Commit 950ad7ff authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

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: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent f0fc4aff

arch/x86/kernel/cpu/common.c

+17 −0
Original line number Diff line number Diff line
@@ -40,6 +40,22 @@ 


static struct cpu_dev *this_cpu __cpuinitdata;



#ifdef CONFIG_X86_64

/* We need valid kernel segments for data and code in long mode too

 * IRET will check the segment types  kkeil 2000/10/28

 * Also sysret mandates a special GDT layout

 */

/* The TLS descriptors are currently at a different place compared to i386.

   Hopefully nobody expects them at a fixed place (Wine?) */

DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {

	[GDT_ENTRY_KERNEL32_CS] = { { { 0x0000ffff, 0x00cf9b00 } } },

	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00af9b00 } } },

	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9300 } } },

	[GDT_ENTRY_DEFAULT_USER32_CS] = { { { 0x0000ffff, 0x00cffb00 } } },

	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },

	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },

} };

#else

DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {

	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },

	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
@@ -74,6 +90,7 @@ DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = { 
	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },

	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },

} };

#endif

EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);



static int cachesize_override __cpuinitdata = -1;

arch/x86/kernel/cpu/common_64.c

+37 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 


static struct cpu_dev *this_cpu __cpuinitdata;



#ifdef CONFIG_X86_64

/* We need valid kernel segments for data and code in long mode too

 * IRET will check the segment types  kkeil 2000/10/28

 * Also sysret mandates a special GDT layout
@@ -53,6 +54,42 @@ DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = { 
	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff300 } } },

	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00affb00 } } },

} };

#else

DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {

	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },

	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },

	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },

	[GDT_ENTRY_DEFAULT_USER_DS] = { { { 0x0000ffff, 0x00cff200 } } },

	/*

	 * Segments used for calling PnP BIOS have byte granularity.

	 * They code segments and data segments have fixed 64k limits,

	 * the transfer segment sizes are set at run time.

	 */

	/* 32-bit code */

	[GDT_ENTRY_PNPBIOS_CS32] = { { { 0x0000ffff, 0x00409a00 } } },

	/* 16-bit code */

	[GDT_ENTRY_PNPBIOS_CS16] = { { { 0x0000ffff, 0x00009a00 } } },

	/* 16-bit data */

	[GDT_ENTRY_PNPBIOS_DS] = { { { 0x0000ffff, 0x00009200 } } },

	/* 16-bit data */

	[GDT_ENTRY_PNPBIOS_TS1] = { { { 0x00000000, 0x00009200 } } },

	/* 16-bit data */

	[GDT_ENTRY_PNPBIOS_TS2] = { { { 0x00000000, 0x00009200 } } },

	/*

	 * The APM segments have byte granularity and their bases

	 * are set at run time.  All have 64k limits.

	 */

	/* 32-bit code */

	[GDT_ENTRY_APMBIOS_BASE] = { { { 0x0000ffff, 0x00409a00 } } },

	/* 16-bit code */

	[GDT_ENTRY_APMBIOS_BASE+1] = { { { 0x0000ffff, 0x00009a00 } } },

	/* data */

	[GDT_ENTRY_APMBIOS_BASE+2] = { { { 0x0000ffff, 0x00409200 } } },



	[GDT_ENTRY_ESPFIX_SS] = { { { 0x00000000, 0x00c09200 } } },

	[GDT_ENTRY_PERCPU] = { { { 0x00000000, 0x00000000 } } },

} };

#endif

EXPORT_PER_CPU_SYMBOL_GPL(gdt_page);



__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata;