[Qemu-devel] [PATCH v6 0/3] ppc: handle broadcast tlb flush

[Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>]

PowerPC failed to handle broadcast TLB flush operations. Executing 
instructions that are defined architecturally as synchronizing global TLB 
should have a global effect.

* tlbie on BookS
* tlbivax on BookE
* H_CALLs (H_REMOVE, H_BULK_REMOVE and H_PROTECT) in case of pseries, 
  since they contain a tlbie on a real hypervisor.

The implementation provides a single point that can be used in MTTCG for 
doing async-flushes.

The patchset introduces bit-flags in CPUPPCState::tlb_need_flush:

  TLB_NEED_LOCAL_FLUSH (0x1) - Flush local tlb
  TLB_NEED_GLOBAL_FLUSH (0x2) - Flush tlb on other cpus.

Note: Tested patches on commit ebc231d(Merge remote-tracking branch 
'remotes/awilliam/tags/vfio-fixes-20160915.0' into staging), as ppc64 
system emulation is broken after that.

Changelog
v5:
* Added check_tlb_flush_[local, global] helpers
* Changed the variable type to bool

v4: 
* Updated commit message for patch 1/3

v3:
* Updated commit messages and cover letter(benh)


Nikunj A Dadhania (3):
  target-ppc: add TLB_NEED_LOCAL_FLUSH flag
  target-ppc: add flag in chech_tlb_flush()
  target-ppc: tlbie/tlbivax should have global effect

 hw/ppc/spapr_hcall.c     |  6 ++++--
 target-ppc/cpu.h         |  2 ++
 target-ppc/excp_helper.c |  4 ++--
 target-ppc/helper.h      |  3 ++-
 target-ppc/helper_regs.h | 25 +++++++++++++++++++++----
 target-ppc/mmu-hash64.c  |  6 +++---
 target-ppc/mmu_helper.c  | 25 +++++++++++++++++--------
 target-ppc/translate.c   | 29 +++++++++++++++++++----------
 8 files changed, 70 insertions(+), 30 deletions(-)

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2.7.4