[PATCH v11 0/7] RISC-V Pointer Masking implementation

[Alexey Baturo]

v10:
Hi folks,

For this iteration I fixes some minor things Alistair mentioned in review and 
splitted one of patches into two:
one with preliminary CSR numbers(unfortunately there're still no final ones) 
and another with actual CSR implementation.

As for not raising the exception on writing into PM CSRs in wrong mode, it's 
expected behavior and reflected in the spec, but I agree that it's odd.

Thanks

v9:
Hi folks,

Finaly the J-ext spec has table with preliminary CSR numbers.
Rebased and updated CSR machinery for recent changes.
Addressed Alistair's comments.

v8-resend:
Resending to trigger recheck due to minor codestyle issues.

v8:
Hi folks,

Finally we were able to assign v0.1 draft for Pointer Masking extension for 
RISC-V: 
https://github.com/riscv/riscv-j-extension/blob/master/pointer-masking-proposal.adoc
This is supposed to be the first series of patches with initial support for PM. 
It obviously misses support for hypervisor mode, vector load/stores and some 
other features, while using temporary csr numbers(they're to be assigned by the 
committee a bit later).
With this patch series we were able to run a bunch of tests with HWASAN checks 
enabled.

I hope I've managed to addressed @Alistair's previous comments in this version.

Thanks!

v7:
Hi folks,

Sorry it took me almost 3 month to provide the reply and fixes: it was a really 
busy EOY.
This series contains fixed @Alistair suggestion on enabling J-ext.

As for @Richard comments:
- Indeed I've missed appending review-by to the approved commits. Now I've 
restored them except for the fourth commit. @Richard could you please tell if 
you think it's still ok to commit it as is, or should I support masking mem ops 
for RVV first?
- These patches don't have any support for load/store masking for RVV and RVH 
extensions, so no support for special load/store for Hypervisor in particular.

If this patch series would be accepted, I think my further attention would be 
to:
- Support pm for memory operations for RVV
- Add proper csr and support pm for memory operations for Hypervisor mode
- Support address wrapping on unaligned accesses as @Richard mentioned 
previously

Thanks!

Alexey Baturo (6):
  [RISCV_PM] Add J-extension into RISC-V
  [RISCV_PM] Add CSR defines for RISC-V PM extension
  [RISCV_PM] Support CSRs required for RISC-V PM extension except for
    the h-mode
  [RISCV_PM] Print new PM CSRs in QEMU logs
  [RISCV_PM] Support pointer masking for RISC-V for i/c/f/d/a types of
    instructions
  [RISCV_PM] Allow experimental J-ext to be turned on

Anatoly Parshintsev (1):
  [RISCV_PM] Implement address masking functions required for RISC-V
    Pointer Masking extension

 target/riscv/cpu.c                      |  31 +++
 target/riscv/cpu.h                      |  33 +++
 target/riscv/cpu_bits.h                 |  96 ++++++++
 target/riscv/csr.c                      | 287 ++++++++++++++++++++++++
 target/riscv/insn_trans/trans_rva.c.inc |   3 +
 target/riscv/insn_trans/trans_rvd.c.inc |   2 +
 target/riscv/insn_trans/trans_rvf.c.inc |   2 +
 target/riscv/insn_trans/trans_rvi.c.inc |   2 +
 target/riscv/translate.c                |  42 ++++
 9 files changed, 498 insertions(+)

-- 
2.30.2