Don't panic for (rare) dom0 physaddr with uncacheable attribute

diff --git a/xen/arch/ia64/xen/vcpu.c b/xen/arch/ia64/xen/vcpu.c
index 69fa08447dc03118135b828f61b28efa4c099ac6..4e80bc16a1caf7503837abe28a2b0157b203a195 100644 (file)
--- a/xen/arch/ia64/xen/vcpu.c
+++ b/xen/arch/ia64/xen/vcpu.c
@@ -1296,9 +1296,12 @@ IA64FAULT vcpu_translate(VCPU *vcpu, UINT64 address, BOOLEAN is_data, UINT64 *pt
        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++;