From: Alexandre Ghiti <alexandre.ghiti@xxxxxxxxxxxxx>
commit db1503d355a79d1d4255a9996f20e72848b74a56 upstream.
CONFIG_MAXPHYSMEM_* are actually never used, even the nommu defconfigs
selecting the MAXPHYSMEM_2GB had no effects on PAGE_OFFSET since it was
preempted by !MMU case right before.
In addition, the move of the kernel mapping at the end of the address
space broke the use of MAXPHYSMEM_2G with MMU since it defines PAGE_OFFSET
at the same address as the kernel mapping.
Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Fixes: 2bfc6cd81bd1 ("riscv: Move kernel mapping outside of linear mapping")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@xxxxxxxxxxxxx>
Tested-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Tested-by: Conor Dooley <Conor.Dooley@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/Kconfig | 23 ++---------------------
arch/riscv/configs/nommu_k210_defconfig | 2 --
arch/riscv/configs/nommu_k210_sdcard_defconfig | 2 --
arch/riscv/configs/nommu_virt_defconfig | 1 -
4 files changed, 2 insertions(+), 26 deletions(-)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -158,10 +158,9 @@ config PA_BITS
config PAGE_OFFSET
hex
- default 0xC0000000 if 32BIT && MAXPHYSMEM_1GB
+ default 0xC0000000 if 32BIT
default 0x80000000 if 64BIT && !MMU
- default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB
- default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB
+ default 0xffffffe000000000 if 64BIT
config KASAN_SHADOW_OFFSET
hex
@@ -270,24 +269,6 @@ config MODULE_SECTIONS
bool
select HAVE_MOD_ARCH_SPECIFIC
-choice
- prompt "Maximum Physical Memory"
- default MAXPHYSMEM_1GB if 32BIT
- default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW
- default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
-
- config MAXPHYSMEM_1GB
- depends on 32BIT
- bool "1GiB"
- config MAXPHYSMEM_2GB
- depends on 64BIT && CMODEL_MEDLOW
- bool "2GiB"
- config MAXPHYSMEM_128GB
- depends on 64BIT && CMODEL_MEDANY
- bool "128GiB"
-endchoice
-
-
config SMP
bool "Symmetric Multi-Processing"
help
--- a/arch/riscv/configs/nommu_k210_defconfig
+++ b/arch/riscv/configs/nommu_k210_defconfig
@@ -29,8 +29,6 @@ CONFIG_EMBEDDED=y
CONFIG_SLOB=y
# CONFIG_MMU is not set
CONFIG_SOC_CANAAN=y
-CONFIG_SOC_CANAAN_K210_DTB_SOURCE="k210_generic"
-CONFIG_MAXPHYSMEM_2GB=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_CMDLINE="earlycon console=ttySIF0"
--- a/arch/riscv/configs/nommu_k210_sdcard_defconfig
+++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig
@@ -21,8 +21,6 @@ CONFIG_EMBEDDED=y
CONFIG_SLOB=y
# CONFIG_MMU is not set
CONFIG_SOC_CANAAN=y
-CONFIG_SOC_CANAAN_K210_DTB_SOURCE="k210_generic"
-CONFIG_MAXPHYSMEM_2GB=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_CMDLINE="earlycon console=ttySIF0 rootdelay=2 root=/dev/mmcblk0p1 ro"
--- a/arch/riscv/configs/nommu_virt_defconfig
+++ b/arch/riscv/configs/nommu_virt_defconfig
@@ -27,7 +27,6 @@ CONFIG_SLOB=y
# CONFIG_SLAB_MERGE_DEFAULT is not set
# CONFIG_MMU is not set
CONFIG_SOC_VIRT=y
-CONFIG_MAXPHYSMEM_2GB=y
CONFIG_SMP=y
CONFIG_CMDLINE="root=/dev/vda rw earlycon=uart8250,mmio,0x10000000,115200n8 console=ttyS0"
CONFIG_CMDLINE_FORCE=y
