Release 4.7 arch/s390/include/asm/mmu_context.h
/*
* S390 version
*
* Derived from "include/asm-i386/mmu_context.h"
*/
#ifndef __S390_MMU_CONTEXT_H
#define __S390_MMU_CONTEXT_H
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/tlbflush.h>
#include <asm/ctl_reg.h>
static inline int init_new_context(struct task_struct *tsk,
struct mm_struct *mm)
{
spin_lock_init(&mm->context.list_lock);
INIT_LIST_HEAD(&mm->context.pgtable_list);
INIT_LIST_HEAD(&mm->context.gmap_list);
cpumask_clear(&mm->context.cpu_attach_mask);
atomic_set(&mm->context.attach_count, 0);
mm->context.flush_mm = 0;
#ifdef CONFIG_PGSTE
mm->context.alloc_pgste = page_table_allocate_pgste;
mm->context.has_pgste = 0;
mm->context.use_skey = 0;
#endif
switch (mm->context.asce_limit) {
case 1UL << 42:
/*
* forked 3-level task, fall through to set new asce with new
* mm->pgd
*/
case 0:
/* context created by exec, set asce limit to 4TB */
mm->context.asce_limit = STACK_TOP_MAX;
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION3;
break;
case 1UL << 53:
/* forked 4-level task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION2;
break;
case 1UL << 31:
/* forked 2-level compat task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
/* pgd_alloc() did not increase mm->nr_pmds */
mm_inc_nr_pmds(mm);
}
crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 140 | 60.61% | 7 | 58.33% |
| gerald schaefer | gerald schaefer | 69 | 29.87% | 1 | 8.33% |
| dominik dingel | dominik dingel | 8 | 3.46% | 2 | 16.67% |
| christian borntraeger | christian borntraeger | 8 | 3.46% | 1 | 8.33% |
| pre-git | pre-git | 6 | 2.60% | 1 | 8.33% |
| Total | 231 | 100.00% | 12 | 100.00% |
#define destroy_context(mm) do { } while (0)
static inline void set_user_asce(struct mm_struct *mm)
{
S390_lowcore.user_asce = mm->context.asce;
if (current->thread.mm_segment.ar4)
__ctl_load(S390_lowcore.user_asce, 7, 7);
set_cpu_flag(CIF_ASCE);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 31 | 64.58% | 6 | 66.67% |
| pre-git | pre-git | 13 | 27.08% | 1 | 11.11% |
| andrew morton | andrew morton | 3 | 6.25% | 1 | 11.11% |
| gerald schaefer | gerald schaefer | 1 | 2.08% | 1 | 11.11% |
| Total | 48 | 100.00% | 9 | 100.00% |
static inline void clear_user_asce(void)
{
S390_lowcore.user_asce = S390_lowcore.kernel_asce;
__ctl_load(S390_lowcore.user_asce, 1, 1);
__ctl_load(S390_lowcore.user_asce, 7, 7);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| heiko carstens | heiko carstens | 23 | 58.97% | 1 | 33.33% |
| martin schwidefsky | martin schwidefsky | 16 | 41.03% | 2 | 66.67% |
| Total | 39 | 100.00% | 3 | 100.00% |
static inline void load_kernel_asce(void)
{
unsigned long asce;
__ctl_store(asce, 1, 1);
if (asce != S390_lowcore.kernel_asce)
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
set_cpu_flag(CIF_ASCE);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| heiko carstens | heiko carstens | 41 | 89.13% | 1 | 25.00% |
| martin schwidefsky | martin schwidefsky | 5 | 10.87% | 3 | 75.00% |
| Total | 46 | 100.00% | 4 | 100.00% |
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
int cpu = smp_processor_id();
S390_lowcore.user_asce = next->context.asce;
if (prev == next)
return;
if (MACHINE_HAS_TLB_LC)
cpumask_set_cpu(cpu, &next->context.cpu_attach_mask);
/* Clear old ASCE by loading the kernel ASCE. */
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
atomic_inc(&next->context.attach_count);
atomic_dec(&prev->context.attach_count);
if (MACHINE_HAS_TLB_LC)
