Commit 650fb439 authored Jul 17, 2010 by Brian Gerst Committed by H. Peter Anvin Jul 21, 2010

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>

parent cfaa71ee

arch/x86/kernel/head_64.S

+2 −3

Original line number	Diff line number	Diff line
		@@ -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.