From: Huang, Ying <ying.huang@intel.com>
Date: Wed, 13 Feb 2008 09:22:41 +0000 (+0800)
Subject: x86: EFI runtime code mapping enhancement
X-Git-Tag: v2.6.25-rc2~74^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4de0d4a6d173351b023ab2855c3d331146a418e5;p=pandora-kernel.git

x86: EFI runtime code mapping enhancement

This patch enhances EFI runtime code memory mapping as following:

- Move __supported_pte_mask & _PAGE_NX checking before invoking
  runtime_code_page_mkexec(). This makes it possible for compiler to
  eliminate runtime_code_page_mkexec() on machine without NX support.

- Use set_memory_x/nx in early_mapping_set_exec(). This eliminates the
  duplicated implementation.

This patch has been tested on Intel x86_64 platform with EFI64/32
firmware.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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