Older big-endian ppc64 kernels don't include the FIXUP_ENDIAN check,
meaning if we kexec from a little-endian kernel the target kernel will
fail to boot.
Returning to big-endian before we enter the target kernel ensures that
the target kernel can boot whether or not it includes FIXUP_ENDIAN.
Signed-off-by: Samuel Mendoza-Jonas <sam...@au1.ibm.com>
---
V2: As suggested by Anton take advantage of the rfid call and switch off
MSR_LE and branch to the target kernel in the same step.
kexec_trampoline.S | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/kexec_trampoline.S b/kexec_trampoline.S
index a3eb314..3751112 100644
--- a/kexec_trampoline.S
+++ b/kexec_trampoline.S
@@ -88,8 +88,15 @@ start:
li r5,0
- mtctr r4
- bctr
+ mtsrr0 r4
+
+ mfmsr r5
+ clrrdi r5,r5,1 /* Clear MSR_LE */
+ mtsrr1 r5
+
+ li r5,0
+
+ rfid
. = KERNEL_ADDR_OFFSET
kernel_addr:
--
2.4.5
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