From: Allen Pais <allen.pais@oracle.com>
Date: Fri, 7 Jul 2017 07:38:12 +0000 (+0530)
Subject: sparc64: Make FORCE_MAX_ZONEORDER to 13 for ATU
X-Git-Tag: v4.1.12-106.0.20170720_1900~87
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9c455f579646823d6401bbcc5b933ef159e2804d;p=users%2Fjedix%2Flinux-maple.git

sparc64: Make FORCE_MAX_ZONEORDER to 13 for ATU

This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.

Orabug: 23239179

Reviewed-by: chris hyser <chris.hyser@oracle.com>
Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>
---

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 0075cb6bb231..0f3ee99317c8 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -97,6 +97,10 @@ config ARCH_PROC_KCORE_TEXT
 config CPU_BIG_ENDIAN
 	def_bool y
 
+config ARCH_ATU
+	bool
+	default y if SPARC64
+
 config IOMMU_HELPER
 	bool
 	default y if SPARC64
@@ -379,6 +383,7 @@ config ARCH_SPARSEMEM_DEFAULT
 
 config FORCE_MAX_ZONEORDER
 	int "Maximum zone order"
+	default "13" if ARCH_ATU
 	default "13" if KEXEC
 	default "16"
 	help