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Jeremy Fitzhardinge 0e91398f2a xen: implement save/restore 
This patch implements Xen save/restore and migration.

Saving is triggered via xenbus, which is polled in
drivers/xen/manage.c.  When a suspend request comes in, the kernel
prepares itself for saving by:

1 - Freeze all processes.  This is primarily to prevent any
    partially-completed pagetable updates from confusing the suspend
    process.  If CONFIG_PREEMPT isn't defined, then this isn't necessary.

2 - Suspend xenbus and other devices

3 - Stop_machine, to make sure all the other vcpus are quiescent.  The
    Xen tools require the domain to run its save off vcpu0.

4 - Within the stop_machine state, it pins any unpinned pgds (under
    construction or destruction), performs canonicalizes various other
    pieces of state (mostly converting mfns to pfns), and finally

5 - Suspend the domain

Restore reverses the steps used to save the domain, ending when all
the frozen processes are thawed.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-27 10:11:38 +02:00
..
accessibility Kconfig: improved help for CONFIG_ACCESSIBILITY 2008-05-08 10:46:55 -07:00
acorn/char
acpi Fix ACPI vs proc_create_data() mismerge 2008-04-30 16:26:27 -07:00
amba
ata drivers/ata: trim trailing whitespace 2008-05-19 17:56:10 -04:00
atm drivers/atm/: remove CVS keywords 2008-05-20 14:52:25 -07:00
auxdisplay
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-05-20 17:23:03 -07:00
block m68k: Return -ENODEV if no device is found 2008-05-18 13:28:50 -07:00
bluetooth hci_usb.h: fix hard-to-trigger race 2008-05-02 16:45:10 -07:00
cdrom
char xen-console: add save/restore 2008-05-27 10:11:37 +02:00
clocksource
connector
cpufreq
cpuidle
crypto
dca
dio
dma iop-adma: fixup some kzalloc/memset confusions 2008-05-20 13:51:20 -07:00
edac dev_name introduction fall out fix 2008-05-05 15:08:38 -07:00
eisa
firewire firewire: prevent userspace from accessing shut down devices 2008-05-20 18:24:17 +02:00
firmware
gpio gpio: pca953x: add support for pca9555 I2C I/O expander 2008-05-01 08:04:01 -07:00
hid HID: remove CVS keywords 2008-05-20 16:44:43 +02:00
hwmon Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6 2008-05-01 08:28:26 -07:00
i2c i2c/max6875: Really prevent 24RF08 corruption 2008-05-18 20:49:41 +02:00
ide ide: fix race in device_create 2008-05-20 13:31:54 -07:00
ieee1394 ieee1394: sbp2: use correct size of command descriptor block 2008-05-20 18:24:17 +02:00
infiniband IB: fix race in device_create 2008-05-20 13:31:55 -07:00
input xen pvfb: Dynamic mode support (screen resizing) 2008-05-27 10:11:36 +02:00
isdn isdn/capi: Return proper errnos on module init. 2008-05-14 23:30:06 -07:00
leds LEDS: fix race in device_create 2008-05-20 13:31:55 -07:00
lguest x86/paravirt: add pte_flags to just get pte flags 2008-05-27 10:11:36 +02:00
macintosh [POWERPC] macintosh: Replace deprecated __initcall with device_initcall 2008-05-15 20:50:00 +10:00
mca
md Remove blkdev warning triggered by using md 2008-05-14 19:11:15 -07:00
media missing dependencies on HAS_DMA 2008-05-21 16:55:59 -07:00
memstick
message
mfd HTC_EGPIO is ARM-only 2008-05-21 16:56:00 -07:00
misc drivers/misc/sgi-xp: replace partid_t with a short 2008-05-13 08:02:23 -07:00
mmc missing dependencies on HAS_DMA 2008-05-21 16:55:59 -07:00
mtd mtd: solutionengine flash map depends on solution engine mach group. 2008-05-08 19:51:40 +09:00
net missing dependencies on HAS_DMA 2008-05-21 16:55:59 -07:00
nubus
of [POWERPC] Add null pointer check to of_find_property 2008-05-15 20:49:49 +10:00
oprofile oprofile: don't request cache line alignment for cpu_buffer 2008-05-14 19:11:12 -07:00
parisc drivers/parisc: replace remaining __FUNCTION__ occurrences 2008-05-15 10:38:54 -04:00
parport debugobjects: add timer specific object debugging code 2008-04-30 08:29:53 -07:00
pci Clean up 'print_fn_descriptor_symbol()' types 2008-05-15 17:50:37 -07:00
pcmcia pcmcia: replace remaining __FUNCTION__ occurrences 2008-05-01 08:04:00 -07:00
pnp Clean up 'print_fn_descriptor_symbol()' types 2008-05-15 17:50:37 -07:00
power Power Supply: fix race in device_create 2008-05-20 13:31:55 -07:00
ps3 [POWERPC] PS3: Remove unsupported wakeup sources 2008-05-02 15:00:44 +10:00
rapidio
rtc rtc: m41t80: include <linux/kernel.h> for printk() 2008-05-13 08:02:26 -07:00
s390 s390: fix race in device_create 2008-05-20 13:31:56 -07:00
sbus sbus bpp: instances missed in s/dev_name/bpp_dev_name/ 2008-05-21 16:55:59 -07:00
scsi MODULE_LICENSE expects "GPL v2", not "GPLv2" 2008-05-21 16:56:00 -07:00
serial Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 2008-05-19 16:33:29 -07:00
sh
sn
spi mpc5200_psc_spi: typo fix in header block 2008-05-14 19:11:12 -07:00
ssb
tc
telephony
thermal
uio UIO: fix race in device_create 2008-05-20 13:31:55 -07:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 2008-05-20 17:20:49 -07:00
video xen pvfb: Dynamic mode support (screen resizing) 2008-05-27 10:11:36 +02:00
virtio virtio: explicit advertisement of driver features 2008-05-02 21:50:50 +10:00
w1 drivers: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:53 -07:00
watchdog
xen xen: implement save/restore 2008-05-27 10:11:38 +02:00
zorro
Kconfig Basic braille screen reader support 2008-04-30 08:29:52 -07:00
Makefile Basic braille screen reader support 2008-04-30 08:29:52 -07:00