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linux/arch/riscv/Kconfig

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RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
config RISCV
def_bool y
select OF
select OF_EARLY_FLATTREE
select OF_IRQ
select ARCH_WANT_FRAME_POINTERS
select CLONE_BACKWARDS
select COMMON_CLK
riscv: select DMA_DIRECT_OPS instead of redefining it DMA_DIRECT_OPS is defined in lib/Kconfig, so don't duplicate it in arch/riscv/Kconfig. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-04-16 20:53:51 +08:00
select DMA_DIRECT_OPS
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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
riscv: add ZONE_DMA32 This patch allows devices that require memory that can be addressed using 32-bit addresses to work easily on RISC-V systems. The newly improved dma-direct ops will tap into this pool automatically for 32-bit addressing. Based on an earlier patch from Wesley W. Terpstra. CC: Wesley W. Terpstra <terpstra@sifive.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-01-16 16:37:50 +08:00
select HAVE_MEMBLOCK_NODE_MAP
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
select HAVE_DMA_CONTIGUOUS
select HAVE_GENERIC_DMA_COHERENT
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
RISC-V: Move to the new GENERIC_IRQ_MULTI_HANDLER handler The existing mechanism for handling IRQs on RISC-V is pretty ugly: the irq entry code selects the handler via Kconfig dependencies. Use the new generic IRQ handling infastructure, which allows boot time registration of the low level entry handler. This does add an additional load to the interrupt latency, but there's a lot of tuning left to be done there on RISC-V so it's OK for now. Signed-off-by: Palmer Dabbelt <palmer@sifive.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Stafford Horne <shorne@gmail.com> Cc: jonas@southpole.se Cc: catalin.marinas@arm.com Cc: Will Deacon <will.deacon@arm.com> Cc: linux@armlinux.org.uk Cc: stefan.kristiansson@saunalahti.fi Cc: openrisc@lists.librecores.org Cc: linux-riscv@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lkml.kernel.org/r/20180307235731.22627-3-palmer@sifive.com
2018-03-08 07:57:28 +08:00
select GENERIC_IRQ_MULTI_HANDLER
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
config MMU
def_bool y
# even on 32-bit, physical (and DMA) addresses are > 32-bits
config ARCH_PHYS_ADDR_T_64BIT
def_bool y
riscv: add ZONE_DMA32 This patch allows devices that require memory that can be addressed using 32-bit addresses to work easily on RISC-V systems. The newly improved dma-direct ops will tap into this pool automatically for 32-bit addressing. Based on an earlier patch from Wesley W. Terpstra. CC: Wesley W. Terpstra <terpstra@sifive.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-01-16 16:37:50 +08:00
config ZONE_DMA32
bool
default y
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
config ARCH_DMA_ADDR_T_64BIT
def_bool y
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
riscv/ftrace: Add basic support This patch contains basic ftrace support for RV64I platform. Specifically, function tracer (HAVE_FUNCTION_TRACER), function graph tracer (HAVE_FUNCTION_GRAPH_TRACER), and a frame pointer test (HAVE_FUNCTION_GRAPH_FP_TEST) are implemented following the instructions in Documentation/trace/ftrace-design.txt. Note that the functions in both ftrace.c and setup.c should not be hooked with the compiler's -pg option: to prevent infinite self- referencing for the former, and to ignore early setup stuff for the latter. Signed-off-by: Alan Kao <alankao@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-18 17:52:48 +08:00
config TRACE_IRQFLAGS_SUPPORT
def_bool y
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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 CPU_SUPPORTS_32BIT_KERNEL
select 32BIT
select GENERIC_ASHLDI3
select GENERIC_ASHRDI3
select GENERIC_LSHRDI3
config ARCH_RV64I
bool "RV64I"
select CPU_SUPPORTS_64BIT_KERNEL
select 64BIT
riscv/ftrace: Add basic support This patch contains basic ftrace support for RV64I platform. Specifically, function tracer (HAVE_FUNCTION_TRACER), function graph tracer (HAVE_FUNCTION_GRAPH_TRACER), and a frame pointer test (HAVE_FUNCTION_GRAPH_FP_TEST) are implemented following the instructions in Documentation/trace/ftrace-design.txt. Note that the functions in both ftrace.c and setup.c should not be hooked with the compiler's -pg option: to prevent infinite self- referencing for the former, and to ignore early setup stuff for the latter. Signed-off-by: Alan Kao <alankao@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2017-12-18 17:52:48 +08:00
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
riscv/ftrace: Add RECORD_MCOUNT support Now recordmcount.pl recognizes RISC-V object files. For the mechanism to work, we have to disable the linker relaxation. Cc: Greentime Hu <greentime@andestech.com> Signed-off-by: Alan Kao <alankao@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-02-13 13:13:16 +08:00
select HAVE_FTRACE_MCOUNT_RECORD
