diff options
Diffstat (limited to 'arch/x86/mm/cpu_entry_area.c')
| -rw-r--r-- | arch/x86/mm/cpu_entry_area.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index 82ead8e27888..56f9189bbadb 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -17,6 +17,10 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(struct exception_stacks, exception_stacks); DEFINE_PER_CPU(struct cea_exception_stacks*, cea_exception_stacks); #endif +#if defined(CONFIG_X86_32) && defined(CONFIG_DOUBLEFAULT) +DECLARE_PER_CPU_PAGE_ALIGNED(struct doublefault_stack, doublefault_stack); +#endif + struct cpu_entry_area *get_cpu_entry_area(int cpu) { unsigned long va = CPU_ENTRY_AREA_PER_CPU + cpu * CPU_ENTRY_AREA_SIZE; @@ -108,7 +112,15 @@ static void __init percpu_setup_exception_stacks(unsigned int cpu) cea_map_stack(MCE); } #else -static inline void percpu_setup_exception_stacks(unsigned int cpu) {} +static inline void percpu_setup_exception_stacks(unsigned int cpu) +{ +#ifdef CONFIG_DOUBLEFAULT + struct cpu_entry_area *cea = get_cpu_entry_area(cpu); + + cea_map_percpu_pages(&cea->doublefault_stack, + &per_cpu(doublefault_stack, cpu), 1, PAGE_KERNEL); +#endif +} #endif /* Setup the fixmap mappings only once per-processor */ |