`, which is used as follows:
+
+ ``mutex`` is an input-only argument denoting the mutex object. If
+ ``mutex`` is not a valid mutex object, the ioctl fails with
+ ``EINVAL``.
+ ``mutex`` does not identify a valid mutex object, the ioctl fails
+ with ``EINVAL``.
+
+ ``count`` and ``owner`` are output-only arguments, which will be
+ filled with the current recursion count and owner of the given
@@ -299,23 +312,32 @@ index 000000000000..751c70f1ffce
+ set to zero.
+
+ If the mutex is marked as inconsistent, the function fails with
+ ``EOWNERDEAD``.
+ ``EOWNERDEAD``. In this case, ``count`` and ``owner`` are set to
+ zero.
+
+ The operation is atomic and totally ordered with respect to other
+ operations on the same mutex.
+
+.. c:macro:: WINESYNC_IOC_KILL_OWNER
+
+ Mark any mutexes owned by the given identifier as unowned and
+ Mark any mutexes owned by the given owner as unowned and
+ inconsistent. Takes an input-only pointer to a 32-bit integer
+ denoting the owner. If the owner is zero, the ioctl fails with
+ ``EINVAL``.
+
+ For each mutex currently owned by the given owner, eligible threads
+ waiting on said mutex will be woken as appropriate (and such waits
+ will fail with ``EOWNERDEAD``, as described below).
+
+ The operation as a whole is not atomic; however, the modification of
+ each mutex is atomic and totally ordered with respect to other
+ operations on the same mutex.
+
+.. c:macro:: WINESYNC_IOC_WAIT_ANY
+
+ Poll on any of a list of objects, atomically acquiring (at most)
+ one. Takes a pointer to struct :c:type:`winesync_wait_args`, which
+ is used as follows:
+ Poll on any of a list of objects, atomically acquiring at most one.
+ Takes a pointer to struct :c:type:`winesync_wait_args`, which is
+ used as follows:
+
+ ``timeout`` is an optional input-only pointer to a 64-bit struct
+ :c:type:`timespec` (specified as an integer so that the structure
@@ -331,9 +353,6 @@ index 000000000000..751c70f1ffce
+ has the same size regardless of architecture). If any identifier
+ is invalid, the function fails with ``EINVAL``.
+
+ ``count`` is an input-only argument denoting the number of
+ elements in ``objs``.
+
+ ``owner`` is an input-only argument denoting the mutex owner
+ identifier. If any object in ``objs`` is a mutex, the ioctl will
+ attempt to acquire that mutex on behalf of ``owner``. If ``owner``
@@ -341,7 +360,7 @@ index 000000000000..751c70f1ffce
+
+ ``index`` is an output-only argument which, if the ioctl is
+ successful, is filled with the index of the object actually
+ signaled.
+ signaled. If unsuccessful, ``index`` is not modified.
+
+ ``pad`` is unused, and exists to keep a consistent structure size.
+
@@ -365,7 +384,7 @@ index 000000000000..751c70f1ffce
+ one is signaled. If two wait operations are queued on the same
+ semaphore (which was not created with the ``WINESYNC_SEM_GETONWAIT``
+ flag set), and a value of one is posted to it, only one is signaled.
+ The order in which threads are signaled is not guaranteed.
+ The order in which threads are signaled is not specified.
+
+ (If two wait operations are queued on the same semaphore, and the
+ semaphore was created with the ``WINESYNC_SEM_GETONWAIT`` flag set,
@@ -391,7 +410,7 @@ index 000000000000..751c70f1ffce
+ Poll on a list of objects, atomically acquiring all of them. Takes a
+ pointer to struct :c:type:`winesync_wait_args`, which is used
+ identically to ``WINESYNC_IOC_WAIT_ANY``, except that ``index`` is
+ unused.
+ always filled with zero on success.
+
+ This function attempts to simultaneously acquire all of the given
+ objects. If unable to do so, it sleeps until all objects become
@@ -401,9 +420,10 @@ index 000000000000..751c70f1ffce
+
+ Objects may become signaled and subsequently designaled (through
+ acquisition by other threads) while this thread is sleeping. Only
+ once all objects are simultaneously signaled does the ioctl return.
+ The acquisition is atomic and totally ordered with respect to other
+ operations on any of the given objects.
