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x86/xen: fix DomU boot problem

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Construct Xen guest e820 map with a hole between 640K-1M.

It's pure luck that Xen kernels have gotten away with it in the past.

The patch below seems like the right thing to do. It certainly boots in
a domU without the DMI problem (without any of the other related patches
such as Alexander's).

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Tested-by: Mark McLoughlin <markmc@redhat.com>
Acked-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ian Campbell 2008-02-28 23:16:49 +00:00 committed by Ingo Molnar
parent 7c9e92b6cd
commit 87d034f313
1 changed files with 2 additions and 1 deletions
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3
arch/x86/xen/setup.c
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@ -38,7 +38,8 @@ char * __init xen_memory_setup(void)
unsigned long max_pfn = xen_start_info->nr_pages;
e820.nr_map = 0;
add_memory_region(0, PFN_PHYS(max_pfn), E820_RAM);
add_memory_region(0, LOWMEMSIZE(), E820_RAM);
add_memory_region(HIGH_MEMORY, PFN_PHYS(max_pfn)-HIGH_MEMORY, E820_RAM);
return "Xen";
}