From: awilliam@xenbuild.aw <awilliam@xenbuild.aw>
Date: Mon, 24 Jul 2006 20:26:03 +0000 (-0600)
Subject: [IA64] Support domU coredump on ia64
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~15786^2~18
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=9d20d1268d20d5fad545586ecde59516339d66d1;p=xen.git

[IA64] Support domU coredump on ia64

This patch supports domU coredump on ia64.  xen_panic_event() is
registered to panic_notifier_list, and xen_panic_event() calls
HYPERVISOR_shutdown(SHUTDOWN_crash) at panic time.

If xend is notified of crash status, xend calls dumpCore()
and create domU's core in /var/xen/dump.

For sample crash module and usage, see:

http://lists.xensource.com/archives/html/xen-ia64-devel/2006-07/msg00230.html

Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com>
[minor code re-arrangement]
Signed-off-by: Alex Williamson <alex.williamson@hp.com>
---

diff --git a/linux-2.6-xen-sparse/arch/ia64/kernel/setup.c b/linux-2.6-xen-sparse/arch/ia64/kernel/setup.c
index 463188ce09..12ab159f0d 100644
--- a/linux-2.6-xen-sparse/arch/ia64/kernel/setup.c
+++ b/linux-2.6-xen-sparse/arch/ia64/kernel/setup.c
@@ -75,6 +75,20 @@ unsigned long __per_cpu_offset[NR_CPUS];
 EXPORT_SYMBOL(__per_cpu_offset);
 #endif
 
+#ifdef CONFIG_XEN
+static int
+xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+	HYPERVISOR_shutdown(SHUTDOWN_crash);
+	/* we're never actually going to get here... */
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block xen_panic_block = {
+	xen_panic_event, NULL, 0 /* try to go last */
+};
+#endif
+
 extern void ia64_setup_printk_clock(void);
 
 DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
@@ -418,8 +432,11 @@ setup_arch (char **cmdline_p)
 	unw_init();
 
 #ifdef CONFIG_XEN
-	if (is_running_on_xen())
+	if (is_running_on_xen()) {
 		setup_xen_features();
+		/* Register a call for panic conditions. */
+		notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+	}
 #endif
 
 	ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);