Hello Samuel,
This series adds the gnumach kernel-side implementation for the
aarch64 ABI Sergey landed in April 2024, plus the test-suite arms.
Patch 01 brings in the aarch64-only sources from bugaevc/wip-aarch64
verbatim, with Sergey as Author; the rest is mine.
The meaningful divergence from wip-aarch64 is what I left out:
roughly 150 files of cross-arch refactoring across kern/, ipc/, vm/,
device/intr.{c,h}, and the i386 tree. Each got replaced with a
smaller per-arch shim under aarch64/ so kern/bootstrap.c,
device/intr.{c,h}, kern/lock.h, and the i386 trees all stay
bit-identical to current master. The shared-file footprint outside
aarch64/ is four files: a new ELF constant, two missing decls plus
their include, and a linker-symbol filter extension.
The bootstrap reader handles two DTB conventions:
/chosen/multiboot,module (Sergey's, multi-module, fed by u-boot's
`fdt mknod` per aarch64/BOOTING) and the standard arm64
/chosen/linux,initrd-* so any stock bootloader works. Tests use the
multiboot,module path; linux,initrd runs but QEMU's `-initrd`
placement bumps into the single-segment vm_page heap. A
multi-segment heap is on my follow-up list.
Patches 11 and 12 each bundle two fixes that surfaced together when
I first delivered a bootstrap module end-to-end and ran
tests/test-thread-state-fp. I haven't reproduced them against
wip-aarch64 directly (at least the kvtophys-contract half of patch
11 plausibly belongs to this series' integration with upstream's
bootstrap.c rather than the imported code), but the fixes are needed
either way. Splits are recoverable if anyone would rather review
them separately.
Tested: 12/12 pass on x86_64, i686, and aarch64 under qemu. No
bare-metal validation yet. I plan to build bootable images and boot
the kernel on Apple M1 / Raspberry Pi (aarch64) and an x86_64 box
(x86_64 + i686). Help on any of these welcome.
I used substantial AI assistance (Claude Code) on this. Every line is
mine and the FSF assignment is on its way. Disclosing in the cover
rather than per-commit since bug-hurd has no precedent either way;
happy to add `Assisted-by:` per the Linux kernel's December 2025 form
(https://docs.kernel.org/process/coding-assistants.html) if you'd
rather see that.
Sergey, especially interested in your read on patches 2 and 10's
choice of small per-arch shims over rewriting shared code, and on
whether the four test-time bugs in 11-12 read as wip-aarch64-inherent
or as artefacts of how this series wires the import to upstream's
bootstrap.c.
Published at:
https://github.com/paulofduarte/gnumach/tree/aarch64-tests
Paulo
Paulo Duarte (17):
aarch64: add per-arch lock.h shim for kern/lock.h's machine include
aarch64: drop the ramdisk driver from the import
aarch64: stub hpclock hooks for current master's clock subsystem
mach: add EM_AARCH64 to the ELF machine constant list
ipc: declare copyinmsg / copyoutmsg in <ipc/copy_user.h>
build: extend ld_magic_routines for the aarch64 PIE kernel
aarch64: move boot stack out of .bss so zero_out_bss doesn't clobber
it
device/dtb: read 8-byte cells as two 4-byte loads to survive pre-MMU
access
aarch64: route bootstrap modules through kern/bootstrap.c
