[Qemu-devel] [PATCH v2 00/11] target-arm: handle mmu_idx/translation regimes properly

[Peter Maydell]

This patchseries fixes up our somewhat broken handling of mmu_idx values:
 * implement the full set of 7 mmu_idxes we need for supporting EL2 and EL3
 * pass the mmu_idx in the TB flags rather than EL or a priv flag,
   so we can generate code with the correct kind of access
 * identify the correct mmu_idx to use for AT/ATS system insns
 * pass mmu_idx into get_phys_addr() and use it within that family
   of functions as an indication of which translation regime to do
   a v-to-p lookup for, instead of relying on an is_user flag plus the
   current CPU state
 * some minor indent stuff on the end

It does not contain:
 * complete support for EL2 or 64-bit EL3; in some places I have added
   the code where it was obvious and easy; in others I have just left
   TODO marker comments
 * the 'tlb_flush_for_mmuidx' functionality I proposed in a previous mail;
   I preferred to get the semantics right in this patchset first before
   improving the efficiency later

Changes v1->v2:
 * use the correct FCSEIDR for the translation regime
 * fix typo in patch 1 for MEMSUFFIX to use for new index 6
 * a few new comments and other minor nits as per review of v1

Peter Maydell (11):
  cpu_ldst.h: Allow NB_MMU_MODES to be 7
  target-arm: Make arm_current_el() return sensible values for M profile
  target-arm/translate-a64: Fix wrong mmu_idx usage for LDT/STT
  target-arm: Define correct mmu_idx values and pass them in TB flags
  target-arm: Use correct mmu_idx for unprivileged loads and stores
  target-arm: Don't define any MMU_MODE*_SUFFIXes
  target-arm: Split AArch64 cases out of ats_write()
  target-arm: Pass mmu_idx to get_phys_addr()
  target-arm: Use mmu_idx in get_phys_addr()
  target-arm: Reindent ancient page-table-walk code
  target-arm: Fix brace style in reindented code

 include/exec/cpu_ldst.h    |  28 ++-
 target-arm/cpu.h           | 121 +++++++---
 target-arm/helper.c        | 548 +++++++++++++++++++++++++++++++--------------
 target-arm/translate-a64.c |  24 +-
 target-arm/translate.c     |  31 ++-
 target-arm/translate.h     |   3 +-
 6 files changed, 557 insertions(+), 198 deletions(-)

-- 
1.9.1