diff options
Diffstat (limited to 'arch/powerpc/mm/mem.c')
-rw-r--r-- | arch/powerpc/mm/mem.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 52b77684acda..7b0d286bf9ba 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -25,6 +25,7 @@ #include <asm/mmzone.h> #include <asm/ftrace.h> #include <asm/code-patching.h> +#include <asm/setup.h> #include <mm/mmu_decl.h> @@ -105,6 +106,37 @@ void __ref arch_remove_linear_mapping(u64 start, u64 size) vm_unmap_aliases(); } +/* + * After memory hotplug the variables max_pfn, max_low_pfn and high_memory need + * updating. + */ +static void update_end_of_memory_vars(u64 start, u64 size) +{ + unsigned long end_pfn = PFN_UP(start + size); + + if (end_pfn > max_pfn) { + max_pfn = end_pfn; + max_low_pfn = end_pfn; + high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; + } +} + +int __ref add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages, + struct mhp_params *params) +{ + int ret; + + ret = __add_pages(nid, start_pfn, nr_pages, params); + if (ret) + return ret; + + /* update max_pfn, max_low_pfn and high_memory */ + update_end_of_memory_vars(start_pfn << PAGE_SHIFT, + nr_pages << PAGE_SHIFT); + + return ret; +} + int __ref arch_add_memory(int nid, u64 start, u64 size, struct mhp_params *params) { @@ -115,7 +147,7 @@ int __ref arch_add_memory(int nid, u64 start, u64 size, rc = arch_create_linear_mapping(nid, start, size, params); if (rc) return rc; - rc = __add_pages(nid, start_pfn, nr_pages, params); + rc = add_pages(nid, start_pfn, nr_pages, params); if (rc) arch_remove_linear_mapping(start, size); return rc; |