On powernv secondary cpus are returned to OPAL, and will then enter the
target kernel in big-endian. However if it is set the HILE bit will persist,
causing the first exception in the target kernel to be delivered in
litte-endian regardless of the kernel endianess.
Make sure that the HILE bit is switched off before entering
kexec_sequence.
Signed-off-by: Samuel Mendoza-Jonas <sam...@au1.ibm.com>
---
arch/powerpc/kernel/machine_kexec_64.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/kernel/machine_kexec_64.c
b/arch/powerpc/kernel/machine_kexec_64.c
index 1a74446..2266135c 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -22,8 +22,10 @@
#include <asm/page.h>
#include <asm/current.h>
#include <asm/machdep.h>
+#include <asm/opal.h>
#include <asm/cacheflush.h>
#include <asm/paca.h>
+#include <asm/firmware.h>
#include <asm/mmu.h>
#include <asm/sections.h> /* _end */
#include <asm/prom.h>
@@ -356,6 +358,10 @@ void default_machine_kexec(struct kimage *image)
* switched to a static version!
*/
+ /* Reset HILE in case we kexec into an older BE kernel */
+ if (firmware_has_feature(FW_FEATURE_OPALv3))
+ opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE);
+
/* Some things are best done in assembly. Finding globals with
* a toc is easier in C, so pass in what we can.
*/
--
2.4.5
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