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@epam.com)

---
Commit "xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"" and commit "
xen/sysctl: wrap around sysctl hypercall" shall be commited together.
---
v6 -> v7:
- Only do rebasing
---
Penny Zheng (10):
  xen/xsm: wrap around xsm_sysctl with CONFIG_SYSCTL
  xen/sysctl: wrap around XEN_SYSCTL_readconsole
  xen/sysctl: wrap around XEN_SYSCTL_sched_id
  xen/pmstat: introduce CONFIG_PM_OP
  xen/sysctl: introduce CONFIG_PM_STATS
  xen/sysctl: wrap around XEN_SYSCTL_page_offline_op
  xen/sysctl: wrap around XEN_SYSCTL_cpupool_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/acpi/cpu_idle.c                 |   2 +
 xen/arch/x86/acpi/cpufreq/hwp.c              |   6 +
 xen/arch/x86/acpi/cpufreq/powernow.c         |   4 +
 xen/arch/x86/configs/pvshim_defconfig        |   3 +
 xen/arch/x86/hvm/Kconfig                     |   1 -
 xen/arch/x86/psr.c                           |  18 +
 xen/arch/x86/sysctl.c                        |   2 -
 xen/common/Kconfig                           |  22 +-
 xen/common/Makefile                          |   2 +-
 xen/common/page_alloc.c                      |   2 +
 xen/common/sched/arinc653.c                  |   6 +
 xen/common/sched/core.c                      |   4 +
 xen/common/sched/cpupool.c                   |   8 +
 xen/common/sched/credit.c                    |   4 +
 xen/common/sched/credit2.c                   |   4 +
 xen/common/sched/private.h                   |   4 +
 xen/common/sysctl.c                          |   4 +-
 xen/drivers/acpi/Makefile                    |   3 +-
 xen/drivers/acpi/pm-op.c                     | 395 +++++++++++++++++++
 xen/drivers/acpi/pmstat.c                    | 355 -----------------
 xen/drivers/char/console.c                   |   2 +
 xen/drivers/cpufreq/cpufreq_misc_governors.c |   2 +
 xen/drivers/cpufreq/cpufreq_ondemand.c       |   2 +
 xen/drivers/cpufreq/utility.c                |  41 --
 xen/drivers/video/Kconfig                    |   2 +-
 xen/include/acpi/cpufreq/cpufreq.h           |   3 -
 xen/include/acpi/cpufreq/processor_perf.h    |  10 +
 xen/include/hypercall-defs.c                 |   8 +-
 xen/include/xsm/xsm.h                        |  18 +
 xen/xsm/dummy.c                              |   6 +
 xen/xsm/flask/hooks.c                        |  14 +
 37 files changed, 552 insertions(+), 418 deletions(-)
 create mode 100644 xen/drivers/acpi/pm-op.c

-- 
2.34.1