feat(boom): add Linux profiles and SPEC2006 configuration

Makefile

@@ -47,8 +47,8 @@ endif
 # from it through the print-buildroot-version target, so a bump here is enough.
 BUILDROOT_VERSION := 2026.08
 BUILDROOT_DIR := build/buildroot
-# DEFAULT_DTB=nutshell or nutshell-* -> nutshell_defconfig; otherwise xiangshan_defconfig.
-BUILDROOT_DEFCONFIG := $(if $(filter nutshell nutshell-%,$(DEFAULT_DTB)),nutshell_defconfig,xiangshan_defconfig)
+# Select the board's userspace and kernel configuration.
+BUILDROOT_DEFCONFIG := $(if $(filter boom boom-%,$(DEFAULT_DTB)),boom_defconfig,$(if $(filter nutshell nutshell-%,$(DEFAULT_DTB)),nutshell_defconfig,xiangshan_defconfig))
 BUILDROOT_CONFIG_STAMP := build/buildroot-config/$(BUILDROOT_DEFCONFIG)
 $(BUILDROOT_DIR)/Makefile:
 	mkdir -p build
@@ -73,7 +73,7 @@ $(TOOLCHAIN_WRAPPER): $(BUILDROOT_CONFIG_STAMP)
 
 # Build Linux kernel
 LINUX_IMAGE := $(BUILDROOT_DIR)/output/images/Image
-$(LINUX_IMAGE): $(TOOLCHAIN_WRAPPER) $(BUILDROOT_CONFIG_STAMP) br2-external/board/openxiangshan/nemu/linux.config $(if $(filter nutshell_defconfig,$(BUILDROOT_DEFCONFIG)),br2-external/board/openxiangshan/nemu/linux-nutshell.fragment)
+$(LINUX_IMAGE): $(TOOLCHAIN_WRAPPER) $(BUILDROOT_CONFIG_STAMP) br2-external/board/openxiangshan/nemu/linux.config $(if $(filter nutshell_defconfig,$(BUILDROOT_DEFCONFIG)),br2-external/board/openxiangshan/nemu/linux-nutshell.fragment) $(if $(filter boom_defconfig,$(BUILDROOT_DEFCONFIG)),br2-external/board/openxiangshan/nemu/linux-boom.fragment)
 	$(MAKE) -C $(BUILDROOT_DIR) BR2_EXTERNAL=$(abspath br2-external) $(BUILDROOT_DEFCONFIG)
 	$(MAKE) -C $(BUILDROOT_DIR) BR2_EXTERNAL=$(abspath br2-external)
 

README.md

@@ -131,6 +131,30 @@ See the
 [SPEC2006 configuration](workloads/linux/spec2006/README.md#configuration)
 section for `riscv_gcc16_rv64imac_lp64.cfg`.
 
+BOOM Linux images use `boom_defconfig`: RV64GC/lp64d userspace and a kernel
+with V and KVM disabled. Choose the UART map through `DEFAULT_DTB`:
+
+```sh
+make linux/hello DEFAULT_DTB=boom-mem2g
+make linux/hello DEFAULT_DTB=boom-fpga-mem2g
+```
+
+`boom-mem2g` uses the simulated UART at `0x10000000`;
+`boom-fpga-mem2g` uses the FPGA UART16550 at `0x310b0000` with 32-bit
+accesses and `reg-shift=2`. Both describe one hart and 2 GiB of DRAM.
+The existing 256 MiB `boom` template also selects `boom_defconfig`.
+Use a clean Buildroot output when switching board profiles so packages and
+the kernel are rebuilt with the selected configuration.
+
+SPEC2006 defaults to the GCC 16 RV64GC Zba/Zbb/Zbs config for BOOM.
+For FPGA, disable startup profiling markers with `SPEC2006_PROFILING=0`
+(the workload-specific form of `PROFILING=0`):
+
+```sh
+make linux/spec2006 BENCH=mcf DEFAULT_DTB=boom-fpga-mem2g \
+  SPEC2006_PROFILING=0 SPEC2006_ISO=/path/to/cpu2006.iso -jN
+```
+
 ## Build Requirements
 
 Any modern Linux distributions should be okay. The build system of this project is using the toolchain provided by buildroot, so you do not have to set up the toolchains manually to build most workloads. Some workloads require additional toolchians not provided by buildroot. Please refer to the README file of each workload (`README.md` in the workload directory) for details.

