跪求高手指点迷津，我是一名十分无知的菜鸟，正在学习Deepin系统引导启动IOMMU单元，我不知道（intel_iommu=on）要加在 /boot/grub/grub.cfg文件那个位置才可以使IOMMU虚拟化启动。麻烦各位指点一下，好让我的系统可以启动虚拟化IOMMU单元。我的主板和CPU都支持，BIOS也开启了虚拟化功能，就是不知道如何在Deepin系统引导启动IOMMU单元启动。

电脑系统使用版本：Deepin_2013.1_zh-hans_i386.iso




以下为我的/boot/grub/grub.cfg文件全部数据：

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
set default="0"

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then   search --no-floppy --fs-uuid --set=root b3851994-3f7b-43e5-8b04-78e54a1f5336
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=zh_CN
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
        set gfxpayload="${1}"
        if [ "${1}" = "keep" ]; then
                set vt_handoff=vt.handoff=7
        else
                set vt_handoff=
        fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'LinuxDeepin GNU/Linux' --class linuxdeepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-b3851994-3f7b-43e5-8b04-78e54a1f5336' {
recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        insmod part_msdos
        insmod ext2
        set root='hd0,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then           search --no-floppy --fs-uuid --set=root b3851994-3f7b-43e5-8b04-78e54a1f5336
        fi
        linux        /boot/vmlinuz-3.8.0-34-generic root=UUID=b3851994-3f7b-43e5-8b04-78e54a1f5336 ro locale=zh_CN  quiet splash $vt_handoff
        initrd        /boot/initrd.img-3.8.0-34-generic
}
submenu 'Advanced options for LinuxDeepin GNU/Linux' $menuentry_id_option 'gnulinux-advanced-b3851994-3f7b-43e5-8b04-78e54a1f5336' {
        menuentry 'LinuxDeepin GNU/Linux，Linux 3.8.0-34-generic' --class linuxdeepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-34-generic-advanced-b3851994-3f7b-43e5-8b04-78e54a1f5336' {
        recordfail
                load_video
                gfxmode $linux_gfx_mode
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then                   search --no-floppy --fs-uuid --set=root b3851994-3f7b-43e5-8b04-78e54a1f5336
                fi
                echo        '载入 Linux 3.8.0-34-generic ...'
                linux        /boot/vmlinuz-3.8.0-34-generic root=UUID=b3851994-3f7b-43e5-8b04-78e54a1f5336 ro locale=zh_CN  quiet splash $vt_handoff
                echo        '载入初始化内存盘...'
                initrd        /boot/initrd.img-3.8.0-34-generic
        }
        menuentry 'LinuxDeepin GNU/Linux，Linux 3.8.0-34-generic (恢复模式)' --class linuxdeepin --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.8.0-34-generic-recovery-b3851994-3f7b-43e5-8b04-78e54a1f5336' {
        recordfail
                load_video
                insmod gzio
                insmod part_msdos
                insmod ext2
                set root='hd0,msdos1'
                if [ x$feature_platform_search_hint = xy ]; then                   search --no-floppy --fs-uuid --set=root b3851994-3f7b-43e5-8b04-78e54a1f5336
                fi
                echo        '载入 Linux 3.8.0-34-generic ...'
                linux        /boot/vmlinuz-3.8.0-34-generic root=UUID=b3851994-3f7b-43e5-8b04-78e54a1f5336 ro single nomodeset locale=zh_CN
                echo        '载入初始化内存盘...'
                initrd        /boot/initrd.img-3.8.0-34-generic
        }
}

### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/10_lupin ###
### END /etc/grub.d/10_lupin ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/30_os-prober ###
if [ "x${timeout}" != "x-1" ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###