[v3,00/20] riscv support for control flow integrity extensions

Message

Deepak Gupta Aug. 7, 2024, 12:06 a.m. UTC

Sending out v3 for riscv zicfilp and zicfiss extensions support in qemu.
I sent out v1 [1] and v2 [2] a while ago.

[1] - https://lists.nongnu.org/archive/html/qemu-devel/2024-07/msg06017.html
[2] - https://lore.kernel.org/all/[e-mail]/T/

---
v3:
   - Removed prctl specific patches because they need to be upstream
     in kernel first.
   - As suggested by Richard, added TB flag if fcfi enabled
   - Re-worked translation for landing pad and shadow stack instructions
     to not require helper.
   - tcg helpers only for cfi violation cases so that trace hooks can be
     placed.
   - Style changes.
   - fixes assert condition in accel/tcg

v2:
   - added missed file (in v1) for shadow stack instructions implementation.

Deepak Gupta (20):
  accel/tcg: restrict assert on icount_enabled to qemu-system
  target/riscv: Add zicfilp extension
  target/riscv: Introduce elp state and enabling controls for zicfilp
  target/riscv: save and restore elp state on priv transitions
  target/riscv: additional code information for sw check
  target/riscv: tracking indirect branches (fcfi) for zicfilp
  target/riscv: zicfilp `lpad` impl and branch tracking
  disas/riscv: enabled `lpad` disassembly
  target/riscv: Add zicfiss extension
  target/riscv: introduce ssp and enabling controls for zicfiss
  target/riscv: tb flag for shadow stack  instructions
  target/riscv: implement zicfiss instructions
  target/riscv: compressed encodings for sspush and sspopchk
  target/riscv: mmu changes for zicfiss shadow stack protection
  target/riscv: shadow stack mmu index for shadow stack instructions
  disas/riscv: enable disassembly for zicfiss instructions
  disas/riscv: enable disassembly for compressed sspush/sspopchk
  target/riscv: add trace-hooks for each case of sw-check exception
  linux-user: permit RISC-V CFI dynamic entry in VDSO
  linux-user: Add RISC-V zicfilp support in VDSO

 accel/tcg/cpu-exec.c                          |   2 +-
 disas/riscv.c                                 |  71 +++++++-
 disas/riscv.h                                 |   4 +
 linux-user/gen-vdso-elfn.c.inc                |   7 +
 linux-user/riscv/vdso-64.so                   | Bin 3944 -> 4128 bytes
 linux-user/riscv/vdso.S                       |  50 ++++++
 target/riscv/cpu.c                            |  17 ++
 target/riscv/cpu.h                            |  28 +++
 target/riscv/cpu_bits.h                       |  29 +++
 target/riscv/cpu_cfg.h                        |   2 +
 target/riscv/cpu_helper.c                     | 167 +++++++++++++++++-
 target/riscv/cpu_user.h                       |   1 +
 target/riscv/csr.c                            | 106 +++++++++++
 target/riscv/helper.h                         |   3 +
 target/riscv/insn16.decode                    |   4 +
 target/riscv/insn32.decode                    |  23 ++-
 target/riscv/insn_trans/trans_rva.c.inc       |  55 ++++++
 target/riscv/insn_trans/trans_rvi.c.inc       |  68 +++++++
 target/riscv/insn_trans/trans_rvzicfiss.c.inc | 155 ++++++++++++++++
 target/riscv/internals.h                      |   4 +
 target/riscv/op_helper.c                      |  49 +++++
 target/riscv/pmp.c                            |   5 +
 target/riscv/pmp.h                            |   3 +-
 target/riscv/tcg/tcg-cpu.c                    |  20 +++
 target/riscv/trace-events                     |   6 +
 target/riscv/translate.c                      |  75 ++++++++
 26 files changed, 945 insertions(+), 9 deletions(-)
 create mode 100644 target/riscv/insn_trans/trans_rvzicfiss.c.inc