[PATCH v8 0/7] xen: introduce CONFIG_SYSCTL

[Penny Zheng <Penny.Zheng@xxxxxxx>]

It can be beneficial for some dom0less systems to further reduce Xen footprint
via disabling some hypercalls handling code, which may not to be used &
required in such systems. Each hypercall has a separate option to keep
configuration flexible.

Options to disable hypercalls:
- sysctl
- domctl
- hvm
- physdev
- platform

This patch serie is only focusing on introducing CONFIG_SYSCTL. Different
options will be covered in different patch serie.

Features, like LIVEPATCH, Overlay DTB, which fully rely on sysctl op, will
be wrapped with CONFIG_SYSCTL, to reduce Xen footprint as much as possible.

It is derived from Stefano Stabellini's commit "xen: introduce kconfig options 
to
disable hypercalls"(
https://lore.kernel.org/xen-devel/20241219092917.3006174-1-Sergiy_Kibrik@xxxxxxxx)

---
Commit "xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"" and commit "
xen/sysctl: wrap around sysctl hypercall" shall be commited together.
---
Penny Zheng (6):
  xen/xsm: wrap around xsm_sysctl with CONFIG_SYSCTL
  xen/sysctl: wrap around XEN_SYSCTL_readconsole
  xen/sysctl: wrap around XEN_SYSCTL_page_offline_op
  xen/sysctl: wrap around XEN_SYSCTL_scheduler_op
  xen/sysctl: wrap around arch-specific arch_do_sysctl
  xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"

Stefano Stabellini (1):
  xen/sysctl: wrap around sysctl hypercall

 xen/arch/arm/Kconfig                  |  1 +
 xen/arch/arm/Makefile                 |  2 +-
 xen/arch/arm/sysctl.c                 |  2 --
 xen/arch/riscv/stubs.c                |  2 +-
 xen/arch/x86/Kconfig                  |  4 ----
 xen/arch/x86/Makefile                 |  2 +-
 xen/arch/x86/configs/pvshim_defconfig |  5 +----
 xen/arch/x86/hvm/Kconfig              |  1 -
 xen/arch/x86/psr.c                    | 18 ++++++++++++++++++
 xen/arch/x86/sysctl.c                 |  2 --
 xen/common/Kconfig                    |  6 +++++-
 xen/common/Makefile                   |  2 +-
 xen/common/page_alloc.c               |  2 ++
 xen/common/sched/arinc653.c           |  6 ++++++
 xen/common/sched/core.c               |  2 ++
 xen/common/sched/credit.c             |  4 ++++
 xen/common/sched/credit2.c            |  4 ++++
 xen/common/sched/private.h            |  4 ++++
 xen/drivers/char/console.c            |  2 ++
 xen/drivers/video/Kconfig             |  2 +-
 xen/include/hypercall-defs.c          |  8 ++++++--
 xen/include/xsm/xsm.h                 | 18 ++++++++++++++++++
 xen/xsm/dummy.c                       |  6 ++++++
 xen/xsm/flask/hooks.c                 | 14 ++++++++++++++
 24 files changed, 98 insertions(+), 21 deletions(-)

-- 
2.34.1