aarch64: complete end-to-end bootstrap module delivery
aarch64: fix AARCH64_FLOAT_STATE save/restore and setstatus alignment
aarch64: accept linux,initrd-* DTB nodes as bootstrap modules
tests: add aarch64 arm to start.S
tests: support aarch64 in the test harness (u-boot + multiboot,module)
tests: add aarch64 arm to testlib_thread_start.c
tests: aarch64 arms for the per-arch test bodies
tests: dedicated multiboot,module DTB bootstrap test (aarch64)
Sergey Bugaev (1):
aarch64: import the kernel-side port from bugaevc/wip-aarch64
Makefile.am | 5 +-
aarch64/BOOTING | 62 +
aarch64/Makefrag.am | 80 ++
aarch64/aarch64/aarch64asm.sym | 41 +
aarch64/aarch64/bits/esr.h | 84 ++
aarch64/aarch64/bits/hcr.h | 17 +
aarch64/aarch64/bits/id_aa64.h | 148 ++
aarch64/aarch64/bits/mair.h | 12 +
aarch64/aarch64/bits/pte.h | 33 +
aarch64/aarch64/bits/sctlr.h | 20 +
aarch64/aarch64/bits/spsr.h | 42 +
aarch64/aarch64/bits/tcr.h | 18 +
aarch64/aarch64/boot.S | 106 ++
aarch64/aarch64/conf.c | 53 +
aarch64/aarch64/cpu_number.h | 36 +
aarch64/aarch64/cswitch.S | 97 ++
aarch64/aarch64/db_machdep.h | 25 +
aarch64/aarch64/fpu.c | 157 +++
aarch64/aarch64/fpu.h | 27 +
aarch64/aarch64/hwcaps.c | 164 +++
aarch64/aarch64/hwcaps.h | 31 +
aarch64/aarch64/ipl.h | 24 +
aarch64/aarch64/irq.c | 29 +
aarch64/aarch64/irq.h | 76 +
aarch64/aarch64/lock.h | 33 +
aarch64/aarch64/locore.S | 837 +++++++++++
aarch64/aarch64/locore.h | 50 +
aarch64/aarch64/loose_ends.h | 24 +
aarch64/aarch64/mach_aarch64.c | 45 +
aarch64/aarch64/mach_param.h | 24 +
aarch64/aarch64/machine_routines.h | 27 +
aarch64/aarch64/model_dep.c | 527 +++++++
aarch64/aarch64/model_dep.h | 61 +
aarch64/aarch64/mp_desc.h | 22 +
aarch64/aarch64/pcb.c | 396 ++++++
aarch64/aarch64/pcb.h | 66 +
aarch64/aarch64/percpu.c | 28 +
aarch64/aarch64/percpu.h | 68 +
aarch64/aarch64/pmap.c | 1248 +++++++++++++++++
aarch64/aarch64/pmap.h | 95 ++
aarch64/aarch64/setjmp.h | 19 +
aarch64/aarch64/smp.h | 29 +
aarch64/aarch64/spl.h | 100 ++
aarch64/aarch64/strings.c | 59 +
aarch64/aarch64/task.c | 38 +
aarch64/aarch64/task.h | 55 +
aarch64/aarch64/thread.h | 67 +
aarch64/aarch64/trap.c | 683 +++++++++
aarch64/aarch64/trap.h | 47 +
aarch64/aarch64/undef.c | 31 +
aarch64/aarch64/vm_param.h | 56 +
aarch64/aarch64/xpr.h | 25 +
aarch64/arm/gic-v2.c | 194 +++
aarch64/arm/gic-v2.h | 38 +
aarch64/arm/pl011.c | 207 +++
aarch64/arm/pl011.h | 24 +
aarch64/arm/psci.c | 152 ++
aarch64/arm/psci.h | 29 +
aarch64/arm/timer.c | 115 ++
aarch64/arm/timer.h | 29 +
aarch64/configfrag.ac | 4 +
aarch64/include/mach/aarch64/exception.h | 25 +-
aarch64/include/mach/aarch64/exec/elf.h | 44 +
.../include/mach/aarch64/mach_aarch64.defs | 2 +-
.../include/mach/aarch64/mach_aarch64_types.h | 2 +-
.../include/mach/aarch64/machine_types.defs | 21 +-
aarch64/include/mach/aarch64/multiboot.h | 61 +
aarch64/include/mach/aarch64/thread_status.h | 2 +
aarch64/include/mach/aarch64/vm_param.h | 4 +
aarch64/ldscript | 35 +
device/dtb.c | 440 ++++++
device/dtb.h | 123 ++
include/mach/exec/elf.h | 1 +
ipc/copy_user.h | 15 +
kern/exception.c | 1 +
tests/Makefrag.am | 24 +-
tests/run-multiboot-module-qemu.sh.template | 45 +
