diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/riscv/Kconfig | 245 | ||||
| -rw-r--r-- | arch/riscv/Kconfig.debug | 37 |
2 files changed, 282 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig new file mode 100644 index 000000000..a34498028 --- /dev/null +++ b/arch/riscv/Kconfig @@ -0,0 +1,245 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/kconfig-language.txt. +# + +config 64BIT + bool + +config 32BIT + bool + +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 + select ARCH_WANT_FRAME_POINTERS + select CLONE_BACKWARDS + select COMMON_CLK + select DMA_DIRECT_OPS + select GENERIC_CLOCKEVENTS + select GENERIC_CPU_DEVICES + select GENERIC_IRQ_SHOW + select GENERIC_PCI_IOMAP + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER + select GENERIC_SMP_IDLE_THREAD + select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A + select HAVE_MEMBLOCK + select HAVE_MEMBLOCK_NODE_MAP + select HAVE_DMA_CONTIGUOUS + select HAVE_GENERIC_DMA_COHERENT + select HAVE_PERF_EVENTS + select IRQ_DOMAIN + select NO_BOOTMEM + select RISCV_ISA_A if SMP + select SPARSE_IRQ + select SYSCTL_EXCEPTION_TRACE + select HAVE_ARCH_TRACEHOOK + select MODULES_USE_ELF_RELA if MODULES + select THREAD_INFO_IN_TASK + select RISCV_TIMER + select GENERIC_IRQ_MULTI_HANDLER + select ARCH_HAS_PTE_SPECIAL + +config MMU + def_bool y + +config ZONE_DMA32 + bool + default y if 64BIT + +config PAGE_OFFSET + hex + default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB + default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB + default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB + +config STACKTRACE_SUPPORT + def_bool y + +config TRACE_IRQFLAGS_SUPPORT + def_bool y + +config RWSEM_GENERIC_SPINLOCK + def_bool y + +config GENERIC_BUG + def_bool y + depends on BUG + select GENERIC_BUG_RELATIVE_POINTERS if 64BIT + +config GENERIC_BUG_RELATIVE_POINTERS + bool + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config GENERIC_CSUM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config PGTABLE_LEVELS + int + default 3 if 64BIT + default 2 + +config HAVE_KPROBES + def_bool n + +menu "Platform type" + +choice + prompt "Base ISA" + default ARCH_RV64I + help + This selects the base ISA that this kernel will traget and must match + the target platform. + +config ARCH_RV32I + bool "RV32I" + select 32BIT + select GENERIC_LIB_ASHLDI3 + select GENERIC_LIB_ASHRDI3 + select GENERIC_LIB_LSHRDI3 + select GENERIC_LIB_UCMPDI2 + +config ARCH_RV64I + bool "RV64I" + select 64BIT + select HAVE_FUNCTION_TRACER + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_DYNAMIC_FTRACE + select HAVE_DYNAMIC_FTRACE_WITH_REGS + select SWIOTLB + +endchoice + +# We must be able to map all physical memory into the kernel, but the compiler +# is still a bit more efficient when generating code if it's setup in a manner +# such that it can only map 2GiB of memory. +choice + prompt "Kernel Code Model" + default CMODEL_MEDLOW if 32BIT + default CMODEL_MEDANY if 64BIT + + config CMODEL_MEDLOW + bool "medium low code model" + config CMODEL_MEDANY + bool "medium any code model" +endchoice + +config MODULE_SECTIONS + bool + select HAVE_MOD_ARCH_SPECIFIC + +choice + prompt "Maximum Physical Memory" + default MAXPHYSMEM_2GB if 32BIT + default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW + default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY + + config MAXPHYSMEM_2GB + bool "2GiB" + config MAXPHYSMEM_128GB + depends on 64BIT && CMODEL_MEDANY + select MODULE_SECTIONS if MODULES + bool "128GiB" +endchoice + + +config SMP + bool "Symmetric Multi-Processing" + help + This enables support for systems with more than one CPU. If + you say N here, the kernel will run on single and + multiprocessor machines, but will use only one CPU of a + multiprocessor machine. If you say Y here, the kernel will run + on many, but not all, single processor machines. On a single + processor machine, the kernel will run faster if you say N + here. + + If you don't know what to do here, say N. + +config NR_CPUS + int "Maximum number of CPUs (2-32)" + range 2 32 + depends on SMP + default "8" + +choice + prompt "CPU Tuning" + default TUNE_GENERIC + +config TUNE_GENERIC + bool "generic" + +endchoice + +config RISCV_ISA_C + bool "Emit compressed instructions when building Linux" + default y + help + Adds "C" to the ISA subsets that the toolchain is allowed to emit + when building Linux, which results in compressed instructions in the + Linux binary. + + If you don't know what to do here, say Y. + +config RISCV_ISA_A + def_bool y + +menu "supported PMU type" + depends on PERF_EVENTS + +config RISCV_BASE_PMU + bool "Base Performance Monitoring Unit" + def_bool y + help + A base PMU that serves as a reference implementation and has limited + feature of perf. It can run on any RISC-V machines so serves as the + fallback, but this option can also be disable to reduce kernel size. + +endmenu + +endmenu + +menu "Kernel type" + +source "kernel/Kconfig.hz" + +endmenu + +menu "Bus support" + +config PCI + bool "PCI support" + select PCI_MSI + help + This feature enables support for PCI bus system. If you say Y + here, the kernel will include drivers and infrastructure code + to support PCI bus devices. + + If you don't know what to do here, say Y. + +config PCI_DOMAINS + def_bool PCI + +config PCI_DOMAINS_GENERIC + def_bool PCI + +source "drivers/pci/Kconfig" + +endmenu + +menu "Power management options" + +source kernel/power/Kconfig + +endmenu diff --git a/arch/riscv/Kconfig.debug b/arch/riscv/Kconfig.debug new file mode 100644 index 000000000..3224ff6ec --- /dev/null +++ b/arch/riscv/Kconfig.debug @@ -0,0 +1,37 @@ + +config CMDLINE_BOOL + bool "Built-in kernel command line" + help + For most platforms, it is firmware or second stage bootloader + that by default specifies the kernel command line options. + However, it might be necessary or advantageous to either override + the default kernel command line or add a few extra options to it. + For such cases, this option allows hardcoding command line options + directly into the kernel. + + For that, choose 'Y' here and fill in the extra boot parameters + in CONFIG_CMDLINE. + + The built-in options will be concatenated to the default command + line if CMDLINE_FORCE is set to 'N'. Otherwise, the default + command line will be ignored and replaced by the built-in string. + +config CMDLINE + string "Built-in kernel command string" + depends on CMDLINE_BOOL + default "" + help + Supply command-line options at build time by entering them here. + +config CMDLINE_FORCE + bool "Built-in command line overrides bootloader arguments" + depends on CMDLINE_BOOL + help + Set this option to 'Y' to have the kernel ignore the bootloader + or firmware command line. Instead, the built-in command line + will be used exclusively. + + If you don't know what to do here, say N. + +config EARLY_PRINTK + def_bool y |