cpumask_clear_cpu(cpu, &prev->context.cpu_attach_mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 114 | 95.00% | 7 | 63.64% |
| rusty russell | rusty russell | 2 | 1.67% | 1 | 9.09% |
| heiko carstens | heiko carstens | 2 | 1.67% | 1 | 9.09% |
| gerald schaefer | gerald schaefer | 1 | 0.83% | 1 | 9.09% |
| pre-git | pre-git | 1 | 0.83% | 1 | 9.09% |
| Total | 120 | 100.00% | 11 | 100.00% |
#define finish_arch_post_lock_switch finish_arch_post_lock_switch
static inline void finish_arch_post_lock_switch(void)
{
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
load_kernel_asce();
if (mm) {
preempt_disable();
while (atomic_read(&mm->context.attach_count) >> 16)
cpu_relax();
cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
if (mm->context.flush_mm)
__tlb_flush_mm(mm);
preempt_enable();
}
set_fs(current->thread.mm_segment);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 89 | 98.89% | 4 | 80.00% |
| pre-git | pre-git | 1 | 1.11% | 1 | 20.00% |
| Total | 90 | 100.00% | 5 | 100.00% |
#define enter_lazy_tlb(mm,tsk) do { } while (0)
#define deactivate_mm(tsk,mm) do { } while (0)
static inline void activate_mm(struct mm_struct *prev,
struct mm_struct *next)
{
switch_mm(prev, next, current);
cpumask_set_cpu(smp_processor_id(), mm_cpumask(next));
set_user_asce(next);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pre-git | pre-git | 25 | 59.52% | 1 | 33.33% |
| martin schwidefsky | martin schwidefsky | 16 | 38.10% | 1 | 33.33% |
| adrian bunk | adrian bunk | 1 | 2.38% | 1 | 33.33% |
| Total | 42 | 100.00% | 3 | 100.00% |
static inline void arch_dup_mmap(struct mm_struct *oldmm,
struct mm_struct *mm)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 16 | 100.00% | 2 | 100.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
static inline void arch_exit_mmap(struct mm_struct *mm)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void arch_unmap(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave hansen | dave hansen | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave hansen | dave hansen | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign)
{
/* by default, allow everything */
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave hansen | dave hansen | 25 | 100.00% | 3 | 100.00% |
| Total | 25 | 100.00% | 3 | 100.00% |
static inline bool arch_pte_access_permitted(pte_t pte, bool write)
{
/* by default, allow everything */
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| dave hansen | dave hansen | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
#endif /* __S390_MMU_CONTEXT_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| martin schwidefsky | martin schwidefsky | 457 | 58.89% | 15 | 44.12% |
| dave hansen | dave hansen | 82 | 10.57% | 4 | 11.76% |
| gerald schaefer | gerald schaefer | 75 | 9.66% | 2 | 5.88% |
| heiko carstens | heiko carstens | 67 | 8.63% | 2 | 5.88% |
| pre-git | pre-git | 60 | 7.73% | 1 | 2.94% |
| linus torvalds | linus torvalds | 9 | 1.16% | 1 | 2.94% |
| christian borntraeger | christian borntraeger | 8 | 1.03% | 1 | 2.94% |
| dominik dingel | dominik dingel | 8 | 1.03% | 2 | 5.88% |
| andrew morton | andrew morton | 4 | 0.52% | 2 | 5.88% |
| jeremy fitzhardinge | jeremy fitzhardinge | 2 | 0.26% | 1 | 2.94% |
| rusty russell | rusty russell | 2 | 0.26% | 1 | 2.94% |
| david howells | david howells | 1 | 0.13% | 1 | 2.94% |
| adrian bunk | adrian bunk | 1 | 0.13% | 1 | 2.94% |
| Total | 776 | 100.00% | 34 | 100.00% |
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