Kconfig

mainmenu "NEMU Configuration Menu"

choice
  prompt "Base ISA"
  default ISA_riscv32
config ISA_x86
  bool "x86"
config ISA_mips32
  bool "mips32"
config ISA_riscv32
  bool "riscv32"
config ISA_riscv64
  bool "riscv64"
endchoice

config ISA
  string
  default "x86" if ISA_x86
  default "mips32" if ISA_mips32
  default "riscv32" if ISA_riscv32
  default "riscv64" if ISA_riscv64
  default "none"

config ILEN_MIN
  int
  default 1 if ISA_x86
  default 4 if ISA_mips32
  default 4 if ISA_riscv32
  default 2 if ISA_riscv64
  default 1

config ISA64
  depends on ISA_riscv64
  bool
  default y

if ISA_x86
source "src/isa/x86/Kconfig"
endif

if ISA_riscv64
source "src/isa/riscv64/Kconfig"
endif

choice
  prompt "NEMU execution engine"
  default ENGINE_INTERPRETER

config ENGINE_INTERPRETER
  bool "Interpreter"
  help
    Interpreter guest instructions one by one.
endchoice

config ENGINE
  string
  default "interpreter" if ENGINE_INTERPRETER
  default "none"

choice
  prompt "Running mode"
  default MODE_SYSTEM

config MODE_SYSTEM
  bool "System mode"
  help
    Support full-system functionality, including privileged instructions, MMU and devices.

config MODE_USER
  bool "User mode"
  help
    Only support non-privileged instructions. System calls are forwarded to NEMU or Linux host.
endchoice

menu "Build Options"
choice
  prompt "Compiler"
  default CC_GCC
config CC_GCC
  bool "gcc"
config CC_GPP
  bool "g++"
config CC_CLANG
  bool "clang"
endchoice

config CC
  string
  default "gcc" if CC_GCC
  default "g++" if CC_GPP
  default "clang" if CC_CLANG
  default "none"

choice
  prompt "Optimization Level"
  default CC_O2
config CC_O0
  bool "O0"
config CC_O1
  bool "O1"
config CC_O2
  bool "O2"
config CC_O3
  bool "O3"
endchoice

config CC_OPT
  string
  default "-O0" if CC_O0
  default "-O1" if CC_O1
  default "-O2" if CC_O2
  default "-O3" if CC_O3
  default "none"

config CC_NATIVE_ARCH
  bool "Enable march=native"
  default n

config CC_LTO
  bool "Enable link-time optimization"
  default y

config CC_DEBUG
  bool "Enable debug information"
  default n

config CC_ASAN
  depends on !MODE_USER
  bool "Enable address sanitizer"
  default n
endmenu

menu "Testing and Debugging"
config DEBUG
  bool "Enable debug features: instruction tracing and watchpoint"
  default n
  help
    Enable debug features, which include instruction tracing and watchpoint.
    Add -l <logfile path> to enable instruction tracing and log dump.

config SIMPLE_LOG
  bool "Make log output simpler"
  default n
  help
    Make the log output simpler, without color, file path and line number.

config SHARE_OUTPUT_LOG_TO_FILE
  bool "Output log to file"
  depends on SHARE
  default n
  help
    If y, NEMU will output log to files named "nemu-hart-*.log".

    Note: This option is only effective in SHARE mode. For standalone mode, 
    use the corresponding command option.

config DIFFTEST
  depends on !SHARE
  bool "Enable differential testing"
  default n
  help
    Enable differential testing with a reference design.
    Note that this will significantly reduce the performance of NEMU.

