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path: root/drivers/xen/manage.c
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* xen: don't reload cr3 on suspendJeremy Fitzhardinge2008-10-231-2/+0
| | | | | | | | It isn't necessary, and it makes the code needlessly non-portable. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* stop_machine: wean Xen off stop_machine_runRusty Russell2008-08-261-1/+1
| | | | | | | This is the last use of (the deprecated) stop_machine_run in the tree. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* linux-next: pci tree build failureStephen Rothwell2008-07-181-2/+2
| | | | | | | | | | | | | | | | | | | Today's linux-next build (x86_64 allmodconfig) failed like this: drivers/xen/manage.c: In function 'xen_suspend': drivers/xen/manage.c:66: error: too few arguments to function 'device_power_up' drivers/xen/manage.c: In function 'do_suspend': drivers/xen/manage.c:117: error: too few arguments to function 'device_resume' Caused by commit 1eede070a59e1cc73da51e1aaa00d9ab86572cfc ("Introduce new top level suspend and hibernation callbacks") interacting with new usages ... Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* xen: add xen_arch_resume()/xen_timer_resume hook for ia64 supportIsaku Yamahata2008-07-161-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | add xen_timer_resume() hook. Timer resume should be done after event channel is resumed. add xen_arch_resume() hook when ipi becomes usable after resume. After resume, some cpu specific resource must be reinitialized on ia64 that can't be set by another cpu. However available hooks is run once on only one cpu so that ipi has to be used. During stop_machine_run() ipi can't be used because interrupt is masked. So add another hook after stop_machine_run(). Another approach might be use resume hook which is run by device_resume(). However device_resume() may be executed on suspend error recovery path. So it is necessary to determine whether it is executed on real resume path or error recovery path. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* CONFIG_PM_SLEEP fix: xen: fix compilation when CONFIG_PM_SLEEP is disabledJeremy Fitzhardinge2008-06-021-0/+2
| | | | | | | | Xen save/restore depends on CONFIG_PM_SLEEP being set for device_power_up/down. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* xen: maintain clock offset over save/restoreJeremy Fitzhardinge2008-05-271-3/+12
| | | | | | | | | | Hook into the device model to make sure that timekeeping's resume handler is called. This deals with our clocksource's non-monotonicity over the save/restore. Explicitly call clock_has_changed() to make sure that all the timers get retriggered properly. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* xen: implement save/restoreJeremy Fitzhardinge2008-05-271-14/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* xen: Move manage.c to drivers/xen for ia64/xen supportIsaku Yamahata2008-05-271-0/+143
move arch/x86/xen/manage.c under drivers/xen/to share codes with x86 and ia64. ia64/xen also uses manage.c Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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