From: ebiederm@xmission.com (Eric W. Biederman)
To: Andi Kleen <ak@suse.de>
Cc: virtualization <virtualization@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
Dave Jones <davej@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jeremy Fitzhardinge <jeremy@goop.org>
Subject: [PATCH 03/12] i386 head.S: Always run the full set of paging state
Date: Mon, 30 Apr 2007 09:51:13 -0600 [thread overview]
Message-ID: <m1zm4p509a.fsf_-_@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <m14pmx6ewk.fsf_-_@ebiederm.dsl.xmission.com> (Eric W. Biederman's message of "Mon, 30 Apr 2007 09:49:31 -0600")
I am preparing to convert the boot time page table to the kernels
native format. To achieve that I need to enable PAE. Enabling PSE
and the no execute bit would not hurt. So this patch modifies
the boot cpu path to execute all of the kernels enable code
if and only if we have the proper bits set in mmu_cr4_features.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
arch/i386/kernel/head.S | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S
index aa9e28e..248d44c 100644
--- a/arch/i386/kernel/head.S
+++ b/arch/i386/kernel/head.S
@@ -181,6 +181,8 @@ ENTRY(startup_32_smp)
movl %eax,%es
movl %eax,%fs
movl %eax,%gs
+#endif /* CONFIG_SMP */
+3:
/*
* New page tables may be in 4Mbyte page mode and may
@@ -227,8 +229,6 @@ ENTRY(startup_32_smp)
wrmsr
6:
-#endif /* CONFIG_SMP */
-3:
/*
* Enable paging
--
1.5.1.1.181.g2de0
next prev parent reply other threads:[~2007-04-30 15:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-30 15:46 [PATCH 0/12] Early USB debug port and i386 boot cleanups Eric W. Biederman
2007-04-30 15:48 ` [PATCH 01/12] x86_64: Allow fixmaps to be used with the initial page table Eric W. Biederman
2007-04-30 15:49 ` [PATCH 02/12] i386 head.S: Remove unnecessary use of %ebx as the boot cpu flag Eric W. Biederman
2007-04-30 15:51 ` Eric W. Biederman [this message]
2007-04-30 15:57 ` [PATCH 04/12] i386 voyager: Use modern techniques to setup and teardown low identiy mappings Eric W. Biederman
2007-04-30 16:03 ` [PATCH 05/12] i386: During page table initialization always set the leaf page table entries Eric W. Biederman
2007-04-30 16:09 ` [PATCH 06/12] i386: Minimum cpu detection cleanups Eric W. Biederman
2007-04-30 16:10 ` [PATCH 07/12] i386: Add missing !X86_PAE dependincy to the 2G/2G split Eric W. Biederman
2007-04-30 16:15 ` [PATCH 08/12] i386: Convert the boot time page tables to the kernels native format Eric W. Biederman
2007-04-30 16:26 ` Andi Kleen
2007-04-30 16:42 ` Eric W. Biederman
2007-04-30 16:32 ` [PATCH 09/12] i386/x86_64: EHCI usb debug port early printk support Eric W. Biederman
2007-04-30 16:32 ` [PATCH 10/12] i386: Introduce head32.c Eric W. Biederman
2007-04-30 16:33 ` [PATCH 11/12] i386: Move setup_idt from head.S to head32.c Eric W. Biederman
2007-04-30 16:35 ` [PATCH 12/12] i386: remove cpuid checking in head.S Eric W. Biederman
2007-04-30 17:56 ` [PATCH 09/12] i386/x86_64: EHCI usb debug port early printk support Andi Kleen
2007-04-30 20:54 ` Eric W. Biederman
2007-04-30 16:16 ` [PATCH 07/12] i386: Add missing !X86_PAE dependincy to the 2G/2G split H. Peter Anvin
2007-04-30 16:39 ` Eric W. Biederman
2007-04-30 16:13 ` [PATCH 06/12] i386: Minimum cpu detection cleanups H. Peter Anvin
2007-04-30 16:19 ` Andi Kleen
2007-04-30 16:21 ` [PATCH 05/12] i386: During page table initialization always set the leaf page table entries Andi Kleen
2007-04-30 16:34 ` Jeremy Fitzhardinge
2007-04-30 17:06 ` [PATCH 04/12] i386 voyager: Use modern techniques to setup and teardown low identiy mappings James Bottomley
2007-04-30 16:23 ` [PATCH 01/12] x86_64: Allow fixmaps to be used with the initial page table Andi Kleen
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