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-rw-r--r--arch/x86/xen/setup.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index be1a464..60aeeb5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -227,11 +227,7 @@ char * __init xen_memory_setup(void)
memcpy(map_raw, map, sizeof(map));
e820.nr_map = 0;
-#ifdef CONFIG_X86_32
xen_extra_mem_start = mem_end;
-#else
- xen_extra_mem_start = max((1ULL << 32), mem_end);
-#endif
for (i = 0; i < memmap.nr_entries; i++) {
unsigned long long end;
@@ -266,6 +262,12 @@ char * __init xen_memory_setup(void)
if (map[i].size > 0)
e820_add_region(map[i].addr, map[i].size, map[i].type);
}
+ /* Align the balloon area so that max_low_pfn does not get set
+ * to be at the _end_ of the PCI gap at the far end (fee01000).
+ * Note that xen_extra_mem_start gets set in the loop above to be
+ * past the last E820 region. */
+ if (xen_initial_domain() && (xen_extra_mem_start < (1ULL<<32)))
+ xen_extra_mem_start = (1ULL<<32);
/*
* In domU, the ISA region is normal, usable memory, but we
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