Hi,

This second version is considerably different than the first one.
All changes were made based on review comments from David and Richard,
along with some design changes I decided to make along the way.

Patches were rebased using current David's ppc-for-6.2 tree.

Changes from v1:
- all patches:
  * ppc64-linux-user build tested

- patches 1-3:
  * do not expose 'env->spr' to make MMCR0 access control
  * PMCC was added in hflags to make MMCR0 access control
  * do not use generalist functions with reg switches

- patches 4-8:
  * helper file was renamed to 'power8_pmu.c'
  * no longer use icount to count instructions and cycles
  * cycle counting is now made using time intervals
  * instruction counting now uses a helper inside translate.c that
  counts instructions during translation block end
  * PM_RUN_INST_CMPL (insns completed with run latch) is now implemented
  accordingly
  * PM_CMPLU_STALL events were dropped 

- patches 9-11:
  * rfebb was implemented from scratch using decode tree

- patches 12-16:
  * cycle overflow now uses 5 independent timers, one for each cycle
  capable counter
  * instruction overflow is now triggered via the translation.c helper
  * new patch (16): add capability to enable/disable cycle counter
  overflow when the PMU is running 

- documentation patch was dropped for now. I will re-send it when
this work is more ironed out.

v1 link: https://lists.gnu.org/archive/html/qemu-devel/2021-08/msg01477.html


Daniel Henrique Barboza (13):
  target/ppc: add user write access control for PMU SPRs
  target/ppc: PMU basic cycle count for pseries TCG
  target/ppc/power8_pmu.c: enable PMC1-PMC4 events
  target/ppc: PMU: add instruction counting
  target/ppc/power8_pmu.c: add PM_RUN_INST_CMPL (0xFA) event
  target/ppc/power8_pmu.c: add PMC14/PMC56 counter freeze bits
  PPC64/TCG: Implement 'rfebb' instruction
  target/ppc/excp_helper.c: EBB handling adjustments
  target/ppc/power8_pmu.c: enable PMC1 counter negative overflow
  target/ppc/power8_pmu.c: cycles overflow with all PMCs
  target/ppc: PMU: insns counter negative overflow support
  target/ppc/translate: PMU: handle setting of PMCs while running
  target/ppc/power8_pmu.c: handle overflow bits when PMU is running

Gustavo Romero (3):
  target/ppc: add user read functions for MMCR0 and MMCR2
  target/ppc: add exclusive user write function for MMCR0
  target/ppc: PMU Event-Based exception support

 hw/ppc/spapr_cpu_core.c                |   6 +
 target/ppc/cpu.h                       |  55 ++-
 target/ppc/cpu_init.c                  |  36 +-
 target/ppc/excp_helper.c               |  85 +++++
 target/ppc/helper.h                    |   4 +
 target/ppc/helper_regs.c               |   3 +
 target/ppc/insn32.decode               |   5 +
 target/ppc/meson.build                 |   1 +
 target/ppc/power8_pmu.c                | 467 +++++++++++++++++++++++++
 target/ppc/power8_pmu.h                |  25 ++
 target/ppc/spr_tcg.h                   |   7 +
 target/ppc/translate.c                 | 218 ++++++++++++
 target/ppc/translate/branch-impl.c.inc |  32 ++
 13 files changed, 925 insertions(+), 19 deletions(-)
 create mode 100644 target/ppc/power8_pmu.c
 create mode 100644 target/ppc/power8_pmu.h
 create mode 100644 target/ppc/translate/branch-impl.c.inc

-- 
2.31.1