x86: same gdt_page with macro
Move the 32-bit and 64-bit gdt_page definitions next to each other, separated with an #ifdef. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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2 changed files with 54 additions and 0 deletions
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@ -40,6 +40,22 @@
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static struct cpu_dev *this_cpu __cpuinitdata;
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#ifdef CONFIG_X86_64
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/* We need valid kernel segments for data and code in long mode too
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* IRET will check the segment types kkeil 2000/10/28
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* Also sysret mandates a special GDT layout
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*/
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/* The TLS descriptors are currently at a different place compared to i386.
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Hopefully nobody expects them at a fixed place (Wine?) */
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DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },
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[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },
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[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },
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[GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },
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[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
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[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
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} };
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#else
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DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
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[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
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@ -74,6 +90,7 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
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[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
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} };
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#endif
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EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
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static int cachesize_override __cpuinitdata = -1;
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@ -39,6 +39,7 @@
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static struct cpu_dev *this_cpu __cpuinitdata;
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#ifdef CONFIG_X86_64
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/* We need valid kernel segments for data and code in long mode too
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* IRET will check the segment types kkeil 2000/10/28
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* Also sysret mandates a special GDT layout
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@ -53,6 +54,42 @@ DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },
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[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },
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} };
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#else
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DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
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[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
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[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
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[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },
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[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },
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/*
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* Segments used for calling PnP BIOS have byte granularity.
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* They code segments and data segments have fixed 64k limits,
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* the transfer segment sizes are set at run time.
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*/
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/* 32-bit code */
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[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },
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/* 16-bit code */
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[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },
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/* 16-bit data */
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[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },
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/* 16-bit data */
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[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },
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/* 16-bit data */
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[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },
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/*
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* The APM segments have byte granularity and their bases
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* are set at run time. All have 64k limits.
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*/
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/* 32-bit code */
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[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },
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/* 16-bit code */
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[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },
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/* data */
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[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },
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[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },
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[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },
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} };
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#endif
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EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);
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__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;
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