diff options
author | Shai Fultheim <shai@scalex86.org> | 2004-08-22 22:41:58 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-08-22 22:41:58 -0700 |
commit | cf0cf37deec381ff17883ba9a7b326d613c583e8 (patch) | |
tree | f9a3593e411d74c970f4a7f33582afe9df288beb /arch | |
parent | c3baa3de57fbc961e7f4e8bb5e05bc94f75b4e26 (diff) | |
download | history-cf0cf37deec381ff17883ba9a7b326d613c583e8.tar.gz |
[PATCH] percpu: cpu_gdt_table
Use the percpu infrastructure rather than open-coded array[NR_CPUS].
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/i386/kernel/apm.c | 34 | ||||
-rw-r--r-- | arch/i386/kernel/cpu/common.c | 23 | ||||
-rw-r--r-- | arch/i386/kernel/head.S | 3 | ||||
-rw-r--r-- | arch/i386/mm/fault.c | 2 | ||||
-rw-r--r-- | arch/i386/power/cpu.c | 2 |
5 files changed, 34 insertions, 30 deletions
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c index 3b1ef4bcbe699b..3bfc2cbb84643c 100644 --- a/arch/i386/kernel/apm.c +++ b/arch/i386/kernel/apm.c @@ -601,8 +601,8 @@ static u8 apm_bios_call(u32 func, u32 ebx_in, u32 ecx_in, cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = cpu_gdt_table[cpu][0x40 / 8]; - cpu_gdt_table[cpu][0x40 / 8] = bad_bios_desc; + save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; + per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +610,7 @@ static u8 apm_bios_call(u32 func, u32 ebx_in, u32 ecx_in, apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - cpu_gdt_table[cpu][0x40 / 8] = save_desc_40; + per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; put_cpu(); apm_restore_cpus(cpus); @@ -644,8 +644,8 @@ static u8 apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax) cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = cpu_gdt_table[cpu][0x40 / 8]; - cpu_gdt_table[cpu][0x40 / 8] = bad_bios_desc; + save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; + per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -653,7 +653,7 @@ static u8 apm_bios_call_simple(u32 func, u32 ebx_in, u32 ecx_in, u32 *eax) error = apm_bios_call_simple_asm(func, ebx_in, ecx_in, eax); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - cpu_gdt_table[smp_processor_id()][0x40 / 8] = save_desc_40; + __get_cpu_var(cpu_gdt_table)[0x40 / 8] = save_desc_40; put_cpu(); apm_restore_cpus(cpus); return error; @@ -2292,35 +2292,35 @@ static int __init apm_init(void) apm_bios_entry.segment = APM_CS; for (i = 0; i < NR_CPUS; i++) { - set_base(cpu_gdt_table[i][APM_CS >> 3], + set_base(per_cpu(cpu_gdt_table, i)[APM_CS >> 3], __va((unsigned long)apm_info.bios.cseg << 4)); - set_base(cpu_gdt_table[i][APM_CS_16 >> 3], + set_base(per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3], __va((unsigned long)apm_info.bios.cseg_16 << 4)); - set_base(cpu_gdt_table[i][APM_DS >> 3], + set_base(per_cpu(cpu_gdt_table, i)[APM_DS >> 3], __va((unsigned long)apm_info.bios.dseg << 4)); #ifndef APM_RELAX_SEGMENTS if (apm_info.bios.version == 0x100) { #endif /* For ASUS motherboard, Award BIOS rev 110 (and others?) */ - _set_limit((char *)&cpu_gdt_table[i][APM_CS >> 3], 64 * 1024 - 1); + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3], 64 * 1024 - 1); /* For some unknown machine. */ - _set_limit((char *)&cpu_gdt_table[i][APM_CS_16 >> 3], 64 * 1024 - 1); + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3], 64 * 1024 - 1); /* For the DEC Hinote Ultra CT475 (and others?) */ - _set_limit((char *)&cpu_gdt_table[i][APM_DS >> 3], 64 * 1024 - 1); + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_DS >> 3], 64 * 1024 - 1); #ifndef APM_RELAX_SEGMENTS } else { - _set_limit((char *)&cpu_gdt_table[i][APM_CS >> 3], + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3], (apm_info.bios.cseg_len - 1) & 0xffff); - _set_limit((char *)&cpu_gdt_table[i][APM_CS_16 >> 3], + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS_16 >> 3], (apm_info.bios.cseg_16_len - 1) & 0xffff); - _set_limit((char *)&cpu_gdt_table[i][APM_DS >> 3], + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_DS >> 3], (apm_info.bios.dseg_len - 1) & 0xffff); /* workaround for broken BIOSes */ if (apm_info.bios.cseg_len <= apm_info.bios.offset) - _set_limit((char *)&cpu_gdt_table[i][APM_CS >> 3], 64 * 1024 -1); + _set_limit((char *)&per_cpu(cpu_gdt_table, i)[APM_CS >> 3], 64 * 1024 -1); if (apm_info.bios.dseg_len <= 0x40) { /* 0x40 * 4kB == 64kB */ /* for the BIOS that assumes granularity = 1 */ - cpu_gdt_table[i][APM_DS >> 3].b |= 0x800000; + per_cpu(cpu_gdt_table, i)[APM_DS >> 3].b |= 0x800000; printk(KERN_NOTICE "apm: we set the granularity of dseg.