[RFC PATCH 00/25] Upstream kvx Linux port

Yann Sionneau
2023-01-03T17:00:54Z

This patch series adds support for the kv3-1 CPU architecture of the kvx family
found in the Coolidge (aka MPPA3-80) SoC of Kalray.

This is an RFC, since kvx support is not yet upstreamed into gcc/binutils,
therefore this patch series cannot be merged into Linux for now.

The goal is to have preliminary reviews and to fix problems early.

The Kalray VLIW processor family (kvx) has the following features:
* 32/64 bits execution mode
* 6-issue VLIW architecture
* 64 x 64bits general purpose registers
* SIMD instructions
* little-endian
* deep learning co-processor

Kalray kv3-1 core which is the third of the kvx family is embedded in Kalray
Coolidge SoC currently used on K200 and K200-LP boards.

The Coolidge SoC contains 5 clusters each of which is made of:
* 4MiB of on-chip memory (SMEM)
* 1 dedicated safety/security core (kv3-1 core).
* 16 PEs (Processing Elements) (kv3-1 cores).
* 16 Co-processors (one per PE)
* 2 Crypto accelerators

The Coolidge SoC contains the following features:
* 5 Clusters
* 2 100G Ethernet controllers
* 8 PCIe GEN4 controllers (Root Complex and Endpoint capable)
* 2 USB 2.0 controllers
* 1 Octal SPI-NOR flash controller
* 1 eMMC controller
* 3 Quad SPI controllers
* 6 UART
* 5 I2C controllers (3 of which are SMBus capable)
* 4 CAN controllers
* 1 OTP memory

A kvx toolchain can be built using:
# install dependencies: texinfo bison flex libgmp-dev libmpc-dev libmpfr-dev
$ git clone https://github.com/kalray/build-scripts
$ cd build-scripts
$ source last.refs
$ ./build-kvx-xgcc.sh output

The kvx toolchain will be installed in the "output" directory.

A buildroot image (kernel+rootfs) and toolchain can be built using:
$ git clone -b coolidge-for-upstream https://github.com/kalray/buildroot
$ cd buildroot
$ make O=build_kvx kvx_defconfig
$ make O=build_kvx

The vmlinux image can be found in buildroot/build_kvx/images/vmlinux.

If you are just interested in building the Linux kernel with no rootfs you can
just do this with the kvx-elf- toolchain:
$ make ARCH=kvx O=build_kvx CROSS_COMPILE=kvx-elf- default_defconfig
$ make ARCH=kvx O=build_kvx CROSS_COMPILE=kvx-elf- -j$(($(nproc) + 1))

The vmlinux ELF can be run with qemu by doing:
# install dependencies: ninja pkg-config libglib-2.0-dev cmake libfdt-dev libpixman-1-dev zlib1g-dev
$ git clone https://github.com/kalray/qemu-builder
$ cd qemu-builder
$ git submodule update --init
$ make -j$(($(nproc) + 1))
$ ./qemu-system-kvx -m 1024 -nographic -kernel <path/to/vmlinux>

Yann Sionneau (25):
Documentation: kvx: Add basic documentation
kvx: Add ELF-related definitions
kvx: Add build infrastructure
kvx: Add CPU definition headers
kvx: Add atomic/locking headers
kvx: Add other common headers
kvx: Add boot and setup routines
kvx: Add exception/interrupt handling
kvx: irqchip: Add support for irq controllers
kvx: Add process management
kvx: Add memory management
kvx: Add system call support
kvx: Add signal handling support
kvx: Add ELF relocations and module support
kvx: Add misc common routines
kvx: Add some library functions
kvx: Add multi-processor (SMP) support
kvx: Add kvx default config file
kvx: power: scall poweroff driver
kvx: gdb: add kvx related gdb helpers
kvx: Add support for ftrace
kvx: Add support for jump labels
kvx: Add debugging related support
kvx: Add support for CPU Perf Monitors
kvx: Add support for cpuinfo