tests/run-qemu.sh.template | 2 +-
tests/start.S | 10 +
tests/test-machmsg.c | 15 +
tests/test-syscalls.c | 83 +-
tests/test-thread-state-fp.c | 123 ++
tests/testlib_thread_start.c | 21 +
tests/uboot.script.template | 71 +
tests/user-qemu.mk | 135 +-
85 files changed, 8203 insertions(+), 41 deletions(-)
create mode 100644 aarch64/BOOTING
create mode 100644 aarch64/aarch64/aarch64asm.sym
create mode 100644 aarch64/aarch64/bits/esr.h
create mode 100644 aarch64/aarch64/bits/hcr.h
create mode 100644 aarch64/aarch64/bits/id_aa64.h
create mode 100644 aarch64/aarch64/bits/mair.h
create mode 100644 aarch64/aarch64/bits/pte.h
create mode 100644 aarch64/aarch64/bits/sctlr.h
create mode 100644 aarch64/aarch64/bits/spsr.h
create mode 100644 aarch64/aarch64/bits/tcr.h
create mode 100644 aarch64/aarch64/boot.S
create mode 100644 aarch64/aarch64/conf.c
create mode 100644 aarch64/aarch64/cpu_number.h
create mode 100644 aarch64/aarch64/cswitch.S
create mode 100644 aarch64/aarch64/db_machdep.h
create mode 100644 aarch64/aarch64/fpu.c
create mode 100644 aarch64/aarch64/fpu.h
create mode 100644 aarch64/aarch64/hwcaps.c
create mode 100644 aarch64/aarch64/hwcaps.h
create mode 100644 aarch64/aarch64/ipl.h
create mode 100644 aarch64/aarch64/irq.c
create mode 100644 aarch64/aarch64/irq.h
create mode 100644 aarch64/aarch64/lock.h
create mode 100644 aarch64/aarch64/locore.S
create mode 100644 aarch64/aarch64/locore.h
create mode 100644 aarch64/aarch64/loose_ends.h
create mode 100644 aarch64/aarch64/mach_aarch64.c
create mode 100644 aarch64/aarch64/mach_param.h
create mode 100644 aarch64/aarch64/machine_routines.h
create mode 100644 aarch64/aarch64/model_dep.c
create mode 100644 aarch64/aarch64/model_dep.h
create mode 100644 aarch64/aarch64/mp_desc.h
create mode 100644 aarch64/aarch64/pcb.c
create mode 100644 aarch64/aarch64/pcb.h
create mode 100644 aarch64/aarch64/percpu.c
create mode 100644 aarch64/aarch64/percpu.h
create mode 100644 aarch64/aarch64/pmap.c
create mode 100644 aarch64/aarch64/pmap.h
create mode 100644 aarch64/aarch64/setjmp.h
create mode 100644 aarch64/aarch64/smp.h
create mode 100644 aarch64/aarch64/spl.h
create mode 100644 aarch64/aarch64/strings.c
create mode 100644 aarch64/aarch64/task.c
create mode 100644 aarch64/aarch64/task.h
create mode 100644 aarch64/aarch64/thread.h
create mode 100644 aarch64/aarch64/trap.c
create mode 100644 aarch64/aarch64/trap.h
create mode 100644 aarch64/aarch64/undef.c
create mode 100644 aarch64/aarch64/vm_param.h
create mode 100644 aarch64/aarch64/xpr.h
create mode 100644 aarch64/arm/gic-v2.c
create mode 100644 aarch64/arm/gic-v2.h
create mode 100644 aarch64/arm/pl011.c
create mode 100644 aarch64/arm/pl011.h
create mode 100644 aarch64/arm/psci.c
create mode 100644 aarch64/arm/psci.h
create mode 100644 aarch64/arm/timer.c
create mode 100644 aarch64/arm/timer.h
create mode 100644 aarch64/include/mach/aarch64/exec/elf.h
create mode 100644 aarch64/include/mach/aarch64/multiboot.h
create mode 100644 aarch64/ldscript
create mode 100644 device/dtb.c
create mode 100644 device/dtb.h
create mode 100644 tests/run-multiboot-module-qemu.sh.template
create mode 100644 tests/uboot.script.template
--
2.54.0
