diff options
Diffstat (limited to 'arch/s390/mm')
-rw-r--r-- | arch/s390/mm/fault.c | 53 | ||||
-rw-r--r-- | arch/s390/mm/hugetlbpage.c | 5 | ||||
-rw-r--r-- | arch/s390/mm/init.c | 7 | ||||
-rw-r--r-- | arch/s390/mm/pgtable.c | 12 | ||||
-rw-r--r-- | arch/s390/mm/vmem.c | 2 |
5 files changed, 29 insertions, 50 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 88cef50..19f623f 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -106,21 +106,24 @@ void bust_spinlocks(int yes) * Returns the address space associated with the fault. * Returns 0 for kernel space and 1 for user space. */ -static inline int user_space_fault(unsigned long trans_exc_code) +static inline int user_space_fault(struct pt_regs *regs) { + unsigned long trans_exc_code; + /* * The lowest two bits of the translation exception * identification indicate which paging table was used. */ - trans_exc_code &= 3; - if (trans_exc_code == 2) - /* Access via secondary space, set_fs setting decides */ + trans_exc_code = regs->int_parm_long & 3; + if (trans_exc_code == 3) /* home space -> kernel */ + return 0; + if (user_mode(regs)) + return 1; + if (trans_exc_code == 2) /* secondary space -> set_fs */ return current->thread.mm_segment.ar4; - /* - * Access via primary space or access register is from user space - * and access via home space is from the kernel. - */ - return trans_exc_code != 3; + if (current->flags & PF_VCPU) + return 1; + return 0; } static inline void report_user_fault(struct pt_regs *regs, long signr) @@ -172,7 +175,7 @@ static noinline void do_no_context(struct pt_regs *regs) * terminate things with extreme prejudice. */ address = regs->int_parm_long & __FAIL_ADDR_MASK; - if (!user_space_fault(regs->int_parm_long)) + if (!user_space_fault(regs)) printk(KERN_ALERT "Unable to handle kernel pointer dereference" " at virtual kernel address %p\n", (void *)address); else @@ -296,7 +299,7 @@ static inline int do_exception(struct pt_regs *regs, int access) * user context. */ fault = VM_FAULT_BADCONTEXT; - if (unlikely(!user_space_fault(trans_exc_code) || in_atomic() || !mm)) + if (unlikely(!user_space_fault(regs) || in_atomic() || !mm)) goto out; address = trans_exc_code & __FAIL_ADDR_MASK; @@ -441,30 +444,6 @@ void __kprobes do_dat_exception(struct pt_regs *regs) do_fault_error(regs, fault); } -int __handle_fault(unsigned long uaddr, unsigned long pgm_int_code, int write) -{ - struct pt_regs regs; - int access, fault; - - /* Emulate a uaccess fault from kernel mode. */ - regs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT | PSW_MASK_MCHECK; - if (!irqs_disabled()) - regs.psw.mask |= PSW_MASK_IO | PSW_MASK_EXT; - regs.psw.addr = (unsigned long) __builtin_return_address(0); - regs.psw.addr |= PSW_ADDR_AMODE; - regs.int_code = pgm_int_code; - regs.int_parm_long = (uaddr & PAGE_MASK) | 2; - access = write ? VM_WRITE : VM_READ; - fault = do_exception(®s, access); - /* - * Since the fault happened in kernel mode while performing a uaccess - * all we need to do now is emulating a fixup in case "fault" is not - * zero. - * For the calling uaccess functions this results always in -EFAULT. - */ - return fault ? -EFAULT : 0; -} - #ifdef CONFIG_PFAULT /* * 'pfault' pseudo page faults routines. @@ -645,7 +624,7 @@ static int __init pfault_irq_init(void) { int rc; - rc = register_external_interrupt(0x2603, pfault_interrupt); + rc = register_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); if (rc) goto out_extint; rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP; @@ -656,7 +635,7 @@ static int __init pfault_irq_init(void) return 0; out_pfault: - unregister_external_interrupt(0x2603, pfault_interrupt); + unregister_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt); out_extint: pfault_disable = 1; return rc; diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c index d261c62..0727a55d 100644 --- a/arch/s390/mm/hugetlbpage.c +++ b/arch/s390/mm/hugetlbpage.c @@ -123,10 +123,7 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, pmd_t *pmdp = (pmd_t *) ptep; pte_t pte = huge_ptep_get(ptep); - if (MACHINE_HAS_IDTE) - __pmd_idte(addr, pmdp); - else - __pmd_csp(pmdp); + pmdp_flush_direct(mm, addr, pmdp); pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY; return pte; } diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index ad446b0..0c1073e 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -124,8 +124,6 @@ void __init paging_init(void) __ctl_load(S390_lowcore.kernel_asce, 13, 13); arch_local_irq_restore(4UL << (BITS_PER_LONG - 8)); - atomic_set(&init_mm.context.attach_count, 1); - sparse_memory_present_with_active_regions(MAX_NUMNODES); sparse_init(); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); @@ -136,6 +134,11 @@ void __init paging_init(void) void __init mem_init(void) { + if (MACHINE_HAS_TLB_LC) + cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); + cpumask_set_cpu(0, mm_cpumask(&init_mm)); + atomic_set(&init_mm.context.attach_count, 1); + max_mapnr = max_low_pfn; high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 5d8324c..d7cfd57 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -54,7 +54,7 @@ static void __crst_table_upgrade(void *arg) struct mm_struct *mm = arg; if (current->active_mm == mm) - update_mm(mm, current); + update_user_asce(mm, 1); __tlb_flush_local(); } @@ -107,8 +107,10 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit) { pgd_t *pgd; - if (current->active_mm == mm) + if (current->active_mm == mm) { + clear_user_asce(mm, 1); __tlb_flush_mm(mm); + } while (mm->context.asce_limit > limit) { pgd = mm->pgd; switch (pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) { @@ -132,7 +134,7 @@ void crst_table_downgrade(struct mm_struct *mm, unsigned long limit) crst_table_free(mm, (unsigned long *) pgd); } if (current->active_mm == mm) - update_mm(mm, current); + update_user_asce(mm, 1); } #endif @@ -198,7 +200,7 @@ static int gmap_unlink_segment(struct gmap *gmap, unsigned long *table) static void gmap_flush_tlb(struct gmap *gmap) { if (MACHINE_HAS_IDTE) - __tlb_flush_idte((unsigned long) gmap->table | + __tlb_flush_asce(gmap->mm, (unsigned long) gmap->table | _ASCE_TYPE_REGION1); else __tlb_flush_global(); @@ -217,7 +219,7 @@ void gmap_free(struct gmap *gmap) /* Flush tlb. */ if (MACHINE_HAS_IDTE) - __tlb_flush_idte((unsigned long) gmap->table | + __tlb_flush_asce(gmap->mm, (unsigned long) gmap->table | _ASCE_TYPE_REGION1); else __tlb_flush_global(); diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index bcfb70b..72b04de 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -138,7 +138,6 @@ static int vmem_add_mem(unsigned long start, unsigned long size, int ro) } ret = 0; out: - flush_tlb_kernel_range(start, end); return ret; } @@ -265,7 +264,6 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) memset((void *)start, 0, end - start); ret = 0; out: - flush_tlb_kernel_range(start, end); return ret; } |