.../kalray,kvx-core-intc.txt | 22 +
.../devicetree/bindings/perf/kalray-pm.txt | 21 +
Documentation/kvx/kvx-exceptions.txt | 246 +
Documentation/kvx/kvx-iommu.txt | 183 +
Documentation/kvx/kvx-mmu.txt | 272 +
Documentation/kvx/kvx-smp.txt | 36 +
Documentation/kvx/kvx.txt | 268 +
arch/kvx/Kconfig | 249 +
arch/kvx/Kconfig.debug | 70 +
arch/kvx/Makefile | 52 +
arch/kvx/configs/default_defconfig | 130 +
arch/kvx/include/asm/Kbuild | 20 +
arch/kvx/include/asm/asm-prototypes.h | 14 +
arch/kvx/include/asm/atomic.h | 104 +
arch/kvx/include/asm/barrier.h | 15 +
arch/kvx/include/asm/bitops.h | 207 +
arch/kvx/include/asm/bitrev.h | 32 +
arch/kvx/include/asm/break_hook.h | 69 +
arch/kvx/include/asm/bug.h | 67 +
arch/kvx/include/asm/cache.h | 46 +
arch/kvx/include/asm/cacheflush.h | 181 +
arch/kvx/include/asm/clocksource.h | 17 +
arch/kvx/include/asm/cmpxchg.h | 185 +
arch/kvx/include/asm/current.h | 22 +
arch/kvx/include/asm/dame.h | 31 +
arch/kvx/include/asm/debug.h | 35 +
arch/kvx/include/asm/elf.h | 155 +
arch/kvx/include/asm/fixmap.h | 47 +
arch/kvx/include/asm/ftrace.h | 41 +
arch/kvx/include/asm/futex.h | 141 +
arch/kvx/include/asm/hardirq.h | 14 +
arch/kvx/include/asm/hugetlb.h | 36 +
arch/kvx/include/asm/hw_breakpoint.h | 72 +
arch/kvx/include/asm/hw_irq.h | 14 +
arch/kvx/include/asm/insns.h | 16 +
arch/kvx/include/asm/insns_defs.h | 197 +
arch/kvx/include/asm/io.h | 34 +
arch/kvx/include/asm/ipi.h | 16 +
arch/kvx/include/asm/irqflags.h | 58 +
arch/kvx/include/asm/jump_label.h | 59 +
arch/kvx/include/asm/l2_cache.h | 75 +
arch/kvx/include/asm/l2_cache_defs.h | 64 +
arch/kvx/include/asm/linkage.h | 13 +
arch/kvx/include/asm/mem_map.h | 44 +
arch/kvx/include/asm/mmu.h | 296 +
arch/kvx/include/asm/mmu_context.h | 156 +
arch/kvx/include/asm/mmu_stats.h | 38 +
arch/kvx/include/asm/page.h | 187 +
arch/kvx/include/asm/page_size.h | 29 +
arch/kvx/include/asm/pci.h | 36 +
arch/kvx/include/asm/perf_event.h | 90 +
arch/kvx/include/asm/pgalloc.h | 101 +
arch/kvx/include/asm/pgtable-bits.h | 102 +
arch/kvx/include/asm/pgtable.h | 451 ++
arch/kvx/include/asm/privilege.h | 211 +
arch/kvx/include/asm/processor.h | 176 +
arch/kvx/include/asm/ptrace.h | 217 +
arch/kvx/include/asm/pwr_ctrl.h | 45 +
arch/kvx/include/asm/rm_fw.h | 16 +
arch/kvx/include/asm/sections.h | 18 +
arch/kvx/include/asm/setup.h | 29 +
arch/kvx/include/asm/sfr.h | 107 +
arch/kvx/include/asm/sfr_defs.h | 5028 +++++++++++++++++
arch/kvx/include/asm/smp.h | 42 +
arch/kvx/include/asm/sparsemem.h | 15 +
arch/kvx/include/asm/spinlock.h | 16 +
arch/kvx/include/asm/spinlock_types.h | 17 +
arch/kvx/include/asm/stackprotector.h | 47 +
arch/kvx/include/asm/stacktrace.h | 44 +
arch/kvx/include/asm/string.h | 20 +
arch/kvx/include/asm/swab.h | 48 +
arch/kvx/include/asm/switch_to.h | 21 +
arch/kvx/include/asm/symbols.h | 16 +
arch/kvx/include/asm/sys_arch.h | 51 +
arch/kvx/include/asm/syscall.h | 73 +
arch/kvx/include/asm/syscalls.h | 21 +
