select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KASAN if PPC32
+ select HAVE_ARCH_KASAN_VMALLOC if PPC32
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
void kasan_early_init(void);
void kasan_mmu_init(void);
void kasan_init(void);
+void kasan_late_init(void);
#else
static inline void kasan_init(void) { }
static inline void kasan_mmu_init(void) { }
+static inline void kasan_late_init(void) { }
#endif
#endif /* __ASSEMBLY */
#else
#define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
#endif
+
+#ifdef CONFIG_KASAN_VMALLOC
+#define VMALLOC_END _ALIGN_DOWN(ioremap_bot, PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT)
+#else
#define VMALLOC_END ioremap_bot
+#endif
/*
* Bits in a linux-style PTE. These match the bits in the
flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
}
+static void __init kasan_unmap_early_shadow_vmalloc(void)
+{
+ unsigned long k_start = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_START);
+ unsigned long k_end = (unsigned long)kasan_mem_to_shadow((void *)VMALLOC_END);
+ unsigned long k_cur;
+ phys_addr_t pa = __pa(kasan_early_shadow_page);
+
+ if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+ int ret = kasan_init_shadow_page_tables(k_start, k_end);
+
+ if (ret)
+ panic("kasan: kasan_init_shadow_page_tables() failed");
+ }
+ for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) {
+ pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
+ pte_t *ptep = pte_offset_kernel(pmd, k_cur);
+
+ if ((pte_val(*ptep) & PTE_RPN_MASK) != pa)
+ continue;
+
+ __set_pte_at(&init_mm, k_cur, ptep, __pte(0), 0);
+ }
+ flush_tlb_kernel_range(k_start, k_end);
+}
+
void __init kasan_mmu_init(void)
{
int ret;
pr_info("KASAN init done\n");
}
-#ifdef CONFIG_MODULES
+void __init kasan_late_init(void)
+{
+ if (IS_ENABLED(CONFIG_KASAN_VMALLOC))
+ kasan_unmap_early_shadow_vmalloc();
+}
+
+#if defined(CONFIG_MODULES) && !defined(CONFIG_KASAN_VMALLOC)
void *module_alloc(unsigned long size)
{
void *base;