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[00/15] target/arm: More v8.1M features

Message ID 20201116160831.31000-1-peter.maydell@linaro.org (mailing list archive)
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Series target/arm: More v8.1M features | expand

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Peter Maydell Nov. 16, 2020, 4:08 p.m. UTC 
This patchset implements a somewhat miscellaneous collection of
new-in-v8.1M features, as well as some bugfixes. It's for-6.0
material.

In the bugfix category:
 * RAZWI (or BusFault for unprivileged accesses) the whole of the
   system PPB address range, not just the SCS
 * Don't clobber ID_PFR1.Security on M-profile
 * Don't allow VMRS/VMSR to fp sysregs that don't exist on M-profile

In the features category:
 * v8.1M PXN extension
 * VSCCLRM and CLRM insns
 * VLDR/VSTR (sysreg) insns
 * new M-profile fp sysregs: FPSCR_nzcvqc, FPCXT_S, FPCXT_NS
 * update FPDSCR masking to allow new-in-v8.1M bits in that register

As usual, none of this will be enabled until we eventually get
to the point of a complete v8.1M implementation and can define
a Cortex-M55 CPU model.

thanks
-- PMM

Peter Maydell (15):
  hw/intc/armv7m_nvic: Make all of system PPB range be RAZWI/BusFault
  target/arm: Implement v8.1M PXN extension
  target/arm: Don't clobber ID_PFR1.Security on M-profile cores
  target/arm: Implement VSCCLRM insn
  target/arm: Implement CLRM instruction
  target/arm: Enforce M-profile VMRS/VMSR register restrictions
  target/arm: Refactor M-profile VMSR/VMRS handling
  target/arm: Move general-use constant expanders up in translate.c
  target/arm: Implement VLDR/VSTR system register
  target/arm: Implement M-profile FPSCR_nzcvqc
  target/arm: Use new FPCR_NZCV_MASK constant
  target/arm: Factor out preserve-fp-state from full_vfp_access_check()
  target/arm: Implement FPCXT_S fp system register
  target/arm: Implement FPCXT_NS fp system register
  hw/intc/armv7m_nvic: Update FPDSCR masking for v8.1M

 include/hw/intc/armv7m_nvic.h  |   1 +
 target/arm/cpu.h               |  30 ++
 target/arm/m-nocp.decode       |   8 +-
 target/arm/t32.decode          |   6 +-
 target/arm/vfp.decode          |  14 +
 hw/arm/armv7m.c                |   2 +-
 hw/intc/armv7m_nvic.c          |  87 ++++-
 target/arm/cpu.c               |   5 +-
 target/arm/helper.c            |   7 +-
 target/arm/translate.c         | 102 ++++--
 target/arm/translate-vfp.c.inc | 581 +++++++++++++++++++++++++++++++--
 11 files changed, 765 insertions(+), 78 deletions(-)