arch/kvx/include/asm/thread_info.h | 78 +
arch/kvx/include/asm/timex.h | 20 +
arch/kvx/include/asm/tlb.h | 24 +
arch/kvx/include/asm/tlb_defs.h | 131 +
arch/kvx/include/asm/tlbflush.h | 58 +
arch/kvx/include/asm/traps.h | 76 +
arch/kvx/include/asm/types.h | 12 +
arch/kvx/include/asm/uaccess.h | 324 ++
arch/kvx/include/asm/unistd.h | 11 +
arch/kvx/include/asm/vermagic.h | 12 +
arch/kvx/include/asm/vmalloc.h | 10 +
arch/kvx/include/uapi/asm/Kbuild | 1 +
arch/kvx/include/uapi/asm/bitsperlong.h | 14 +
arch/kvx/include/uapi/asm/byteorder.h | 12 +
arch/kvx/include/uapi/asm/cachectl.h | 25 +
arch/kvx/include/uapi/asm/ptrace.h | 114 +
arch/kvx/include/uapi/asm/sigcontext.h | 16 +
arch/kvx/include/uapi/asm/unistd.h | 16 +
arch/kvx/kernel/Makefile | 27 +
arch/kvx/kernel/asm-offsets.c | 157 +
arch/kvx/kernel/break_hook.c | 77 +
arch/kvx/kernel/common.c | 11 +
arch/kvx/kernel/cpuinfo.c | 96 +
arch/kvx/kernel/dame_handler.c | 113 +
arch/kvx/kernel/debug.c | 64 +
arch/kvx/kernel/entry.S | 1759 ++++++
arch/kvx/kernel/ftrace.c | 339 ++
arch/kvx/kernel/head.S | 612 ++
arch/kvx/kernel/hw_breakpoint.c | 556 ++
arch/kvx/kernel/insns.c | 146 +
arch/kvx/kernel/io.c | 96 +
arch/kvx/kernel/irq.c | 78 +
arch/kvx/kernel/jump_label.c | 34 +
arch/kvx/kernel/kvx_ksyms.c | 29 +
arch/kvx/kernel/l2_cache.c | 448 ++
arch/kvx/kernel/mcount.S | 340 ++
arch/kvx/kernel/module.c | 148 +
arch/kvx/kernel/perf_event.c | 609 ++
arch/kvx/kernel/process.c | 212 +
arch/kvx/kernel/prom.c | 24 +
arch/kvx/kernel/ptrace.c | 461 ++
arch/kvx/kernel/reset.c | 37 +
arch/kvx/kernel/return_address.c | 55 +
arch/kvx/kernel/setup.c | 178 +
arch/kvx/kernel/signal.c | 266 +
arch/kvx/kernel/smp.c | 110 +
arch/kvx/kernel/smpboot.c | 127 +
arch/kvx/kernel/stacktrace.c | 173 +
arch/kvx/kernel/sys_kvx.c | 58 +
arch/kvx/kernel/syscall_table.c | 19 +
arch/kvx/kernel/time.c | 242 +
arch/kvx/kernel/traps.c | 243 +
arch/kvx/kernel/vdso.c | 87 +
arch/kvx/kernel/vmlinux.lds.S | 173 +
arch/kvx/lib/Makefile | 6 +
arch/kvx/lib/clear_page.S | 40 +
arch/kvx/lib/copy_page.S | 90 +
arch/kvx/lib/delay.c | 39 +
arch/kvx/lib/memcpy.c | 70 +
arch/kvx/lib/memset.S | 351 ++
arch/kvx/lib/strlen.S | 122 +
arch/kvx/lib/usercopy.S | 90 +
arch/kvx/mm/Makefile | 10 +
arch/kvx/mm/cacheflush.c | 154 +
arch/kvx/mm/dma-mapping.c | 95 +
arch/kvx/mm/extable.c | 24 +
arch/kvx/mm/fault.c | 264 +
arch/kvx/mm/hugetlbpage.c | 317 ++
arch/kvx/mm/init.c | 527 ++
arch/kvx/mm/kernel_rwx.c | 228 +
arch/kvx/mm/mmap.c | 31 +
arch/kvx/mm/mmu.c | 204 +
arch/kvx/mm/mmu_stats.c | 94 +
arch/kvx/mm/tlb.c | 433 ++
arch/kvx/platform/Makefile | 7 +
arch/kvx/platform/ipi.c | 110 +
arch/kvx/platform/pwr_ctrl.c | 93 +
drivers/irqchip/Kconfig | 27 +
drivers/irqchip/Makefile | 4 +
drivers/irqchip/irq-kvx-apic-gic.c | 349 ++
drivers/irqchip/irq-kvx-apic-mailbox.c | 465 ++
drivers/irqchip/irq-kvx-core-intc.c | 82 +
drivers/irqchip/irq-kvx-itgen.c | 224 +
drivers/power/reset/kvx-scall-poweroff.c | 53 +
include/linux/cpuhotplug.h | 2 +
