As you see in arch/arm/include/asm/types.h, CONFIG_PHYS_64BIT
determines the size of phys_addr_t. The ARM Large Physical Address
Extension allows CPUs to access a physical address space larger than
4GB, so the physical address may not fit in 32bit long phys_addr_t.
Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---
I did Buildman test, but not run-time test.
Looks like bcm283x (RPI) is the only arch that selects ARMV7_LPAE,
so I hope Stephen will check this patch.
arch/arm/cpu/armv7/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/cpu/armv7/Kconfig b/arch/arm/cpu/armv7/Kconfig
index 0560178..1697e61 100644
--- a/arch/arm/cpu/armv7/Kconfig
+++ b/arch/arm/cpu/armv7/Kconfig
@@ -45,6 +45,7 @@ config ARMV7_PSCI_NR_CPUS
config ARMV7_LPAE
boolean "Use LPAE page table format" if EXPERT
depends on CPU_V7
+ select PHYS_64BIT
default n
---help---
Say Y here to use the long descriptor page table format. This is
--
1.9.1
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