linux-kernel - [PATCH 1 of 8] x86_64: create global mappings in head

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Message-Id: <353bdb9d31cbee91deea.1214955990@localhost>
Date:	Tue, 01 Jul 2008 16:46:30 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	Stephen Tweedie <sct@...hat.com>,
	Eduardo Habkost <ehabkost@...hat.com>,
	Mark McLoughlin <markmc@...hat.com>, x86@...nel.org
Subject: [PATCH 1 of 8] x86_64: create global mappings in head_64.S

When creating the initial set of pagetables in head_64.S, create them
global.  This matches the mappings created later in the kernel boot;
this means we can reuse these pagetables without causing an
inconsistency.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/kernel/head_64.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -374,7 +374,7 @@
 	/* Since I easily can, map the first 1G.
 	 * Don't set NX because code runs from these pages.
 	 */
-	PMDS(0, __PAGE_KERNEL_LARGE_EXEC, PTRS_PER_PMD)
+	PMDS(0, __PAGE_KERNEL_LARGE_EXEC | _PAGE_GLOBAL, PTRS_PER_PMD)
 
 NEXT_PAGE(level2_kernel_pgt)
 	/*


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