Commit df174e3b authored by Ed Swarthout's avatar Ed Swarthout Committed by Paul Mackerras
Browse files

[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: default avatarEd Swarthout <Ed.Swarthout@freescale.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 94987aff

arch/powerpc/mm/init_32.c

+37 −0
Original line number Diff line number Diff line
@@ -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

arch/powerpc/mm/init_64.c

+2 −0
Original line number Diff line number Diff line
@@ -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)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE