diff options
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index f6391442c0c2..e769d2726f4e 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -49,6 +49,7 @@ #include <asm/uv.h> #include <linux/virtio_anchor.h> #include <linux/virtio_config.h> +#include <linux/execmem.h> pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir"); pgd_t invalid_pg_dir[PTRS_PER_PGD] __section(".bss..invalid_pg_dir"); @@ -302,3 +303,32 @@ void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap) vmem_remove_mapping(start, size); } #endif /* CONFIG_MEMORY_HOTPLUG */ + +#ifdef CONFIG_EXECMEM +static struct execmem_info execmem_info __ro_after_init; + +struct execmem_info __init *execmem_arch_setup(void) +{ + unsigned long module_load_offset = 0; + unsigned long start; + + if (kaslr_enabled()) + module_load_offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE; + + start = MODULES_VADDR + module_load_offset; + + execmem_info = (struct execmem_info){ + .ranges = { + [EXECMEM_DEFAULT] = { + .flags = EXECMEM_KASAN_SHADOW, + .start = start, + .end = MODULES_END, + .pgprot = PAGE_KERNEL, + .alignment = MODULE_ALIGN, + }, + }, + }; + + return &execmem_info; +} +#endif /* CONFIG_EXECMEM */ |