br2-external/board/openxiangshan/nemu/linux-boom.fragment

@@ -0,0 +1,4 @@
+# BOOM implements RV64GC with Zba/Zbb/Zbs, without V or H.
+# CONFIG_RISCV_ISA_V is not set
+# CONFIG_VIRTUALIZATION is not set
+# CONFIG_KVM is not set

br2-external/configs/boom_defconfig

@@ -0,0 +1,15 @@
+# BOOM RV64GC/LP64D. Bootlin rv64gc toolchain.
+BR2_riscv=y
+BR2_RISCV_ISA_RVC=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TARGET_GENERIC_HOSTNAME="boom"
+BR2_TARGET_GENERIC_ISSUE="BOOM RV64GC Test Image"
+BR2_TARGET_GENERIC_ROOT_PASSWD="xiangshan"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="${BR2_EXTERNAL}/board/openxiangshan/nemu/linux.config"
+BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="${BR2_EXTERNAL}/board/openxiangshan/nemu/linux-boom.fragment"
+BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="${BR2_EXTERNAL}/board/openxiangshan/nemu/busybox-taskset.fragment"
+BR2_PACKAGE_NEMU_TRAP=y
+BR2_PACKAGE_NEMU_EXEC=y

dts/README.md

@@ -45,12 +45,22 @@ The bundled `boom.dts.in` custom template describes the single-hart BOOM v4
 DiffTest platform: RV64IMAFDC with Zba/Zbb/Zbs, Sv39, eight PMP regions at
 four-byte granularity, and 256 MiB DRAM at `0x80000000`. It uses CLINT at
 `0x02000000`, PLIC at `0x0c000000`, and an ns16550 UART at `0x10000000`.
-Select it with `make linux/hello DEFAULT_DTB=boom`; it uses the default
-`xiangshan_defconfig` Buildroot tree with floating-point support.
+Select it with `make linux/hello DEFAULT_DTB=boom`; it uses the
+`boom_defconfig` Buildroot tree with floating-point support.
 
 Linux images with `DEFAULT_DTB=nutshell` or `nutshell-*` use
 `nutshell_defconfig` (RV64IMAC/LP64) instead of `xiangshan_defconfig`.
 
+BOOM also has two generated 2 GiB profiles: `boom-mem2g` uses the simulated
+ns16550 at `0x10000000`; `boom-fpga-mem2g` uses the FPGA UART16550 at
+`0x310b0000`, with a 50 MHz UART clock, `reg-shift=2`, and 32-bit accesses
+(`earlycon=uart8250,mmio32,0x310b0000`). Both use Sv39, CLINT at
+`0x02000000`, PLIC at `0x0c000000`, and eight PMP regions at four-byte
+granularity. Neither UART declares an interrupt connection.
+
+Linux images with `DEFAULT_DTB=boom` or `boom-*` use `boom_defconfig`
+(RV64GC/LP64D userspace, V and KVM disabled in the kernel).
+
 `nutshell` is the 128 MiB machine description used by NEMU's
 `riscv64-nutshell_defconfig`: uartlite at `0x40600000`, no PLIC.
 NutShell simulation uses the same map. `nutshell-mem2g` keeps that

dts/generate-nemu-board-dts.py

@@ -50,6 +50,8 @@ def parse_name(name):
         "spike-2core": (2, 2 << 30),
         "yanqihu": (1, 128 << 20),
         "yanqihu-2core": (2, 128 << 20),
+        "boom-mem2g": (1, 2 << 30),
+        "boom-fpga-mem2g": (1, 2 << 30),
         "xiangshan-fpga-AIA-mem16g": (1, 16 << 30),
     }
     if name in fixed:
@@ -99,15 +101,26 @@ def cache_properties(nemu=False, timebase=False):
     return "\n".join(result)
 
 
-def serial16550():
-    return """uart0: serial@310b0000 {
+def serial16550(label="uart0"):
+    return f"""{label}: serial@310b0000 {{
     compatible = "ns16550a";
     reg = <0x0 0x310b0000 0x0 0x10000>;
     reg-shift = <2>;
     reg-io-width = <4>;
     clock-frequency = <50000000>;
     current-speed = <115200>;
     status = "okay";
+}};"""
+
+
+def serial_boom():
+    return """serial0: ns16550@10000000 {
+    compatible = "ns16550a";
+    clock-frequency = <10000000>;
+    reg = <0x0 0x10000000 0x0 0x100>;
+    reg-shift = <0>;
+    reg-io-width = <1>;
+    status = "okay";
 };"""
 
