From 98ae0069cb78ca4f5d14f203e3bb43874591123f Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Fri, 22 Dec 2017 21:17:09 +1000 Subject: [PATCH] powerpc/pseries: radix is not subject to RMA limit, remove it The radix guest is not subject to the paravirtualized HPT VRMA limit, so remove that from ppc64_rma_size calculation for that platform. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/mm/pgtable-radix.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index ddf584333bcf..60927d019bbf 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -631,15 +631,12 @@ void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base, if (!early_cpu_has_feature(CPU_FTR_HVMODE)) { /* - * We limit the allocation that depend on ppc64_rma_size - * to first_memblock_size. We also clamp it to 1GB to - * avoid some funky things such as RTAS bugs. + * Radix mode guests are not limited by RMA / VRMA addressing. * - * On radix config we really don't have a limitation - * on real mode access. But keeping it as above works - * well enough. + * We do clamp addresses to 1GB to avoid some funky things + * such as RTAS bugs. */ - ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000); + ppc64_rma_size = 0x40000000; /* * Finally limit subsequent allocations. We really don't want * to limit the memblock allocations to rma_size. FIXME!! should -- 2.30.2