From 8006ec3e911f93d702e1d4a4e387e244ab434924 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Mon, 26 May 2008 23:31:19 +0100
Subject: xen: add configurable max domain size

Add a config option to set the max size of a Xen domain.  This is used
to scale the size of the physical-to-machine array; it ends up using
around 1 page/GByte, so there's no reason to be very restrictive.

For a 32-bit guest, the default value of 8GB is probably sufficient;
there's not much point in giving a 32-bit machine much more memory
than that.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/xen/setup.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'arch/x86/xen/setup.c')

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 37f8f0b..4884478 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -16,6 +16,7 @@
 #include <asm/xen/hypervisor.h>
 #include <asm/xen/hypercall.h>
 
+#include <xen/page.h>
 #include <xen/interface/callback.h>
 #include <xen/interface/physdev.h>
 #include <xen/features.h>
@@ -36,6 +37,8 @@ char * __init xen_memory_setup(void)
 {
 	unsigned long max_pfn = xen_start_info->nr_pages;
 
+	max_pfn = min(MAX_DOMAIN_PAGES, max_pfn);
+
 	e820.nr_map = 0;
 	add_memory_region(0, LOWMEMSIZE(), E820_RAM);
 	add_memory_region(HIGH_MEMORY, PFN_PHYS(max_pfn)-HIGH_MEMORY, E820_RAM);
-- 
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