Re: [Qemu-devel] [PATCH v5 00/23] RISC-V QEMU Port Submission

[Michael Clark]

To paraphrase; the case we are failing on is a corner case, where a
register containing a double is used as input to a single precision op. It
won't happen in correct code.

On Thu, Feb 8, 2018 at 2:55 PM, Michael Clark <address@hidden> wrote:

> We are now passing all but one of the set of tests cases in riscv-tests.
> The one failing set of tests relates to support for "9.2 NaN Boxing of
> Narrower Values" as per the RISC-V ISA Specification v2.2. The remaining
> case is where we try to use a single-precision operation on an input that
> doesn't have bits 63:32 all 1s, the input is treated as if it were a quiet
> NaN, rather than as the embedded single, as using a wider value (i.e.
> double) as an input to a single precision operation is defined to be NaN.
> The NaN Boxing of Narrower Values was added to the specification to specify
> the binary format for single precision values in memory
> when fsd/fld (load/store double fp value) is used to save/restore them.
> Indeed, the mechanism is generic and is designed to also handle boxing of
> singles and doubles within quad precision floating point values. The
> implication of supporting NaN Boxing completely (i.e. 100% test passing)
> will require tests for canonical NaN-boxing in all single precision
> floating point operations, and it may be worthwhile having a switch for
> compliance vs performance?
>
> QEMU=./riscv64-softmmu/qemu-system-riscv64
> ALL_TESTS=$(find ../riscv-tools/riscv-tests/build/isa -name 'rv64*-v-*'
> -a ! -name '*.dump'  | sort)
>
> for i in ${ALL_TESTS}; do
>         test=$(basename $i)
>         echo ${test}
>         ${QEMU} -nographic -machine spike_v1.10 -kernel $i
> done
>
> rv64ua-v-amoadd_d
> rv64ua-v-amoadd_w
> rv64ua-v-amoand_d
> rv64ua-v-amoand_w
> rv64ua-v-amomax_d
> rv64ua-v-amomax_w
> rv64ua-v-amomaxu_d
> rv64ua-v-amomaxu_w
> rv64ua-v-amomin_d
> rv64ua-v-amomin_w
> rv64ua-v-amominu_d
> rv64ua-v-amominu_w
> rv64ua-v-amoor_d
> rv64ua-v-amoor_w
> rv64ua-v-amoswap_d
> rv64ua-v-amoswap_w
> rv64ua-v-amoxor_d
> rv64ua-v-amoxor_w
> rv64ua-v-lrsc
> rv64uc-v-rvc
> rv64ud-v-fadd
> rv64ud-v-fclass
> rv64ud-v-fcmp
> rv64ud-v-fcvt
> rv64ud-v-fcvt_w
> rv64ud-v-fdiv
> rv64ud-v-fmadd
> rv64ud-v-fmin
> rv64ud-v-ldst
> rv64ud-v-move
> *** FAILED *** (tohost = 40)
> rv64ud-v-recoding
> rv64ud-v-structural
> rv64uf-v-fadd
> rv64uf-v-fclass
> rv64uf-v-fcmp
> rv64uf-v-fcvt
> rv64uf-v-fcvt_w
> rv64uf-v-fdiv
> rv64uf-v-fmadd
> rv64uf-v-fmin
> rv64uf-v-ldst
> rv64uf-v-move
> rv64uf-v-recoding
> rv64ui-v-add
> rv64ui-v-addi
> rv64ui-v-addiw
> rv64ui-v-addw
> rv64ui-v-and
> rv64ui-v-andi
> rv64ui-v-auipc
> rv64ui-v-beq
> rv64ui-v-bge
> rv64ui-v-bgeu
> rv64ui-v-blt
> rv64ui-v-bltu
> rv64ui-v-bne
> rv64ui-v-fence_i
> rv64ui-v-jal
> rv64ui-v-jalr
> rv64ui-v-lb
> rv64ui-v-lbu
> rv64ui-v-ld
> rv64ui-v-lh
> rv64ui-v-lhu
> rv64ui-v-lui
> rv64ui-v-lw
> rv64ui-v-lwu
> rv64ui-v-or
> rv64ui-v-ori
> rv64ui-v-sb
> rv64ui-v-sd
> rv64ui-v-sh
> rv64ui-v-simple
> rv64ui-v-sll
> rv64ui-v-slli
> rv64ui-v-slliw
> rv64ui-v-sllw
> rv64ui-v-slt
> rv64ui-v-slti
> rv64ui-v-sltiu
> rv64ui-v-sltu
> rv64ui-v-sra
> rv64ui-v-srai
> rv64ui-v-sraiw
> rv64ui-v-sraw
> rv64ui-v-srl
> rv64ui-v-srli
> rv64ui-v-srliw
> rv64ui-v-srlw
> rv64ui-v-sub
> rv64ui-v-subw
> rv64ui-v-sw
> rv64ui-v-xor
> rv64ui-v-xori
