diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-10-26 11:29:04 -0600 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-27 20:57:43 +0200 |
| commit | bd53147db8bdf5dd49025c198ff18ac23f560e0e (patch) | |
| tree | 50b65c7e72e2fdfc754e9c0844dbb7931d01e2db /arch/x86/boot/compressed/head_64.S | |
| parent | 0cca1ca647d87c2c0b0d76d2f32683ce34d54989 (diff) | |
x86: Fix boot protocol KEEP_SEGMENTS check.
The kernel only ever supports 1 version of the boot protocol
so there is no need to check the boot protocol revision to
see if a feature is supported.
Both x86 and x86_64 support the same boot protocol so we need
to implement the KEEP_SEGMENTS on x86_64 as well. It isn't
just paravirt bootloaders that could use this functionality.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@suse.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/boot/compressed/head_64.S')
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 49467640751..1ccb38a7f0d 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -29,6 +29,7 @@ #include <asm/pgtable.h> #include <asm/page.h> #include <asm/msr.h> +#include <asm/asm-offsets.h> .section ".text.head" .code32 @@ -36,11 +37,17 @@ startup_32: cld + /* test KEEP_SEGMENTS flag to see if the bootloader is asking + * us to not reload segments */ + testb $(1<<6), BP_loadflags(%esi) + jnz 1f + cli movl $(__KERNEL_DS), %eax movl %eax, %ds movl %eax, %es movl %eax, %ss +1: /* Calculate the delta between where we were compiled to run * at and where we were actually loaded at. This can only be done |