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[2/3,v2] arm64: defconfig: enable 48-bit virtual addresses

Message ID 1461167854-3244-1-git-send-email-stuart.yoder@nxp.com (mailing list archive)
State New, archived
Headers show

Commit Message

Stuart Yoder April 20, 2016, 3:57 p.m. UTC 
Some armv8 SoCs (e.g. ls2080a) have physical memory maps with discontiguous
DDR regions that require 48-bit VA to have the linear map cover the entire
range of DDR.

Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

Comments

Catalin Marinas April 22, 2016, 11:05 a.m. UTC | #1 
On Wed, Apr 20, 2016 at 10:57:34AM -0500, Stuart Yoder wrote:
> Some armv8 SoCs (e.g. ls2080a) have physical memory maps with discontiguous
> DDR regions that require 48-bit VA to have the linear map cover the entire
> range of DDR.
> 
> Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
> Acked-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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Patch

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 248c242..e8bc263 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -61,6 +61,7 @@  CONFIG_PCI_XGENE=y
 CONFIG_PCI_LAYERSCAPE=y
 CONFIG_PCI_HISI=y
 CONFIG_PCIE_QCOM=y
+CONFIG_ARM64_VA_BITS_48=y
 CONFIG_SCHED_MC=y
 CONFIG_PREEMPT=y
 CONFIG_KSM=y