> rv64um-v-div
> rv64um-v-divu
> rv64um-v-divuw
> rv64um-v-divw
> rv64um-v-mul
> rv64um-v-mulh
> rv64um-v-mulhsu
> rv64um-v-mulhu
> rv64um-v-mulw
> rv64um-v-rem
> rv64um-v-remu
> rv64um-v-remuw
> rv64um-v-remw
>
>
> On Thu, Feb 8, 2018 at 2:28 PM, Michael Clark <address@hidden> wrote:
>
>> QEMU RISC-V Emulation Support (RV64GC, RV32GC)
>>
>> This version of the RISC-V patch series "lucky number five" contains
>> cleanups to the FPU code, fixes several FPU related test failures in
>> riscv-tests and updates the syscalls for RISC-V linux-user emulation.
>>
>> The git tree for this v5 patch series (squashed and rebased):
>>
>> - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v5
>>
>> The git tree for the v1-v4 patch series with review commit history:
>>
>> - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v4
>> - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v3
>> - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v2
>> - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v1
>>
>> *** Known Issues ***
>>
>> - FPU code needs further work to handle NaN-Boxing of Narrower Values
>> - Disassembler has some checkpatch warnings for the sake of code brevity
>> - scripts/qemu-binfmt-conf.sh has checkpatch warnings due to line length
>> - PMP (Physical Memory Protection) is as-of-yet unused and needs testing
>>
>> *** Changelog ***
>>
>> v5
>>
>> - Fixed 4 test failures in riscv-tests, only one set to go...
>> - Use float_muladd_negate_* flags to floatXX_muladd
>> - Use IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
>> - Fix TARGET_NR_syscalls
>> - Update linux-user/riscv/syscall_nr.h
>> - Fix FENCE.I, needs to terminate translation block
>> - Adjust unusual convention for interruptno >= 0
>>
>> v4
>>
>> - Add @riscv: since 2.12 to CpuInfoArch
>> - Remove misleading little-endian comment from load_kernel
>> - Rename cpu-model property to cpu-type
>> - Drop some unnecessary inline function attributes
>> - Don't allow GDB to set value of x0 register
>> - Remove unnecessary empty property lists
>> - Add Test Finisher device to implement poweroff in virt machine
>> - Implement priv ISA v1.10 trap and sret/mret xPIE/xIE behavior
>> - Store fflags data in fp_status
>> - Purge runtime users of helper_raise_exception
>> - Fix validate_csr
>> - Tidy gen_jalr
>> - Tidy immediate shifts
>> - Add gen_exception_inst_addr_mis
>> - Add gen_exception_debug
>> - Add gen_exception_illegal
>> - Tidy helper_fclass_*
>> - Split rounding mode setting to a new function
>> - Enforce MSTATUS_FS via TB flags
>> - Implement acquire/release barrier semantics
>> - Use atomic operations as required
>> - Fix FENCE and FENCE_I
>> - Remove commented code from spike machines
>> - PAGE_WRITE permissions can be set on loads if page is already dirty
>> - The result of format conversion on an NaN must be a quiet NaN
>> - Add missing process_queued_cpu_work to riscv linux-user
>> - Remove float(32|64)_classify from cpu.h
>> - Removed nonsensical unions aliasing the same type
>> - Use uintN_t instead of uintN_fast_t in fpu_helper.c
>> - Use macros for FPU exception values in softfloat_flags_to_riscv
>> - Move code to set round mode into set_fp_round_mode function
>> - Convert set_fp_exceptions from a macro to an inline function
>> - Convert round mode helper into an inline function
>> - Make fpu_helper ieee_rm array static const
