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| author | Zachary Amsden <zach@vmware.com> | 2005-10-30 14:59:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-30 17:37:12 -0800 |
| commit | 251e6912df43df54570ed68aade703b329c6cd5b (patch) | |
| tree | 28695a0c9a468281613a6b8ef8c79596e2764001 /arch/i386/kernel/cpu/common.c | |
| parent | 72e12b76fe48d99d1deb417f177b10a9d99b2e74 (diff) | |
| download | linux-251e6912df43df54570ed68aade703b329c6cd5b.tar.gz linux-251e6912df43df54570ed68aade703b329c6cd5b.tar.bz2 linux-251e6912df43df54570ed68aade703b329c6cd5b.zip | |
[PATCH] x86: add an accessor function for getting the per-CPU gdt
Add an accessor function for getting the per-CPU gdt. Callee must already
have the CPU.
Signed-off-by: Zachary Amsden <zach@vmware.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/common.c')
| -rw-r--r-- | arch/i386/kernel/cpu/common.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c index a162c0326b4a..74145a33cb0f 100644 --- a/arch/i386/kernel/cpu/common.c +++ b/arch/i386/kernel/cpu/common.c @@ -573,6 +573,7 @@ void __devinit cpu_init(void) int cpu = smp_processor_id(); struct tss_struct * t = &per_cpu(init_tss, cpu); struct thread_struct *thread = ¤t->thread; + struct desc_struct *gdt = get_cpu_gdt_table(cpu); __u32 stk16_off = (__u32)&per_cpu(cpu_16bit_stack, cpu); if (cpu_test_and_set(cpu, cpu_initialized)) { @@ -594,18 +595,16 @@ void __devinit cpu_init(void) * Initialize the per-CPU GDT with the boot GDT, * and set up the GDT descriptor: */ - memcpy(&per_cpu(cpu_gdt_table, cpu), cpu_gdt_table, - GDT_SIZE); + memcpy(gdt, cpu_gdt_table, GDT_SIZE); /* Set up GDT entry for 16bit stack */ - *(__u64 *)&(per_cpu(cpu_gdt_table, cpu)[GDT_ENTRY_ESPFIX_SS]) |= + *(__u64 *)(&gdt[GDT_ENTRY_ESPFIX_SS]) |= ((((__u64)stk16_off) << 16) & 0x000000ffffff0000ULL) | ((((__u64)stk16_off) << 32) & 0xff00000000000000ULL) | (CPU_16BIT_STACK_SIZE - 1); cpu_gdt_descr[cpu].size = GDT_SIZE - 1; - cpu_gdt_descr[cpu].address = - (unsigned long)&per_cpu(cpu_gdt_table, cpu); + cpu_gdt_descr[cpu].address = (unsigned long)gdt; load_gdt(&cpu_gdt_descr[cpu]); load_idt(&idt_descr); |