\n"); } } diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c index 30e25e3572f4f4..9f048bba69ebc8 100644 --- a/arch/i386/kernel/cpu/common.c +++ b/arch/i386/kernel/cpu/common.c @@ -2,6 +2,8 @@ #include <linux/string.h> #include <linux/delay.h> #include <linux/smp.h> +#include <linux/module.h> +#include <linux/percpu.h> #include <asm/semaphore.h> #include <asm/processor.h> #include <asm/i387.h> @@ -11,6 +13,9 @@ #include "cpu.h" +DEFINE_PER_CPU(struct desc_struct, cpu_gdt_table[GDT_ENTRIES]); +EXPORT_PER_CPU_SYMBOL(cpu_gdt_table); + static int cachesize_override __initdata = -1; static int disable_x86_fxsr __initdata = 0; static int disable_x86_serial_nr __initdata = 1; @@ -523,15 +528,17 @@ void __init cpu_init (void) * Initialize the per-CPU GDT with the boot GDT, * and set up the GDT descriptor: */ - if (cpu) { - memcpy(cpu_gdt_table[cpu], cpu_gdt_table[0], GDT_SIZE); - cpu_gdt_descr[cpu].size = GDT_SIZE - 1; - cpu_gdt_descr[cpu].address = (unsigned long)cpu_gdt_table[cpu]; - } + memcpy(&per_cpu(cpu_gdt_table, cpu), cpu_gdt_table, + GDT_SIZE); + cpu_gdt_descr[cpu].size = GDT_SIZE - 1; + cpu_gdt_descr[cpu].address = + (unsigned long)&per_cpu(cpu_gdt_table, cpu); + /* * Set up the per-thread TLS descriptor cache: */ - memcpy(thread->tls_array, cpu_gdt_table[cpu], GDT_ENTRY_TLS_ENTRIES * 8); + memcpy(thread->tls_array, &per_cpu(cpu_gdt_table, cpu), + GDT_ENTRY_TLS_ENTRIES * 8); __asm__ __volatile__("lgdt %0" : : "m" (cpu_gdt_descr[cpu])); __asm__ __volatile__("lidt %0" : : "m" (idt_descr)); @@ -552,13 +559,13 @@ void __init cpu_init (void) load_esp0(t, thread); set_tss_desc(cpu,t); - cpu_gdt_table[cpu][GDT_ENTRY_TSS].b &= 0xfffffdff; + per_cpu(cpu_gdt_table,cpu)[GDT_ENTRY_TSS].b &= 0xfffffdff; load_TR_desc(); load_LDT(&init_mm.context); /* Set up doublefault TSS pointer in the GDT */ __set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss); - cpu_gdt_table[cpu][GDT_ENTRY_DOUBLEFAULT_TSS].b &= 0xfffffdff; + per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_DOUBLEFAULT_TSS].b &= 0xfffffdff; /* Clear %fs and %gs. */ asm volatile ("xorl %eax, %eax; movl %eax, %fs; movl %eax, %gs"); diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S index 69bad9bd0f9b22..95fe2fdf466056 100644 --- a/arch/i386/kernel/head.S +++ b/arch/i386/kernel/head.S @@ -521,6 +521,3 @@ ENTRY(cpu_gdt_table) .quad 0x0000000000000000 /* 0xf0 - unused */ .quad 0x0000000000000000 /* 0xf8 - GDT entry 31: double-fault TSS */ -#ifdef CONFIG_SMP - .fill (NR_CPUS-1)*GDT_ENTRIES,8,0 /* other CPU's GDT */ -#endif diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c index debed47543a245..319749e2e2d80f 100644 --- a/arch/i386/mm/fault.c +++ b/arch/i386/mm/fault.c @@ -107,7 +107,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs, desc = (void *)desc + (seg & ~7); } else { /* Must disable preemption while reading the GDT. */ - desc = (u32 *)&cpu_gdt_table[get_cpu()]; + desc = (u32 *)&per_cpu(cpu_gdt_table, get_cpu()); desc = (void *)desc + (seg & ~7); } diff --git a/arch/i386/power/cpu.c b/arch/i386/power/cpu.c index d58d307778cab5..2a6234a07b4b07 100644 --- a/arch/i386/power/cpu.c +++ b/arch/i386/power/cpu.c @@ -86,7 +86,7 @@ static void fix_processor_context(void) struct tss_struct * t = init_tss + cpu; set_tss_desc(cpu,t); /* This just modifies memory; should not be necessary. But... This is necessary, because 386 hardware has concept of busy TSS or some similar stupidity. */ - cpu_gdt_table[cpu][GDT_ENTRY_TSS].b &= 0xfffffdff; + per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_TSS].b &= 0xfffffdff; load_TR_desc(); /* This does ltr */ load_LDT(¤t->active_mm->context); /* This does lldt */ |