>> - Include cpu_mmu_index in cpu_get_tb_cpu_state flags
>> - Eliminate MPRV influence on mmu_index
>> - Remove unrecoverable do_unassigned_access function
>> - Only update PTE accessed and dirty bits if necessary
>> - Remove unnecessary tlb_flush in set_mode as mode is in mmu_idx
>> - Remove buggy support for misa writes. misa writes are optional
>>   and are not implemented in any known hardware
>> - Always set PTE read or execute permissions during page walk
>> - Reorder helper function declarations to match order in helper.c
>> - Remove redundant variable declaration in get_physical_address
>> - Remove duplicated code from get_physical_address
>> - Use mmu_idx instead of mem_idx in riscv_cpu_get_phys_page_debug
>>
>> v3
>>
>> - Fix indentation in PMP and HTIF debug macros
>> - Fix disassembler checkpatch open brace '{' on next line errors
>> - Fix trailing statements on next line in decode_inst_decompress
>> - NOTE: the other checkpatch issues have been reviewed previously
>>
>> v2
>>
>> - Remove redundant NULL terminators from disassembler register arrays
>> - Change disassembler register name arrays to const
>> - Refine disassembler internal function names
>> - Update dates in disassembler copyright message
>> - Remove #ifdef CONFIG_USER_ONLY version of cpu_has_work
>> - Use ULL suffix on 64-bit constants
>> - Move riscv_cpu_mmu_index from cpu.h to helper.c
>> - Move riscv_cpu_hw_interrupts_pending from cpu.h to helper.c
>> - Remove redundant TARGET_HAS_ICE from cpu.h
>> - Use qemu_irq instead of void* for irq definition in cpu.h
>> - Remove duplicate typedef from struct CPURISCVState
>> - Remove redundant g_strdup from cpu_register
>> - Remove redundant tlb_flush from riscv_cpu_reset
>> - Remove redundant mode calculation from get_physical_address
>> - Remove redundant debug mode printf and dcsr comment
>> - Remove redundant clearing of MSB for bare physical addresses
>> - Use g_assert_not_reached for invalid mode in get_physical_address
>> - Use g_assert_not_reached for unreachable checks in get_physical_address
>> - Use g_assert_not_reached for unreachable type in raise_mmu_exception
>> - Return exception instead of aborting for misaligned fetches
>> - Move exception defines from cpu.h to cpu_bits.h
>> - Remove redundant breakpoint control definitions from cpu_bits.h
>> - Implement riscv_cpu_unassigned_access exception handling
>> - Log and raise exceptions for unimplemented CSRs
>> - Match Spike HTIF exit behavior - don’t print TEST-PASSED
>> - Make frm,fflags,fcsr writes trap when mstatus.FS is clear
>> - Use g_assert_not_reached for unreachable invalid mode
>> - Make hret,uret,dret generate illegal instructions
>> - Move riscv_cpu_dump_state and int/fpr regnames to cpu.c
>> - Lift interrupt flag and mask into constants in cpu_bits.h
>> - Change trap debugging to use qemu_log_mask LOG_TRACE
>> - Change CSR debugging to use qemu_log_mask LOG_TRACE
>> - Change PMP debugging to use qemu_log_mask LOG_TRACE
>> - Remove commented code from pmp.c
>> - Change CpuInfoRISCV qapi schema docs to Since 2.12
>> - Change RV feature macro to use target_ulong cast
>> - Remove riscv_feature and instead use misa extension flags
>> - Make riscv_flush_icache_syscall a no-op
>> - Undo checkpatch whitespace fixes in unrelated linux-user code
>> - Remove redudant constants and tidy up cpu_bits.h
>> - Make helper_fence_i a no-op
>> - Move include "exec/cpu-all" to end of cpu.h
>> - Rename set_privilege to riscv_set_mode
>> - Move redundant forward declaration for cpu_riscv_translate_address
>> - Remove TCGV_UNUSED from riscv_translate_init
>> - Add comment to pmp.c stating the code is untested and currently unused
>> - Use ctz to simplify decoding of PMP NAPOT address ranges
>> - Change pmp_is_in_range to use than equal for end addresses
>> - Fix off by one error in pmp_update_rule
>> - Rearrange PMP_DEBUG so that formatting is compile-time checked
>> - Rearrange trap debugging so that formatting is compile-time checked
>> - Rearrange PLIC debugging so that formatting is compile-time checked
>> - Use qemu_log/qemu_log_mask for HTIF logging and debugging
>> - Move exception and interrupt names into cpu.c
>> - Add Palmer Dabbelt as a RISC-V Maintainer
>> - Rebase against current qemu master branch
>>
>> v1
>>
>> - initial version based on forward port from riscv-qemu repository
>>
>> *** Background ***
>>
>> "RISC-V is an open, free ISA enabling a new era of processor innovation
>> through open standard collaboration. Born in academia and research,
>> RISC-V ISA delivers a new level of free, extensible software and
>> hardware freedom on architecture, paving the way for the next 50 years
>> of computing design and innovation."
>>
>> The QEMU RISC-V port has been developed and maintained out-of-tree for
>> several years by Sagar Karandikar and Bastian Koppelmann. The RISC-V
>> Privileged specification has evolved substantially over this period but
>> has recently been solidifying. The RISC-V Base ISA has been frozon for
>> some time and the Privileged ISA, GCC toolchain and Linux ABI are now
>> quite stable. I have recently joined Sagar and Bastian as a RISC-V QEMU
>> Maintainer and hope to support upstreaming the port.
>>
>> There are multiple vendors taping out, preparing to ship, or shipping
>> silicon that implements the RISC-V Privileged ISA Version 1.10. There
>> are also several RISC-V Soft-IP cores implementing Privileged ISA
>> Version 1.10 that run on FPGA such as SiFive's Freedom U500 Platform
>> and the U54‑MC RISC-V Core IP, among many more implementations from a
>> variety of vendors. See https://riscv.org/ for more details.
>>
>> RISC-V support was upstreamed in binutils 2.28 and GCC 7.1 in the first
>> half of 2016. RISC-V support is now available in LLVM top-of-tree and
>> the RISC-V Linux port was accepted into Linux 4.15-rc1 late last year
>> and is available in the Linux 4.15 release. GLIBC 2.27 added support
>> for the RISC-V ISA running on Linux (requires at least binutils-2.30,
>> gcc-7.3.0, and linux-4.15). We believe it is timely to submit the
>> RISC-V QEMU port for upstream review with the goal of incorporating
>> RISC-V support into the upcoming QEMU 2.12 release.
>>
>> The RISC-V QEMU port is still under active development, mostly with
>> respect to device emulation, the addition of Hypervisor support as
>> specified in the RISC-V Draft Privileged ISA Version 1.11, and Vector
>> support once the first draft is finalized later this year. We believe
>> now is the appropriate time for RISC-V QEMU development to be carried
>> out in the main QEMU repository as the code will benefit from more
>> rigorous review. The RISC-V QEMU port currently supports all the ISA
>> extensions that have been finalized and frozen in the Base ISA.
