Commit 1ca72129 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

powerpc/mm: Move PTE bits from generic functions to hash64 functions.

functions which operate on pte bits are moved to hash*.h and other
generic functions are moved to pgtable.h
Acked-by: default avatarScott Wood <scottwood@freescale.com>
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 371352ca
...@@ -294,6 +294,189 @@ void pgtable_cache_init(void); ...@@ -294,6 +294,189 @@ void pgtable_cache_init(void);
extern int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep, extern int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep,
pmd_t **pmdp); pmd_t **pmdp);
/* Generic accessors to PTE bits */
static inline int pte_write(pte_t pte) { return !!(pte_val(pte) & _PAGE_RW);}
static inline int pte_dirty(pte_t pte) { return !!(pte_val(pte) & _PAGE_DIRTY); }
static inline int pte_young(pte_t pte) { return !!(pte_val(pte) & _PAGE_ACCESSED); }
static inline int pte_special(pte_t pte) { return !!(pte_val(pte) & _PAGE_SPECIAL); }
static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; }
static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
static inline int pte_present(pte_t pte)
{
return pte_val(pte) & _PAGE_PRESENT;
}
/* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*
* Even if PTEs can be unsigned long long, a PFN is always an unsigned
* long for now.
*/
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
{
return __pte(((pte_basic_t)(pfn) << PTE_RPN_SHIFT) |
pgprot_val(pgprot));
}
static inline unsigned long pte_pfn(pte_t pte)
{
return pte_val(pte) >> PTE_RPN_SHIFT;
}
/* Generic modifiers for PTE bits */
static inline pte_t pte_wrprotect(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_RW);
}
static inline pte_t pte_mkclean(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_DIRTY);
}
static inline pte_t pte_mkold(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
}
static inline pte_t pte_mkwrite(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
static inline pte_t pte_mkdirty(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_DIRTY);
}
static inline pte_t pte_mkyoung(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_ACCESSED);
}
static inline pte_t pte_mkspecial(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_SPECIAL);
}
static inline pte_t pte_mkhuge(pte_t pte)
{
return pte;
}
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
/* This low level function performs the actual PTE insertion
* Setting the PTE depends on the MMU type and other factors. It's
* an horrible mess that I'm not going to try to clean up now but
* I'm keeping it in one place rather than spread around
*/
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, int percpu)
{
#if defined(CONFIG_PPC_STD_MMU_32) && defined(CONFIG_SMP) && !defined(CONFIG_PTE_64BIT)
/* First case is 32-bit Hash MMU in SMP mode with 32-bit PTEs. We use the
* helper pte_update() which does an atomic update. We need to do that
* because a concurrent invalidation can clear _PAGE_HASHPTE. If it's a
* per-CPU PTE such as a kmap_atomic, we do a simple update preserving
* the hash bits instead (ie, same as the non-SMP case)
*/
if (percpu)
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
else
pte_update(ptep, ~_PAGE_HASHPTE, pte_val(pte));
#elif defined(CONFIG_PPC32) && defined(CONFIG_PTE_64BIT)
/* Second case is 32-bit with 64-bit PTE. In this case, we
* can just store as long as we do the two halves in the right order
* with a barrier in between. This is possible because we take care,
* in the hash code, to pre-invalidate if the PTE was already hashed,
* which synchronizes us with any concurrent invalidation.
* In the percpu case, we also fallback to the simple update preserving
* the hash bits
*/
if (percpu) {
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
return;
}
if (pte_val(*ptep) & _PAGE_HASHPTE)
flush_hash_entry(mm, ptep, addr);
__asm__ __volatile__("\
stw%U0%X0 %2,%0\n\
eieio\n\
stw%U0%X0 %L2,%1"
: "=m" (*ptep), "=m" (*((unsigned char *)ptep+4))
: "r" (pte) : "memory");
#elif defined(CONFIG_PPC_STD_MMU_32)
/* Third case is 32-bit hash table in UP mode, we need to preserve
* the _PAGE_HASHPTE bit since we may not have invalidated the previous
* translation in the hash yet (done in a subsequent flush_tlb_xxx())
* and see we need to keep track that this PTE needs invalidating
*/
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
#else
#error "Not supported "
#endif
}
/*
* Macro to mark a page protection value as "uncacheable".
