[Xense-devel] [PATCH] txt: 1/6 - "fix" xen_phys_start for 32b builds

["Cihula, Joseph" <joseph.cihula@xxxxxxxxx>]

On IA32 (32b/32b PAE) builds, set xen_phys_start (and by extension 
xenheap_phys_start) to be the start of hypervisor code (instead of 0).  This 
reflects the actual trust/protection boundary of the hypervisor.

Signed-off-by: Joseph Cihula <joseph.cihula@xxxxxxxxx>

diff -r 8df3c145923f -r f96073a97f5c xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c      Mon Jan 19 17:40:28 2009 +0000
+++ b/xen/arch/x86/setup.c      Mon Jan 19 20:22:24 2009 -0800
@@ -843,7 +843,7 @@ void __init __start_xen(unsigned long mb
     /* Initialise the Xen heap. */
     init_xenheap_pages(xenheap_phys_start, xenheap_phys_end);
     nr_pages = (xenheap_phys_end - xenheap_phys_start) >> PAGE_SHIFT;
-    xenheap_phys_start = xen_phys_start;
+    xenheap_phys_start = xen_phys_start = __pa(&_start);
     printk("Xen heap: %luMB (%lukB)\n",
            nr_pages >> (20 - PAGE_SHIFT),
            nr_pages << (PAGE_SHIFT - 10));

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