[IA64] IA64 Kexec/kdump

Changes and updates.

1. Remove fake rendz path and related code according to discuss with Khalid Aziz.
2. fc.i offset fix in relocate_kernel.S.
3. iospic shutdown code eoi and mask race fix from Fujitsu.
4. Warm boot hook in machine_kexec to SN SAL code from Jack Steiner.
5. Send slave to SAL slave loop patch from Jay Lan.
6. Kdump on non-recoverable MCA event patch from Jay Lan
7. Use CTL_UNNUMBERED in kdump_on_init sysctl.

Signed-off-by: Zou Nan hai <nanhai.zou@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 27 insertions, 1 deletions

diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 6ab95ceaf9d4..b1b9aa4364b9 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -30,6 +30,7 @@
 #include <linux/delay.h>
 #include <linux/efi.h>
 #include <linux/bitops.h>
+#include <linux/kexec.h>
 
 #include <asm/atomic.h>
 #include <asm/current.h>
@@ -66,6 +67,7 @@ static volatile struct call_data_struct *call_data;
 
 #define IPI_CALL_FUNC           0
 #define IPI_CPU_STOP            1
+#define IPI_KDUMP_CPU_STOP      3
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;
@@ -155,7 +157,11 @@ handle_IPI (int irq, void *dev_id)
                               case IPI_CPU_STOP:
                                 stop_this_cpu();
                                 break;
-
+#ifdef CONFIG_CRASH_DUMP
+                              case IPI_KDUMP_CPU_STOP:
+                                unw_init_running(kdump_cpu_freeze, NULL);
+                                break;
+#endif
                               default:
                                 printk(KERN_CRIT "Unknown IPI on CPU %d: %lu\n", this_cpu, which);
                                 break;
@@ -213,6 +219,26 @@ send_IPI_self (int op)
         send_IPI_single(smp_processor_id(), op);
 }
 
+#ifdef CONFIG_CRASH_DUMP
+void
+kdump_smp_send_stop()
+{
+        send_IPI_allbutself(IPI_KDUMP_CPU_STOP);
+}
+
+void
+kdump_smp_send_init()
+{
+        unsigned int cpu, self_cpu;
+        self_cpu = smp_processor_id();
+        for_each_online_cpu(cpu) {
+                if (cpu != self_cpu) {
+                        if(kdump_status[cpu] == 0)
+                                platform_send_ipi(cpu, 0, IA64_IPI_DM_INIT, 0);
+                }
+        }
+}
+#endif
 /*
  * Called with preeemption disabled.
  */