[POWERPC] Add memory regions to the kcore list for 32-bit machines
The entries are only 32-bit, so restrict the virtual address to stay
below 0xffff_ffff. With KERNELBASE set to 0xc000_0000, this in effect
restricts access to the first 1GB of real memory.
Make setup_kcore conditional on CONFIG_PROC_KCORE for both 32/64.
Signed-off-by: Ed Swarthout <Ed.Swarthout@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index d65995a..27c234f 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -255,3 +255,40 @@
}
}
#endif
+
+#ifdef CONFIG_PROC_KCORE
+static struct kcore_list kcore_vmem;
+
+static int __init setup_kcore(void)
+{
+ int i;
+
+ for (i = 0; i < lmb.memory.cnt; i++) {
+ unsigned long base;
+ unsigned long size;
+ struct kcore_list *kcore_mem;
+
+ base = lmb.memory.region[i].base;
+ size = lmb.memory.region[i].size;
+
+ kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
+ if (!kcore_mem)
+ panic("%s: kmalloc failed\n", __FUNCTION__);
+
+ /* must stay under 32 bits */
+ if ( 0xfffffffful - (unsigned long)__va(base) < size) {
+ size = 0xfffffffful - (unsigned long)(__va(base));
+ printk(KERN_DEBUG "setup_kcore: restrict size=%lx\n",
+ size);
+ }
+
+ kclist_add(kcore_mem, __va(base), size);
+ }
+
+ kclist_add(&kcore_vmem, (void *)VMALLOC_START,
+ VMALLOC_END-VMALLOC_START);
+
+ return 0;
+}
+module_init(setup_kcore);
+#endif