[Xen-ia64-devel] [rfc 05/15] Kdump: Save dom0_mm_pgd_mfn in vmcore on ia64

[Simon Horman <horms@xxxxxxxxxxxx>]

On Xen dom0_mm_pgd_mfn needs to be saved in the vmcore in
order to allow the crash utility to navigate the vmcore file.

Cc: Itsuro ODA <oda@xxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>

Index: xen-ia64-unstable-14854.hg/xen/include/xen/elfcore.h
===================================================================
--- xen-ia64-unstable-14854.hg.orig/xen/include/xen/elfcore.h   2007-04-24 
13:22:55.000000000 +0900
+++ xen-ia64-unstable-14854.hg/xen/include/xen/elfcore.h        2007-04-24 
13:23:03.000000000 +0900
@@ -65,9 +65,12 @@ typedef struct {
     unsigned long xen_compile_date;
     unsigned long xen_compile_time;
     unsigned long tainted;
-#ifdef CONFIG_X86
+#if defined(__i386__) || defined(__x86_64__)
     unsigned long dom0_pfn_to_mfn_frame_list_list;
 #endif
+#if defined(__ia64__)
+    unsigned long dom0_mm_pgd_mfn;
+#endif
 } crash_xen_info_t;
 
 #endif /* __ELFCOREC_H__ */
Index: xen-ia64-unstable-14854.hg/xen/arch/ia64/xen/crash.c
===================================================================
--- xen-ia64-unstable-14854.hg.orig/xen/arch/ia64/xen/crash.c   2007-04-24 
13:22:55.000000000 +0900
+++ xen-ia64-unstable-14854.hg/xen/arch/ia64/xen/crash.c        2007-04-24 
14:46:59.000000000 +0900
@@ -15,16 +15,21 @@
 #include <linux/hardirq.h>
 #include <linux/smp.h>
 #include <asm/processor.h>
+#include <xen/sched.h>
 
 void machine_crash_shutdown(void)
 {
-    //printk("machine_crash_shutdown: %d\n", smp_processor_id());
+    crash_xen_info_t *info;
+    unsigned long dom0_mm_pgd_mfn;
+
     if (in_interrupt())
         ia64_eoi();
     kexec_crash_save_info();
-    printk(__FILE__ ": %s: save the eqivalent of x86's "
-           "dom0->shared_info->arch.pfn_to_mfn_frame_list_list?\n",
-           __FUNCTION__);
+    info = kexec_crash_save_info();
+    /* Info is not word aligned on ia64 */
+    dom0_mm_pgd_mfn = __pa(dom0->arch.mm.pgd) >> PAGE_SHIFT;
+    memcpy((char *)info + offsetof(crash_xen_info_t, dom0_mm_pgd_mfn),
+          &dom0_mm_pgd_mfn, sizeof(dom0_mm_pgd_mfn));
 #ifdef CONFIG_SMP
     smp_send_stop();
 #endif

-- 

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


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