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[v1,00/19] xen: introduce CONFIG_SYSCTL

Message ID 20250312040632.2853485-1-Penny.Zheng@amd.com (mailing list archive)
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Series xen: introduce CONFIG_SYSCTL | expand

Message

Penny Zheng March 12, 2025, 4:06 a.m. UTC 
It can be beneficial for some dom0less systems to further reduce Xen footprint
and disable 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, are also
being wrapped with proper CONFIG_SYSCTL, to reduce Xen footprint as much as
possible.

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

Penny Zheng (17):
  xen/xsm: wrap around xsm_sysctl with CONFIG_SYSCTL
  xen/sysctl: wrap around XEN_SYSCTL_readconsole
  xen/sysctl: make CONFIG_TRACEBUFFER depend on CONFIG_SYSCTL
  xen/sysctl: wrap around XEN_SYSCTL_sched_id
  xen/sysctl: wrap around XEN_SYSCTL_perfc_op
  xen/sysctl: wrap around XEN_SYSCTL_lockprof_op
  xen/sysctl: introduce CONFIG_PM_STATISTIC
  xen/sysctl: make CONFIG_PM_STATISTIC depend on CONFIG_SYSCTL
  xen/page: fix return type of online_page()
  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: make avail_domheap_pages() static
  xen/sysctl: wrap around XEN_SYSCTL_physinfo
  xen/sysctl: wrap around XEN_SYSCTL_coverage_op
  xen/sysctl: wrap around XEN_SYSCTL_livepatch_op
  xen/sysctl: wrap around arch-specific arch_do_sysctl

Stefano Stabellini (2):
  xen: introduce CONFIG_SYSCTL
  xen/sysctl: wrap around sysctl hypercall

 xen/Kconfig.debug                            |   2 +-
 xen/arch/arm/Kconfig                         |   2 +-
 xen/arch/arm/Makefile                        |   2 +-
 xen/arch/riscv/stubs.c                       |   2 +
 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/include/asm/psr.h               |   2 +
 xen/arch/x86/psr.c                           |  18 ++
 xen/common/Kconfig                           |  17 +-
 xen/common/Makefile                          |   2 +-
 xen/common/page_alloc.c                      |  11 +-
 xen/common/perfc.c                           |   2 +
 xen/common/sched/arinc653.c                  |   6 +
 xen/common/sched/core.c                      |   4 +
 xen/common/sched/cpupool.c                   |   9 +
 xen/common/sched/credit.c                    |   4 +
 xen/common/sched/credit2.c                   |   4 +
 xen/common/sched/private.h                   |   4 +
 xen/common/spinlock.c                        |   2 +
 xen/common/sysctl.c                          |   4 +-
 xen/drivers/acpi/Makefile                    |   2 +-
 xen/drivers/acpi/pmstat.c                    | 192 ++++++++++++++++---
 xen/drivers/char/console.c                   |   2 +
 xen/drivers/cpufreq/cpufreq.c                |  31 +++
 xen/drivers/cpufreq/cpufreq_misc_governors.c |   2 +
 xen/drivers/cpufreq/cpufreq_ondemand.c       |   2 +
 xen/drivers/cpufreq/utility.c                | 164 +---------------
 xen/include/acpi/cpufreq/cpufreq.h           |   6 +
 xen/include/acpi/cpufreq/processor_perf.h    |  12 +-
 xen/include/hypercall-defs.c                 |   4 +
 xen/include/xen/acpi.h                       |   2 +
 xen/include/xen/console.h                    |   8 +
 xen/include/xen/hypercall.h                  |   8 +
 xen/include/xen/mm.h                         |  19 +-
 xen/include/xen/perfc.h                      |   8 +
 xen/include/xen/pmstat.h                     |   2 +
 xen/include/xen/sched.h                      |  22 +++
 xen/include/xen/spinlock.h                   |   7 +
 xen/include/xsm/dummy.h                      |  21 ++
 xen/include/xsm/xsm.h                        |  27 +++
 xen/xsm/dummy.c                              |   6 +
 xen/xsm/flask/hooks.c                        |  14 ++
 44 files changed, 464 insertions(+), 208 deletions(-)