diff options
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_hugepage.c | 15 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_utils.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_pgtable.c | 14 | ||||
| -rw-r--r-- | arch/powerpc/mm/drmem.c | 10 | ||||
| -rw-r--r-- | arch/powerpc/mm/mmu_decl.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/numa.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/mm/pageattr.c | 28 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 15 |
8 files changed, 47 insertions, 46 deletions
diff --git a/arch/powerpc/mm/book3s64/hash_hugepage.c b/arch/powerpc/mm/book3s64/hash_hugepage.c index c0fabe6c5a12..15d6f3ea7178 100644 --- a/arch/powerpc/mm/book3s64/hash_hugepage.c +++ b/arch/powerpc/mm/book3s64/hash_hugepage.c @@ -59,16 +59,13 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid, rflags = htab_convert_pte_flags(new_pmd, flags); -#if 0 - if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) { + /* + * THPs are only supported on platforms that can do mixed page size + * segments (MPSS) and all such platforms have coherent icache. Hence we + * don't need to do lazy icache flush (hash_page_do_lazy_icache()) on + * noexecute fault. + */ - /* - * No CPU has hugepages but lacks no execute, so we - * don't need to worry about that case - */ - rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap); - } -#endif /* * Find the slot index details for this ea, using base page size. */ diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index 0626a25b0d72..01c3b4b65241 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -2172,7 +2172,7 @@ static void kernel_unmap_linear_page(unsigned long vaddr, unsigned long lmi) mmu_kernel_ssize, 0); } -void hash__kernel_map_pages(struct page *page, int numpages, int enable) +int hash__kernel_map_pages(struct page *page, int numpages, int enable) { unsigned long flags, vaddr, lmi; int i; @@ -2189,6 +2189,7 @@ void hash__kernel_map_pages(struct page *page, int numpages, int enable) kernel_unmap_linear_page(vaddr, lmi); } local_irq_restore(flags); + return 0; } #endif /* CONFIG_DEBUG_PAGEALLOC || CONFIG_KFENCE */ diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 5cc4008329be..15e88f1439ec 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -1339,20 +1339,6 @@ void __ref radix__vmemmap_free(unsigned long start, unsigned long end, #endif #endif -#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE) -void radix__kernel_map_pages(struct page *page, int numpages, int enable) -{ - unsigned long addr; - - addr = (unsigned long)page_address(page); - - if (enable) - set_memory_p(addr, numpages); - else - set_memory_np(addr, numpages); -} -#endif - #ifdef CONFIG_TRANSPARENT_HUGEPAGE unsigned long radix__pmd_hugepage_update(struct mm_struct *mm, unsigned long addr, diff --git a/arch/powerpc/mm/drmem.c b/arch/powerpc/mm/drmem.c index fde7790277f7..c110ab8fa8a3 100644 --- a/arch/powerpc/mm/drmem.c +++ b/arch/powerpc/mm/drmem.c @@ -393,17 +393,17 @@ static const __be32 *of_get_usable_memory(struct device_node *dn) int walk_drmem_lmbs(struct device_node *dn, void *data, int (*func)(struct drmem_lmb *, const __be32 **, void *)) { + struct device_node *root = of_find_node_by_path("/"); const __be32 *prop, *usm; int ret = -ENODEV; - if (!of_root) + if (!root) return ret; /* Get the address & size cells */ - of_node_get(of_root); - n_root_addr_cells = of_n_addr_cells(of_root); - n_root_size_cells = of_n_size_cells(of_root); - of_node_put(of_root); + n_root_addr_cells = of_n_addr_cells(root); + n_root_size_cells = of_n_size_cells(root); + of_node_put(root); if (init_drmem_lmb_size(dn)) return ret; diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index 90dcc2844056..8e84bc214d13 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -180,3 +180,5 @@ static inline bool debug_pagealloc_enabled_or_kfence(void) int create_section_mapping(unsigned long start, unsigned long end, int nid, pgprot_t prot); #endif + +int hash__kernel_map_pages(struct page *page, int numpages, int enable); diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index f6c4ace3b221..a490724e84ad 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1111,7 +1111,7 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn) static void __init find_possible_nodes(void) { - struct device_node *rtas; + struct device_node *rtas, *root; const __be32 *domains = NULL; int prop_length, max_nodes; u32 i; @@ -1132,10 +1132,12 @@ static void __init find_possible_nodes(void) * If the LPAR is migratable, new nodes might be activated after a LPM, * so we should consider the max number in that case. */ - if (!of_get_property(of_root, "ibm,migratable-partition", NULL)) + root = of_find_node_by_path("/"); + if (!of_get_property(root, "ibm,migratable-partition", NULL)) domains = of_get_property(rtas, "ibm,current-associativity-domains", &prop_length); + of_node_put(root); if (!domains) { domains = of_get_property(rtas, "ibm,max-associativity-domains", &prop_length); diff --git a/arch/powerpc/mm/pageattr.c b/arch/powerpc/mm/pageattr.c index 6163e484bc6d..ac22bf28086f 100644 --- a/arch/powerpc/mm/pageattr.c +++ b/arch/powerpc/mm/pageattr.c @@ -14,6 +14,7 @@ #include <asm/page.h> #include <asm/pgtable.h> +#include <mm/mmu_decl.h> static pte_basic_t pte_update_delta(pte_t *ptep, unsigned long addr, unsigned long old, unsigned long new) @@ -38,6 +39,10 @@ static int change_page_attr(pte_t *ptep, unsigned long addr, void *data) /* Don't clear DIRTY bit */ pte_update_delta(ptep, addr, _PAGE_KERNEL_RW & ~_PAGE_DIRTY, _PAGE_KERNEL_RO); break; + case SET_MEMORY_ROX: + /* Don't clear DIRTY bit */ + pte_update_delta(ptep, addr, _PAGE_KERNEL_RW & ~_PAGE_DIRTY, _PAGE_KERNEL_ROX); + break; case SET_MEMORY_RW: pte_update_delta(ptep, addr, _PAGE_KERNEL_RO, _PAGE_KERNEL_RW); break; @@ -97,3 +102,26 @@ int change_memory_attr(unsigned long addr, int numpages, long action) return apply_to_existing_page_range(&init_mm, start, size, change_page_attr, (void *)action); } + +#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE) +#ifdef CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC +void __kernel_map_pages(struct page *page, int numpages, int enable) +{ + int err; + unsigned long addr = (unsigned long)page_address(page); + + if (PageHighMem(page)) + return; + + if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) && !radix_enabled()) + err = hash__kernel_map_pages(page, numpages, enable); + else if (enable) + err = set_memory_p(addr, numpages); + else + err = set_memory_np(addr, numpages); + + if (err) + panic("%s: changing memory protections failed\n", __func__); +} +#endif +#endif diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 12498017da8e..face94977cb2 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -167,18 +167,3 @@ void mark_rodata_ro(void) set_memory_ro((unsigned long)_stext, numpages); } #endif - -#if defined(CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC) && defined(CONFIG_DEBUG_PAGEALLOC) -void __kernel_map_pages(struct page *page, int numpages, int enable) -{ - unsigned long addr = (unsigned long)page_address(page); - - if (PageHighMem(page)) - return; - - if (enable) - set_memory_p(addr, numpages); - else - set_memory_np(addr, numpages); -} -#endif /* CONFIG_DEBUG_PAGEALLOC */ |