From 992fd9b0ee46b3818c345ba8ed1e92f4a6b1c868 Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@hp.com>
Date: Thu, 27 Sep 2007 16:26:34 -0600
Subject: [PATCH] [IA64] Kexec: Zap VHPT in relocate_kernel

On XEN do_ia64_purge_tlb unpins the VHPT entry, so it seems
logical that relocate_kernel should do the same thing.
It seems to work, but is it correct?

Signed-off-by: Simon Horman <horms@verge.net.au>
---
 xen/arch/ia64/xen/machine_kexec.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/xen/arch/ia64/xen/machine_kexec.c b/xen/arch/ia64/xen/machine_kexec.c
index c4f11ce8f9..666dbc967a 100644
--- a/xen/arch/ia64/xen/machine_kexec.c
+++ b/xen/arch/ia64/xen/machine_kexec.c
@@ -12,12 +12,14 @@
 #include <xen/lib.h>
 #include <xen/types.h>
 #include <xen/smp.h>
+#include <xen/acpi.h>
 #include <public/kexec.h>
 #include <linux/efi.h>
 #include <asm/delay.h>
 #include <asm/meminit.h>
 #include <asm/hw_irq.h>
 #include <asm/kexec.h>
+#include <asm/vhpt.h>
 #include <linux/cpu.h>
 #include <linux/cpu.h>
 #include <linux/notifier.h>
@@ -29,7 +31,8 @@ typedef asmlinkage NORET_TYPE void (*relocate_new_kernel_t)(
 					unsigned long pal_addr,
 					unsigned long cpu_data_pa,
 					unsigned long kernel_start,
-					unsigned long page_offset)
+					unsigned long page_offset,
+					unsigned long vhpt)
 					ATTRIB_NORET;
 
 #define kexec_flush_icache_page(page)					\
@@ -55,6 +58,7 @@ static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
 				  __va(image->reboot_code_buffer);
 	unsigned long cpu_data_pa = (unsigned long)
 				  __pa(cpu_data(smp_processor_id()));
+	unsigned long vhpt;
 	int ii;
 
 	/* Interrupts aren't acceptable while we reboot */
@@ -79,10 +83,12 @@ static void ia64_machine_kexec(struct unw_frame_info *info, void *arg)
 	while (ia64_get_ivr() != IA64_SPURIOUS_INT_VECTOR)
 		ia64_eoi();
 	platform_kernel_launch_event();
+	vhpt = __va_ul(vcpu_vhpt_maddr(current));
+	BUG_ON(!vhpt);
 	rnk = (relocate_new_kernel_t)&code_addr;
 	(*rnk)(image->indirection_page, image->start_address, ia64_boot_param,
 	       GRANULEROUNDDOWN((unsigned long) pal_vaddr), cpu_data_pa,
-	       KERNEL_START, PAGE_OFFSET);
+	       KERNEL_START, PAGE_OFFSET, vhpt);
 	BUG();
 }
 
-- 
2.30.2