+ once all objects are simultaneously signaled does the ioctl acquire
+ them and return. The entire acquisition is atomic and totally
+ ordered with respect to other operations on any of the given
+ objects.
+
+ If an inconsistent mutex is acquired, the ioctl fails with
+ ``EOWNERDEAD``. Similarly to ``WINESYNC_IOC_WAIT_ANY``, all objects
@@ -411,7 +431,7 @@ index 000000000000..751c70f1ffce
+ objects are specified, there is no way to know which were marked as
+ inconsistent.
+
+ Unlike ``WINESYNC_IOC_WAIT_ALL``, it is not valid to pass the same
+ Unlike ``WINESYNC_IOC_WAIT_ANY``, it is not valid to pass the same
+ object more than once. If this is attempted, the function fails with
+ ``EINVAL``.
+
@@ -470,10 +490,10 @@ index 99b6f15a3c70..327c9628c479 100644
+obj-$(CONFIG_WINESYNC) += winesync.o
diff --git a/drivers/misc/winesync.c b/drivers/misc/winesync.c
new file mode 100644
index 000000000000..ff5749206aa9
index 000000000000..36f3d9fe8be1
--- /dev/null
+++ b/drivers/misc/winesync.c
@@ -0,0 +1,1047 @@
@@ -0,0 +1,1045 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * winesync.c - Kernel driver for Wine synchronization primitives
@@ -482,11 +502,10 @@ index 000000000000..ff5749206aa9
+ */
+
+#include <linux/fs.h>
+#include <linux/idr.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/xarray.h>
+#include <uapi/linux/winesync.h>
+
+#define WINESYNC_NAME "winesync"
@@ -497,6 +516,7 @@ index 000000000000..ff5749206aa9
+};
+
+struct winesync_obj {
+ struct rcu_head rhead;
+ struct kref refcount;
+ spinlock_t lock;
+
@@ -585,16 +605,16 @@ index 000000000000..ff5749206aa9
+ * at the same time.
+ */
+ spinlock_t wait_all_lock;
+ struct mutex table_lock;
+ struct idr objects;
+
+ struct xarray objects;
+};
+
+static struct winesync_obj *get_obj(struct winesync_device *dev, int id)
+static struct winesync_obj *get_obj(struct winesync_device *dev, __u32 id)
+{
+ struct winesync_obj *obj;
+
+ rcu_read_lock();
+ obj = idr_find(&dev->objects, id);
+ obj = xa_load(&dev->objects, id);
+ if (obj && !kref_get_unless_zero(&obj->refcount))
+ obj = NULL;
+ rcu_read_unlock();
@@ -604,10 +624,9 @@ index 000000000000..ff5749206aa9
+
+static void destroy_obj(struct kref *ref)
+{
+ struct winesync_obj *obj;
+ struct winesync_obj *obj = container_of(ref, struct winesync_obj, refcount);
+
+ obj = container_of(ref, struct winesync_obj, refcount);
+ kfree(obj);
+ kfree_rcu(obj, rhead);
+}
+
+static void put_obj(struct winesync_obj *obj)
@@ -623,9 +642,9 @@ index 000000000000..ff5749206aa9
+ if (!dev)
+ return -ENOMEM;
+
+ idr_init(&dev->objects);
+ spin_lock_init(&dev->wait_all_lock);
+ mutex_init(&dev->table_lock);
+
+ xa_init_flags(&dev->objects, XA_FLAGS_ALLOC);
+
+ file->private_data = dev;
+ return nonseekable_open(inode, file);
@@ -635,22 +654,19 @@ index 000000000000..ff5749206aa9
+{
+ struct winesync_device *dev = file->private_data;
+ struct winesync_obj *obj;
+ int id;
+ unsigned long id;
+
+ mutex_lock(&dev->table_lock);
+ idr_for_each_entry(&dev->objects, obj, id) {
+ idr_remove(&dev->objects, id);
+ synchronize_rcu();
+ xa_for_each(&dev->objects, id, obj)
+ put_obj(obj);
+ }
+ mutex_unlock(&dev->table_lock);
+
+ xa_destroy(&dev->objects);
+
+ kfree(dev);
+
+ return 0;
+}
+
+static void winesync_init_obj(struct winesync_obj *obj)
+static void init_obj(struct winesync_obj *obj)
+{
+ kref_init(&obj->refcount);
+ refcount_set(&obj->all_hint, 1);
@@ -793,6 +809,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_sem_args __user *user_args = argp;
