[Qemu-devel] [PATCH v2 00/23] target-arm: add Security Extensions for CPUs

[Fabian Aggeler <aggelerf@ethz.ch>]

Hi,

This is a rework of the Samsung patches sent last year to add Security 
Extensions. The patches have been changed based on the discussion on
the mailing list. Other changes became necessary because of Aarch64
support which got added in the meantime. This patchset makes it possible
to run a kernel in the secure world and then switch to non-secure
on CPUs that implement Security Extensions. It works for EL3 in Aarch32
state, but may add _EL3 registers where necessary to reflect the mapping
of secure instances of cp registers to _EL3 registers.

Banking of cp registers has been changed from active mass-swapping to
the mechanism discussed on the mailing list, where every Aarch32 cp 
register goes into the hashtable twice. A ns-bit is added to the key
of the register which is used when accessing a cp register to get the
correct instance.

Magic numbers have been changed to bitshifted constants or macros to make
the code easier to read.

The whole patchset now uses the term Security Extensions instead of 
TrustZone as this is the term which is used in the ARM ARM.

I am happy for any feedback, especially for the banking of course. It should
not be too hard to combine these changes with the recent effort towards EL3
in A64. 

Thanks,
Fabian

Fabian Aggeler (12):
  target-arm: add arm_is_secure() function
  target-arm: add NSACR support
  target-arm: Split TLB for secure state and EL3 in Aarch64
  target-arm: add banked coprocessor register type and macros
  target-arm: Restrict EL3 to Aarch32 state
  target-arm: Use arm_current_sctlr to access SCTLR
  target-arm: Use raw_write/raw_read whenever possible
  target-arm: Convert banked coprocessor registers
  target-arm: maintain common bits of banked CP registers
  target-arm: add MVBAR support
  target-arm: implement IRQ/FIQ routing to Monitor mode
  target-arm: Respect SCR.FW, SCR.AW and SCTLR.NMFI

Sergey Fedorov (8):
  target-arm: move SCR into Security Extensions register list
  target-arm: adjust TTBCR for Security Extension feature
  target-arm: reject switching to monitor mode from non-secure state
  target-arm: adjust arm_current_pl() for Security Extensions
  target-arm: add non-secure Translation Block flag
  target-arm: implement CPACR register logic
  target-arm: add SDER definition
  target-arm: implement SMC instruction

Svetlana Fedoseeva (3):
  target-arm: add new CPU feature for Security Extensions
  target-arm: preserve RAO/WI bits of ARMv7 SCTLR
  target-arm: add CPU Monitor mode

 hw/arm/pxa2xx.c            |   2 +-
 linux-user/main.c          |   2 +-
 target-arm/cpu-qom.h       |   1 +
 target-arm/cpu.c           |   8 +-
 target-arm/cpu.h           | 271 ++++++++++++++++++++++---
 target-arm/helper-a64.c    |   3 +-
 target-arm/helper.c        | 489 ++++++++++++++++++++++++++++++++++++---------
 target-arm/machine.c       |   6 +-
 target-arm/op_helper.c     |   2 +-
 target-arm/translate-a64.c |   9 +-
 target-arm/translate.c     | 342 ++++++++++++++++++-------------
 target-arm/translate.h     |   4 +
 12 files changed, 866 insertions(+), 273 deletions(-)

-- 
1.8.3.2