[PATCH v9 00/10] PMU-EBB support for PPC64 TCG

[Daniel Henrique Barboza]

Hi,

In this new version the most significant change is in patch 6,
where a new hflag allows us to not call the instruction helper
inside translate.c unless we're absolutely certain that there
is an instruction count event being sampled and active in the
PMU. This change turned out to be a big boost in performance
in the PMU emulation overall, most notably when dealing with
cycle events that were calling the helper needlessly. 

This and all other changes were suggested by David in his review
of the previous version.


Changes from v8:
- patch 5:
  * overflow timer of PMC5 is now marked as NULL instead of absent
- patch 6:
  * new hflags HFLAGS_INSN_CNT added to track instruction count state
  * previous HFLAGS_MMCR0FC flag removed
  * pmu_count_insns() now works partially with user mode
- patch 9:
  * fixed interrupt comment
- v8 link: https://lists.gnu.org/archive/html/qemu-devel/2021-11/msg05160.html


Daniel Henrique Barboza (9):
  target/ppc: introduce PMUEventType and PMU overflow timers
  target/ppc: PMU basic cycle count for pseries TCG
  target/ppc: PMU: update counters on PMCs r/w
  target/ppc: PMU: update counters on MMCR1 write
  target/ppc: enable PMU counter overflow with cycle events
  target/ppc: enable PMU instruction count
  target/ppc/power8-pmu.c: add PM_RUN_INST_CMPL (0xFA) event
  PPC64/TCG: Implement 'rfebb' instruction
  target/ppc/excp_helper.c: EBB handling adjustments

Gustavo Romero (1):
  target/ppc: PMU Event-Based exception support

 hw/ppc/spapr_cpu_core.c                |   1 +
 target/ppc/cpu.h                       |  60 +++-
 target/ppc/cpu_init.c                  |  46 ++-
 target/ppc/excp_helper.c               |  93 ++++++
 target/ppc/helper.h                    |   6 +
 target/ppc/helper_regs.c               |   7 +
 target/ppc/insn32.decode               |   5 +
 target/ppc/meson.build                 |   1 +
 target/ppc/power8-pmu-regs.c.inc       |  69 ++++-
 target/ppc/power8-pmu.c                | 386 +++++++++++++++++++++++++
 target/ppc/power8-pmu.h                |  26 ++
 target/ppc/spr_tcg.h                   |   5 +
 target/ppc/translate.c                 |  78 +++++
 target/ppc/translate/branch-impl.c.inc |  33 +++
 14 files changed, 801 insertions(+), 15 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