x86: EFI runtime code mapping enhancement
authorHuang, Ying <ying.huang@intel.com>
Wed, 13 Feb 2008 09:22:41 +0000 (17:22 +0800)
committerIngo Molnar <mingo@elte.hu>
Wed, 13 Feb 2008 15:20:35 +0000 (16:20 +0100)
commit4de0d4a6d173351b023ab2855c3d331146a418e5
tree59fd58a74fc693e8b7c2b769180abc8bcbd2df61
parente85f20518bb928667508c22090c85d458e25a4f7
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>
arch/x86/kernel/efi.c
arch/x86/kernel/efi_64.c