include/linux/irqchip/irq-kvx-apic-gic.h | 21 +
include/linux/irqchip/irq-kvx-apic-mailbox.h | 29 +
include/linux/irqchip/irq-kvx-itgen.h | 24 +
include/uapi/linux/audit.h | 1 +
include/uapi/linux/elf-em.h | 1 +
include/uapi/linux/elf.h | 1 +
scripts/gdb/arch/Makefile | 11 +
scripts/gdb/arch/__init__.py | 1 +
scripts/gdb/arch/kvx/Makefile | 25 +
scripts/gdb/arch/kvx/__init__.py | 1 +
scripts/gdb/arch/kvx/constants.py.in | 74 +
scripts/gdb/arch/kvx/mmu.py | 199 +
scripts/gdb/arch/kvx/page_table_walk.py | 207 +
tools/include/uapi/asm/bitsperlong.h | 2 +
175 files changed, 25814 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/kalray,kvx-core-intc.txt
create mode 100644 Documentation/devicetree/bindings/perf/kalray-pm.txt
create mode 100644 Documentation/kvx/kvx-exceptions.txt
create mode 100644 Documentation/kvx/kvx-iommu.txt
create mode 100644 Documentation/kvx/kvx-mmu.txt
create mode 100644 Documentation/kvx/kvx-smp.txt
create mode 100644 Documentation/kvx/kvx.txt
create mode 100644 arch/kvx/Kconfig
create mode 100644 arch/kvx/Kconfig.debug
create mode 100644 arch/kvx/Makefile
create mode 100644 arch/kvx/configs/default_defconfig
create mode 100644 arch/kvx/include/asm/Kbuild
create mode 100644 arch/kvx/include/asm/asm-prototypes.h
create mode 100644 arch/kvx/include/asm/atomic.h
create mode 100644 arch/kvx/include/asm/barrier.h
create mode 100644 arch/kvx/include/asm/bitops.h
create mode 100644 arch/kvx/include/asm/bitrev.h
create mode 100644 arch/kvx/include/asm/break_hook.h
create mode 100644 arch/kvx/include/asm/bug.h
create mode 100644 arch/kvx/include/asm/cache.h
create mode 100644 arch/kvx/include/asm/cacheflush.h
create mode 100644 arch/kvx/include/asm/clocksource.h
create mode 100644 arch/kvx/include/asm/cmpxchg.h
create mode 100644 arch/kvx/include/asm/current.h
create mode 100644 arch/kvx/include/asm/dame.h
create mode 100644 arch/kvx/include/asm/debug.h
create mode 100644 arch/kvx/include/asm/elf.h
create mode 100644 arch/kvx/include/asm/fixmap.h
create mode 100644 arch/kvx/include/asm/ftrace.h
create mode 100644 arch/kvx/include/asm/futex.h
create mode 100644 arch/kvx/include/asm/hardirq.h
create mode 100644 arch/kvx/include/asm/hugetlb.h
create mode 100644 arch/kvx/include/asm/hw_breakpoint.h
create mode 100644 arch/kvx/include/asm/hw_irq.h
create mode 100644 arch/kvx/include/asm/insns.h
create mode 100644 arch/kvx/include/asm/insns_defs.h
create mode 100644 arch/kvx/include/asm/io.h
create mode 100644 arch/kvx/include/asm/ipi.h
create mode 100644 arch/kvx/include/asm/irqflags.h
create mode 100644 arch/kvx/include/asm/jump_label.h
create mode 100644 arch/kvx/include/asm/l2_cache.h
create mode 100644 arch/kvx/include/asm/l2_cache_defs.h
create mode 100644 arch/kvx/include/asm/linkage.h
create mode 100644 arch/kvx/include/asm/mem_map.h
create mode 100644 arch/kvx/include/asm/mmu.h
create mode 100644 arch/kvx/include/asm/mmu_context.h
create mode 100644 arch/kvx/include/asm/mmu_stats.h
