ARM: 9053/1: arm/mm/ptdump:Add address markers for KASAN regions

ARM has recently supported KASAN, so I think that it's time to add
KASAN regions for PTDUMP on ARM.

This patch has been tested with QEMU + vexpress-a15. Both
CONFIG_ARM_LPAE and no CONFIG_ARM_LPAE.

The result after patching looks like this:
 ---[ Kasan shadow start ]---
 0x6ee00000-0x7af00000         193M     RW NX SHD MEM/CACHED/WBWA
 0x7b000000-0x7f000000          64M     ro NX SHD MEM/CACHED/WBWA
 ---[ Kasan shadow end ]---
 ---[ Modules ]---
 ---[ Kernel Mapping ]---
	......
 ---[ vmalloc() Area ]---
	......
 ---[ vmalloc() End ]---
 ---[ Fixmap Area ]---
 ---[ Vectors ]---
 	......
 ---[ Vectors End ]---

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hailong liu <liu.hailong6@zte.com.cn>
Signed-off-by: Hailong liu <carver4lio@163.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c
index c18d23a..93ff009 100644 (file)
--- a/arch/arm/mm/dump.c
+++ b/arch/arm/mm/dump.c
@@ -19,6 +19,10 @@
 #include <asm/ptdump.h>
 
 static struct addr_marker address_markers[] = {
+#ifdef CONFIG_KASAN
+       { KASAN_SHADOW_START,   "Kasan shadow start"},
+       { KASAN_SHADOW_END,     "Kasan shadow end"},
+#endif
        { MODULES_VADDR,        "Modules" },
        { PAGE_OFFSET,          "Kernel Mapping" },
        { 0,                    "vmalloc() Area" },
@@ -429,8 +433,11 @@ static void ptdump_initialize(void)
                                if (pg_level[i].bits[j].nx_bit)
                                        pg_level[i].nx_bit = &pg_level[i].bits[j];
                        }
-
+#ifdef CONFIG_KASAN
+       address_markers[4].start_address = VMALLOC_START;
+#else
        address_markers[2].start_address = VMALLOC_START;
+#endif
 }
 
 static struct ptdump_info kernel_ptdump_info = {