diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@intel.com> | 2012-05-08 21:22:40 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-05-08 11:48:11 -0700 |
| commit | 8e029fcdd8702719c9179317cae9ef84ebe7027e (patch) | |
| tree | 12140b7331764ff0e0cd4e0d7bd290453d51110f /arch/x86/realmode/rm/trampoline_32.S | |
| parent | 6feb592dceaed1a6cf26c9747b1180958d5156cd (diff) | |
| download | linux-8e029fcdd8702719c9179317cae9ef84ebe7027e.tar.bz2 | |
x86, realmode: fix 64-bit wakeup sequence
There were number of issues in wakeup sequence:
- Wakeup stack was placed in hardcoded address.
- NX bit in EFER was not enabled.
- Initialization incorrectly set physical address
of secondary_startup_64.
- Some alignment issues.
This patch fixes these issues and in addition:
- Unifies coding conventions in .S files.
- Sets alignments of code and data right.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@intel.com>
Link: http://lkml.kernel.org/r/1336501366-28617-18-git-send-email-jarkko.sakkinen@intel.com
Originally-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/realmode/rm/trampoline_32.S')
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_32.S | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/arch/x86/realmode/rm/trampoline_32.S b/arch/x86/realmode/rm/trampoline_32.S index 279f82ef7a9e..1ecdbb59191b 100644 --- a/arch/x86/realmode/rm/trampoline_32.S +++ b/arch/x86/realmode/rm/trampoline_32.S @@ -33,10 +33,9 @@ .text .code16 - .globl trampoline_data - .balign PAGE_SIZE -trampoline_data: + .balign PAGE_SIZE +ENTRY(trampoline_data) wbinvd # Needed for NUMA-Q should be harmless for others LJMPW_RM(1f) @@ -70,20 +69,22 @@ trampoline_data: ENTRY(startup_32) # note: also used from wakeup_asm.S jmp *%eax - .data - .globl startup_32_smp, boot_gdt, trampoline_status - .balign 4 -boot_gdt_descr: - .word __BOOT_DS + 7 # gdt limit -boot_gdt: - .long 0 # gdt base + .section ".rodata","a" + .balign 4 boot_idt_descr: .word 0 # idt limit = 0 .long 0 # idt base = 0L -trampoline_status: - .long 0 + .data -startup_32_smp: - .long 0 +boot_gdt_descr: + .word __BOOT_DS + 7 # gdt limit +GLOBAL(boot_gdt) + .long 0 # gdt base + + .bss + + .balign 4 +GLOBAL(trampoline_status) .space 4 +GLOBAL(startup_32_smp) .space 4 |