From ed7f3ab5817cff246e973bd0f784d5d9f2f77e06 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <michael@ellerman.id.au>
Date: Sat, 12 Nov 2005 00:06:05 +1100
Subject: [PATCH] --- yaml --- r: 14160 b: refs/heads/master c:
 c5e24354efae9f962e0e369d875d45f47e0bb9aa h: refs/heads/master v: v3

---
 [refs]                                       |  2 +-
 trunk/arch/powerpc/platforms/pseries/setup.c | 26 ++++++++++++++++++--
 trunk/arch/ppc64/kernel/machine_kexec.c      | 12 ++++-----
 trunk/include/asm-powerpc/machdep.h          |  4 ++-
 4 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/[refs] b/[refs]
index 761a43800edf..a806c8c0d7e9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5cd16ee934eafca74a6bb790328950cec68a8b78
+refs/heads/master: c5e24354efae9f962e0e369d875d45f47e0bb9aa
diff --git a/trunk/arch/powerpc/platforms/pseries/setup.c b/trunk/arch/powerpc/platforms/pseries/setup.c
index 31990829310c..b9d9732b2e06 100644
--- a/trunk/arch/powerpc/platforms/pseries/setup.c
+++ b/trunk/arch/powerpc/platforms/pseries/setup.c
@@ -200,14 +200,12 @@ static void __init pSeries_setup_arch(void)
 	if (ppc64_interrupt_controller == IC_OPEN_PIC) {
 		ppc_md.init_IRQ       = pSeries_init_mpic;
 		ppc_md.get_irq        = mpic_get_irq;
-	 	ppc_md.cpu_irq_down   = mpic_teardown_this_cpu;
 		/* Allocate the mpic now, so that find_and_init_phbs() can
 		 * fill the ISUs */
 		pSeries_setup_mpic();
 	} else {
 		ppc_md.init_IRQ       = xics_init_IRQ;
 		ppc_md.get_irq        = xics_get_irq;
-		ppc_md.cpu_irq_down   = xics_teardown_cpu;
 	}
 
 #ifdef CONFIG_SMP
@@ -595,6 +593,27 @@ static int pSeries_pci_probe_mode(struct pci_bus *bus)
 	return PCI_PROBE_NORMAL;
 }
 
+#ifdef CONFIG_KEXEC
+static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
+{
+	/* Don't risk a hypervisor call if we're crashing */
+	if (!crash_shutdown) {
+		unsigned long vpa = __pa(&get_paca()->lppaca);
+
+		if (unregister_vpa(hard_smp_processor_id(), vpa)) {
+			printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
+					"failed\n", smp_processor_id(),
+					hard_smp_processor_id());
+		}
+	}
+
+	if (ppc64_interrupt_controller == IC_OPEN_PIC)
+		mpic_teardown_this_cpu(secondary);
+	else
+		xics_teardown_cpu(secondary);
+}
+#endif
+
 struct machdep_calls __initdata pSeries_md = {
 	.probe			= pSeries_probe,
 	.setup_arch		= pSeries_setup_arch,
@@ -617,4 +636,7 @@ struct machdep_calls __initdata pSeries_md = {
 	.check_legacy_ioport	= pSeries_check_legacy_ioport,
 	.system_reset_exception = pSeries_system_reset_exception,
 	.machine_check_exception = pSeries_machine_check_exception,
+#ifdef CONFIG_KEXEC
+	.kexec_cpu_down		= pseries_kexec_cpu_down,
+#endif
 };
diff --git a/trunk/arch/ppc64/kernel/machine_kexec.c b/trunk/arch/ppc64/kernel/machine_kexec.c
index 07ea03598c00..203f1d5e6f10 100644
--- a/trunk/arch/ppc64/kernel/machine_kexec.c
+++ b/trunk/arch/ppc64/kernel/machine_kexec.c
@@ -185,8 +185,8 @@ void kexec_copy_flush(struct kimage *image)
  */
 void kexec_smp_down(void *arg)
 {
-	if (ppc_md.cpu_irq_down)
-		ppc_md.cpu_irq_down(1);
+	if (ppc_md.kexec_cpu_down)
+		ppc_md.kexec_cpu_down(0, 1);
 
 	local_irq_disable();
 	kexec_smp_wait();
@@ -233,8 +233,8 @@ static void kexec_prepare_cpus(void)
 	}
 
 	/* after we tell the others to go down */
-	if (ppc_md.cpu_irq_down)
-		ppc_md.cpu_irq_down(0);
+	if (ppc_md.kexec_cpu_down)
+		ppc_md.kexec_cpu_down(0, 0);
 
 	put_cpu();
 
@@ -255,8 +255,8 @@ static void kexec_prepare_cpus(void)
 	 * UP to an SMP kernel.
 	 */
 	smp_release_cpus();
-	if (ppc_md.cpu_irq_down)
-		ppc_md.cpu_irq_down(0);
+	if (ppc_md.kexec_cpu_down)
+		ppc_md.kexec_cpu_down(0, 0);
 	local_irq_disable();
 }
 
diff --git a/trunk/include/asm-powerpc/machdep.h b/trunk/include/asm-powerpc/machdep.h
index 5670f0cd6143..c011abb8b600 100644
--- a/trunk/include/asm-powerpc/machdep.h
+++ b/trunk/include/asm-powerpc/machdep.h
@@ -93,7 +93,9 @@ struct machdep_calls {
 
 	void		(*init_IRQ)(void);
 	int		(*get_irq)(struct pt_regs *);
-	void		(*cpu_irq_down)(int secondary);
+#ifdef CONFIG_KEXEC
+	void		(*kexec_cpu_down)(int crash_shutdown, int secondary);
+#endif
 
 	/* PCI stuff */
 	/* Called after scanning the bus, before allocating resources */