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x86-64: Simplify loading initial_gs

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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>
This commit is contained in:
Brian Gerst 2010-07-17 09:03:28 -04:00 committed by H. Peter Anvin
parent cfaa71ee97
commit 650fb4393d
1 changed files with 2 additions and 3 deletions
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5
arch/x86/kernel/head_64.S
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@ -234,9 +234,8 @@ ENTRY(secondary_startup_64)
* init data section till per cpu areas are set up.
*/
movl $MSR_GS_BASE,%ecx
movq initial_gs(%rip),%rax
movq %rax,%rdx
shrq $32,%rdx
movl initial_gs(%rip),%eax
movl initial_gs+4(%rip),%edx
wrmsr
/* esi is pointer to real mode structure with interesting info.