[PATCH v10 00/73] per-CPU locks

[Robert Foley]

Changes for v10:
- Fixed one case in cpu_throttle_thread, where we were using 
  qemu_global_mutex instead of cpu->lock for the halt_cond.
- Changed qemu_cpu_kick() to ensure we are under the CPU
  lock so we do not miss a notification.
- Added a few more reviewed-bys.

v9: https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg06289.html

Quoting an earlier patch in the series:
"For context, the goal of this series is to substitute the BQL for the
per-CPU locks in many places, notably the execution loop in cpus.c.
This leads to better scalability for MTTCG, since CPUs don't have
to acquire a contended global lock (the BQL) every time they
stop executing code.
See the last commit for some performance numbers."

Emilio G. Cota (68):
  cpu: rename cpu->work_mutex to cpu->lock
  cpu: introduce cpu_mutex_lock/unlock
  cpu: make qemu_work_cond per-cpu
  cpu: move run_on_cpu to cpus-common
  cpu: introduce process_queued_cpu_work_locked
  cpu: make per-CPU locks an alias of the BQL in TCG rr mode
  tcg-runtime: define helper_cpu_halted_set
  ppc: convert to helper_cpu_halted_set
  cris: convert to helper_cpu_halted_set
  hppa: convert to helper_cpu_halted_set
  m68k: convert to helper_cpu_halted_set
  alpha: convert to helper_cpu_halted_set
  microblaze: convert to helper_cpu_halted_set
  cpu: define cpu_halted helpers
  tcg-runtime: convert to cpu_halted_set
  arm: convert to cpu_halted
  ppc: convert to cpu_halted
  sh4: convert to cpu_halted
  i386: convert to cpu_halted
  lm32: convert to cpu_halted
  m68k: convert to cpu_halted
  mips: convert to cpu_halted
  riscv: convert to cpu_halted
  s390x: convert to cpu_halted
  sparc: convert to cpu_halted
  xtensa: convert to cpu_halted
  gdbstub: convert to cpu_halted
  openrisc: convert to cpu_halted
  cpu-exec: convert to cpu_halted
  cpu: convert to cpu_halted
  cpu: define cpu_interrupt_request helpers
  exec: use cpu_reset_interrupt
  arm: convert to cpu_interrupt_request
  i386: convert to cpu_interrupt_request
  i386/kvm: convert to cpu_interrupt_request
  i386/hax-all: convert to cpu_interrupt_request
  i386/whpx-all: convert to cpu_interrupt_request
  i386/hvf: convert to cpu_request_interrupt
  ppc: convert to cpu_interrupt_request
  sh4: convert to cpu_interrupt_request
  cris: convert to cpu_interrupt_request
  hppa: convert to cpu_interrupt_request
  lm32: convert to cpu_interrupt_request
  m68k: convert to cpu_interrupt_request
  mips: convert to cpu_interrupt_request
  nios: convert to cpu_interrupt_request
  s390x: convert to cpu_interrupt_request
  alpha: convert to cpu_interrupt_request
  moxie: convert to cpu_interrupt_request
  sparc: convert to cpu_interrupt_request
  openrisc: convert to cpu_interrupt_request
  unicore32: convert to cpu_interrupt_request
  microblaze: convert to cpu_interrupt_request
  accel/tcg: convert to cpu_interrupt_request
  cpu: convert to interrupt_request
  cpu: call .cpu_has_work with the CPU lock held
  cpu: introduce cpu_has_work_with_iothread_lock
  ppc: convert to cpu_has_work_with_iothread_lock
  mips: convert to cpu_has_work_with_iothread_lock
  s390x: convert to cpu_has_work_with_iothread_lock
  riscv: convert to cpu_has_work_with_iothread_lock
  sparc: convert to cpu_has_work_with_iothread_lock
  xtensa: convert to cpu_has_work_with_iothread_lock
  cpu: rename all_cpu_threads_idle to qemu_tcg_rr_all_cpu_threads_idle
  cpu: protect CPU state with cpu->lock instead of the BQL
  cpus-common: release BQL earlier in run_on_cpu
  cpu: add async_run_on_cpu_no_bql
  cputlb: queue async flush jobs without the BQL

Paolo Bonzini (4):
  ppc: use cpu_reset_interrupt
  i386: use cpu_reset_interrupt
  s390x: use cpu_reset_interrupt
  openrisc: use cpu_reset_interrupt

