From 1c0eaf0f56d6128af7f0f252855173fcee85d202 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 30 Jun 2017 17:37:32 -0500 Subject: 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 Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman --- arch/powerpc/platforms/powernv/opal.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) (limited to 'arch/powerpc/platforms/powernv/opal.c') diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index 59684b4af4d1..9b87abb178f0 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(); -- cgit