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authorAlex Nixon <alex.nixon@citrix.com>2008-08-22 06:52:15 -0400
committerIngo Molnar <mingo@elte.hu>2008-08-25 05:25:14 -0400
commitd68d82afd4c88e25763b23cd9cd4974573a3706f (patch)
tree42a3fb93a5cef70db7ad01fda1ed0dc68dbe6110 /arch/x86/xen/time.c
parent8227dce7dc2cfdcc28ee0eadfb482a7ee77fba03 (diff)
xen: implement CPU hotplugging
Note the changes from 2.6.18-xen CPU hotplugging: A vcpu_down request from the remote admin via Xenbus both hotunplugs the CPU, and disables it by removing it from the cpu_present map, and removing its entry in /sys. A vcpu_up request from the remote admin only re-enables the CPU, and does not immediately bring the CPU up. A udev event is emitted, which can be caught by the user if he wishes to automatically re-up CPUs when available, or implement a more complex policy. Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/xen/time.c')
-rw-r--r--arch/x86/xen/time.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 20182d9072c4..004ba86326ae 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -450,6 +450,14 @@ void xen_setup_timer(int cpu)
450 setup_runstate_info(cpu); 450 setup_runstate_info(cpu);
451} 451}
452 452
453void xen_teardown_timer(int cpu)
454{
455 struct clock_event_device *evt;
456 BUG_ON(cpu == 0);
457 evt = &per_cpu(xen_clock_events, cpu);
458 unbind_from_irqhandler(evt->irq, NULL);
459}
460
453void xen_setup_cpu_clockevents(void) 461void xen_setup_cpu_clockevents(void)
454{ 462{
455 BUG_ON(preemptible()); 463 BUG_ON(preemptible());