create mode 100644 arch/kvx/include/asm/page.h
create mode 100644 arch/kvx/include/asm/page_size.h
create mode 100644 arch/kvx/include/asm/pci.h
create mode 100644 arch/kvx/include/asm/perf_event.h
create mode 100644 arch/kvx/include/asm/pgalloc.h
create mode 100644 arch/kvx/include/asm/pgtable-bits.h
create mode 100644 arch/kvx/include/asm/pgtable.h
create mode 100644 arch/kvx/include/asm/privilege.h
create mode 100644 arch/kvx/include/asm/processor.h
create mode 100644 arch/kvx/include/asm/ptrace.h
create mode 100644 arch/kvx/include/asm/pwr_ctrl.h
create mode 100644 arch/kvx/include/asm/rm_fw.h
create mode 100644 arch/kvx/include/asm/sections.h
create mode 100644 arch/kvx/include/asm/setup.h
create mode 100644 arch/kvx/include/asm/sfr.h
create mode 100644 arch/kvx/include/asm/sfr_defs.h
create mode 100644 arch/kvx/include/asm/smp.h
create mode 100644 arch/kvx/include/asm/sparsemem.h
create mode 100644 arch/kvx/include/asm/spinlock.h
create mode 100644 arch/kvx/include/asm/spinlock_types.h
create mode 100644 arch/kvx/include/asm/stackprotector.h
create mode 100644 arch/kvx/include/asm/stacktrace.h
create mode 100644 arch/kvx/include/asm/string.h
create mode 100644 arch/kvx/include/asm/swab.h
create mode 100644 arch/kvx/include/asm/switch_to.h
create mode 100644 arch/kvx/include/asm/symbols.h
create mode 100644 arch/kvx/include/asm/sys_arch.h
create mode 100644 arch/kvx/include/asm/syscall.h
create mode 100644 arch/kvx/include/asm/syscalls.h
create mode 100644 arch/kvx/include/asm/thread_info.h
create mode 100644 arch/kvx/include/asm/timex.h
create mode 100644 arch/kvx/include/asm/tlb.h
create mode 100644 arch/kvx/include/asm/tlb_defs.h
create mode 100644 arch/kvx/include/asm/tlbflush.h
create mode 100644 arch/kvx/include/asm/traps.h
create mode 100644 arch/kvx/include/asm/types.h
create mode 100644 arch/kvx/include/asm/uaccess.h
create mode 100644 arch/kvx/include/asm/unistd.h
create mode 100644 arch/kvx/include/asm/vermagic.h
create mode 100644 arch/kvx/include/asm/vmalloc.h
create mode 100644 arch/kvx/include/uapi/asm/Kbuild
create mode 100644 arch/kvx/include/uapi/asm/bitsperlong.h
create mode 100644 arch/kvx/include/uapi/asm/byteorder.h
create mode 100644 arch/kvx/include/uapi/asm/cachectl.h
create mode 100644 arch/kvx/include/uapi/asm/ptrace.h
create mode 100644 arch/kvx/include/uapi/asm/sigcontext.h
create mode 100644 arch/kvx/include/uapi/asm/unistd.h
create mode 100644 arch/kvx/kernel/Makefile
create mode 100644 arch/kvx/kernel/asm-offsets.c
create mode 100644 arch/kvx/kernel/break_hook.c
create mode 100644 arch/kvx/kernel/common.c
create mode 100644 arch/kvx/kernel/cpuinfo.c
create mode 100644 arch/kvx/kernel/dame_handler.c
create mode 100644 arch/kvx/kernel/debug.c
create mode 100644 arch/kvx/kernel/entry.S
create mode 100644 arch/kvx/kernel/ftrace.c
create mode 100644 arch/kvx/kernel/head.S
create mode 100644 arch/kvx/kernel/hw_breakpoint.c
