diff options
author | James Bottomley <James.Bottomley@SteelEye.com> | 2006-02-24 16:04:14 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-24 17:31:38 -0500 |
commit | 2b932f6cf052920fb3a6281499e08209b08f5086 (patch) | |
tree | c2710e09dd40ee9733bcd77234d6373acec741d2 /arch/i386/kernel/head.S | |
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/head.S')
-rw-r--r-- | arch/i386/kernel/head.S | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S index 2bee6499edd9..e0b7c632efbc 100644 --- a/arch/i386/kernel/head.S +++ b/arch/i386/kernel/head.S | |||
@@ -534,5 +534,3 @@ ENTRY(cpu_gdt_table) | |||
534 | .quad 0x0000000000000000 /* 0xf0 - unused */ | 534 | .quad 0x0000000000000000 /* 0xf0 - unused */ |
535 | .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */ | 535 | .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */ |
536 | 536 | ||
537 | /* Be sure this is zeroed to avoid false validations in Xen */ | ||
538 | .fill PAGE_SIZE_asm / 8 - GDT_ENTRIES,8,0 | ||