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Diffstat (limited to 'arch/arm64/mm/mmu.c')
-rw-r--r--arch/arm64/mm/mmu.c35
1 files changed, 33 insertions, 2 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index d1d6601b385d..da513a1facf4 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -52,6 +52,8 @@
u64 idmap_t0sz = TCR_T0SZ(VA_BITS);
u64 idmap_ptrs_per_pgd = PTRS_PER_PGD;
+u64 vabits_user __ro_after_init;
+EXPORT_SYMBOL(vabits_user);
u64 kimage_voffset __ro_after_init;
EXPORT_SYMBOL(kimage_voffset);
@@ -451,7 +453,7 @@ static void __init map_mem(pgd_t *pgdp)
struct memblock_region *reg;
int flags = 0;
- if (debug_pagealloc_enabled())
+ if (rodata_full || debug_pagealloc_enabled())
flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
/*
@@ -552,7 +554,19 @@ static void __init map_kernel_segment(pgd_t *pgdp, void *va_start, void *va_end,
static int __init parse_rodata(char *arg)
{
- return strtobool(arg, &rodata_enabled);
+ int ret = strtobool(arg, &rodata_enabled);
+ if (!ret) {
+ rodata_full = false;
+ return 0;
+ }
+
+ /* permit 'full' in addition to boolean options */
+ if (strcmp(arg, "full"))
+ return -EINVAL;
+
+ rodata_enabled = true;
+ rodata_full = true;
+ return 0;
}
early_param("rodata", parse_rodata);
@@ -1032,3 +1046,20 @@ int pud_free_pmd_page(pud_t *pudp, unsigned long addr)
pmd_free(NULL, table);
return 1;
}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+int arch_add_memory(int nid, u64 start, u64 size, struct vmem_altmap *altmap,
+ bool want_memblock)
+{
+ int flags = 0;
+
+ if (rodata_full || debug_pagealloc_enabled())
+ flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
+
+ __create_pgd_mapping(swapper_pg_dir, start, __phys_to_virt(start),
+ size, PAGE_KERNEL, pgd_pgtable_alloc, flags);
+
+ return __add_pages(nid, start >> PAGE_SHIFT, size >> PAGE_SHIFT,
+ altmap, want_memblock);
+}
+#endif