+ struct winesync_sem_args args;
+ struct winesync_obj *sem;
+ __u32 id;
+ int ret;
+
+ if (copy_from_user(&args, argp, sizeof(args)))
@@ -808,22 +825,19 @@ index 000000000000..ff5749206aa9
+ if (!sem)
+ return -ENOMEM;
+
+ winesync_init_obj(sem);
+ init_obj(sem);
+ sem->type = WINESYNC_TYPE_SEM;
+ sem->u.sem.count = args.count;
+ sem->u.sem.max = args.max;
+ sem->u.sem.flags = args.flags;
+
+ mutex_lock(&dev->table_lock);
+ ret = idr_alloc(&dev->objects, sem, 0, 0, GFP_KERNEL);
+ mutex_unlock(&dev->table_lock);
+
+ ret = xa_alloc(&dev->objects, &id, sem, xa_limit_32b, GFP_KERNEL);
+ if (ret < 0) {
+ kfree(sem);
+ return ret;
+ }
+
+ return put_user(ret, &user_args->sem);
+ return put_user(id, &user_args->sem);
+}
+
+static int winesync_create_mutex(struct winesync_device *dev, void __user *argp)
@@ -831,6 +845,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_mutex_args __user *user_args = argp;
+ struct winesync_mutex_args args;
+ struct winesync_obj *mutex;
+ __u32 id;
+ int ret;
+
+ if (copy_from_user(&args, argp, sizeof(args)))
@@ -843,35 +858,29 @@ index 000000000000..ff5749206aa9
+ if (!mutex)
+ return -ENOMEM;
+
+ winesync_init_obj(mutex);
+ init_obj(mutex);
+ mutex->type = WINESYNC_TYPE_MUTEX;
+ mutex->u.mutex.count = args.count;
+ mutex->u.mutex.owner = args.owner;
+
+ mutex_lock(&dev->table_lock);
+ ret = idr_alloc(&dev->objects, mutex, 0, 0, GFP_KERNEL);
+ mutex_unlock(&dev->table_lock);
+
+ ret = xa_alloc(&dev->objects, &id, mutex, xa_limit_32b, GFP_KERNEL);
+ if (ret < 0) {
+ kfree(mutex);
+ return ret;
+ }
+
+ return put_user(ret, &user_args->mutex);
+ return put_user(id, &user_args->mutex);
+}
+
+static int winesync_delete(struct winesync_device *dev, void __user *argp)
+{
+ struct winesync_obj *obj;
+ __s32 id;
+ __u32 id;
+
+ if (get_user(id, (__s32 __user *)argp))
+ if (get_user(id, (__u32 __user *)argp))
+ return -EFAULT;
+
+ mutex_lock(&dev->table_lock);
+ obj = idr_remove(&dev->objects, id);
+ mutex_unlock(&dev->table_lock);
+
+ obj = xa_erase(&dev->objects, id);
+ if (!obj)
+ return -EINVAL;
+
@@ -883,9 +892,9 @@ index 000000000000..ff5749206aa9
+{
+ struct winesync_obj *sem;
+ int ret = -EWOULDBLOCK;
+ __s32 id;
+ __u32 id;
+
+ if (get_user(id, (__s32 __user *)argp))
+ if (get_user(id, (__u32 __user *)argp))
+ return -EFAULT;
+
+ sem = get_obj(dev, id);
@@ -1062,7 +1071,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_sem_args __user *user_args = argp;
+ struct winesync_sem_args args;
+ struct winesync_obj *sem;
+ __s32 id;
+ __u32 id;
+
+ if (get_user(id, &user_args->sem))
+ return -EFAULT;
@@ -1094,7 +1103,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_mutex_args __user *user_args = argp;
+ struct winesync_mutex_args args;
+ struct winesync_obj *mutex;
+ __s32 id;
+ __u32 id;
+ int ret;
+
+ if (get_user(id, &user_args->mutex))
@@ -1137,8 +1146,8 @@ index 000000000000..ff5749206aa9
+static int winesync_kill_owner(struct winesync_device *dev, void __user *argp)
+{
+ struct winesync_obj *obj;
+ unsigned long id;
+ __u32 owner;
+ int id;
+
+ if (get_user(owner, (__u32 __user *)argp))
+ return -EFAULT;
@@ -1147,7 +1156,7 @@ index 000000000000..ff5749206aa9
+
+ rcu_read_lock();
+
+ idr_for_each_entry(&dev->objects, obj, id) {
+ xa_for_each(&dev->objects, id, obj) {
+ if (!kref_get_unless_zero(&obj->refcount))
+ continue;
+
@@ -1210,8 +1219,8 @@ index 000000000000..ff5749206aa9
+}
+
+/*
+ * Allocate and initialize most of the winesync_q structure, but do not queue us
+ * yet. Also, calculate the relative timeout in jiffies.
