Merge branch 'upstream-fixes'

[powerpc.git] / arch / powerpc / kernel / traps.c

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 1511454..7509aa6 100644 (file)
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -31,6 +31,7 @@
 #include <linux/prctl.h>
 #include <linux/delay.h>
 #include <linux/kprobes.h>
+#include <linux/kexec.h>
 
 #include <asm/kdebug.h>
 #include <asm/pgtable.h>
@@ -95,7 +96,7 @@ static DEFINE_SPINLOCK(die_lock);
 
 int die(const char *str, struct pt_regs *regs, long err)
 {
-       static int die_counter;
+       static int die_counter, crash_dump_start = 0;
        int nl = 0;
 
        if (debugger(regs))
@@ -156,7 +157,21 @@ int die(const char *str, struct pt_regs *regs, long err)
        print_modules();
        show_regs(regs);
        bust_spinlocks(0);
+
+       if (!crash_dump_start && kexec_should_crash(current)) {
+               crash_dump_start = 1;
+               spin_unlock_irq(&die_lock);
+               crash_kexec(regs);
+               /* NOTREACHED */
+       }
        spin_unlock_irq(&die_lock);
+       if (crash_dump_start)
+               /*
+                * Only for soft-reset: Other CPUs will be responded to an IPI
+                * sent by first kexec CPU.
+                */
+               for(;;)
+                       ;
 
        if (in_interrupt())
                panic("Fatal exception in interrupt");
@@ -215,8 +230,10 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 void system_reset_exception(struct pt_regs *regs)
 {
        /* See if any machine dependent calls */
-       if (ppc_md.system_reset_exception)
-               ppc_md.system_reset_exception(regs);
+       if (ppc_md.system_reset_exception) {
+               if (ppc_md.system_reset_exception(regs))
+                       return;
+       }
 
        die("System Reset", regs, SIGABRT);
 
@@ -886,12 +903,10 @@ void altivec_unavailable_exception(struct pt_regs *regs)
        die("Unrecoverable VMX/Altivec Unavailable Exception", regs, SIGABRT);
 }
 
-#if defined(CONFIG_PPC64) || defined(CONFIG_E500)
 void performance_monitor_exception(struct pt_regs *regs)
 {
        perf_irq(regs);
 }
-#endif
 
 #ifdef CONFIG_8xx
 void SoftwareEmulation(struct pt_regs *regs)