diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2013-01-24 20:20:00 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2013-01-29 23:26:15 (GMT) |
| commit | 187a8a73cee295b9407de0d6bfba65471a1f39d6 (patch) | |
| tree | 0d6d75aa30458cac69e9f3a79508c4b8698acbde /arch/x86 | |
| parent | 3db07e70f0b4742f8daeda5c4aa8fbe7aeb3799e (diff) | |
| download | linux-187a8a73cee295b9407de0d6bfba65471a1f39d6.tar.xz | |
x86, boot: Move verify_cpu.S and no_longmode down
We need to move some code to 32bit section in following patch:
x86, boot: Move lldt/ltr out of 64bit code section
but that will push startup_64 down from 0x200.
According to hpa, we can not change startup_64 position and that
is an ABI.
We could move function verify_cpu and no_longmode down, because
verify_cpu is used via function call and no_longmode will not
return, then we don't need to add extra code for jumping back.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-20-git-send-email-yinghai@kernel.org
Cc: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 2c4b171..fb984c0 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -176,14 +176,6 @@ ENTRY(startup_32) lret ENDPROC(startup_32) -no_longmode: - /* This isn't an x86-64 CPU so hang */ -1: - hlt - jmp 1b - -#include "../../kernel/verify_cpu.S" - /* * Be careful here startup_64 needs to be at a predictable * address so I can export it in an ELF header. Bootloaders @@ -349,6 +341,15 @@ relocated: */ jmp *%rbp + .code32 +no_longmode: + /* This isn't an x86-64 CPU so hang */ +1: + hlt + jmp 1b + +#include "../../kernel/verify_cpu.S" + .data gdt: .word gdt_end - gdt |