riscv: keep 32-bit kernel to 32-bit phys_addr_t

While rv32 technically has 34-bit physical addresses, no current platforms
use it and it's likely to shake out driver bugs.

Let's keep 64-bit phys_addr_t off on 32-bit builds until one shows up,
since other work will be needed to make such a system useful anyway.

PHYS_ADDR_T_64BIT is def_bool 64BIT, so just remove the select.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index d1d77c6..b04692f 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -12,8 +12,6 @@ config 32BIT
 
 config RISCV
        def_bool y
-       # even on 32-bit, physical (and DMA) addresses are > 32-bits
-       select PHYS_ADDR_T_64BIT
        select OF
        select OF_EARLY_FLATTREE
        select OF_IRQ