1 files changed, 0 insertions, 228 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
deleted file mode 100644
index 72a282e39c3f..000000000000
--- a/virt/kvm/eventfd.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*
- * kvm eventfd support - use eventfd objects to signal various KVM events
- *
- * Copyright 2009 Novell.  All Rights Reserved.
- *
- * Author:
- *	Gregory Haskins <ghaskins@novell.com>
- *
- * This file is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-#include <linux/kvm_host.h>
-#include <linux/workqueue.h>
-#include <linux/syscalls.h>
-#include <linux/wait.h>
-#include <linux/poll.h>
-#include <linux/file.h>
-#include <linux/list.h>
-
-/*
- * --------------------------------------------------------------------
- * irqfd: Allows an fd to be used to inject an interrupt to the guest
- *
- * Credit goes to Avi Kivity for the original idea.
- * --------------------------------------------------------------------
- */
-struct _irqfd {
-	struct kvm               *kvm;
-	int                       gsi;
-	struct file              *file;
-	struct list_head          list;
-	poll_table                pt;
-	wait_queue_head_t        *wqh;
-	wait_queue_t              wait;
-	struct work_struct        work;
-};
-
-static void
-irqfd_inject(struct work_struct *work)
-{
-	struct _irqfd *irqfd = container_of(work, struct _irqfd, work);
-	struct kvm *kvm = irqfd->kvm;
-
-	mutex_lock(&kvm->lock);
-	kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 1);
-	kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, irqfd->gsi, 0);
-	mutex_unlock(&kvm->lock);
-}
-
-static int
-irqfd_wakeup(wait_queue_t *wait, unsigned mode, int sync, void *key)
-{
-	struct _irqfd *irqfd = container_of(wait, struct _irqfd, wait);
-
-	/*
-	 * The wake_up is called with interrupts disabled.  Therefore we need
-	 * to defer the IRQ injection until later since we need to acquire the
-	 * kvm->lock to do so.
-	 */
-	schedule_work(&irqfd->work);
-
-	return 0;
-}
-
-static void
-irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh,
-			poll_table *pt)
-{
-	struct _irqfd *irqfd = container_of(pt, struct _irqfd, pt);
-
-	irqfd->wqh = wqh;
-	add_wait_queue(wqh, &irqfd->wait);
-}
-
-static int
-kvm_assign_irqfd(struct kvm *kvm, int fd, int gsi)
-{
-	struct _irqfd *irqfd;
-	struct file *file = NULL;
-	int ret;
-
-	irqfd = kzalloc(sizeof(*irqfd), GFP_KERNEL);
-	if (!irqfd)
-		return -ENOMEM;
-
-	irqfd->kvm = kvm;
-	irqfd->gsi = gsi;
-	INIT_LIST_HEAD(&irqfd->list);
-	INIT_WORK(&irqfd->work, irqfd_inject);
-
-	/*
-	 * Embed the file* lifetime in the irqfd.
-	 */
-	file = fget(fd);
-	if (IS_ERR(file)) {
-		ret = PTR_ERR(file);
-		goto fail;
-	}
-
-	/*
-	 * Install our own custom wake-up handling so we are notified via
-	 * a callback whenever someone signals the underlying eventfd
-	 */
-	init_waitqueue_func_entry(&irqfd->wait, irqfd_wakeup);
-	init_poll_funcptr(&irqfd->pt, irqfd_ptable_queue_proc);
-
-	ret = file->f_op->poll(file, &irqfd->pt);
-	if (ret < 0)
-		goto fail;
-
-	irqfd->file = file;
-
-	mutex_lock(&kvm->lock);
-	list_add_tail(&irqfd->list, &kvm->irqfds);
-	mutex_unlock(&kvm->lock);
-
-	return 0;
-
-fail:
-	if (irqfd->wqh)
-		remove_wait_queue(irqfd->wqh, &irqfd->wait);
-
-	if (file && !IS_ERR(file))
-		fput(file);
-
-	kfree(irqfd);
-	return ret;
-}
-
-static void
-irqfd_release(struct _irqfd *irqfd)
-{
-	/*
-	 * The ordering is important.  We must remove ourselves from the wqh
-	 * first to ensure no more event callbacks are issued, and then flush
-	 * any previously scheduled work prior to freeing the memory
-	 */
-	remove_wait_queue(irqfd->wqh, &irqfd->wait);
-
-	flush_work(&irqfd->work);
-
-	fput(irqfd->file);
-	kfree(irqfd);
-}
-
-static struct _irqfd *
-irqfd_remove(struct kvm *kvm, struct file *file, int gsi)
-{
-	struct _irqfd *irqfd;
-
-	mutex_lock(&kvm->lock);
-
-	/*
-	 * linear search isn't brilliant, but this should be an infrequent
-	 * slow-path operation, and the list should not grow very large
-	 */
-	list_for_each_entry(irqfd, &kvm->irqfds, list) {
-		if (irqfd->file != file || irqfd->gsi != gsi)
-			continue;
-
-		list_del(&irqfd->list);
-		mutex_unlock(&kvm->lock);
-
-		return irqfd;
-	}
-
-	mutex_unlock(&kvm->lock);
-
-	return NULL;
-}
-
-static int
-kvm_deassign_irqfd(struct kvm *kvm, int fd, int gsi)
-{
-	struct _irqfd *irqfd;
-	struct file *file;
-	int count = 0;
-
-	file = fget(fd);
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-
-	while ((irqfd = irqfd_remove(kvm, file, gsi))) {
-		/*
-		 * We remove the item from the list under the lock, but we
-		 * free it outside the lock to avoid deadlocking with the
-		 * flush_work and the work_item taking the lock
-		 */
-		irqfd_release(irqfd);
-		count++;
-	}
-
-	fput(file);
-
-	return count ? count : -ENOENT;
-}
-
-int
-kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
-{
-	if (flags & KVM_IRQFD_FLAG_DEASSIGN)
-		return kvm_deassign_irqfd(kvm, fd, gsi);
-
-	return kvm_assign_irqfd(kvm, fd, gsi);
-}
-
-void
-kvm_irqfd_release(struct kvm *kvm)
-{
-	struct _irqfd *irqfd, *tmp;
-
-	/* don't bother with the lock..we are shutting down */
-	list_for_each_entry_safe(irqfd, tmp, &kvm->irqfds, list) {
-		list_del(&irqfd->list);
-		irqfd_release(irqfd);
-	}
-}