diff options
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash.h | 34 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable.h | 18 |
2 files changed, 34 insertions, 18 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index fb76f9cf49c9..5e7e74d30eb9 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -20,7 +20,7 @@ #define _PAGE_READ 0x00004 /* read access allowed */ #define _PAGE_RW (_PAGE_READ | _PAGE_WRITE) #define _PAGE_RWX (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC) -#define _PAGE_USER 0x00008 /* page may be accessed by userspace */ +#define _PAGE_PRIVILEGED 0x00008 /* kernel access only */ #define _PAGE_GUARDED 0x00010 /* G: guarded (side-effect) page */ /* M (memory coherence) is always set in the HPTE, so we don't need it here */ #define _PAGE_COHERENT 0x0 @@ -114,10 +114,13 @@ #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN #endif /* CONFIG_PPC_MM_SLICES */ -/* No separate kernel read-only */ -#define _PAGE_KERNEL_RW (_PAGE_RW | _PAGE_DIRTY) /* user access blocked by key */ +/* + * No separate kernel read-only, user access blocked by key + */ +#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_RW | _PAGE_DIRTY) #define _PAGE_KERNEL_RO _PAGE_KERNEL_RW -#define _PAGE_KERNEL_RWX (_PAGE_DIRTY | _PAGE_RW | _PAGE_EXEC) +#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | \ + _PAGE_RW | _PAGE_EXEC) /* Strong Access Ordering */ #define _PAGE_SAO (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT) @@ -147,7 +150,7 @@ */ #define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_COHERENT | _PAGE_NO_CACHE | \ _PAGE_WRITETHRU | _PAGE_4K_PFN | \ - _PAGE_USER | _PAGE_ACCESSED | _PAGE_READ |\ + _PAGE_PRIVILEGED | _PAGE_ACCESSED | _PAGE_READ |\ _PAGE_WRITE | _PAGE_DIRTY | _PAGE_EXEC | \ _PAGE_SOFT_DIRTY) /* @@ -169,16 +172,13 @@ * * Note due to the way vm flags are laid out, the bits are XWR */ -#define PAGE_NONE __pgprot(_PAGE_BASE) -#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW) -#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | \ - _PAGE_EXEC) -#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_READ) -#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_READ| \ - _PAGE_EXEC) -#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_READ) -#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_READ| \ - _PAGE_EXEC) +#define PAGE_NONE __pgprot(_PAGE_BASE | _PAGE_PRIVILEGED) +#define PAGE_SHARED __pgprot(_PAGE_BASE | _PAGE_RW) +#define PAGE_SHARED_X __pgprot(_PAGE_BASE | _PAGE_RW | _PAGE_EXEC) +#define PAGE_COPY __pgprot(_PAGE_BASE | _PAGE_READ) +#define PAGE_COPY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) +#define PAGE_READONLY __pgprot(_PAGE_BASE | _PAGE_READ) +#define PAGE_READONLY_X __pgprot(_PAGE_BASE | _PAGE_READ | _PAGE_EXEC) #define __P000 PAGE_NONE #define __P001 PAGE_READONLY @@ -419,8 +419,8 @@ static inline pte_t pte_clear_soft_dirty(pte_t pte) */ static inline int pte_protnone(pte_t pte) { - return (pte_val(pte) & - (_PAGE_PRESENT | _PAGE_USER)) == _PAGE_PRESENT; + return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PRIVILEGED)) == + (_PAGE_PRESENT | _PAGE_PRIVILEGED); } #endif /* CONFIG_NUMA_BALANCING */ diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index 60e84260a07d..b609729e0d76 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -187,7 +187,7 @@ extern struct page *pgd_page(pgd_t pgd); static inline bool pte_user(pte_t pte) { - return !!(pte_val(pte) & _PAGE_USER); + return !(pte_val(pte) & _PAGE_PRIVILEGED); } #ifdef CONFIG_MEM_SOFT_DIRTY @@ -211,6 +211,22 @@ static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) } #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ +static inline bool check_pte_access(unsigned long access, unsigned long ptev) +{ + /* + * This check for _PAGE_RWX and _PAGE_PRESENT bits + */ + if (access & ~ptev) + return false; + /* + * This check for access to privilege space + */ + if ((access & _PAGE_PRIVILEGED) != (ptev & _PAGE_PRIVILEGED)) + return false; + + return true; +} + void pgtable_cache_add(unsigned shift, void (*ctor)(void *)); void pgtable_cache_init(void); |