diff options
Diffstat (limited to 'arch/s390/include/asm')
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/asm/mmu.h | 4 | ||||
| -rw-r--r-- | arch/s390/include/asm/pgalloc.h | 7 | ||||
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 42 | ||||
| -rw-r--r-- | arch/s390/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/s390/include/asm/tlbflush.h | 2 |
6 files changed, 52 insertions, 6 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index 228cf0b295db..f26280d9e88d 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -268,7 +268,7 @@ struct _lowcore { __u64 vdso_per_cpu_data; /* 0x0358 */ __u64 machine_flags; /* 0x0360 */ __u64 ftrace_func; /* 0x0368 */ - __u64 sie_hook; /* 0x0370 */ + __u64 gmap; /* 0x0370 */ __u64 cmf_hpp; /* 0x0378 */ /* Interrupt response block. */ diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index 82d0847896a0..4506791adcd5 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -6,6 +6,7 @@ typedef struct { unsigned int flush_mm; spinlock_t list_lock; struct list_head pgtable_list; + struct list_head gmap_list; unsigned long asce_bits; unsigned long asce_limit; unsigned long vdso_base; @@ -17,6 +18,7 @@ typedef struct { #define INIT_MM_CONTEXT(name) \ .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ - .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), + .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ + .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), #endif diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index 38e71ebcd3c2..8eef9b5b3cf4 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -20,7 +20,7 @@ unsigned long *crst_table_alloc(struct mm_struct *); void crst_table_free(struct mm_struct *, unsigned long *); -unsigned long *page_table_alloc(struct mm_struct *); +unsigned long *page_table_alloc(struct mm_struct *, unsigned long); void page_table_free(struct mm_struct *, unsigned long *); #ifdef CONFIG_HAVE_RCU_TABLE_FREE void page_table_free_rcu(struct mmu_gather *, unsigned long *); @@ -115,6 +115,7 @@ static inline pgd_t *pgd_alloc(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); return (pgd_t *) crst_table_alloc(mm); } #define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd) @@ -133,8 +134,8 @@ static inline void pmd_populate(struct mm_struct *mm, /* * page table entry allocation/free routines. */ -#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) -#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) +#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr)) +#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr)) #define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte) #define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 801fbe1d837d..519eb5f187ef 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -654,6 +654,48 @@ static inline void pgste_set_pte(pte_t *ptep, pgste_t pgste) #endif } +/** + * struct gmap_struct - guest address space + * @mm: pointer to the parent mm_struct + * @table: pointer to the page directory + * @crst_list: list of all crst tables used in the guest address space + */ +struct gmap { + struct list_head list; + struct mm_struct *mm; + unsigned long *table; + struct list_head crst_list; +}; + +/** + * struct gmap_rmap - reverse mapping for segment table entries + * @next: pointer to the next gmap_rmap structure in the list + * @entry: pointer to a segment table entry + */ +struct gmap_rmap { + struct list_head list; + unsigned long *entry; +}; + +/** + * struct gmap_pgtable - gmap information attached to a page table + * @vmaddr: address of the 1MB segment in the process virtual memory + * @mapper: list of segment table entries maping a page table + */ +struct gmap_pgtable { + unsigned long vmaddr; + struct list_head mapper; +}; + +struct gmap *gmap_alloc(struct mm_struct *mm); +void gmap_free(struct gmap *gmap); +void gmap_enable(struct gmap *gmap); +void gmap_disable(struct gmap *gmap); +int gmap_map_segment(struct gmap *gmap, unsigned long from, + unsigned long to, unsigned long length); +int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len); +unsigned long gmap_fault(unsigned long address, struct gmap *); + /* * Certain architectures need to do special things when PTEs * within a page table are directly modified. Thus, the following diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 1300c3025334..55dfcc8bdc0d 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -80,6 +80,7 @@ struct thread_struct { mm_segment_t mm_segment; unsigned long prot_addr; /* address of protection-excep. */ unsigned int trap_no; + unsigned long gmap_addr; /* address of last gmap fault. */ struct per_regs per_user; /* User specified PER registers */ struct per_event per_event; /* Cause of the last PER trap */ /* pfault_wait is used to block the process on a pfault event */ diff --git a/arch/s390/include/asm/tlbflush.h b/arch/s390/include/asm/tlbflush.h index b7a4f2eb0057..304445382382 100644 --- a/arch/s390/include/asm/tlbflush.h +++ b/arch/s390/include/asm/tlbflush.h @@ -80,7 +80,7 @@ static inline void __tlb_flush_mm(struct mm_struct * mm) * on all cpus instead of doing a local flush if the mm * only ran on the local cpu. */ - if (MACHINE_HAS_IDTE) + if (MACHINE_HAS_IDTE && list_empty(&mm->context.gmap_list)) __tlb_flush_idte((unsigned long) mm->pgd | mm->context.asce_bits); else |