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authorNicholas Piggin <npiggin@gmail.com>2016-10-14 18:31:33 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2016-11-14 11:11:51 +1100
commit70839d207792aa348f013c733e8853c1bd3bc4f0 (patch)
tree899c4d5cce3b3d597e3a5447d930e08300966884 /arch/powerpc/kernel/head_64.S
parent5246adec59458b5d325b8e1462ea9ef3ead7f6ae (diff)
downloadlinux-70839d207792aa348f013c733e8853c1bd3bc4f0.tar.bz2
powerpc/64: Add an option to force run-at-load to test relocation
This adds a config option that can help exercise the case when the kernel is not running at PAGE_OFFSET. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
-rw-r--r--arch/powerpc/kernel/head_64.S9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 04c546e20cc0..451a8e1cf57b 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -107,12 +107,19 @@ __secondary_hold_acknowledge:
* crash_kernel region. The loader is responsible for
* observing the alignment requirement.
*/
+
+#ifdef CONFIG_RELOCATABLE_TEST
+#define RUN_AT_LOAD_DEFAULT 1 /* Test relocation, do not copy to 0 */
+#else
+#define RUN_AT_LOAD_DEFAULT 0x72756e30 /* "run0" -- relocate to 0 by default */
+#endif
+
/* Do not move this variable as kexec-tools knows about it. */
. = 0x5c
.globl __run_at_load
__run_at_load:
DEFINE_FIXED_SYMBOL(__run_at_load)
- .long 0x72756e30 /* "run0" -- relocate to 0 by default */
+ .long RUN_AT_LOAD_DEFAULT
#endif
. = 0x60