+ * Allocate and initialize the winesync_q structure, but do not queue us yet.
+ * Also, calculate the relative timeout.
+ */
+static int setup_wait(struct winesync_device *dev,
+ const struct winesync_wait_args *args, bool all,
@@ -1220,7 +1229,7 @@ index 000000000000..ff5749206aa9
+ const __u32 count = args->count;
+ struct winesync_q *q;
+ ktime_t timeout = 0;
+ __s32 *ids;
+ __u32 *ids;
+ __u32 i, j;
+
+ if (args->timeout) {
@@ -1308,6 +1317,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_wait_args args;
+ struct winesync_q *q;
+ ktime_t timeout;
+ int signaled;
+ __u32 i;
+ int ret;
+
@@ -1360,13 +1370,14 @@ index 000000000000..ff5749206aa9
+ put_obj(obj);
+ }
+
+ if (atomic_read(&q->signaled) != -1) {
+ signaled = atomic_read(&q->signaled);
+ if (signaled != -1) {
+ struct winesync_wait_args __user *user_args = argp;
+
+ /* even if we caught a signal, we need to communicate success */
+ ret = q->ownerdead ? -EOWNERDEAD : 0;
+
+ if (put_user(atomic_read(&q->signaled), &user_args->index))
+ if (put_user(signaled, &user_args->index))
+ ret = -EFAULT;
+ } else if (!ret) {
+ ret = -ETIMEDOUT;
@@ -1381,6 +1392,7 @@ index 000000000000..ff5749206aa9
+ struct winesync_wait_args args;
+ struct winesync_q *q;
+ ktime_t timeout;
+ int signaled;
+ __u32 i;
+ int ret;
+
@@ -1441,9 +1453,15 @@ index 000000000000..ff5749206aa9
+
+ spin_unlock(&dev->wait_all_lock);
+
+ if (atomic_read(&q->signaled) != -1) {
+ signaled = atomic_read(&q->signaled);
+ if (signaled != -1) {
+ struct winesync_wait_args __user *user_args = argp;
+
+ /* even if we caught a signal, we need to communicate success */
+ ret = q->ownerdead ? -EOWNERDEAD : 0;
+
+ if (put_user(signaled, &user_args->index))
+ ret = -EFAULT;
+ } else if (!ret) {
+ ret = -ETIMEDOUT;
+ }
@@ -1535,7 +1553,7 @@ index 0676f18093f9..350aecfcfb29 100644
struct device;
diff --git a/include/uapi/linux/winesync.h b/include/uapi/linux/winesync.h
new file mode 100644
index 000000000000..efc591795249
index 000000000000..d401f12f4a25
--- /dev/null
+++ b/include/uapi/linux/winesync.h
@@ -0,0 +1,61 @@
@@ -1551,17 +1569,17 @@ index 000000000000..efc591795249
+
+#include <linux/types.h>
+
+#define WINESYNC_SEM_GETONWAIT 1
+#define WINESYNC_SEM_GETONWAIT 0x1
+
+struct winesync_sem_args {
+ __s32 sem;
+ __u32 sem;
+ __u32 count;
+ __u32 max;
+ __u32 flags;
+};
+
+struct winesync_mutex_args {
+ __s32 mutex;
+ __u32 mutex;
+ __u32 owner;
+ __u32 count;
+};
@@ -1579,7 +1597,7 @@ index 000000000000..efc591795249
+
+#define WINESYNC_IOC_CREATE_SEM _IOWR(WINESYNC_IOC_BASE, 0, \
+ struct winesync_sem_args)
+#define WINESYNC_IOC_DELETE _IOW (WINESYNC_IOC_BASE, 1, __s32)
+#define WINESYNC_IOC_DELETE _IOW (WINESYNC_IOC_BASE, 1, __u32)