create mode 100644 arch/kvx/kernel/insns.c
create mode 100644 arch/kvx/kernel/io.c
create mode 100644 arch/kvx/kernel/irq.c
create mode 100644 arch/kvx/kernel/jump_label.c
create mode 100644 arch/kvx/kernel/kvx_ksyms.c
create mode 100644 arch/kvx/kernel/l2_cache.c
create mode 100644 arch/kvx/kernel/mcount.S
create mode 100644 arch/kvx/kernel/module.c
create mode 100644 arch/kvx/kernel/perf_event.c
create mode 100644 arch/kvx/kernel/process.c
create mode 100644 arch/kvx/kernel/prom.c
create mode 100644 arch/kvx/kernel/ptrace.c
create mode 100644 arch/kvx/kernel/reset.c
create mode 100644 arch/kvx/kernel/return_address.c
create mode 100644 arch/kvx/kernel/setup.c
create mode 100644 arch/kvx/kernel/signal.c
create mode 100644 arch/kvx/kernel/smp.c
create mode 100644 arch/kvx/kernel/smpboot.c
create mode 100644 arch/kvx/kernel/stacktrace.c
create mode 100644 arch/kvx/kernel/sys_kvx.c
create mode 100644 arch/kvx/kernel/syscall_table.c
create mode 100644 arch/kvx/kernel/time.c
create mode 100644 arch/kvx/kernel/traps.c
create mode 100644 arch/kvx/kernel/vdso.c
create mode 100644 arch/kvx/kernel/vmlinux.lds.S
create mode 100644 arch/kvx/lib/Makefile
create mode 100644 arch/kvx/lib/clear_page.S
create mode 100644 arch/kvx/lib/copy_page.S
create mode 100644 arch/kvx/lib/delay.c
create mode 100644 arch/kvx/lib/memcpy.c
create mode 100644 arch/kvx/lib/memset.S
create mode 100644 arch/kvx/lib/strlen.S
create mode 100644 arch/kvx/lib/usercopy.S
create mode 100644 arch/kvx/mm/Makefile
create mode 100644 arch/kvx/mm/cacheflush.c
create mode 100644 arch/kvx/mm/dma-mapping.c
create mode 100644 arch/kvx/mm/extable.c
create mode 100644 arch/kvx/mm/fault.c
create mode 100644 arch/kvx/mm/hugetlbpage.c
create mode 100644 arch/kvx/mm/init.c
create mode 100644 arch/kvx/mm/kernel_rwx.c
create mode 100644 arch/kvx/mm/mmap.c
create mode 100644 arch/kvx/mm/mmu.c
create mode 100644 arch/kvx/mm/mmu_stats.c
create mode 100644 arch/kvx/mm/tlb.c
create mode 100644 arch/kvx/platform/Makefile
create mode 100644 arch/kvx/platform/ipi.c
create mode 100644 arch/kvx/platform/pwr_ctrl.c
create mode 100644 drivers/irqchip/irq-kvx-apic-gic.c
create mode 100644 drivers/irqchip/irq-kvx-apic-mailbox.c
create mode 100644 drivers/irqchip/irq-kvx-core-intc.c
create mode 100644 drivers/irqchip/irq-kvx-itgen.c
create mode 100644 drivers/power/reset/kvx-scall-poweroff.c
create mode 100644 include/linux/irqchip/irq-kvx-apic-gic.h
create mode 100644 include/linux/irqchip/irq-kvx-apic-mailbox.h
create mode 100644 include/linux/irqchip/irq-kvx-itgen.h
create mode 100644 scripts/gdb/arch/Makefile
create mode 100644 scripts/gdb/arch/__init__.py
create mode 100644 scripts/gdb/arch/kvx/Makefile
create mode 100644 scripts/gdb/arch/kvx/__init__.py
create mode 100644 scripts/gdb/arch/kvx/constants.py.in
create mode 100644 scripts/gdb/arch/kvx/mmu.py
create mode 100644 scripts/gdb/arch/kvx/page_table_walk.py

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2.37.2