[RFC][PATCH] allow dom0 to power off machine using ACPI on shutdown.

[Harry Butterworth <harry@hebutterworth.freeserve.co.uk>]

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This is an evil little patch which allows my dom0 to power off the
machine on shutdown successfully and doesn't break my domU shutdown
behaviour.

The #if bits are ugly and are present because pm_power_off is declared
above in the same #if context, maybe they are not necessary.  I'm not
sure about the solution for ia64.

This powers down the machine without bothering to tell the hypervisor.

I thought this kind of solution was better than trying to import a lot
more ACPI cruft into Xen.  Any thoughts?

Harry.

Signed-off-by: Harry Butterworth <butterwo@uk.ibm.com>

# HG changeset patch
# User harry@localhost.localdomain
# Node ID 5c85b5dd3f8eda21cbcf529941dc41c72a7c6e09
# Parent  67de34c062b5897d1e82995b171be081f976558e
Allow a domain to call native pm_power_off if present. Fixes dom0
failure to power off on shutdown.

diff -r 67de34c062b5 -r 5c85b5dd3f8e
linux-2.6-xen-sparse/drivers/xen/core/reboot.c
--- a/linux-2.6-xen-sparse/drivers/xen/core/reboot.c	Thu Apr  6 11:03:53
2006
+++ b/linux-2.6-xen-sparse/drivers/xen/core/reboot.c	Thu Apr  6 18:25:23
2006
@@ -59,6 +59,10 @@
 {
 	/* We really want to get pending console data out before we die. */
 	xencons_force_flush();
+#if defined(__i386__) || defined(__x86_64__)
+	if (pm_power_off)
+		pm_power_off();
+#endif
 	HYPERVISOR_shutdown(SHUTDOWN_poweroff);
 }
 


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# HG changeset patch
# User harry@localhost.localdomain
# Node ID 5c85b5dd3f8eda21cbcf529941dc41c72a7c6e09
# Parent  67de34c062b5897d1e82995b171be081f976558e
Allow a domain to call native pm_power_off if present. Fixes dom0 failure to power off on shutdown.

diff -r 67de34c062b5 -r 5c85b5dd3f8e linux-2.6-xen-sparse/drivers/xen/core/reboot.c
--- a/linux-2.6-xen-sparse/drivers/xen/core/reboot.c	Thu Apr  6 11:03:53 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/core/reboot.c	Thu Apr  6 18:25:23 2006
@@ -59,6 +59,10 @@
 {
 	/* We really want to get pending console data out before we die. */
 	xencons_force_flush();
+#if defined(__i386__) || defined(__x86_64__)
+	if (pm_power_off)
+		pm_power_off();
+#endif
 	HYPERVISOR_shutdown(SHUTDOWN_poweroff);
 }
 

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