*/
#define _PAGE_CACHE_CTL (_PAGE_COHERENT | _PAGE_GUARDED | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU)
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE | _PAGE_GUARDED);
}
#define pgprot_noncached_wc pgprot_noncached_wc
static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE);
}
#define pgprot_cached pgprot_cached
static inline pgprot_t pgprot_cached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT);
}
#define pgprot_cached_wthru pgprot_cached_wthru
static inline pgprot_t pgprot_cached_wthru(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT | _PAGE_WRITETHRU);
}
#define pgprot_cached_noncoherent pgprot_cached_noncoherent
static inline pgprot_t pgprot_cached_noncoherent(pgprot_t prot)
{
return __pgprot(pgprot_val(prot) & ~_PAGE_CACHE_CTL);
}
#define pgprot_writecombine pgprot_writecombine
static inline pgprot_t pgprot_writecombine(pgprot_t prot)
{
return pgprot_noncached_wc(prot);
}
#endif /* !__ASSEMBLY__ */ #endif /* !__ASSEMBLY__ */
#endif /* _ASM_POWERPC_BOOK3S_32_PGTABLE_H */ #endif /* _ASM_POWERPC_BOOK3S_32_PGTABLE_H */
...@@ -481,6 +481,157 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr, ...@@ -481,6 +481,157 @@ static inline void pmdp_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pmd_hugepage_update(mm, addr, pmdp, _PAGE_RW, 0); pmd_hugepage_update(mm, addr, pmdp, _PAGE_RW, 0);
} }
/* Generic accessors to PTE bits */
static inline int pte_write(pte_t pte) { return !!(pte_val(pte) & _PAGE_RW);}
static inline int pte_dirty(pte_t pte) { return !!(pte_val(pte) & _PAGE_DIRTY); }
static inline int pte_young(pte_t pte) { return !!(pte_val(pte) & _PAGE_ACCESSED); }
static inline int pte_special(pte_t pte) { return !!(pte_val(pte) & _PAGE_SPECIAL); }
static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; }
static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
#ifdef CONFIG_NUMA_BALANCING
/*
* These work without NUMA balancing but the kernel does not care. See the
* comment in include/asm-generic/pgtable.h . On powerpc, this will only
* work for user pages and always return true for kernel pages.
*/
static inline int pte_protnone(pte_t pte)
{
return (pte_val(pte) &
(_PAGE_PRESENT | _PAGE_USER)) == _PAGE_PRESENT;
}
#endif /* CONFIG_NUMA_BALANCING */
static inline int pte_present(pte_t pte)
{
return pte_val(pte) & _PAGE_PRESENT;
}
/* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*
* Even if PTEs can be unsigned long long, a PFN is always an unsigned
* long for now.
*/
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
{
return __pte(((pte_basic_t)(pfn) << PTE_RPN_SHIFT) |
pgprot_val(pgprot));
}
static inline unsigned long pte_pfn(pte_t pte)
{
return pte_val(pte) >> PTE_RPN_SHIFT;
}
/* Generic modifiers for PTE bits */
static inline pte_t pte_wrprotect(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_RW);
}
static inline pte_t pte_mkclean(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_DIRTY);
}
static inline pte_t pte_mkold(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
}
static inline pte_t pte_mkwrite(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
static inline pte_t pte_mkdirty(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_DIRTY);
}
static inline pte_t pte_mkyoung(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_ACCESSED);
}
static inline pte_t pte_mkspecial(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_SPECIAL);
}
static inline pte_t pte_mkhuge(pte_t pte)
{
return pte;
}
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
/* This low level function performs the actual PTE insertion
* Setting the PTE depends on the MMU type and other factors. It's
* an horrible mess that I'm not going to try to clean up now but
* I'm keeping it in one place rather than spread around
*/
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, int percpu)
{
/*
* Anything else just stores the PTE normally. That covers all 64-bit
* cases, and 32-bit non-hash with 32-bit PTEs.
*/
*ptep = pte;
}
/*
* Macro to mark a page protection value as "uncacheable".