Robert Foley (1):
  hw/semihosting: convert to cpu_halted_set

 accel/tcg/cpu-exec.c            |  40 ++-
 accel/tcg/cputlb.c              |  10 +-
 accel/tcg/tcg-all.c             |  12 +-
 accel/tcg/tcg-runtime.c         |   7 +
 accel/tcg/tcg-runtime.h         |   2 +
 accel/tcg/translate-all.c       |   2 +-
 cpus-common.c                   | 108 ++++++--
 cpus.c                          | 456 ++++++++++++++++++++++++++------
 exec.c                          |   2 +-
 gdbstub.c                       |   4 +-
 hw/arm/omap1.c                  |   4 +-
 hw/arm/pxa2xx_gpio.c            |   2 +-
 hw/arm/pxa2xx_pic.c             |   2 +-
 hw/core/cpu.c                   |  28 +-
 hw/core/machine-qmp-cmds.c      |   2 +-
 hw/core/machine.c               |   1 +
 hw/intc/s390_flic.c             |   4 +-
 hw/mips/cps.c                   |   2 +-
 hw/misc/mips_itu.c              |   4 +-
 hw/openrisc/cputimer.c          |   2 +-
 hw/ppc/e500.c                   |   4 +-
 hw/ppc/ppc.c                    |  12 +-
 hw/ppc/ppce500_spin.c           |   6 +-
 hw/ppc/spapr_cpu_core.c         |   4 +-
 hw/ppc/spapr_hcall.c            |  14 +-
 hw/ppc/spapr_rtas.c             |   8 +-
 hw/semihosting/console.c        |   4 +-
 hw/sparc/leon3.c                |   2 +-
 hw/sparc/sun4m.c                |   8 +-
 hw/sparc64/sparc64.c            |   8 +-
 include/hw/core/cpu.h           | 196 ++++++++++++--
 stubs/Makefile.objs             |   1 +
 stubs/cpu-lock.c                |  27 ++
 target/alpha/cpu.c              |   8 +-
 target/alpha/translate.c        |   6 +-
 target/arm/arm-powerctl.c       |   6 +-
 target/arm/cpu.c                |   8 +-
 target/arm/helper.c             |  16 +-
 target/arm/machine.c            |   2 +-
 target/arm/op_helper.c          |   2 +-
 target/cris/cpu.c               |   2 +-
 target/cris/helper.c            |   4 +-
 target/cris/translate.c         |   5 +-
 target/hppa/cpu.c               |   2 +-
 target/hppa/translate.c         |   3 +-
 target/i386/cpu.c               |   4 +-
 target/i386/cpu.h               |   2 +-
 target/i386/hax-all.c           |  42 +--
 target/i386/helper.c            |   8 +-
 target/i386/hvf/hvf.c           |  12 +-
 target/i386/hvf/x86hvf.c        |  37 +--
 target/i386/kvm.c               |  82 +++---
 target/i386/misc_helper.c       |   2 +-
 target/i386/seg_helper.c        |  13 +-
 target/i386/svm_helper.c        |   6 +-
 target/i386/whpx-all.c          |  57 ++--
 target/lm32/cpu.c               |   2 +-
 target/lm32/op_helper.c         |   4 +-
 target/m68k/cpu.c               |   2 +-
 target/m68k/op_helper.c         |   2 +-
 target/m68k/translate.c         |   9 +-
 target/microblaze/cpu.c         |   2 +-
 target/microblaze/translate.c   |   4 +-
 target/mips/cp0_helper.c        |   6 +-
 target/mips/cpu.c               |  11 +-
 target/mips/kvm.c               |   4 +-
 target/mips/op_helper.c         |   2 +-
 target/mips/translate.c         |   4 +-
 target/moxie/cpu.c              |   2 +-
 target/nios2/cpu.c              |   2 +-
 target/openrisc/cpu.c           |   4 +-
 target/openrisc/sys_helper.c    |   4 +-
 target/ppc/excp_helper.c        |   6 +-
 target/ppc/helper_regs.h        |   2 +-
 target/ppc/kvm.c                |   6 +-
 target/ppc/translate.c          |   6 +-
 target/ppc/translate_init.inc.c |  41 +--
 target/riscv/cpu.c              |   5 +-
 target/riscv/op_helper.c        |   2 +-
 target/s390x/cpu.c              |  28 +-
 target/s390x/excp_helper.c      |   4 +-
 target/s390x/kvm.c              |   2 +-
 target/s390x/sigp.c             |   8 +-
 target/sh4/cpu.c                |   2 +-
 target/sh4/helper.c             |   2 +-
 target/sh4/op_helper.c          |   2 +-
 target/sparc/cpu.c              |   6 +-
 target/sparc/helper.c           |   2 +-
 target/unicore32/cpu.c          |   2 +-
 target/unicore32/softmmu.c      |   2 +-
 target/xtensa/cpu.c             |   6 +-
 target/xtensa/exc_helper.c      |   2 +-
 target/xtensa/helper.c          |   2 +-
 93 files changed, 1063 insertions(+), 456 deletions(-)
 create mode 100644 stubs/cpu-lock.c

-- 
2.17.1