choice
  prompt "Reference design"
  default DIFFTEST_REF_QEMU_DL
  depends on DIFFTEST
config DIFFTEST_REF_QEMU_DL
  bool "QEMU, communicate with dynamic linking"
config DIFFTEST_REF_QEMU_SOCKET
  bool "QEMU, communicate with socket"
config DIFFTEST_REF_KVM
  bool "KVM"
config DIFFTEST_REF_NEMU
  bool "NEMU"
config DIFFTEST_REF_SPIKE
  bool "SPIKE"
endchoice

config DIFFTEST_STORE_COMMIT
  depends on DIFFTEST_REF_SPIKE
  bool "Check the data of the store class instruction"
  default n


config DIFFTEST_REF_QEMU
  depends on DIFFTEST_REF_QEMU_DL || DIFFTEST_REF_QEMU_SOCKET
  bool
  default y

config DIFFTEST_REF_PATH
  string
  default "tools/qemu-dl-diff" if DIFFTEST_REF_QEMU_DL
  default "tools/qemu-socket-diff" if DIFFTEST_REF_QEMU_SOCKET
  default "tools/kvm-diff" if DIFFTEST_REF_KVM
  default "." if DIFFTEST_REF_NEMU
  default "none"

config DIFFTEST_REF_NAME
  string
  default "qemu" if DIFFTEST_REF_QEMU_DL
  default "qemu" if DIFFTEST_REF_QEMU_SOCKET
  default "kvm" if DIFFTEST_REF_KVM
  default "nemu-interpreter" if DIFFTEST_REF_NEMU
  default "none"

config IQUEUE
  bool "Record the last instrucitons executed"
  default n

config MEMLOG
  bool "Enable Log for memory"
  default n

config TRANSLOG
  bool "Enable Log for address translation"
  default n

config EXITLOG
  bool "Enable Log for exiting reasons"
  default n

config TRACE_INST
  bool "Enable Log for tracing instructions"
  default n

config TRACE_INST_DASM
  depends on DEBUG
  bool "Enable rich Log for tracing instructions, pc, inst and dasm included"
  default n

config TRACE_BB
  bool "Enable Log for tracing basic block"
  default n

config SIMPOINT_LOG
  bool "Enable Log for simpoint profiling"
  default n

config BR_LOG
  bool "Enable branch log"
  default n
  help
    Branch Log (br_log) is mainly used for lightssss (LightQS) to run ahead of
    DUT. But it could also used for debugging.

config BR_LOG_SIZE
  int "The size of branch log"
  depends on BR_LOG
  default 50000000
  help
    When br_log is overflow, it will overwrite from beginning.

config BR_LOG_OUTPUT
  bool "Enable branch log output"
  default n
  help
    Enable br_log output when NEMU exits. As a reference, You could use
    br_log_dump() to dump br_log whenever you want.

endmenu

if !MODE_USER
source "src/memory/Kconfig"
source "src/device/Kconfig"
endif

choice
  prompt "FPU Emulation"
  default FPU_SOFT
config FPU_HOST
  bool "Use host floating point operation"
config FPU_SOFT
  bool "Use softfloat library"
config FPU_NONE
  bool "Disable FPU Emulation"
endchoice

choice
  prompt "Detecting misaligned memory accessing"
  default AC_SOFT
config AC_HOST
  bool "By host CPU (x86 host only)"
config AC_SOFT
  bool "By software emulation"
config AC_NONE
  bool "Disable"
endchoice

config VECTOR_AC_SOFT
  bool "Detecting misaligned vector memory accessing"
  default y

config MMIO_AC_SOFT
  bool "Detecting misaligned mmio memory accessing"
  default y

config AMO_AC_SOFT
  bool "Detecting misaligned amo memory accessing"
  default y

menu "Processor difftest reference config"
config SHARE
  bool "Build shared library as processor difftest reference"
  default n

config DIFFTEST_STORE_COMMIT
  depends on SHARE
  bool "Maintain a committed store queue for processor ref"
  default y

config DIFFTEST_REF_FOR_GEM5
  depends on SHARE
  bool "Always copy lrsc valid to lr valid for GEM5"
  default n

