linux-kernel - [PATCH 3/3] xen: set max_pfn

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Message-ID: <4856E12B.6040500@goop.org>
Date:	Mon, 16 Jun 2008 14:54:51 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	the arch/x86 maintainers <x86@...nel.org>
CC:	Yinghai Lu <yhlu.kernel@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/3] xen: set max_pfn_mapped

We need to set max_pfn_mapped, so do so.  Xen guarantees that at least 512k is
mapped beyond the end of the kernel image, so we can rely on that being present.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Cc: Yinghai Lu <yhlu.kernel@...il.com>
---
 arch/x86/xen/enlighten.c |    1 +
 1 file changed, 1 insertion(+)

===================================================================
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1266,6 +1266,7 @@
 
 	init_pg_tables_start = __pa(pgd);
 	init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE;
+	max_pfn_mapped = (init_pg_tables_end + 512*1024) >> PAGE_SHIFT;
 
 	init_mm.pgd = pgd; /* use the Xen pagetables to start */
 


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