*/
#define _PAGE_CACHE_CTL (_PAGE_COHERENT | _PAGE_GUARDED | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU)
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE | _PAGE_GUARDED);
}
#define pgprot_noncached_wc pgprot_noncached_wc
static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE);
}
#define pgprot_cached pgprot_cached
static inline pgprot_t pgprot_cached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT);
}
#define pgprot_cached_wthru pgprot_cached_wthru
static inline pgprot_t pgprot_cached_wthru(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT | _PAGE_WRITETHRU);
}
#define pgprot_cached_noncoherent pgprot_cached_noncoherent
static inline pgprot_t pgprot_cached_noncoherent(pgprot_t prot)
{
return __pgprot(pgprot_val(prot) & ~_PAGE_CACHE_CTL);
}
#define pgprot_writecombine pgprot_writecombine
static inline pgprot_t pgprot_writecombine(pgprot_t prot)
{
return pgprot_noncached_wc(prot);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE #ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr, extern void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, unsigned long old_pmd); pmd_t *pmdp, unsigned long old_pmd);
......
...@@ -201,6 +201,12 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd) ...@@ -201,6 +201,12 @@ static inline pte_t *pmdp_ptep(pmd_t *pmd)
#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd))) #define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd))) #define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd))) #define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
#ifdef CONFIG_NUMA_BALANCING
static inline int pmd_protnone(pmd_t pmd)
{
return pte_protnone(pmd_pte(pmd));
}
#endif /* CONFIG_NUMA_BALANCING */
#define __HAVE_ARCH_PMD_WRITE #define __HAVE_ARCH_PMD_WRITE
#define pmd_write(pmd) pte_write(pmd_pte(pmd)) #define pmd_write(pmd) pte_write(pmd_pte(pmd))
......
...@@ -9,221 +9,17 @@ ...@@ -9,221 +9,17 @@
#define FIRST_USER_ADDRESS 0UL #define FIRST_USER_ADDRESS 0UL
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
/* Generic accessors to PTE bits */
static inline int pte_write(pte_t pte) { return !!(pte_val(pte) & _PAGE_RW);}
static inline int pte_dirty(pte_t pte) { return !!(pte_val(pte) & _PAGE_DIRTY); }
static inline int pte_young(pte_t pte) { return !!(pte_val(pte) & _PAGE_ACCESSED); }
static inline int pte_special(pte_t pte) { return !!(pte_val(pte) & _PAGE_SPECIAL); }
static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; }
static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); }
#ifdef CONFIG_NUMA_BALANCING
/*
* These work without NUMA balancing but the kernel does not care. See the
* comment in include/asm-generic/pgtable.h . On powerpc, this will only
* work for user pages and always return true for kernel pages.
*/
static inline int pte_protnone(pte_t pte)
{
return (pte_val(pte) &
(_PAGE_PRESENT | _PAGE_USER)) == _PAGE_PRESENT;
}
static inline int pmd_protnone(pmd_t pmd)
{
return pte_protnone(pmd_pte(pmd));
}
#endif /* CONFIG_NUMA_BALANCING */
static inline int pte_present(pte_t pte)
{
return pte_val(pte) & _PAGE_PRESENT;
}
/* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
*
* Even if PTEs can be unsigned long long, a PFN is always an unsigned
* long for now.
