The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 9f36b96bc70f9707e618d22cd6a6baf86706ade2 Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt palmer@rivosinc.com Date: Fri, 19 Nov 2021 08:44:03 -0800 Subject: [PATCH] RISC-V: MAXPHYSMEM_2GB doesn't depend on CMODEL_MEDLOW
For non-relocatable kernels we need to be able to link the kernel at approximately PAGE_OFFSET, thus requiring medany (as medlow requires the code to be linked within 2GiB of 0). The inverse doesn't apply, though: since medany code can be linked anywhere it's fine to link it close to 0, so we can support the smaller memory config.
Fixes: de5f4b8f634b ("RISC-V: Define MAXPHYSMEM_1GB only for RV32") Reviewed-by: Anup Patel anup@brainfault.org Signed-off-by: Palmer Dabbelt palmer@rivosinc.com
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 821252b65f89..61f64512dcde 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -280,7 +280,7 @@ choice depends on 32BIT bool "1GiB" config MAXPHYSMEM_2GB - depends on 64BIT && CMODEL_MEDLOW + depends on 64BIT bool "2GiB" config MAXPHYSMEM_128GB depends on 64BIT && CMODEL_MEDANY