>>
>> Blog post about recent additions to RISC-V QEMU: https://goo.gl/fJ4zgk
>>
>> The RISC-V QEMU wiki: https://github.com/riscv/riscv-qemu/wiki
>>
>> Instructions for building a busybox+dropbear root image, BBL (Berkeley
>> Boot Loader) and linux kernel image for use with the RISC-V QEMU
>> 'virt' machine: https://github.com/michaeljclark/busybear-linux
>>
>> *** Overview ***
>>
>> The RISC-V QEMU port implements the following specifications:
>>
>> - RISC-V Instruction Set Manual Volume I: User-Level ISA Version 2.2
>> - RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.9.1
>> - RISC-V Instruction Set Manual Volume II: Privileged ISA Version 1.10
>>
>> The RISC-V QEMU port supports the following instruction set extensions:
>>
>> - RV32GC with Supervisor-mode and User-mode (RV32IMAFDCSU)
>> - RV64GC with Supervisor-mode and User-mode (RV64IMAFDCSU)
>>
>> The RISC-V QEMU port adds the following targets to QEMU:
>>
>> - riscv32-softmmu
>> - riscv64-softmmu
>> - riscv32-linux-user
>> - riscv64-linux-user
>>
>> The RISC-V QEMU port supports the following hardware:
>>
>> - HTIF Console (Host Target Interface)
>> - SiFive CLINT (Core Local Interruptor) for Timer interrupts and IPIs
>> - SiFive PLIC (Platform Level Interrupt Controller)
>> - SiFive Test (Test Finisher) for exiting simulation
>> - SiFive UART, PRCI, AON, PWM, QSPI support is partially implemented
>> - VirtIO MMIO (GPEX PCI support will be added in a future patch)
>> - Generic 16550A UART emulation using 'hw/char/serial.c'
>> - Experimental SMP support (PLIC and CLINT) on the 'virt' machine
>>
>> The RISC-V QEMU full system emulator supports 5 machines:
>>
>> - 'spike_v1.9';  CLINT, PLIC, HTIF console, config-string, Priv v1.9.1
>> - 'spike_v1.10'; CLINT, PLIC, HTIF console, device-tree, Priv v1.10
>> - 'sifive_e300'; CLINT, PLIC, SiFive UART, HiFive1 compat, Priv v1.10
>> - 'sifive_u500'; CLINT, PLIC, SiFive UART, device-tree, Priv v1.10
>> - 'virt'; CLINT, PLIC, 16550A UART, VirtIO, device-tree, Priv v1.10
>>
>> This is a list of RISC-V QEMU Port Contributors:
>>
>> - Alex Suykov
>> - Andreas Schwab
>> - Antony Pavlov
>> - Bastian Koppelmann
>> - Bruce Hoult
>> - Chih-Min Chao
>> - Daire McNamara
>> - Darius Rad
>> - David Abdurachmanov
>> - Ivan Griffin
>> - Jim Wilson
>> - Kito Cheng
>> - Michael Clark
>> - Palmer Dabbelt
>> - Richard Henderon
>> - Sagar Karandikar
>> - Stefan O'Rear
>>
>> Notes:
>>
>> - contributor email addresses available off-list on request.
>> - checkpatch has been run on all 22 patches.
>> - checkpatch exceptions are noted in 2 patches that have errors.
