diff options
author | Jan Beulich <jbeulich@novell.com> | 2006-03-25 15:30:01 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 17:10:54 (GMT) |
commit | e57113bc1ff591005ec0b0fb4885d97c01de73d8 (patch) | |
tree | 5e383dc4bdb5decf06adecca6da76fec6cbaa7d8 /arch/x86_64 | |
parent | 1f50249e940baa7133e0bdb32cd564bb3ba28456 (diff) | |
download | linux-fsl-qoriq-e57113bc1ff591005ec0b0fb4885d97c01de73d8.tar.xz |
[PATCH] x86_64: miscellaneous cleanup
- adjust limits of GDT/IDT pseudo-descriptors (some were off by one)
- move empty_zero_page into .bss.page_aligned
- move cpu_gdt_table into .data.page_aligned
- move idt_table into .bss
- align inital_code and init_rsp
- eliminate pointless (re-)declaration of idt_table in traps.c
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r-- | arch/x86_64/kernel/head.S | 25 | ||||
-rw-r--r-- | arch/x86_64/kernel/setup64.c | 2 | ||||
-rw-r--r-- | arch/x86_64/kernel/traps.c | 2 |
3 files changed, 15 insertions, 14 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S index 02fc7fa..0cddcc0 100644 --- a/arch/x86_64/kernel/head.S +++ b/arch/x86_64/kernel/head.S @@ -192,7 +192,8 @@ startup_64: movq initial_code(%rip),%rax jmp *%rax - /* SMP bootup changes these two */ + /* SMP bootup changes these two */ + .align 8 .globl initial_code initial_code: .quad x86_64_start_kernel @@ -237,7 +238,7 @@ ENTRY(no_long_mode) .org 0xf00 .globl pGDT32 pGDT32: - .word gdt_end-cpu_gdt_table + .word gdt_end-cpu_gdt_table-1 .long cpu_gdt_table-__START_KERNEL_map .org 0xf10 @@ -293,8 +294,6 @@ NEXT_PAGE(level2_kernel_pgt) /* Module mapping starts here */ .fill 492,8,0 -NEXT_PAGE(empty_zero_page) - NEXT_PAGE(level3_physmem_pgt) .quad phys_level2_kernel_pgt | 0x007 /* so that __va works even before pagetable_init */ .fill 511,8,0 @@ -337,7 +336,7 @@ ENTRY(boot_level4_pgt) .align 16 .globl cpu_gdt_descr cpu_gdt_descr: - .word gdt_end-cpu_gdt_table + .word gdt_end-cpu_gdt_table-1 gdt: .quad cpu_gdt_table #ifdef CONFIG_SMP @@ -352,7 +351,8 @@ gdt: * Also sysret mandates a special GDT layout */ -.align PAGE_SIZE + .section .data.page_aligned, "aw" + .align PAGE_SIZE /* The TLS descriptors are currently at a different place compared to i386. Hopefully nobody expects them at a fixed place (Wine?) */ @@ -378,9 +378,12 @@ gdt_end: /* zero the remaining page */ .fill PAGE_SIZE / 8 - GDT_ENTRIES,8,0 -ENTRY(idt_table) - .rept 256 - .quad 0 - .quad 0 - .endr + .section .bss, "aw", @nobits + .align L1_CACHE_BYTES +ENTRY(idt_table) + .skip 256 * 16 + .section .bss.page_aligned, "aw", @nobits + .align PAGE_SIZE +ENTRY(empty_zero_page) + .skip PAGE_SIZE diff --git a/arch/x86_64/kernel/setup64.c b/arch/x86_64/kernel/setup64.c index 0445878..356b462 100644 --- a/arch/x86_64/kernel/setup64.c +++ b/arch/x86_64/kernel/setup64.c @@ -33,7 +33,7 @@ cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE; struct x8664_pda *_cpu_pda[NR_CPUS] __read_mostly; struct x8664_pda boot_cpu_pda[NR_CPUS] __cacheline_aligned; -struct desc_ptr idt_descr = { 256 * 16, (unsigned long) idt_table }; +struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table }; char boot_cpu_stack[IRQSTACKSIZE] __attribute__((section(".bss.page_aligned"))); diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index 05dbbf4..7b14830 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -47,8 +47,6 @@ #include <asm/proto.h> #include <asm/nmi.h> -extern struct gate_struct idt_table[256]; - asmlinkage void divide_error(void); asmlinkage void debug(void); asmlinkage void nmi(void); |