While drmgr has had work in some areas to make its RTAS syscall interactions endian-neutral, its code for performing partition migration via the syscall has never worked on LE. While it is able to complete ibm,suspend-me successfully, it crashes when attempting the subsequent ibm,update-nodes call.
drmgr is the only known (or plausible) user of these ibm,suspend-me, ibm,update-nodes, and ibm,update-properties, so allow them only in big-endian configurations. Signed-off-by: Nathan Lynch <nath...@linux.ibm.com> --- arch/powerpc/kernel/rtas.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index b40fc892138b..132b2ae39009 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -1049,9 +1049,11 @@ static struct rtas_filter rtas_filters[] __ro_after_init = { { "set-time-for-power-on", -1, -1, -1, -1, -1 }, { "ibm,set-system-parameter", -1, 1, -1, -1, -1 }, { "set-time-of-day", -1, -1, -1, -1, -1 }, +#ifdef CONFIG_CPU_BIG_ENDIAN { "ibm,suspend-me", -1, -1, -1, -1, -1 }, { "ibm,update-nodes", -1, 0, -1, -1, -1, 4096 }, { "ibm,update-properties", -1, 0, -1, -1, -1, 4096 }, +#endif { "ibm,physical-attestation", -1, 0, 1, -1, -1 }, }; -- 2.25.4