>> - tested linux on 'spike_v1.9', 'spike_v1.10' and 'virt' machines
>> - passes "make check" on full build for all targets
>>
>> This patch series includes the following patches:
>>
>> Michael Clark (23):
>>   RISC-V Maintainers
>>   RISC-V ELF Machine Definition
>>   RISC-V CPU Core Definition
>>   RISC-V Disassembler
>>   RISC-V CPU Helpers
>>   Softfloat support for IEEE 754-201x minimumNumber/maximumNumber
>>   RISC-V FPU Support
>>   RISC-V GDB Stub
>>   RISC-V TCG Code Generation
>>   RISC-V Physical Memory Protection
>>   RISC-V Linux User Emulation
>>   RISC-V HTIF Console
>>   RISC-V HART Array
>>   SiFive RISC-V CLINT Block
>>   SiFive RISC-V PLIC Block
>>   RISC-V Spike Machines
>>   RISC-V VirtIO Machine
>>   SiFive RISC-V UART Device
>>   SiFive RISC-V PRCI Block
>>   SiFive RISC-V Test Finisher
>>   SiFive Freedom E300 RISC-V Machine
>>   SiFive Freedom U500 RISC-V Machine
>>   RISC-V Build Infrastructure
>>
>>  MAINTAINERS                            |   11 +
>>  Makefile.objs                          |    1 +
>>  arch_init.c                            |    2 +
>>  configure                              |   11 +
>>  cpus.c                                 |    6 +
>>  default-configs/riscv32-linux-user.mak |    1 +
>>  default-configs/riscv32-softmmu.mak    |    4 +
>>  default-configs/riscv64-linux-user.mak |    1 +
>>  default-configs/riscv64-softmmu.mak    |    4 +
>>  disas.c                                |    2 +
>>  disas/Makefile.objs                    |    1 +
>>  disas/riscv.c                          | 3054
>> ++++++++++++++++++++++++++++++++
>>  fpu/softfloat-specialize.h             |    7 +-
>>  fpu/softfloat.c                        |   41 +-
>>  hw/riscv/Makefile.objs                 |   13 +
>>  hw/riscv/riscv_elf.c                   |  244 +++
>>  hw/riscv/riscv_hart.c                  |   95 +
>>  hw/riscv/riscv_htif.c                  |  373 ++++
>>  hw/riscv/sifive_clint.c                |  312 ++++
>>  hw/riscv/sifive_e300.c                 |  232 +++
>>  hw/riscv/sifive_plic.c                 |  554 ++++++
>>  hw/riscv/sifive_prci.c                 |   95 +
>>  hw/riscv/sifive_test.c                 |   99 ++
>>  hw/riscv/sifive_u500.c                 |  338 ++++
>>  hw/riscv/sifive_uart.c                 |  182 ++
>>  hw/riscv/spike_v1_09.c                 |  204 +++
>>  hw/riscv/spike_v1_10.c                 |  278 +++
>>  hw/riscv/virt.c                        |  375 ++++
>>  include/disas/bfd.h                    |    2 +
>>  include/elf.h                          |    2 +
>>  include/fpu/softfloat.h                |    4 +
>>  include/hw/riscv/riscv_elf.h           |   69 +
>>  include/hw/riscv/riscv_hart.h          |   45 +
>>  include/hw/riscv/riscv_htif.h          |   62 +
>>  include/hw/riscv/sifive_clint.h        |   56 +
>>  include/hw/riscv/sifive_e300.h         |   79 +
>>  include/hw/riscv/sifive_plic.h         |   91 +
>>  include/hw/riscv/sifive_prci.h         |   43 +
>>  include/hw/riscv/sifive_test.h         |   48 +
>>  include/hw/riscv/sifive_u500.h         |   69 +
>>  include/hw/riscv/sifive_uart.h         |   76 +
>>  include/hw/riscv/spike.h               |   51 +
>>  include/hw/riscv/virt.h                |   74 +
>>  include/sysemu/arch_init.h             |    1 +
>>  linux-user/elfload.c                   |   22 +
>>  linux-user/main.c                      |   97 +
>>  linux-user/riscv/syscall_nr.h          |  287 +++
>>  linux-user/riscv/target_cpu.h          |   18 +
>>  linux-user/riscv/target_signal.h       |   23 +
>>  linux-user/riscv/target_structs.h      |   46 +
>>  linux-user/riscv/target_syscall.h      |   56 +
>>  linux-user/riscv/termbits.h            |  220 +++
