Commit ee7f881b authored Oct 12, 2015 by Linus Walleij Committed by Catalin Marinas Oct 12, 2015

ARM64: kasan: print memory assignment



This prints out the virtual memory assigned to KASan in the
boot crawl along with other memory assignments, if and only
if KASan is activated.

Example dmesg from the Juno Development board:

Memory: 1691156K/2080768K available (5465K kernel code, 444K rwdata,
2160K rodata, 340K init, 217K bss, 373228K reserved, 16384K cma-reserved)
Virtual kernel memory layout:
    kasan   : 0xffffff8000000000 - 0xffffff9000000000   (    64 GB)
    vmalloc : 0xffffff9000000000 - 0xffffffbdbfff0000   (   182 GB)
    vmemmap : 0xffffffbdc0000000 - 0xffffffbfc0000000   (     8 GB maximum)
              0xffffffbdc2000000 - 0xffffffbdc3fc0000   (    31 MB actual)
    fixed   : 0xffffffbffabfd000 - 0xffffffbffac00000   (    12 KB)
    PCI I/O : 0xffffffbffae00000 - 0xffffffbffbe00000   (    16 MB)
    modules : 0xffffffbffc000000 - 0xffffffc000000000   (    64 MB)
    memory  : 0xffffffc000000000 - 0xffffffc07f000000   (  2032 MB)
      .init : 0xffffffc0007f5000 - 0xffffffc00084a000   (   340 KB)
      .text : 0xffffffc000080000 - 0xffffffc0007f45b4   (  7634 KB)
      .data : 0xffffffc000850000 - 0xffffffc0008bf200   (   445 KB)

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 39d114dd

arch/arm64/mm/init.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -298,6 +298,9 @@ void __init mem_init(void)
		#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)

		pr_notice("Virtual kernel memory layout:\n"
		#ifdef CONFIG_KASAN
		" kasan : 0x%16lx - 0x%16lx (%6ld GB)\n"
		#endif
		" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n"
		#ifdef CONFIG_SPARSEMEM_VMEMMAP
		" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n"
		@@ -310,6 +313,9 @@ void __init mem_init(void)
		" .init : 0x%p" " - 0x%p" " (%6ld KB)\n"
		" .text : 0x%p" " - 0x%p" " (%6ld KB)\n"
		" .data : 0x%p" " - 0x%p" " (%6ld KB)\n",
		#ifdef CONFIG_KASAN
		MLG(KASAN_SHADOW_START, KASAN_SHADOW_END),
		#endif
		MLG(VMALLOC_START, VMALLOC_END),
		#ifdef CONFIG_SPARSEMEM_VMEMMAP
		MLG((unsigned long)vmemmap,

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