diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgtable.h')
-rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 156 |
1 files changed, 115 insertions, 41 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index 0e4ec8cc37b7..9224f23065ff 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -20,32 +20,46 @@ struct mm_struct; #include <asm/nohash/pgtable.h> #endif /* !CONFIG_PPC_BOOK3S */ -/* Note due to the way vm flags are laid out, the bits are XWR */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_X -#define __P101 PAGE_READONLY_X -#define __P110 PAGE_COPY_X -#define __P111 PAGE_COPY_X - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_X -#define __S101 PAGE_READONLY_X -#define __S110 PAGE_SHARED_X -#define __S111 PAGE_SHARED_X +/* + * Protection used for kernel text. We want the debuggers to be able to + * set breakpoints anywhere, so don't write protect the kernel text + * on platforms where such control is possible. + */ +#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \ + defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) +#define PAGE_KERNEL_TEXT PAGE_KERNEL_X +#else +#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX +#endif + +/* Make modules code happy. We don't set RO yet */ +#define PAGE_KERNEL_EXEC PAGE_KERNEL_X + +/* Advertise special mapping type for AGP */ +#define PAGE_AGP (PAGE_KERNEL_NC) +#define HAVE_PAGE_AGP #ifndef __ASSEMBLY__ -#include <asm/tlbflush.h> +void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, + pte_t pte, unsigned int nr); +#define set_ptes set_ptes +#define update_mmu_cache(vma, addr, ptep) \ + update_mmu_cache_range(NULL, vma, addr, ptep, 1) + +#ifndef MAX_PTRS_PER_PGD +#define MAX_PTRS_PER_PGD PTRS_PER_PGD +#endif /* Keep these as a macros to avoid include dependency mess */ #define pte_page(x) pfn_to_page(pte_pfn(x)) #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) + +static inline unsigned long pte_pfn(pte_t pte) +{ + return (pte_val(pte) & PTE_RPN_MASK) >> PTE_RPN_SHIFT; +} + /* * Select all bits except the pfn */ @@ -57,6 +71,19 @@ static inline pgprot_t pte_pgprot(pte_t pte) return __pgprot(pte_flags); } +static inline pgprot_t pgprot_nx(pgprot_t prot) +{ + return pte_pgprot(pte_exprotect(__pte(pgprot_val(prot)))); +} +#define pgprot_nx pgprot_nx + +#ifndef pmd_page_vaddr +static inline const void *pmd_page_vaddr(pmd_t pmd) +{ + return __va(pmd_val(pmd) & ~PMD_MASKED_BITS); +} +#define pmd_page_vaddr pmd_page_vaddr +#endif /* * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. @@ -67,17 +94,10 @@ extern unsigned long empty_zero_page[]; extern pgd_t swapper_pg_dir[]; extern void paging_init(void); +void poking_init(void); extern unsigned long ioremap_bot; - -/* - * kern_addr_valid is intended to indicate whether an address is a valid - * kernel address. Most 32-bit archs define it as always true (like this) - * but most 64-bit archs actually perform a test. What should we do here? - */ -#define kern_addr_valid(addr) (1) - -#include <asm-generic/pgtable.h> +extern const pgprot_t protection_map[16]; #ifndef CONFIG_TRANSPARENT_HUGEPAGE #define pmd_large(pmd) 0 @@ -88,17 +108,48 @@ unsigned long vmalloc_to_phys(void *vmalloc_addr); void pgtable_cache_add(unsigned int shift); +pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); + #if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) void mark_initmem_nx(void); #else static inline void mark_initmem_nx(void) { } #endif -#ifdef CONFIG_PPC_DEBUG_WX -void ptdump_check_wx(void); -#else -static inline void ptdump_check_wx(void) { } -#endif +#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS +int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long address, + pte_t *ptep, pte_t entry, int dirty); + +pgprot_t __phys_mem_access_prot(unsigned long pfn, unsigned long size, + pgprot_t vma_prot); + +struct file; +static inline pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, + unsigned long size, pgprot_t vma_prot) +{ + return __phys_mem_access_prot(pfn, size, vma_prot); +} +#define __HAVE_PHYS_MEM_ACCESS_PROT + +void __update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep); + +/* + * This gets called at the end of handling a page fault, when + * the kernel has put a new PTE into the page table for the process. + * We use it to ensure coherency between the i-cache and d-cache + * for the page which has just been mapped in. + * On machines which use an MMU hash table, we use this to put a + * corresponding HPTE into the hash table ahead of time, instead of + * waiting for the inevitable extra hash-table miss exception. + */ +static inline void update_mmu_cache_range(struct vm_fault *vmf, + struct vm_area_struct *vma, unsigned long address, + pte_t *ptep, unsigned int nr) +{ + if ((mmu_has_feature(MMU_FTR_HPTE_TABLE) && !radix_enabled()) || + (IS_ENABLED(CONFIG_PPC_E500) && IS_ENABLED(CONFIG_HUGETLB_PAGE))) + __update_mmu_cache(vma, address, ptep); +} /* * When used, PTE_FRAG_NR is defined in subarch pgtable.h @@ -145,22 +196,45 @@ static inline bool pud_is_leaf(pud_t pud) } #endif -#ifndef pgd_is_leaf -#define pgd_is_leaf pgd_is_leaf -static inline bool pgd_is_leaf(pgd_t pgd) +#ifndef p4d_is_leaf +#define p4d_is_leaf p4d_is_leaf +static inline bool p4d_is_leaf(p4d_t p4d) { return false; } #endif -#ifdef CONFIG_PPC64 -#define is_ioremap_addr is_ioremap_addr -static inline bool is_ioremap_addr(const void *x) +#define pmd_pgtable pmd_pgtable +static inline pgtable_t pmd_pgtable(pmd_t pmd) { - unsigned long addr = (unsigned long)x; + return (pgtable_t)pmd_page_vaddr(pmd); +} - return addr >= IOREMAP_BASE && addr < IOREMAP_END; +#ifdef CONFIG_PPC64 +int __meminit vmemmap_populated(unsigned long vmemmap_addr, int vmemmap_map_size); +bool altmap_cross_boundary(struct vmem_altmap *altmap, unsigned long start, + unsigned long page_size); +/* + * mm/memory_hotplug.c:mhp_supports_memmap_on_memory goes into details + * some of the restrictions. We don't check for PMD_SIZE because our + * vmemmap allocation code can fallback correctly. The pageblock + * alignment requirement is met using altmap->reserve blocks. + */ +#define arch_supports_memmap_on_memory arch_supports_memmap_on_memory +static inline bool arch_supports_memmap_on_memory(unsigned long vmemmap_size) +{ + if (!radix_enabled()) + return false; + /* + * With 4K page size and 2M PMD_SIZE, we can align + * things better with memory block size value + * starting from 128MB. Hence align things with PMD_SIZE. + */ + if (IS_ENABLED(CONFIG_PPC_4K_PAGES)) + return IS_ALIGNED(vmemmap_size, PMD_SIZE); + return true; } + #endif /* CONFIG_PPC64 */ #endif /* __ASSEMBLY__ */ |