powerpc/powernv: Tell OPAL about our MMU mode on POWER9
That will allow OPAL to configure the CPU in an optimal way.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 59684b4..9b87abb 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -59,6 +59,8 @@ static struct task_struct *kopald_tsk;
void opal_configure_cores(void)
{
+ u64 reinit_flags = 0;
+
/* Do the actual re-init, This will clobber all FPRs, VRs, etc...
*
* It will preserve non volatile GPRs and HSPRG0/1. It will
@@ -66,11 +68,24 @@ void opal_configure_cores(void)
* but it might clobber a bunch.
*/
#ifdef __BIG_ENDIAN__
- opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE);
+ reinit_flags |= OPAL_REINIT_CPUS_HILE_BE;
#else
- opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_LE);
+ reinit_flags |= OPAL_REINIT_CPUS_HILE_LE;
#endif
+ /*
+ * POWER9 always support running hash:
+ * ie. Host hash supports hash guests
+ * Host radix supports hash/radix guests
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_300)) {
+ reinit_flags |= OPAL_REINIT_CPUS_MMU_HASH;
+ if (early_radix_enabled())
+ reinit_flags |= OPAL_REINIT_CPUS_MMU_RADIX;
+ }
+
+ opal_reinit_cpus(reinit_flags);
+
/* Restore some bits */
if (cur_cpu_spec->cpu_restore)
cur_cpu_spec->cpu_restore();