+#define WINESYNC_IOC_PUT_SEM _IOWR(WINESYNC_IOC_BASE, 2, \
+ struct winesync_sem_args)
+#define WINESYNC_IOC_WAIT_ANY _IOWR(WINESYNC_IOC_BASE, 3, \
@@ -1595,7 +1613,7 @@ index 000000000000..efc591795249
+ struct winesync_sem_args)
+#define WINESYNC_IOC_READ_MUTEX _IOWR(WINESYNC_IOC_BASE, 9, \
+ struct winesync_mutex_args)
+#define WINESYNC_IOC_GET_SEM _IOW (WINESYNC_IOC_BASE, 10, __s32)
+#define WINESYNC_IOC_GET_SEM _IOW (WINESYNC_IOC_BASE, 10, __u32)
+#define WINESYNC_IOC_PULSE_SEM _IOWR(WINESYNC_IOC_BASE, 11, \
+ struct winesync_sem_args)
+
@@ -1635,10 +1653,10 @@ index 000000000000..60539c826d06
+CONFIG_WINESYNC=y
diff --git a/tools/testing/selftests/drivers/winesync/winesync.c b/tools/testing/selftests/drivers/winesync/winesync.c
new file mode 100644
index 000000000000..52373fcd5c8c
index 000000000000..c4ac22b7fdb7
--- /dev/null
+++ b/tools/testing/selftests/drivers/winesync/winesync.c
@@ -0,0 +1,1486 @@
@@ -0,0 +1,1482 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Various unit tests for the "winesync" synchronization primitive driver.
@@ -2343,8 +2361,7 @@ index 000000000000..52373fcd5c8c
+ struct winesync_wait_args wait_args = {0};
+ struct winesync_sem_args sem_args = {0};
+ struct timespec timeout;
+ __s32 objs[2];
+ __u32 owner;
+ __u32 objs[2], owner;
+ int fd, ret;
+
+ clock_gettime(CLOCK_MONOTONIC, &timeout);
@@ -2542,8 +2559,7 @@ index 000000000000..52373fcd5c8c
+ struct winesync_wait_args wait_args = {0};
+ struct winesync_sem_args sem_args = {0};
+ struct timespec timeout;
+ __s32 objs[2];
+ __u32 owner;
+ __u32 objs[2], owner;
+ int fd, ret;
+
+ clock_gettime(CLOCK_MONOTONIC, &timeout);
@@ -2694,7 +2710,7 @@ index 000000000000..52373fcd5c8c
+ struct winesync_mutex_args mutex_args = {0};
+ struct winesync_wait_args wait_args = {0};
+ struct winesync_sem_args sem_args = {0};
+ __s32 objs[2] = {0};
+ __u32 objs[2] = {0};
+ int fd, ret;
+
+ fd = open("/dev/winesync", O_CLOEXEC | O_RDONLY);
@@ -2793,7 +2809,7 @@ index 000000000000..52373fcd5c8c
+struct wake_args
+{
+ int fd;
+ __s32 obj;
+ __u32 obj;
+};
+
+struct wait_args
@@ -2837,9 +2853,8 @@ index 000000000000..52373fcd5c8c
+ struct winesync_sem_args sem_args = {0};
+ struct wait_args thread_args;
+ struct timespec timeout;
+ __u32 objs[2], owner;
+ pthread_t thread;
+ __s32 objs[2];
+ __u32 owner;
+ int fd, ret;
+
+ fd = open("/dev/winesync", O_CLOEXEC | O_RDONLY);
@@ -2989,9 +3004,8 @@ index 000000000000..52373fcd5c8c
+ struct winesync_sem_args sem_args = {0};
+ struct timespec timeout, timeout2;
+ struct wait_args thread_args;
+ __u32 objs[2], owner;
+ pthread_t thread;
+ __s32 objs[2];
+ __u32 owner;
+ int fd, ret;
+
+ fd = open("/dev/winesync", O_CLOEXEC | O_RDONLY);