>>  linux-user/signal.c                    |  203 ++-
>>  linux-user/syscall.c                   |    2 +
>>  linux-user/syscall_defs.h              |   13 +-
>>  qapi-schema.json                       |   16 +-
>>  scripts/qemu-binfmt-conf.sh            |   13 +-
>>  target/riscv/Makefile.objs             |    1 +
>>  target/riscv/cpu.c                     |  385 ++++
>>  target/riscv/cpu.h                     |  256 +++
>>  target/riscv/cpu_bits.h                |  417 +++++
>>  target/riscv/cpu_user.h                |   16 +
>>  target/riscv/fpu_helper.c              |  375 ++++
>>  target/riscv/gdbstub.c                 |   60 +
>>  target/riscv/helper.c                  |  464 +++++
>>  target/riscv/helper.h                  |   78 +
>>  target/riscv/instmap.h                 |  366 ++++
>>  target/riscv/op_helper.c               |  644 +++++++
>>  target/riscv/pmp.c                     |  386 ++++
>>  target/riscv/pmp.h                     |   70 +
>>  target/riscv/trace-events              |    1 +
>>  target/riscv/translate.c               | 1970 ++++++++++++++++++++
>>  72 files changed, 13800 insertions(+), 17 deletions(-)
>>  create mode 100644 default-configs/riscv32-linux-user.mak
>>  create mode 100644 default-configs/riscv32-softmmu.mak
>>  create mode 100644 default-configs/riscv64-linux-user.mak
>>  create mode 100644 default-configs/riscv64-softmmu.mak
>>  create mode 100644 disas/riscv.c
>>  create mode 100644 hw/riscv/Makefile.objs
>>  create mode 100644 hw/riscv/riscv_elf.c
>>  create mode 100644 hw/riscv/riscv_hart.c
>>  create mode 100644 hw/riscv/riscv_htif.c
>>  create mode 100644 hw/riscv/sifive_clint.c
>>  create mode 100644 hw/riscv/sifive_e300.c
>>  create mode 100644 hw/riscv/sifive_plic.c
>>  create mode 100644 hw/riscv/sifive_prci.c
>>  create mode 100644 hw/riscv/sifive_test.c
>>  create mode 100644 hw/riscv/sifive_u500.c
>>  create mode 100644 hw/riscv/sifive_uart.c
>>  create mode 100644 hw/riscv/spike_v1_09.c
>>  create mode 100644 hw/riscv/spike_v1_10.c
>>  create mode 100644 hw/riscv/virt.c
>>  create mode 100644 include/hw/riscv/riscv_elf.h
>>  create mode 100644 include/hw/riscv/riscv_hart.h
>>  create mode 100644 include/hw/riscv/riscv_htif.h
>>  create mode 100644 include/hw/riscv/sifive_clint.h
>>  create mode 100644 include/hw/riscv/sifive_e300.h
>>  create mode 100644 include/hw/riscv/sifive_plic.h
>>  create mode 100644 include/hw/riscv/sifive_prci.h
>>  create mode 100644 include/hw/riscv/sifive_test.h
>>  create mode 100644 include/hw/riscv/sifive_u500.h
>>  create mode 100644 include/hw/riscv/sifive_uart.h
>>  create mode 100644 include/hw/riscv/spike.h
>>  create mode 100644 include/hw/riscv/virt.h
>>  create mode 100644 linux-user/riscv/syscall_nr.h
>>  create mode 100644 linux-user/riscv/target_cpu.h
>>  create mode 100644 linux-user/riscv/target_signal.h
>>  create mode 100644 linux-user/riscv/target_structs.h
>>  create mode 100644 linux-user/riscv/target_syscall.h
>>  create mode 100644 linux-user/riscv/termbits.h
>>  create mode 100644 target/riscv/Makefile.objs
>>  create mode 100644 target/riscv/cpu.c
>>  create mode 100644 target/riscv/cpu.h
>>  create mode 100644 target/riscv/cpu_bits.h
>>  create mode 100644 target/riscv/cpu_user.h
>>  create mode 100644 target/riscv/fpu_helper.c
>>  create mode 100644 target/riscv/gdbstub.c
>>  create mode 100644 target/riscv/helper.c
>>  create mode 100644 target/riscv/helper.h
>>  create mode 100644 target/riscv/instmap.h
>>  create mode 100644 target/riscv/op_helper.c
>>  create mode 100644 target/riscv/pmp.c
>>  create mode 100644 target/riscv/pmp.h
>>  create mode 100644 target/riscv/trace-events
>>  create mode 100644 target/riscv/translate.c
>>
>> --
>> 2.7.0
>>
>>
>