[Xen-devel] [PATCH] x86: fix l1_disallow_mask()

[NISHIGUCHI Naoki <nisiguti@xxxxxxxxxxxxxx>]

Hi,

When it is shutting down a Windows XP guest that has been passed through
HD Audio Controller of ICH9 by VT-d, there is a problem that the
following message is repeated many times in hypervisor's log and the
shutdown's process does not end.

  (XEN) mm.c:661:d1 Bad L1 flags 10

Attached patch fixes this problem.


Signed-off-by: Naoki Nishiguchi <nisiguti@xxxxxxxxxxxxxx>

Regards,
Naoki Nishiguchi

diff -r 8b1ebe5e8fd7 xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c Mon Aug 11 16:51:02 2008 +0100
+++ b/xen/arch/x86/mm.c Tue Aug 12 09:48:55 2008 +0900
@@ -163,7 +163,8 @@
 #define l1_disallow_mask(d)                                     \
     ((d != dom_io) &&                                           \
      (rangeset_is_empty((d)->iomem_caps) &&                     \
-      rangeset_is_empty((d)->arch.ioport_caps)) ?               \
+      rangeset_is_empty((d)->arch.ioport_caps)) &&              \
+     !has_arch_pdevs(d) ?                                       \
      L1_DISALLOW_MASK : (L1_DISALLOW_MASK & ~PAGE_CACHE_ATTRS))
 
 #ifdef CONFIG_COMPAT

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