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authorJeremy Fitzhardinge <jeremy@goop.org>2009-02-02 13:55:31 -0800
committerH. Peter Anvin <hpa@linux.intel.com>2009-02-04 16:59:02 -0800
commit383414322b3b3ced0cbc146801e0cc6c60a6c5f4 (patch)
treef6abd0c09f3f15c1fd78d81a443ae4bf985bdc84 /arch/x86/xen/smp.c
parent327641da8e3e227f42690479182b896fd19486be (diff)
xen: setup percpu data pointers
We need to access percpu data fairly early, so set up the percpu registers as soon as possible. We only need to load the appropriate segment register. We already have a GDT, but its hard to change it early because we need to manipulate the pagetable to do so, and that hasn't been set up yet. Also, set the kernel stack when bringing up secondary CPUs. If we don't they all end up sharing the same stack... Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/xen/smp.c')
-rw-r--r--arch/x86/xen/smp.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 88d5d5ec6be..035582ae815 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -170,8 +170,7 @@ static void __init xen_smp_prepare_boot_cpu(void)
/* We've switched to the "real" per-cpu gdt, so make sure the
old memory can be recycled */
- make_lowmem_page_readwrite(__per_cpu_load +
- (unsigned long)&per_cpu_var(gdt_page));
+ make_lowmem_page_readwrite(xen_initial_gdt);
xen_setup_vcpu_info_placement();
}
@@ -287,6 +286,9 @@ static int __cpuinit xen_cpu_up(unsigned int cpu)
irq_ctx_init(cpu);
#else
clear_tsk_thread_flag(idle, TIF_FORK);
+ per_cpu(kernel_stack, cpu) =
+ (unsigned long)task_stack_page(idle) -
+ KERNEL_STACK_OFFSET + THREAD_SIZE;
#endif
xen_setup_timer(cpu);
xen_init_lock_cpu(cpu);