[v5,0/7] ARM split hardware and control domains

Message

Jason Andryuk April 16, 2025, 9:29 p.m. UTC

This series implements separation of dom0 into separate hardware and
control domains.  It uses the capabilities idea from Hyperlaunch -
hardware, control, and xenstore.  It's been tested with dom1 as
control, dom2 as a domU, and dom3 as hardware and xenstore.

To keep things more managable, this is only the ARM hypervisor changes,
and one associated init-dom0less change.  The series is slightly
re-ordered to move xenstore changes ahead of adding the capabilities.

Setting hardware domain as domid 0 is removed.

v5 is fully reviewed.

I've been unable to run a combined control/xenstore.  Linux console
output stops shortly after the domain determines it should be XS_LOCAL.
I have not investigated further.  An ARM xenstore domain also has
console output stop at seemingly the same place.

Daniel P. Smith (1):
  xen: introduce hardware domain create flag

Jason Andryuk (6):
  xen/arm: dom0less hwdom construction
  xen/arm: dom0less delay xenstore initialization
  xen/arm: dom0less seed xenstore grant table entry
  tools/init-dom0less: Only seed legacy xenstore grants
  xen/arm: dom0less use has_dtb local variable
  xen/arm: Add capabilities to dom0less

 docs/misc/arm/device-tree/booting.txt     |  11 ++
 tools/helpers/init-dom0less.c             |  10 +-
 xen/arch/arm/dom0less-build.c             | 197 ++++++++++++++++------
 xen/arch/arm/domain.c                     |   3 +-
 xen/arch/arm/domain_build.c               |  11 +-
 xen/arch/arm/include/asm/dom0less-build.h |   2 +
 xen/arch/arm/include/asm/domain_build.h   |   3 +-
 xen/arch/x86/setup.c                      |   3 +-
 xen/common/domain.c                       |  19 ++-
 xen/common/grant_table.c                  |  14 ++
 xen/include/public/bootfdt.h              |  31 ++++
 xen/include/xen/domain.h                  |   2 +
 xen/include/xen/grant_table.h             |   4 +
 xen/include/xen/types.h                   |   1 +
 14 files changed, 247 insertions(+), 64 deletions(-)
 create mode 100644 xen/include/public/bootfdt.h