From: Nicolas Saenz Julienne <redacted>

The only missing configuration option preventing us from using
multi_v7_defconfig with the Raspberry Pi 4 is ARM_LPAE. It's needed as
the PCIe controller found on the SoC depends on 64bit addressing, yet
can't be included as not all v7 boards support LPAE.

Introduce multi_v7_lpae_defconfig, built off multi_v7_defconfig, which will
avoid us having to duplicate and maintain multiple similar configurations.

Needless to say the Raspberry Pi 4 is not the only platform that can
benefit from this new configuration.

Signed-off-by: Nicolas Saenz Julienne <redacted>
Signed-off-by: Alexander Stein <redacted>
---
Directly applied from https://lore.kernel.org/linux-arm-kernel/20200203184820.4433-2-nsaenzjulienne@suse.de/T/#m96968dd45c0aaa88e0a7387024b5ac13b002363d (local)
Although I had to apply manually

 arch/arm/Makefile            | 4 ++++
 arch/arm/configs/lpae.config | 1 +
 2 files changed, 5 insertions(+)
 create mode 100644 arch/arm/configs/lpae.config

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 506dbc72323bc..80d9eaf3dc06a 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile

@@ -314,6 +314,10 @@ endif
 # My testing targets (bypasses dependencies)
 bp:;	$(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
 
+include $(srctree)/scripts/Makefile.defconf
+PHONY += multi_v7_lpae_defconfig
+multi_v7_lpae_defconfig:
+	$(call merge_into_defconfig,multi_v7_defconfig,lpae)
 
 define archhelp
   echo  '* zImage        - Compressed kernel image (arch/$(ARCH)/boot/zImage)'

diff --git a/arch/arm/configs/lpae.config b/arch/arm/configs/lpae.config
new file mode 100644
index 0000000000000..19bab134e014b
--- /dev/null
+++ b/arch/arm/configs/lpae.config

@@ -0,0 +1 @@
+CONFIG_ARM_LPAE=y

-- 
2.34.1