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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_MMU_H_
#define _ASM_POWERPC_BOOK3S_64_MMU_H_
#include <asm/page.h>
#ifndef __ASSEMBLY__
/*
* Page size definition
*
* shift : is the "PAGE_SHIFT" value for that page size
* sllp : is a bit mask with the value of SLB L || LP to be or'ed
* directly to a slbmte "vsid" value
* penc : is the HPTE encoding mask for the "LP" field:
*
*/
struct mmu_psize_def {
unsigned int shift; /* number of bits */
int penc[MMU_PAGE_COUNT]; /* HPTE encoding */
unsigned int tlbiel; /* tlbiel supported for that page size */
unsigned long avpnm; /* bits to mask out in AVPN in the HPTE */
union {
unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */
unsigned long ap; /* Ap encoding used by PowerISA 3.0 */
};
};
extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT];
#endif /* __ASSEMBLY__ */
/* 64-bit classic hash table MMU */
#include <asm/book3s/64/mmu-hash.h>
#ifndef __ASSEMBLY__
/*
* ISA 3.0 partition and process table entry format
*/
struct prtb_entry {
__be64 prtb0;
__be64 prtb1;
};
extern struct prtb_entry *process_tb;
struct patb_entry {
__be64 patb0;
__be64 patb1;
};
extern struct patb_entry *partition_tb;
/* Bits in patb0 field */
#define PATB_HR (1UL << 63)
#define RPDB_MASK 0x0fffffffffffff00UL
#define RPDB_SHIFT (1UL << 8)
#define RTS1_SHIFT 61 /* top 2 bits of radix tree size */
#define RTS1_MASK (3UL << RTS1_SHIFT)
#define RTS2_SHIFT 5 /* bottom 3 bits of radix tree size */
#define RTS2_MASK (7UL << RTS2_SHIFT)
#define RPDS_MASK 0x1f /* root page dir. size field */
/* Bits in patb1 field */
#define PATB_GR (1UL << 63) /* guest uses radix; must match HR */
#define PRTS_MASK 0x1f /* process table size field */
#define PRTB_MASK 0x0ffffffffffff000UL
/* Number of supported PID bits */
extern unsigned int mmu_pid_bits;
/* Base PID to allocate from */
extern unsigned int mmu_base_pid;
/*
* memory block size used with radix translation.
*/
extern unsigned long __ro_after_init radix_mem_block_size;
#define PRTB_SIZE_SHIFT (mmu_pid_bits + 4)
#define PRTB_ENTRIES (1ul << mmu_pid_bits)
/*
* Power9 currently only support 64K partition table size.
*/
#define PATB_SIZE_SHIFT 16
typedef unsigned long mm_context_id_t;
struct spinlock;
/* Maximum possible number of NPUs in a system. */
#define NV_MAX_NPUS 8
typedef struct {
union {
/*
* We use id as the PIDR content for radix. On hash we can use
* more than one id. The extended ids are used when we start
* having address above 512TB. We allocate one extended id
* for each 512TB. The new id is then used with the 49 bit
* EA to build a new VA. We always use ESID_BITS_1T_MASK bits
* from EA and new context ids to build the new VAs.
*/
mm_context_id_t id;
mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE];
};
/* Number of bits in the mm_cpumask */
atomic_t active_cpus;
/* Number of users of the external (Nest) MMU */
atomic_t copros;
/* Number of user space windows opened in process mm_context */
atomic_t vas_windows;
struct hash_mm_context *hash_context;
void __user *vdso;
/*
* pagetable fragment support
*/
void *pte_frag;
void *pmd_frag;
#ifdef CONFIG_SPAPR_TCE_IOMMU
struct list_head iommu_group_mem_list;
#endif
#ifdef CONFIG_PPC_MEM_KEYS
/*
* Each bit represents one protection key.
