[PATCH v7 00/11] Allow x86 to unflatten DTs

[Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>]

Hi,

I've fixed a couple of issues with the 2 refactors.

  1. The proposed fixup by Daniel went ahead and was lost on rebase. v7 includes
     it back.
  2. The pre-requisite rename of bootfdt.c to bootinfo-fdt.c was mis-squashed on
     rebase too. This, too, has been restored to keep a tidier history.

Otherwise, same old.

pipeline: 
https://gitlab.com/xen-project/people/agvallejo/xen/-/commit/0b28c9551df54aaf662d03e2f2a07e446a9e4c4d

v6: 
https://lore.kernel.org/xen-devel/20250708180721.2338036-1-alejandro.garciavallejo@xxxxxxx/
v5: https://lore.kernel.org/xen-devel/20250701105706.86133-1-agarciav@xxxxxxx/
v4: https://lore.kernel.org/xen-devel/20250620182859.23378-1-agarciav@xxxxxxx/
v3: https://lore.kernel.org/xen-devel/20250613151612.754222-1-agarciav@xxxxxxx/
v3: https://lore.kernel.org/xen-devel/20250613151612.754222-1-agarciav@xxxxxxx/
v2: https://lore.kernel.org/xen-devel/20250605194810.2782031-1-agarciav@xxxxxxx/
v1: https://lore.kernel.org/xen-devel/20250530120242.39398-1-agarciav@xxxxxxx/

Original cover letter
=====================

This is the aftermath of this discussion:

  
https://lore.kernel.org/xen-devel/DA1WWRUQLCAG.ZTVR1HXJ85V0@xxxxxxx/https://lore.kernel.org/xen-devel/DA1WWRUQLCAG.ZTVR1HXJ85V0@xxxxxxx/

It's a first round of cleanup and preparation to have a much easier time
later when integrating dom0less boot into hyperlaunch.

The refactor on device-tree/ is _fine_ by I'm open to other suggestions
to achieve the same thing. In particular, after this series x86 can
unflatten the DT host device tree when it has CONFIG_DOM0LESS_BOOT set,
which enables the builder to use factored-out functions from
dom0less-build.c (not done here).

The diffstat is deceptive because I renamed a large file and then
created a new file with the same name. There aren't that many LoC
changes.


Alejandro Vallejo (11):
  x86: Replace arch-specific boot_module with common one
  xen: Refactor kernel_info to have a header like boot_domain
  x86: Replace arch-specific boot_domain with the common one
  xen/dt: Move bootfdt functions to xen/bootfdt.h
  xen/dt: Move bootinfo functions to a new bootinfo.h
  xen/dt: Rename bootfdt.c -> bootinfo-fdt.c
  xen/dt: Extract bootinfo-independent functions to bootfdt.c
  xen/dt: Extract helper to map nodes to module kinds
  xen: Split HAS_DEVICE_TREE in two
  xen/dt: ifdef out DEV_DT-related bits from device_tree.{c,h}
  xen/dt: Allow CONFIG_DEVICE_TREE_PARSE to include device-tree/

 xen/Kconfig.debug                       |   2 +-
 xen/arch/arm/Kconfig                    |   2 +-
 xen/arch/arm/dom0less-build.c           |   8 +-
 xen/arch/arm/domain_build.c             |  21 +-
 xen/arch/arm/include/asm/setup.h        |   2 +-
 xen/arch/arm/kernel.c                   |   8 +-
 xen/arch/arm/setup.c                    |   1 +
 xen/arch/ppc/Kconfig                    |   2 +-
 xen/arch/riscv/Kconfig                  |   2 +-
 xen/arch/riscv/cpufeature.c             |   1 +
 xen/arch/riscv/mm.c                     |   2 +-
 xen/arch/riscv/setup.c                  |   2 +-
 xen/arch/riscv/smpboot.c                |   1 +
 xen/arch/x86/cpu/microcode/core.c       |   7 +-
 xen/arch/x86/hvm/dom0_build.c           |   8 +-
 xen/arch/x86/include/asm/boot-domain.h  |  33 --
 xen/arch/x86/include/asm/bootfdt.h      |  50 ++
 xen/arch/x86/include/asm/bootinfo.h     |  57 +--
 xen/arch/x86/pv/dom0_build.c            |   6 +-
 xen/arch/x86/setup.c                    |  45 +-
 xen/common/Kconfig                      |  15 +-
 xen/common/Makefile                     |   4 +-
 xen/common/device-tree/Makefile         |   5 +-
 xen/common/device-tree/bootfdt.c        | 617 +-----------------------
 xen/common/device-tree/bootinfo-fdt.c   | 584 ++++++++++++++++++++++
 xen/common/device-tree/bootinfo.c       |   2 +-
 xen/common/device-tree/device-tree.c    |   3 +
 xen/common/device-tree/dom0less-build.c |  20 +-
 xen/common/device-tree/domain-build.c   |  22 +-
 xen/common/device-tree/kernel.c         |  22 +-
 xen/common/device-tree/static-evtchn.c  |   1 +
 xen/common/device.c                     |   4 +-
 xen/common/efi/boot.c                   |   2 +-
 xen/common/sched/Kconfig                |   2 +-
 xen/common/sched/boot-cpupool.c         |   1 +
 xen/drivers/char/ns16550.c              |   6 +-
 xen/drivers/passthrough/Makefile        |   2 +-
 xen/drivers/passthrough/iommu.c         |   2 +-
 xen/include/asm-generic/device.h        |  10 +-
 xen/include/xen/bootfdt.h               | 316 +++++-------
 xen/include/xen/bootinfo.h              | 213 ++++++++
 xen/include/xen/device_tree.h           |  82 +---
 xen/include/xen/fdt-domain-build.h      |   2 +-
 xen/include/xen/fdt-kernel.h            |   7 +-
 xen/include/xen/iommu.h                 |   8 +-
 xen/include/xsm/dummy.h                 |   4 +-
 xen/include/xsm/xsm.h                   |  12 +-
 xen/xsm/dummy.c                         |   2 +-
 xen/xsm/flask/hooks.c                   |   6 +-
 xen/xsm/xsm_core.c                      |   4 +-
 xen/xsm/xsm_policy.c                    |   6 +-
 51 files changed, 1146 insertions(+), 1100 deletions(-)
 delete mode 100644 xen/arch/x86/include/asm/boot-domain.h
 create mode 100644 xen/arch/x86/include/asm/bootfdt.h
 create mode 100644 xen/common/device-tree/bootinfo-fdt.c
 create mode 100644 xen/include/xen/bootinfo.h


base-commit: 63919fc4d1cab1771d7b397a2ede8f8769403fe7
-- 
2.43.0