diff options
| author | James Bottomley <James.Bottomley@SteelEye.com> | 2006-02-24 13:04:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-24 14:31:38 -0800 |
| commit | 2b932f6cf052920fb3a6281499e08209b08f5086 (patch) | |
| tree | c2710e09dd40ee9733bcd77234d6373acec741d2 /arch/i386/kernel/efi.c | |
| parent | 1e275d406bf6b88e4de6925cf594b64bb2ec49bc (diff) | |
[PATCH] x86: fix broken SMP boot sequence
Recent GDT changes broke the SMP boot sequence if the booting CPU is
numbered anything other than zero. There's also a subtle source of error
in that the boot time CPU now uses cpu_gdt_table (which is actually the GDT
for booting CPUs in head.S). This patch fixes both problems by making GDT
descriptors themselves allocated from a per_cpu area and switching to them
in cpu_init(), which now means that cpu_gdt_table is exclusively used for
booting CPUs again.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Matt Tolentino <metolent@snoqualmie.dp.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/efi.c')
| -rw-r--r-- | arch/i386/kernel/efi.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/i386/kernel/efi.c b/arch/i386/kernel/efi.c index ecad519fd39..e3e42fd6240 100644 --- a/arch/i386/kernel/efi.c +++ b/arch/i386/kernel/efi.c @@ -103,17 +103,19 @@ static void efi_call_phys_prelog(void) */ local_flush_tlb(); - cpu_gdt_descr[0].address = __pa(cpu_gdt_descr[0].address); - load_gdt((struct Xgt_desc_struct *) __pa(&cpu_gdt_descr[0])); + per_cpu(cpu_gdt_descr, 0).address = + __pa(per_cpu(cpu_gdt_descr, 0).address); + load_gdt((struct Xgt_desc_struct *)__pa(&per_cpu(cpu_gdt_descr, 0))); } static void efi_call_phys_epilog(void) { unsigned long cr4; - cpu_gdt_descr[0].address = - (unsigned long) __va(cpu_gdt_descr[0].address); - load_gdt(&cpu_gdt_descr[0]); + per_cpu(cpu_gdt_descr, 0).address = + (unsigned long)__va(per_cpu(cpu_gdt_descr, 0).address); + load_gdt((struct Xgt_desc_struct *)__va(&per_cpu(cpu_gdt_descr, 0))); + cr4 = read_cr4(); if (cr4 & X86_CR4_PSE) { |