riscv: Enable memory hotplugging for RISC-V

Enable ARCH_ENABLE_MEMORY_HOTPLUG and ARCH_ENABLE_MEMORY_HOTREMOVE for
RISC-V.

Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20240605114100.315918-9-bjorn@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index b94176e25be1810e749cb94686b9c536fd9a2bb0..676377e3f7f7b2d79cab647bf53c4f0bab90fa9a 100644 (file)
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -16,6 +16,8 @@ config RISCV
        select ACPI_REDUCED_HARDWARE_ONLY if ACPI
        select ARCH_DMA_DEFAULT_COHERENT
        select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
+       select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM_VMEMMAP
+       select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
        select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
        select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
        select ARCH_HAS_BINFMT_FLAT
@@ -46,6 +48,7 @@ config RISCV
        select ARCH_HAS_UBSAN
        select ARCH_HAS_VDSO_DATA
        select ARCH_KEEP_MEMBLOCK if ACPI
+       select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE if 64BIT && MMU
        select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
        select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
        select ARCH_STACKWALK