[Xen-changelog] Don't panic for (rare) dom0 physaddr with uncacheable attribute

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

# HG changeset patch
# User djm@xxxxxxxxxxxxxxx
# Node ID 7fd6dff1631d662c53b7a11c55ef7b07ac50e156
# Parent  8ddc812626b24eb327613b61e5251181eb93b98f
Don't panic for (rare) dom0 physaddr with uncacheable attribute

diff -r 8ddc812626b2 -r 7fd6dff1631d xen/arch/ia64/xen/vcpu.c
--- a/xen/arch/ia64/xen/vcpu.c  Wed Nov  9 18:59:28 2005
+++ b/xen/arch/ia64/xen/vcpu.c  Wed Nov  9 20:11:31 2005
@@ -1296,9 +1296,12 @@
        TR_ENTRY *trp;
 
        if (PSCB(vcpu,metaphysical_mode)) {
-               if (address >> 61)      // FIXME: need more precise check here
+               unsigned long region = address >> 61;
+               // dom0 may generate an uncacheable physical address (msb=1)
+               if (region && ((region != 4) || (vcpu->domain != dom0))) {
                        panic_domain(vcpu_regs(vcpu),
-                               "vcpu_translate: bad physical address\n");
+                        "vcpu_translate: bad physical address: %p\n",address);
+               }
                *pteval = (address & _PAGE_PPN_MASK) | __DIRTY_BITS | 
_PAGE_PL_2 | _PAGE_AR_RWX;
                *itir = PAGE_SHIFT << 2;
                phys_translate_count++;

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