 
@@ -377,6 +390,29 @@ def render(name, isa_config_name=None):
                      reserved_memories=[], plic_machine_first=False,
                      chosen_properties=chosen_properties("nemu"),
                      bootargs="console=hvc0 earlycon=sbi")
+    elif name in {"boom-mem2g", "boom-fpga-mem2g"}:
+        fpga = name == "boom-fpga-mem2g"
+        gen = DTSGen(
+            compatible="freechips,rocketchip-boom",
+            model="boom-v4-difftest",
+            cpu_compatibles=["riscv"],
+            isa_extensions=DTSGen.sort_isa_extensions(
+                "i m a f d c zicsr zifencei zba zbb zbs".split()),
+            legacy_isa="rv64imafdc_zba_zbb_zbs_zicsr_zifencei",
+            mmu_type="riscv,sv39",
+            timebase_freq=1000000,
+            nr_harts=1,
+            clint_addr=0x02000000,
+            plic_addr=0x0c000000,
+            plic_ndev=31,
+            memories=[(DRAM_BASE, memory)],
+            reserved_memories=[],
+            uartlite_addr=None,
+            cpu_properties="riscv,pmpregions = <8>;\nriscv,pmpgranularity = <4>;",
+            chosen_properties=chosen_properties("spike"),
+            bootargs=("console=ttyS0,115200 earlycon=uart8250," +
+                      ("mmio32,0x310b0000" if fpga else "mmio,0x10000000")))
+        gen.add_device(serial16550("serial0") if fpga else serial_boom())
     elif name.startswith("spike"):
         nr_harts = 2 if name == "spike-2core" else 1
         gen = DTSGen(compatible="ucbbar,spike-bare-dev", model="ucbbar,spike-bare",

workloads/linux/spec2006/README.md

@@ -114,6 +114,17 @@ PROFILING=0 make linux/spec2006 BENCH=mcf INPUT=ref \
 
 The final `nemu-trap <status>` is always emitted for single-hart images.
 
+For BOOM FPGA, use its UART map and disable profiling markers:
+
+```sh
+make linux/spec2006 BENCH=mcf DEFAULT_DTB=boom-fpga-mem2g \
+  SPEC2006_PROFILING=0 SPEC2006_ISO=/path/to/cpu2006.iso -jN
+```
+
+`SPEC2006_PROFILING=0` is the workload-specific form of `PROFILING=0`;
+it also avoids passing a generic `PROFILING` Make variable into the kernel
+build. `boom-mem2g` selects the simulated UART for emulation instead.
+
 ## Build a multi-hart workload
 
 Add `MULTIHART=1 HARTS=<count>`, where `<count>` matches the QEMU checkpoint
@@ -234,6 +245,15 @@ The default SPEC cfg is the GCC 16 RVA23U64 no-vector configuration:
 workloads/linux/spec2006/configs/gcc16-linux-riscv64-rva23u64_novec.cfg
 ```
 
+For BOOM (`DEFAULT_DTB=boom` or `boom-*`), the default is the GCC 16
+RV64GC with Zba/Zbb/Zbs configuration:
+
+```text
+workloads/linux/spec2006/configs/gcc16-linux-riscv64-rv64gc_zba_zbb_zbs.cfg
+```
+
+It emits RV64GC/LP64D code with Zba, Zbb, and Zbs, without Zbc or V.
+
 For GCC 15, select:
 
