[Xen-ia64-devel] [patch 07/12] Kexec: Zap VHPT in relocate_kernel

[Simon Horman <horms@xxxxxxxxxxxx>]

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?

There is a companion hypervisor portion of this patch

Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>

Index: xen-unstable.hg/xen/arch/ia64/xen/machine_kexec.c
===================================================================
--- xen-unstable.hg.orig/xen/arch/ia64/xen/machine_kexec.c      2007-08-16 
17:17:01.000000000 +0900
+++ xen-unstable.hg/xen/arch/ia64/xen/machine_kexec.c   2007-08-16 
17:17:07.000000000 +0900
@@ -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 (*rel
                                        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 un
                                  __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 */
@@ -82,10 +86,12 @@ static void ia64_machine_kexec(struct un
        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();
 }
 

-- 

-- 
Horms
  H: http://www.vergenet.net/~horms/
  W: http://www.valinux.co.jp/en/


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