riscv/ftrace: Add dynamic function tracer support We now have dynamic ftrace with the following added items: * ftrace_make_call, ftrace_make_nop (in kernel/ftrace.c) The two functions turn each recorded call site of filtered functions into a call to ftrace_caller or nops * ftracce_update_ftrace_func (in kernel/ftrace.c) turns the nops at ftrace_call into a call to a generic entry for function tracers. * ftrace_caller (in kernel/mcount-dyn.S) The entry where each _mcount call sites calls to once they are filtered to be traced. Also, this patch fixes the semantic problems in mcount.S, which will be treated as only a reference implementation once we have the dynamic ftrace. Cc: Greentime Hu <greentime@andestech.com> Signed-off-by: Alan Kao <alankao@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-02-13 13:13:17 +08:00
select HAVE_DYNAMIC_FTRACE
riscv/ftrace: Add DYNAMIC_FTRACE_WITH_REGS support Cc: Greentime Hu <greentime@andestech.com> Signed-off-by: Alan Kao <alankao@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-02-13 13:13:20 +08:00
select HAVE_DYNAMIC_FTRACE_WITH_REGS
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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
RISC-V: Add sections of PLT and GOT for kernel module The address of external symbols will locate more than 32-bit offset in 64-bit kernel with sv39 or sv48 virtual addressing. Module loader emits the GOT and PLT entries for data symbols and function symbols respectively. The PLT entry is a trampoline code for jumping to the 64-bit real address. The GOT entry is just the data symbol address. Signed-off-by: Zong Li <zong@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-03-15 16:50:41 +08:00
config MODULE_SECTIONS
bool
select HAVE_MOD_ARCH_SPECIFIC
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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
RISC-V: Add sections of PLT and GOT for kernel module The address of external symbols will locate more than 32-bit offset in 64-bit kernel with sv39 or sv48 virtual addressing. Module loader emits the GOT and PLT entries for data symbols and function symbols respectively. The PLT entry is a trampoline code for jumping to the 64-bit real address. The GOT entry is just the data symbol address. Signed-off-by: Zong Li <zong@andestech.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-03-15 16:50:41 +08:00
select MODULE_SECTIONS if MODULES
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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"
config CPU_SUPPORTS_32BIT_KERNEL
bool
config CPU_SUPPORTS_64BIT_KERNEL
bool
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
endmenu
menu "Kernel type"
choice
prompt "Kernel code model"
default 64BIT
config 32BIT
bool "32-bit kernel"
depends on CPU_SUPPORTS_32BIT_KERNEL
help
Select this option to build a 32-bit kernel.
config 64BIT
bool "64-bit kernel"
depends on CPU_SUPPORTS_64BIT_KERNEL
help
Select this option to build a 64-bit kernel.
endchoice
source "mm/Kconfig"
source "kernel/Kconfig.preempt"
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
source "init/Kconfig"
source "kernel/Kconfig.freezer"
menu "Executable file formats"
source "fs/Kconfig.binfmt"
endmenu
menu "Power management options"
source kernel/power/Kconfig
endmenu
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
menu "Kernel hacking"
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
RISC-V: Rename CONFIG_CMDLINE_OVERRIDE to CONFIG_CMDLINE_FORCE The device tree code looks for CONFIG_CMDLINE_FORCE, but we were using CONFIG_CMDLINE_OVERRIDE. It looks like this was just a hold over from before our device tree conversion -- in fact, we'd already removed the support for CONFIG_CMDLINE_OVERRIDE from our arch-specific code so it didn't even work any more. Thanks to Mortiz and Trung for finding the original bug, and for Michael for suggeting a better fix. CC: Trung Tran <trung.tran@ettus.com> CC: Michael J Clark <mjc@sifive.com> Reviewed-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-03-14 04:31:20 +08:00
line if CMDLINE_FORCE is set to 'N'. Otherwise, the default
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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.
RISC-V: Rename CONFIG_CMDLINE_OVERRIDE to CONFIG_CMDLINE_FORCE The device tree code looks for CONFIG_CMDLINE_FORCE, but we were using CONFIG_CMDLINE_OVERRIDE. It looks like this was just a hold over from before our device tree conversion -- in fact, we'd already removed the support for CONFIG_CMDLINE_OVERRIDE from our arch-specific code so it didn't even work any more. Thanks to Mortiz and Trung for finding the original bug, and for Michael for suggeting a better fix. CC: Trung Tran <trung.tran@ettus.com> CC: Michael J Clark <mjc@sifive.com> Reviewed-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-03-14 04:31:20 +08:00
config CMDLINE_FORCE
RISC-V: Build Infrastructure This patch contains all the build infrastructure that actually enables the RISC-V port. This includes Makefiles, linker scripts, and Kconfig files. It also contains the only top-level change, which adds RISC-V to the list of architectures that need a sed run to produce the ARCH variable when building locally. Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
2017-07-11 09:08:08 +08:00
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
source "lib/Kconfig.debug"
config CMDLINE_BOOL
bool
endmenu
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
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