* bit set -> key allocated
* bit unset -> key available for allocation
*/
u32 pkey_allocation_map;
s16 execute_only_pkey; /* key holding execute-only protection */
#endif
} mm_context_t;
static inline u16 mm_ctx_user_psize(mm_context_t *ctx)
{
return ctx->hash_context->user_psize;
}
static inline void mm_ctx_set_user_psize(mm_context_t *ctx, u16 user_psize)
{
ctx->hash_context->user_psize = user_psize;
}
static inline unsigned char *mm_ctx_low_slices(mm_context_t *ctx)
{
return ctx->hash_context->low_slices_psize;
}
static inline unsigned char *mm_ctx_high_slices(mm_context_t *ctx)
{
return ctx->hash_context->high_slices_psize;
}
static inline unsigned long mm_ctx_slb_addr_limit(mm_context_t *ctx)
{
return ctx->hash_context->slb_addr_limit;
}
static inline void mm_ctx_set_slb_addr_limit(mm_context_t *ctx, unsigned long limit)
{
ctx->hash_context->slb_addr_limit = limit;
}
static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize)
{
#ifdef CONFIG_PPC_64K_PAGES
if (psize == MMU_PAGE_64K)
return &ctx->hash_context->mask_64k;
#endif
#ifdef CONFIG_HUGETLB_PAGE
if (psize == MMU_PAGE_16M)
return &ctx->hash_context->mask_16m;
if (psize == MMU_PAGE_16G)
return &ctx->hash_context->mask_16g;
#endif
BUG_ON(psize != MMU_PAGE_4K);
return &ctx->hash_context->mask_4k;
}
#ifdef CONFIG_PPC_SUBPAGE_PROT
static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx)
{
return ctx->hash_context->spt;
}
#endif
/*
* The current system page and segment sizes
*/
extern int mmu_linear_psize;
extern int mmu_virtual_psize;
extern int mmu_vmalloc_psize;
extern int mmu_vmemmap_psize;
extern int mmu_io_psize;
/* MMU initialization */
void mmu_early_init_devtree(void);
void hash__early_init_devtree(void);
void radix__early_init_devtree(void);
#ifdef CONFIG_PPC_PKEY
void pkey_early_init_devtree(void);
#else
static inline void pkey_early_init_devtree(void) {}
#endif
extern void hash__early_init_mmu(void);
extern void radix__early_init_mmu(void);
static inline void __init early_init_mmu(void)
{
if (radix_enabled())
return radix__early_init_mmu();
return hash__early_init_mmu();
}
extern void hash__early_init_mmu_secondary(void);
extern void radix__early_init_mmu_secondary(void);
static inline void early_init_mmu_secondary(void)
{
if (radix_enabled())
return radix__early_init_mmu_secondary();
return hash__early_init_mmu_secondary();
}
extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base,
phys_addr_t first_memblock_size);
static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base,
phys_addr_t first_memblock_size)
{
/*
* Hash has more strict restrictions. At this point we don't
* know which translations we will pick. Hence go with hash
* restrictions.
*/
return hash__setup_initial_memory_limit(first_memblock_base,
first_memblock_size);
}
#ifdef CONFIG_PPC_PSERIES
extern void radix_init_pseries(void);
#else
static inline void radix_init_pseries(void) { }
#endif
#ifdef CONFIG_HOTPLUG_CPU
#define arch_clear_mm_cpumask_cpu(cpu, mm) \
do { \
if (cpumask_test_cpu(cpu, mm_cpumask(mm))) { \
atomic_dec(&(mm)->context.active_cpus); \
cpumask_clear_cpu(cpu, mm_cpumask(mm)); \
} \
} while (0)
void cleanup_cpu_mmu_context(void);
#endif
static inline int get_user_context(mm_context_t *ctx, unsigned long ea)
{
int index = ea >> MAX_EA_BITS_PER_CONTEXT;
if (likely(index < ARRAY_SIZE(ctx->extended_id)))
return ctx->extended_id[index];
/* should never happen */
WARN_ON(1);
return 0;
}
static inline unsigned long get_user_vsid(mm_context_t *ctx,
unsigned long ea, int ssize)
{
unsigned long context = get_user_context(ctx, ea);
return get_vsid(context, ea, ssize);
}
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */
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