 ```text

workloads/linux/spec2006/configs/gcc16-linux-riscv64-rv64gc_zba_zbb_zbs.cfg

@@ -0,0 +1,195 @@
+####################################################################
+# RISC-V Config file for SPEC CPU2006
+
+# Please see http://www.spec.org/cpu2006/Docs/config.html (also available in
+# the Docs directory of your SPEC tree) for details on config file setup.  The
+# config.html page has a list of all of the fields required for a full
+# publication ofresults.
+
+#####################################################################
+# System Under Test (SUT) Section
+
+# If it affects performance, you need to describe it, either in the
+# pre-defined fields or by adding it to the notes section. Replace the
+# setting below with the ones that match your machine.
+
+#######################################################################
+
+# Tester Description
+test_sponsor       = OpenXiangShan
+tester             = OpenXiangShan
+
+# System Description
+hw_model           = BOOM Medium
+hw_memory          = 2 GiB DDR
+hw_disk            = None
+hw_vendor          = Institute of Computing Technology, Chinese Academy of Sciences
+hw_other           = N/A
+hw_avail           = Dec-9999
+
+# CPU description
+# See http://www.spec.org/cpu2006/Docs/runrules.html#cpucount
+# for a discussion of these fields
+
+hw_cpu_name        = BOOM Medium rv64gc_zba_zbb_zbs
+hw_cpu_char        =
+hw_cpu_mhz         = 3000
+hw_fpu             = Integrated
+hw_nchips          = 1
+hw_ncores          = 1
+hw_ncoresperchip   = 1
+hw_nthreadspercore = 1
+hw_ncpuorder       = N/A
+
+# Cache description
+
+hw_pcache          = N/A
+hw_scache          = N/A
+hw_tcache          = N/A
+hw_ocache          = N/A
+
+# Tester description
+
+license_num     = 0
+
+# Operating system, file system
+
+sw_os           = Linux with OpenSBI firmware boot
+sw_file         = initramfs rootfs
+sw_state        = Single-user
+sw_other        = None
+
+## SW config
+sw_compiler        = gcc, g++ 16.1.0
+sw_avail           = Jul-2026
+sw_base_ptrsize    = 64-bit
+sw_peak_ptrsize    = 64-bit
+
+#######################################################################
+# End of SUT section
+# If this config file were to be applied to several SUTs, edits would
+# be needed only ABOVE this point.
+######################################################################
+
+ignore_errors = yes
+tune          = base
+basepeak      = no
+ext           = riscv_gcc16_base
+teeout        = yes
+teerunout     = yes
+output_format = asc, csv, html
+makeflags     = -j64
+
+reportable    = yes
+
+default=default=default=default:
+#####################################################################
+#
+# Compiler selection
+#
+#####################################################################
+
+COMPILER_PATH      = ${LLVM_INSTALL_PATH}
+JEMALLOC_PATH      = ${JEMALLOC_INSTALL_PATH}
+GCC_TOOLCHAIN_PATH = ${GNU_RISCV64_PATH}
+
+JEMALLOC_LIBS      = -Wl,-u,malloc -L$(JEMALLOC_PATH)/lib -ljemalloc -lm
+# jemalloc also exports C++ operator new/delete. Some SPEC C++ benchmarks
+# define replaceable allocation symbols in their own objects, so keep
+# muldefs enabled for the final static link.
+STATIC_LDFLAGS     = -z muldefs -static
+
+CC  = $(COMPILER_PATH)/bin/riscv64-unknown-linux-gnu-gcc -std=gnu89
+CXX = $(COMPILER_PATH)/bin/riscv64-unknown-linux-gnu-g++
+FC  = $(COMPILER_PATH)/bin/riscv64-unknown-linux-gnu-gfortran
+
+#####################################################################
+# Optimization
+#####################################################################
+
+int=base=default:
+    COPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=off -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=off -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+    EXTRA_LIBS      = $(JEMALLOC_LIBS)
+    EXTRA_LDFLAGS   = $(STATIC_LDFLAGS)
+
+fp=base=default:
+    COPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    FOPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+    EXTRA_LIBS      = $(JEMALLOC_LIBS)
+    EXTRA_LDFLAGS   = $(STATIC_LDFLAGS)
+
+int=peak=default:
+    COPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=off -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=off -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+    EXTRA_LIBS      = $(JEMALLOC_LIBS)
+    EXTRA_LDFLAGS   = $(STATIC_LDFLAGS)
+
+fp=peak=default:
+    COPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+    FOPTIMIZE       = -static -O3 -march=rv64gc_zba_zbb_zbs -ffast-math -flto  -ffp-contract=fast -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+    EXTRA_LIBS      = $(JEMALLOC_LIBS)
+    EXTRA_LDFLAGS   = $(STATIC_LDFLAGS)
+
+
+#####################################################################
+# 32/64 bit Portability Flags - all
+#####################################################################
+
+default=default=default=default:
+PORTABILITY    = -DSPEC_CPU_LP64
+
+#####################################################################
+# Portability Flags
+#####################################################################
+
+400.perlbench=default=default=default:
+CPORTABILITY   = -DSPEC_CPU_LINUX_X64 -std=gnu89
+
+401.bzip2=default=default=default:
+CPORTABILITY   = -std=gnu89
+
+416.gamess=default=default=default:
+CPORTABILITY   = -funconstrained-commons
+FPORTABILITY   = -std=legacy -funconstrained-commons -fno-strict-aliasing
+
+436.cactusADM=default=default=default:
+CPORTABILITY   = -std=gnu17
+
+462.libquantum=default=default=default:
+CPORTABILITY   = -DSPEC_CPU_LINUX
+
+464.h264ref=default=default=default:
+CPORTABILITY   = -fsigned-char
+
+482.sphinx3=default=default=default:
+CPORTABILITY   = -fsigned-char
+
+483.xalancbmk=default=default=default:
+CXXPORTABILITY = -DSPEC_CPU_LINUX -include cstring -Wno-c++11-narrowing -Wno-template-body
+
+453.povray=base=default=default:
+CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -flto  -ffp-contract=fast -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+453.povray=peak=default=default:
+CXXOPTIMIZE     = -static -O3 -march=rv64gc_zba_zbb_zbs -flto  -ffp-contract=fast -std=c++98 -fno-tree-vectorize -fno-tree-loop-vectorize -fno-strict-aliasing
+
+481.wrf=default=default=default:
+CPORTABILITY   = -DSPEC_CPU_CASE_FLAG -DSPEC_CPU_LINUX
+FPORTABILITY   = -std=legacy -fallow-argument-mismatch
+
+447.dealII=default=default=default:
+CXXPORTABILITY = -fpermissive -include cstring -std=c++11
+
+450.soplex=default=default=default:
+CXXPORTABILITY = -std=gnu++98
+
+#####################################################################
+# Notes
+#####################################################################