*/
static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
{
return __pte(((pte_basic_t)(pfn) << PTE_RPN_SHIFT) |
pgprot_val(pgprot));
}
static inline unsigned long pte_pfn(pte_t pte)
{
return pte_val(pte) >> PTE_RPN_SHIFT;
}
/* Generic modifiers for PTE bits */
static inline pte_t pte_wrprotect(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_RW);
}
static inline pte_t pte_mkclean(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_DIRTY);
}
static inline pte_t pte_mkold(pte_t pte)
{
return __pte(pte_val(pte) & ~_PAGE_ACCESSED);
}
static inline pte_t pte_mkwrite(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_RW);
}
static inline pte_t pte_mkdirty(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_DIRTY);
}
static inline pte_t pte_mkyoung(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_ACCESSED);
}
static inline pte_t pte_mkspecial(pte_t pte)
{
return __pte(pte_val(pte) | _PAGE_SPECIAL);
}
static inline pte_t pte_mkhuge(pte_t pte)
{
return pte;
}
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
/* Insert a PTE, top-level function is out of line. It uses an inline /* Insert a PTE, top-level function is out of line. It uses an inline
* low level function in the respective pgtable-* files * low level function in the respective pgtable-* files
*/ */
extern void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, extern void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
pte_t pte); pte_t pte);
/* This low level function performs the actual PTE insertion
* Setting the PTE depends on the MMU type and other factors. It's
* an horrible mess that I'm not going to try to clean up now but
* I'm keeping it in one place rather than spread around
*/
static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, int percpu)
{
#if defined(CONFIG_PPC_STD_MMU_32) && defined(CONFIG_SMP) && !defined(CONFIG_PTE_64BIT)
/* First case is 32-bit Hash MMU in SMP mode with 32-bit PTEs. We use the
* helper pte_update() which does an atomic update. We need to do that
* because a concurrent invalidation can clear _PAGE_HASHPTE. If it's a
* per-CPU PTE such as a kmap_atomic, we do a simple update preserving
* the hash bits instead (ie, same as the non-SMP case)
*/
if (percpu)
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
else
pte_update(ptep, ~_PAGE_HASHPTE, pte_val(pte));
#elif defined(CONFIG_PPC32) && defined(CONFIG_PTE_64BIT)
/* Second case is 32-bit with 64-bit PTE. In this case, we
* can just store as long as we do the two halves in the right order
* with a barrier in between. This is possible because we take care,
* in the hash code, to pre-invalidate if the PTE was already hashed,
* which synchronizes us with any concurrent invalidation.
* In the percpu case, we also fallback to the simple update preserving
* the hash bits
*/
if (percpu) {
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
return;
}
if (pte_val(*ptep) & _PAGE_HASHPTE)
flush_hash_entry(mm, ptep, addr);
__asm__ __volatile__("\
stw%U0%X0 %2,%0\n\
eieio\n\
stw%U0%X0 %L2,%1"
: "=m" (*ptep), "=m" (*((unsigned char *)ptep+4))
: "r" (pte) : "memory");
#elif defined(CONFIG_PPC_STD_MMU_32)
/* Third case is 32-bit hash table in UP mode, we need to preserve
* the _PAGE_HASHPTE bit since we may not have invalidated the previous
* translation in the hash yet (done in a subsequent flush_tlb_xxx())
* and see we need to keep track that this PTE needs invalidating
*/
*ptep = __pte((pte_val(*ptep) & _PAGE_HASHPTE)
| (pte_val(pte) & ~_PAGE_HASHPTE));
#else
/* Anything else just stores the PTE normally. That covers all 64-bit
* cases, and 32-bit non-hash with 32-bit PTEs.
*/
*ptep = pte;
#endif
}
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address, extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep, pte_t entry, int dirty); pte_t *ptep, pte_t entry, int dirty);
/*
* Macro to mark a page protection value as "uncacheable".
*/
#define _PAGE_CACHE_CTL (_PAGE_COHERENT | _PAGE_GUARDED | _PAGE_NO_CACHE | \
_PAGE_WRITETHRU)
#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE | _PAGE_GUARDED);
}
#define pgprot_noncached_wc pgprot_noncached_wc
static inline pgprot_t pgprot_noncached_wc(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_NO_CACHE);
}
#define pgprot_cached pgprot_cached
static inline pgprot_t pgprot_cached(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT);
}
#define pgprot_cached_wthru pgprot_cached_wthru
static inline pgprot_t pgprot_cached_wthru(pgprot_t prot)
{
return __pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) |
_PAGE_COHERENT | _PAGE_WRITETHRU);
}
#define pgprot_cached_noncoherent pgprot_cached_noncoherent
static inline pgprot_t pgprot_cached_noncoherent(pgprot_t prot)
{
return __pgprot(pgprot_val(prot) & ~_PAGE_CACHE_CTL);
}
#define pgprot_writecombine pgprot_writecombine
static inline pgprot_t pgprot_writecombine(pgprot_t prot)
{
return pgprot_noncached_wc(prot);
}
struct file; struct file;
extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot); unsigned long size, pgprot_t vma_prot);
......
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