diff options
| author | Matt Fleming <matt.fleming@intel.com> | 2014-02-24 13:37:29 +0000 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2014-03-04 21:43:59 +0000 |
| commit | 108d3f44b16be2ecf0e44c2f2863752918eb7bce (patch) | |
| tree | d7b13929ee817e10d174e5344bdcc79ca5d58b3a /arch/x86/platform/efi/efi_stub_64.S | |
| parent | 7d453eee36ae4cf30fc2f2faae54f634c4f863b7 (diff) | |
x86/boot: Don't overwrite cr4 when enabling PAE
Some EFI firmware makes use of the FPU during boottime services and
clearing X86_CR4_OSFXSR by overwriting %cr4 causes the firmware to
crash.
Add the PAE bit explicitly instead of trashing the existing contents,
leaving the rest of the bits as the firmware set them.
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/platform/efi/efi_stub_64.S')
0 files changed, 0 insertions, 0 deletions