Move u2mfn from gui repo

u2mfn/.gitignore

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+.tmp_versions/
+.u2mfn.ko.cmd
+.u2mfn.mod.o.cmd
+.u2mfn.o.cmd
+Makefile.xen
+Module.symvers
+modules.order
+u2mfn.ko
+u2mfn.mod.c

u2mfn/Makefile

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+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2010  Rafal Wojtczuk  <rafal@invisiblethingslab.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+#
+
+obj-m                       += u2mfn.o
+
+clean:
+	rm -f *.o *.ko *~
+	rm -f .u2mfn.* *.mod.c Module.symvers modules.order
+	rm -fr .tmp_versions
+	rm -f Makefile.xen

u2mfn/buildme.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# The Qubes OS Project, http://www.qubes-os.org
+#
+# Copyright (C) 2010  Rafal Wojtczuk  <rafal@invisiblethingslab.com>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+#
+
+
+make -C /lib/modules/`uname -r`/build/ SUBDIRS=`pwd` modules \
+	EXTRA_CFLAGS=-I`pwd`/../xenincl

u2mfn/cleanup.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+make -C /lib/modules/`uname -r`/build/ SUBDIRS=`pwd` clean

u2mfn/u2mfn.c

@@ -0,0 +1,163 @@
+/*
+ * The Qubes OS Project, http://www.qubes-os.org
+ *
+ * Copyright (C) 2010  Rafal Wojtczuk  <rafal@invisiblethingslab.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * 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 Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#ifndef FOREIGN_FRAME_BIT
+#include <xen/page.h>
+#endif
+#include <linux/highmem.h>
+#include "/usr/include/u2mfn-kernel.h"
+
+static inline unsigned long virt_to_phys(volatile void *address)
+{
+	return __pa((unsigned long) address);
+}
+
+#if HAVE_GET_PHYS_TO_MACHINE
+#define VIRT_TO_MFN virt_to_mfn
+#else
+extern unsigned long *phys_to_machine_mapping;
+static inline unsigned long VIRT_TO_MFN(void *addr)
+{
+	unsigned int pfn = virt_to_phys(addr) >> PAGE_SHIFT;
+	return phys_to_machine_mapping[pfn] & ~FOREIGN_FRAME_BIT;
+}
+#endif
+
+/// User virtual address to mfn translator
+/**
+    \param cmd ignored
+    \param data the user-specified address
+    \return mfn corresponding to "data" argument, or -1 on error
+*/
+static long u2mfn_ioctl(struct file *f, unsigned int cmd,
+		       unsigned long data)
+{
+	struct page *user_page;
+	void *kaddr;
+	int ret;
+
+	if (_IOC_TYPE(cmd) != U2MFN_MAGIC) {
+		printk("Qubes u2mfn: wrong IOCTL magic");
+		return -ENOTTY;
+	}
+
+	switch (cmd) {
+	case U2MFN_GET_MFN_FOR_PAGE:
+		down_read(&current->mm->mmap_sem);
+		ret = get_user_pages
+		    (current, current->mm, data, 1, 1, 0, &user_page, 0);
+		up_read(&current->mm->mmap_sem);
+		if (ret != 1) {
+			printk("U2MFN_GET_MFN_FOR_PAGE: get_user_pages failed, ret=0x%x\n", ret);
+			return -1;
+		}
+		kaddr = kmap(user_page);
+		ret = VIRT_TO_MFN(kaddr);
+		kunmap(user_page);
+		put_page(user_page);
+		break;
+
+	case U2MFN_GET_LAST_MFN:
+		if (f->private_data)
+			ret = VIRT_TO_MFN(f->private_data);
+		else
+			ret = 0;
+		break;
+
+	default:
+		printk("Qubes u2mfn: wrong ioctl passed!\n");
+		return -ENOTTY;
+	}
+
+
+	return ret;
+}
+
+static int u2mfn_mmap(struct file *f, struct vm_area_struct *vma)
+{
+	int ret;
+	char *kbuf;
+	long length = vma->vm_end - vma->vm_start;
+	printk("u2mfn_mmap: entering, private=%p\n", f->private_data);
+	if (f->private_data)
+		return -EBUSY;
+	if (length != PAGE_SIZE)
+		return -EINVAL;
+	kbuf = (char *) __get_free_page(GFP_KERNEL);
+	if (!kbuf)
+		return -ENOMEM;
+
+	f->private_data = kbuf;
+
+	ret = remap_pfn_range(vma, vma->vm_start,
+			      virt_to_phys(kbuf) >> PAGE_SHIFT,
+			      length, vma->vm_page_prot);
+
+	printk("u2mfn_mmap: calling remap return %d\n", ret);
+	if (ret)
+		return ret;
+
+
+	return 0;
+}
+
+static int u2mfn_release(struct inode *i, struct file *f)
+{
+	printk("u2mfn_release, priv=%p\n", f->private_data);
+	if (f->private_data)
+		__free_page(f->private_data);
+	f->private_data = NULL;
+	return 0;
+}
+
+static struct file_operations u2mfn_fops = {
+	.unlocked_ioctl = u2mfn_ioctl,
+	.mmap = u2mfn_mmap,
+	.release = u2mfn_release
+};
+
+/// u2mfn module registration
+/**
+    tries to register "/proc/u2mfn" pseudofile
+*/
+static int u2mfn_init(void)
+{
+	struct proc_dir_entry *u2mfn_node =
+	    proc_create_data("u2mfn", 0600, NULL,
+			     &u2mfn_fops, 0);
+	if (!u2mfn_node)
+		return -1;
+	return 0;
+}
+
+static void u2mfn_exit(void)
+{
+	remove_proc_entry("u2mfn", 0);
+}
+
+module_init(u2mfn_init);
+module_exit(u2mfn_exit);
+MODULE_LICENSE("GPL");