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[Qemu-devel] [PULL] RISC-V QEMU Port Submission
From: |
Michael Clark |
Subject: |
[Qemu-devel] [PULL] RISC-V QEMU Port Submission |
Date: |
Tue, 27 Feb 2018 13:15:04 +1300 |
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
The following changes since commit 0a773d55ac76c5aa89ed9187a3bc5af8c5c2a6d0:
maintainers: Add myself as a OpenBSD maintainer (2018-02-23 12:05:07 +0000)
are available in the git repository at:
https://github.com/riscv/riscv-qemu.git tags/riscv-qemu-upstream-v7
for you to fetch changes up to 170a9d412ca1eb3b7ae6f6c1ff86dcbdff0fd7a8:
RISC-V Build Infrastructure (2018-02-27 11:09:43 +1300)
- ----------------------------------------------------------------
QEMU RISC-V Emulation Support (RV64GC, RV32GC)
With this reelase we have contacted all contributors and have received
agreement to re-license their work as GPLv2+. This release also updates
linux-user/riscv/termbits.h which should fix S390 builds. The spike_v1.9
machine has been renamed to spike_v1.9.1 to match the privileged ISA
version and spike_v1.10 has been made the default machine. All substantial
work in this series has been reviewed or acknowledged and subsequent to
submitting this series we will be submitting signed a pull request.
The git tree for the v7 patch series tree (squashed and rebased):
- - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v7
The git tree for the v1-v6 patch series with review commit history:
- - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v6
- - https://github.com/riscv/riscv-qemu/tree/qemu-upstream-v5
- - 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 ***
- - 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 ***
v7
- - Make spike_v1.10 the default machine
- - Rename spike_v1.9 to spike_v1.9.1 to match privileged spec version
- - Remove empty target/riscv/trace-events file
- - Monitor ROM 32-bit reset code needs to be target endian
- - Add TARGET_TIOCGPTPEER to linux-user/riscv/termbits.h
- - Add -initrd support to the virt board
- - Fix naming in spike machine interface header
- - Update copyright notice on RISC-V Spike machines
- - Update copyright notice on RISC-V HTIF Console device
- - Change CPU Core and translator to GPLv2+
- - Change RISC-V Disassembler to GPLv2+
- - Change SiFive Test Finisher to GPLv2+
- - Change SiFive CLINT to GPLv2+
- - Change SiFive PRCI to GPLv2+
- - Change SiFive PLIC to GPLv2+
- - Change RISC-V spike machines to GPLv2+
- - Change RISC-V virt machine to GPLv2+
- - Change SiFive E300 machine to GPLv2+
- - Change SiFive U500 machine to GPLv2+
- - Change RISC-V Hart Array to GPLv2+
- - Change RISC-V HTIF device to GPLv2+
- - Change SiFiveUART device to GPLv2+
v6
- - Drop IEEE 754-201x minimumNumber/maximumNumber for fmin/fmax
- - Remove some unnecessary commented debug statements
- - Change RISCV_CPU_TYPE_NAME to use riscv-cpu suffix
- - Define all CPU variants for linux-user
- - qemu_log calls require trailing \n
- - Replace PLIC printfs with qemu_log
- - Tear out unused HTIF code and eliminate shouting debug messages
- - Fix illegal instruction when sfence.vma is passed (rs2) arguments
- - Make updates to PTE accessed and dirty bits atomic
- - Only require atomic PTE updates on MTTCG enabled guests
- - Page fault if accessed or dirty bits can't be updated
- - Fix get_physical_address PTE reads and writes on riscv32
- - Remove erroneous comments from the PLIC
- - Default enable MTTCG
- - Make WFI less conservative
- - Unify local interrupt handling
- - Expunge HTIF interrupts
- - Always access mstatus.mip under a lock
- - Don't implement rdtime/rdtimeh in system mode (bbl emulates them)
- - Implement insreth/cycleh for rv32 and always enable user-mode counters
- - Add GDB stub support for reading and writing CSRs
- - Rename ENABLE_CHARDEV #ifdef from HTIF code
- - Replace bad HTIF ELF code with load_elf symbol callback
- - Convert chained if else fault handlers to switch statements
- - Use RISCV exception codes for linux-user page faults
v5
- - Implement NaN-boxing for flw, set high order bits to 1
- - 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'
- - MTTCG and 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
- - Hesham Almatary
- - Ivan Griffin
- - Jim Wilson
- - Kito Cheng
- - Michael Clark
- - Palmer Dabbelt
- - Richard Henderson
- - Sagar Karandikar
- - Shea Levy
- - Stefan O'Rear
Notes:
- - contributor email addresses available off-list on request.
