Release 4.11 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 <linux/uaccess.h>
#include <linux/mm_types.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.pgtable_lock);
INIT_LIST_HEAD(&mm->context.pgtable_list);
spin_lock_init(&mm->context.gmap_lock);
INIT_LIST_HEAD(&mm->context.gmap_list);
cpumask_clear(&mm->context.cpu_attach_mask);
atomic_set(&mm->context.flush_count, 0);
mm->context.gmap_asce = 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 | 158 | 63.45% | 10 | 66.67% |
| Gerald Schaefer | 69 | 27.71% | 1 | 6.67% |
| Christian Bornträger | 8 | 3.21% | 1 | 6.67% |
| Dominik Dingel | 8 | 3.21% | 2 | 13.33% |
| Linus Torvalds (pre-git) | 6 | 2.41% | 1 | 6.67% |
| Total | 249 | 100.00% | 15 | 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_PRIMARY);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Martin Schwidefsky | 30 | 62.50% | 6 | 60.00% |
| Linus Torvalds (pre-git) | 13 | 27.08% | 1 | 10.00% |
| Andrew Morton | 3 | 6.25% | 1 | 10.00% |
| Heiko Carstens | 1 | 2.08% | 1 | 10.00% |
| Gerald Schaefer | 1 | 2.08% | 1 | 10.00% |
| Total | 48 | 100.00% | 10 | 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 | 23 | 58.97% | 1 | 33.33% |
| 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_PRIMARY);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Heiko Carstens | 42 | 91.30% | 2 | 40.00% |
| Martin Schwidefsky | 4 | 8.70% | 3 | 60.00% |
| Total | 46 | 100.00% | 5 | 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;
cpumask_set_cpu(cpu, &next->context.cpu_attach_mask);
cpumask_set_cpu(cpu, mm_cpumask(next));
/* Clear old ASCE by loading the kernel ASCE. */
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
cpumask_clear_cpu(cpu, &prev->context.cpu_attach_mask);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Martin Schwidefsky | 96 | 94.12% | 7 | 63.64% |
| Rusty Russell | 2 | 1.96% | 1 | 9.09% |
| Heiko Carstens | 2 | 1.96% | 1 | 9.09% |
| Gerald Schaefer | 1 | 0.98% | 1 | 9.09% |
| Linus Torvalds (pre-git) | 1 | 0.98% | 1 | 9.09% |
| Total | 102 | 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.flush_count))
cpu_relax();
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 | 76 | 98.70% | 5 | 83.33% |
| Linus Torvalds (pre-git) | 1 | 1.30% | 1 | 16.67% |
| Total | 77 | 100.00% | 6 | 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);
set_user_asce(next);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 25 | 80.65% | 1 | 33.33% |
| Martin Schwidefsky | 5 | 16.13% | 1 | 33.33% |
| Adrian Bunk | 1 | 3.23% | 1 | 33.33% |
| Total | 31 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 430 | 56.95% | 18 | 45.00% |
| Dave Hansen | 82 | 10.86% | 4 | 10.00% |
| Gerald Schaefer | 75 | 9.93% | 2 | 5.00% |
| Heiko Carstens | 69 | 9.14% | 3 | 7.50% |
| Linus Torvalds (pre-git) | 60 | 7.95% | 1 | 2.50% |
| Linus Torvalds | 10 | 1.32% | 2 | 5.00% |
| Dominik Dingel | 8 | 1.06% | 2 | 5.00% |
| Christian Bornträger | 8 | 1.06% | 1 | 2.50% |
| Andrew Morton | 4 | 0.53% | 2 | 5.00% |
| Ingo Molnar | 3 | 0.40% | 1 | 2.50% |
| Jeremy Fitzhardinge | 2 | 0.26% | 1 | 2.50% |
| Rusty Russell | 2 | 0.26% | 1 | 2.50% |
| Adrian Bunk | 1 | 0.13% | 1 | 2.50% |
| David Howells | 1 | 0.13% | 1 | 2.50% |
| Total | 755 | 100.00% | 40 | 100.00% |
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