diff options
| author | Ed Swarthout <Ed.Swarthout@freescale.com> | 2007-09-21 12:53:02 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-10-03 09:12:06 +1000 |
| commit | df174e3be88d4352bfcfe20d11adc671d2961c79 (patch) | |
| tree | 0bf4e4c1d48eff6487d2e25b4b25f326b7300c5a /arch/powerpc | |
| parent | 94987aff23bcdd7cee92edf02c2f4ef259d1cbf6 (diff) | |
[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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/init_32.c | 37 | ||||
| -rw-r--r-- | arch/powerpc/mm/init_64.c | 2 |
2 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c index d65995ae8273..27c234fb5118 100644 --- a/arch/powerpc/mm/init_32.c +++ b/arch/powerpc/mm/init_32.c @@ -255,3 +255,40 @@ void free_initrd_mem(unsigned long start, unsigned long end) } } #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 diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index 9f27bb56a61d..fa90f6561b9f 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -113,6 +113,7 @@ void free_initrd_mem(unsigned long start, unsigned long end) } #endif +#ifdef CONFIG_PROC_KCORE static struct kcore_list kcore_vmem; static int __init setup_kcore(void) @@ -139,6 +140,7 @@ static int __init setup_kcore(void) return 0; } module_init(setup_kcore); +#endif static void zero_ctor(void *addr, struct kmem_cache *cache, unsigned long flags) { |