- - checkpatch has been run on all 23 patches.
- - checkpatch exceptions are noted in patches that have errors.
- - passes "make check" on full build for all targets
- - tested riscv-linux-4.6.2 on 'spike_v1.9' machine
- - tested riscv-linux-4.15 on 'spike_v1.10' and 'virt' machines
- - tested SiFive HiFive1 binaries in 'sifive_e300' machine
- - tested RV64 on 32-bit i386
- ----------------------------------------------------------------
Michael Clark (23):
RISC-V Maintainers
RISC-V ELF Machine Definition
RISC-V CPU Core Definition
RISC-V Disassembler
RISC-V CPU Helpers
RISC-V FPU Support
RISC-V GDB Stub
RISC-V TCG Code Generation
RISC-V Physical Memory Protection
RISC-V Linux User Emulation
Add symbol table callback interface to load_elf
RISC-V HTIF Console
RISC-V HART Array
SiFive RISC-V CLINT Block
SiFive RISC-V PLIC Block
RISC-V Spike Machines
SiFive RISC-V Test Finisher
RISC-V VirtIO Machine
SiFive RISC-V UART Device
SiFive RISC-V PRCI Block
SiFive Freedom E300 RISC-V Machine
SiFive Freedom U500 RISC-V Machine
RISC-V Build Infrastructure
MAINTAINERS | 11 +
arch_init.c | 2 +
configure | 13 +
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 | 3048 ++++++++++++++++++++++++++++++++
fpu/softfloat-specialize.h | 7 +-
hw/core/loader.c | 18 +-
hw/riscv/Makefile.objs | 12 +
hw/riscv/riscv_hart.c | 89 +
hw/riscv/riscv_htif.c | 258 +++
hw/riscv/sifive_clint.c | 254 +++
hw/riscv/sifive_e300.c | 236 +++
hw/riscv/sifive_plic.c | 505 ++++++
hw/riscv/sifive_prci.c | 89 +
hw/riscv/sifive_test.c | 93 +
hw/riscv/sifive_u500.c | 341 ++++
hw/riscv/sifive_uart.c | 176 ++
hw/riscv/spike_v1_09.c | 202 +++
hw/riscv/spike_v1_10.c | 277 +++
hw/riscv/virt.c | 420 +++++
include/disas/bfd.h | 2 +
include/elf.h | 2 +
include/hw/elf_ops.h | 34 +-
include/hw/loader.h | 17 +-
include/hw/riscv/riscv_hart.h | 39 +
include/hw/riscv/riscv_htif.h | 61 +
include/hw/riscv/sifive_clint.h | 50 +
include/hw/riscv/sifive_e300.h | 73 +
include/hw/riscv/sifive_plic.h | 85 +
include/hw/riscv/sifive_prci.h | 37 +
include/hw/riscv/sifive_test.h | 42 +
include/hw/riscv/sifive_u500.h | 63 +
include/hw/riscv/sifive_uart.h | 71 +
include/hw/riscv/spike.h | 45 +
include/hw/riscv/virt.h | 68 +
include/sysemu/arch_init.h | 1 +
linux-user/elfload.c | 22 +
linux-user/main.c | 99 ++
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 | 222 +++
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 | 390 ++++
target/riscv/cpu.h | 275 +++
target/riscv/cpu_bits.h | 416 +++++
target/riscv/cpu_user.h | 13 +
target/riscv/fpu_helper.c | 373 ++++
target/riscv/gdbstub.c | 62 +
target/riscv/helper.c | 503 ++++++
target/riscv/helper.h | 78 +
target/riscv/instmap.h | 364 ++++
target/riscv/op_helper.c | 655 +++++++
target/riscv/pmp.c | 380 ++++
target/riscv/pmp.h | 64 +
target/riscv/translate.c | 1974 +++++++++++++++++++++
69 files changed, 13301 insertions(+), 27 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_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_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/translate.c
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- [Qemu-devel] [PULL] RISC-V QEMU Port Submission,
Michael Clark <=
- Re: [Qemu-devel] [PULL] RISC-V QEMU Port Submission, Peter Maydell, 2018/02/27
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Stef O'Rear, 2018/02/27
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Michael Clark, 2018/02/27
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Peter Maydell, 2018/02/28
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Peter Maydell, 2018/02/28
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Michael Clark, 2018/02/28
- Re: [Qemu-devel] [patches] Re: [PULL] RISC-V QEMU Port Submission, Emilio G. Cota, 2018/02/28
Re: [Qemu-devel] [PULL] RISC-V QEMU Port Submission, Igor Mammedov, 2018/02/27