config DIFFTEST_STORE_COMMIT_AMO
  depends on DIFFTEST_STORE_COMMIT
  bool "Also record store requests by AMO instructions"
  default n

config DIFFTEST_STORE_QUEUE_SIZE
  depends on DIFFTEST_STORE_COMMIT
  int "Size of committed store queue"
  default 64

config GUIDED_EXEC
  depends on SHARE
  bool "Enable DUT guided execution"
  default y

config GUIDED_TVAL
  bool "When page fault is present, use DUT's tval"
  depends on GUIDED_EXEC
  default n
  help
    This will use the dut's tval as the tval when triggering page fault, but be careful, this may synchronize the wrong data.
    This is mainly for vector access, which causes NEMU to trigger pf when vector access actually triggers an pf.
    If this option is not enabled, NEMU fires the vector pf on the first element.

config QUERY_REF
  depends on SHARE
  bool "Enable event query support when used as difftest ref"
  default y

config LARGE_COPY
  depends on SHARE && !MEM_RANDOM
  bool "Enable difftest large memory copy optimization"
  default n

config PANIC_ON_UNIMP_CSR
  depends on SHARE
  bool "Panic if an unimplemented CSR is being accessed"
  default n

config REF_STATUS
  depends on SHARE
  bool "Enable ref status API"
  default n

endmenu

menu "Miscellaneous"
choice
  prompt "Host timer"
  default TIMER_GETTIMEOFDAY
config TIMER_GETTIMEOFDAY
  bool "gettimeofday"
config TIMER_CLOCK_GETTIME
  bool "clock_gettime"
endchoice

config DETERMINISTIC
  bool "Make the behavior of NEMU deterministic"
  default y
  help
    If enabled, NEMU's execution will be fully deterministic, ensuring that
    running same workload multiple times produces identical instruction trace
    and results.

    If enabled, the update of timer and devices will no longer depend on host
    alarm. Also, the value of timer (RTC) will depend on instruction counting,
    rather than host real time.

config DISABLE_HOST_ALARM
  bool
  default y if SHARE || DETERMINISTIC
  default n

config MEMORY_REGION_ANALYSIS
  bool "Enable Program memory segment analysis"
  default n

if MEMORY_REGION_ANALYSIS
config MEMORY_REGION_ANALYSIS_SIZE
  int "Analysis block MB size"
  default 32
endif

config REPORT_ILLEGAL_INSTR
  bool "Let NEMU report illegal instruction"
  default y

config RT_CHECK
  bool "Enable runtime checking"
  default y

config PERF_OPT
  depends on !SHARE
  bool "Performance optimization"
  default y

if PERF_OPT
config TCACHE_SIZE
  int "Number of entries in trace cache"
  default 8192

config BB_LIST_SIZE
  int "Number of entries in basic block metadata list"
  default 1024

config BB_POOL_SIZE
  int "Number of entries in basic block metadata pool"
  default 1024

endif

choice
  prompt "Instruction counting accuracy"
  default INSTR_CNT_BY_BB if PERF_OPT
  default INSTR_CNT_BY_INSTR_NORMAL if !PERF_OPT

config INSTR_CNT_DISABLED
  bool "Disabled"
  depends on !DEBUG && !SHARE

config INSTR_CNT_BY_BB
  bool "By Basic Block (BB)"
  depends on PERF_OPT

config INSTR_CNT_BY_INSTR_PERF_OPT
  bool "By Instruction"
  depends on PERF_OPT
  select INSTR_CNT_BY_INSTR

config INSTR_CNT_BY_INSTR_NORMAL
  bool "By Instruction"
  depends on !PERF_OPT
  select INSTR_CNT_BY_INSTR

endchoice

config INSTR_CNT_BY_INSTR
  bool
  default n

config ENABLE_INSTR_CNT
  bool
  default y if INSTR_CNT_BY_INSTR || INSTR_CNT_BY_BB
  default n

endmenu