linux-kernel - [PATCH 0/2] x86: Fix issues when eXecute Disable (XD) bit is disabled in uEFI firmware

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Date:	Thu, 3 Dec 2015 23:58:31 +0000
From:	Kosuke Tatsukawa <tatsu@...jp.nec.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>
CC:	Matt Fleming <matt.fleming@...el.com>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/2] x86: Fix issues when eXecute Disable (XD) bit is
 disabled in uEFI firmware

The kernel panics early in boot on a x86_64 server if the eXecute
Disable (XD) bit is set to disabled in the uEFI firmware.

The following patches fix the panic and also fix an error in
kernel_map_pages_in_pgd() which would make the EFI runtime service
unavailable when the XD bit is set to disabled.

Kosuke Tatsukawa (2):
  x86: Fix kernel panic when booting with XD disabled in uEFI firmware
  x86: Fix error in kernel_map_pages_in_pgd() when booting with XD disabled
---
 arch/x86/kernel/setup.c |   18 +++++++++---------
 arch/x86/mm/ioremap.c   |    3 +++
 arch/x86/mm/pageattr.c  |    6 +-----
 3 files changed, 13 insertions(+), 14 deletions(-)
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