From 90b1c2085ea1955641e60a4f0acd63fdc271cd0b Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Wed, 2 May 2007 19:27:07 +0200 Subject: [PATCH] x86-64: 64bit PIC SMP trampoline This modifies the SMP trampoline and all of the associated code so it can jump to a 64bit kernel loaded at an arbitrary address. The dependencies on having an idenetity mapped page in the kernel page tables for SMP bootup have all been removed. In addition the trampoline has been modified to verify that long mode is supported. Asking if long mode is implemented is down right silly but we have traditionally had some of these checks, and they can't hurt anything. So when the totally ludicrous happens we just might handle it correctly. Signed-off-by: Eric W. Biederman Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen --- arch/x86_64/kernel/head.S | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86_64/kernel/head.S') diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 2b2e2c51e532..562d62fbd69f 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -101,6 +101,7 @@ startup_32: .org 0x100 .globl startup_64 startup_64: +ENTRY(secondary_startup_64) /* We come here either from startup_32 * or directly from a 64bit bootloader. * Since we may have come directly from a bootloader we -- cgit v1.2.3