[Xen-changelog] [xen-unstable] restore: sign extend p2m when restoring on a host with pfn width <

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1239214233 -3600
# Node ID a6003404e95b77d28a9dbc1550c34e9c6ba5e871
# Parent  f9c8c6b0897274ffb682b259b794dde07cb2d8a5
restore: sign extend p2m when restoring on a host with pfn width <
guest pfn width

(i.e. 32on64 domain 0 and 64 bit guest domain).

Otherwise P2M entries which were INVALID_P2M_ENTRY
(==0xffffffffffffffff) become 0xffffffff after a migrate.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 tools/libxc/xc_domain_restore.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r f9c8c6b08972 -r a6003404e95b tools/libxc/xc_domain_restore.c
--- a/tools/libxc/xc_domain_restore.c   Wed Apr 08 14:43:12 2009 +0100
+++ b/tools/libxc/xc_domain_restore.c   Wed Apr 08 19:10:33 2009 +0100
@@ -1197,7 +1197,7 @@ int xc_domain_restore(int xc_handle, int
      * we need to adjust the live_p2m assignment appropriately */
     if ( guest_width > sizeof (xen_pfn_t) )
         for ( i = p2m_size - 1; i >= 0; i-- )
-            ((uint64_t *)live_p2m)[i] = p2m[i];
+            ((int64_t *)live_p2m)[i] = (long)p2m[i];
     else if ( guest_width < sizeof (xen_pfn_t) )
         for ( i = 0; i < p2m_size; i++ )   
             ((uint32_t *)live_p2m)[i] = p2m[i];

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