[v3,0/3] Expose PMU to the guests

Message

Michal Orzel Oct. 8, 2021, 8:19 a.m. UTC

This patch series is a rework of an already pushed patch
exposing PMU to the guests. Since the second version the vpmu
parameter is common and prework in the form of reporting
availability of vPMU on the hardware is added.

The third version of the patch series removes the redundant check
from x86 code and modifies the way to define the flags XEN_DOMCTL_CDF and
XEN_SYSCTL_PHYSCAP, meaning not to define bit position and mask separately.

The current status is that the PMU registers are not virtualized
and the physical registers are directly accessible when "vpmu"
parameter is enabled in the guest config file. There is no interrupt
support and Xen will not save/restore the register values on context
switches. This is to be done in the future.

Michal Orzel (3):
  xen+tools: Introduce XEN_SYSCTL_PHYSCAP_vpmu
  xen/arm: Check for PMU platform support
  xen: Expose the PMU to the guests

 docs/man/xl.cfg.5.pod.in             | 17 ++++++++++
 tools/golang/xenlight/helpers.gen.go |  8 +++++
 tools/golang/xenlight/types.gen.go   |  2 ++
 tools/include/libxl.h                | 12 +++++++
 tools/libs/light/libxl.c             |  1 +
 tools/libs/light/libxl_create.c      |  4 +++
 tools/libs/light/libxl_types.idl     |  3 ++
 tools/ocaml/libs/xc/xenctrl.ml       |  2 ++
 tools/ocaml/libs/xc/xenctrl.mli      |  2 ++
 tools/xl/xl_info.c                   |  5 +--
 tools/xl/xl_parse.c                  |  2 ++
 xen/arch/arm/domain.c                | 10 ++++--
 xen/arch/arm/setup.c                 |  1 +
 xen/common/domain.c                  | 11 ++++++-
 xen/common/sysctl.c                  |  3 ++
 xen/include/asm-arm/cpufeature.h     | 49 ++++++++++++++++++++++++++--
 xen/include/asm-arm/domain.h         |  1 +
 xen/include/public/domctl.h          |  4 ++-
 xen/include/public/sysctl.h          |  6 ++--
 xen/include/xen/domain.h             |  2 ++
 20 files changed, 135 insertions(+), 10 deletions(-)