diff options
| author | Brian Gerst <brgerst@gmail.com> | 2010-07-17 09:03:28 -0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-07-22 00:23:51 -0400 |
| commit | 650fb4393dff543bc980d361555c489fbdeed088 (patch) | |
| tree | d797faaa1448620e8c7132e8b81f2ad59c34e510 /arch/x86/kernel/head_64.S | |
| parent | cfaa71ee9794472598d3966c3315cd6bd8f953d3 (diff) | |
x86-64: Simplify loading initial_gs
Load initial_gs as two 32-bit values instead of splitting a 64-bit value.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1279371808-24804-3-git-send-email-brgerst@gmail.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/head_64.S')
| -rw-r--r-- | arch/x86/kernel/head_64.S | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index 3d1e6f16b7a6..239046bd447f 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S | |||
| @@ -234,9 +234,8 @@ ENTRY(secondary_startup_64) | |||
| 234 | * init data section till per cpu areas are set up. | 234 | * init data section till per cpu areas are set up. |
| 235 | */ | 235 | */ |
| 236 | movl $MSR_GS_BASE,%ecx | 236 | movl $MSR_GS_BASE,%ecx |
| 237 | movq initial_gs(%rip),%rax | 237 | movl initial_gs(%rip),%eax |
| 238 | movq %rax,%rdx | 238 | movl initial_gs+4(%rip),%edx |
| 239 | shrq $32,%rdx | ||
| 240 | wrmsr | 239 | wrmsr |
| 241 | 240 | ||
| 242 | /* esi is pointer to real mode structure with interesting info. | 241 | /* esi is pointer to real mode structure with interesting info. |