From: Andi Kleen <ak@suse.de>
Date: Fri, 29 Jul 2005 04:15:32 +0000 (-0700)
Subject: [PATCH] x86_64: Improve CONFIG_GART_IOMMU description and make it default y
X-Git-Tag: firefly_0821_release~42625
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a54649b801e5fe69755dc55e6589f7a65af25d79;p=firefly-linux-kernel-4.4.55.git

[PATCH] x86_64: Improve CONFIG_GART_IOMMU description and make it default y

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 4b8326177c52..660a03a89e66 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -329,12 +329,15 @@ config HPET_EMULATE_RTC
 
 config GART_IOMMU
 	bool "IOMMU support"
+	default y
 	depends on PCI
 	help
-	  Support the K8 IOMMU. Needed to run systems with more than 4GB of memory
+	  Support the IOMMU. Needed to run systems with more than 3GB of memory
 	  properly with 32-bit PCI devices that do not support DAC (Double Address
 	  Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter.
 	  Normally the kernel will take the right choice by itself.
+	  This option includes a driver for the AMD Opteron/Athlon64 IOMMU
+	  and a software emulation used on some other systems.
 	  If unsure, say Y.
 
 # need this always enabled with GART_IOMMU for the VIA workaround