[PATCH 00/16] riscv: Generate riscv instruction functions

[Charlie Jenkins via B4 Relay]

There is a lot of code that is manually manipulating riscv instructions.
Constructing these headers for new instructions is time consuming and
error prone.

The first patch in this series introduces the instruction definition
table along with a script that runs at compile time to create all of the
associated instruction manipulation functions. The remaining patches
migrate all of the manual instruction code to use these generated
functions.

The instruction definition table is generated from the riscv-unified-db[1],
an open source RVI project for instruction specifications. I am sending
this series at the same time as I am sending the patch to the
riscv-unified-db for the format of the instruction table. That patch can
be accessed on github [2].

A lot of the validation for these changes is from running all possible
32-bit or 16-bit integers through these functions to see that any given
instruction will produce to expected result. I give more detail on the
test cases in the notes of the first couple of patches.

For the KVM patches, I also introduce two test cases to ensure that the
instruction manipulation is working as expected, along with a bug fix of
the current implemention.

[1] https://github.com/riscv/riscv-unified-db
[2] https://github.com/riscv/riscv-unified-db/pull/1780

Signed-off-by: Charlie Jenkins <thecharlesjenkins@xxxxxxxxx>
---
Charlie Jenkins (16):
      riscv: Introduce instruction table generation
      riscv: alternatives: Use generated instruction headers for patching code
      riscv: kgdb: Use generated instruction headers
      riscv: kprobes: Use generated instruction headers
      riscv: cfi: Use generated instruction headers
      riscv: Use generated instruction headers for misaligned loads/stores
      riscv: kvm: Use generated instruction headers for csr code
      riscv: kvm: Fix MMIO emulation for sign-extended insns
      KVM: device: Add test device
      KVM: riscv: selftests: Add mmio test
      riscv: kvm: Use generated instruction headers for mmio emulation
      riscv: kvm: Add emulated test csr
      KVM: riscv: selftests: Add csr emulation test
      riscv: kvm: Use generated instruction headers for csr emulation
      riscv: kexec: Use generated instruction headers for kexec relocations
      riscv: Remove unused instruction headers

 arch/riscv/Kconfig.debug                      |    1 +
 arch/riscv/Makefile                           |    3 +
 arch/riscv/include/asm/Kbuild                 |    1 +
 arch/riscv/include/asm/insn.h                 |  563 +---------
 arch/riscv/include/asm/kvm_host.h             |   10 +
 arch/riscv/include/asm/kvm_vcpu_insn.h        |    5 +-
 arch/riscv/include/asm/kvm_vcpu_test_csr.h    |   15 +
 arch/riscv/kernel/alternative.c               |   23 +-
 arch/riscv/kernel/cfi.c                       |    6 +-
 arch/riscv/kernel/kgdb.c                      |  102 +-
 arch/riscv/kernel/machine_kexec_file.c        |   55 +-
 arch/riscv/kernel/probes/decode-insn.c        |    7 +-
 arch/riscv/kernel/probes/simulate-insn.c      |  253 ++---
 arch/riscv/kernel/probes/simulate-insn.h      |    7 +-
 arch/riscv/kernel/traps_misaligned.c          |  183 ++--
 arch/riscv/kvm/Kconfig.debug                  |   16 +
 arch/riscv/kvm/Makefile                       |    1 +
 arch/riscv/kvm/vcpu_insn.c                    |  233 ++---
 arch/riscv/kvm/vcpu_test_csr.c                |   21 +
 arch/riscv/tools/Makefile                     |   22 +
 arch/riscv/tools/insn.tbl                     | 1391 +++++++++++++++++++++++++
 arch/riscv/tools/insn_tbl.sh                  |  263 +++++
 include/uapi/linux/kvm.h                      |    2 +
 lib/Kconfig.debug                             |    6 +
 tools/testing/selftests/kvm/Makefile.kvm      |    2 +
 tools/testing/selftests/kvm/riscv/csr_test.c  |  123 +++
 tools/testing/selftests/kvm/riscv/mmio_test.c |  184 ++++
 virt/kvm/Kconfig.debug                        |   16 +
 virt/kvm/Makefile.kvm                         |    1 +
 virt/kvm/kvm_main.c                           |    8 +
 virt/kvm/mmio_test.c                          |   95 ++
 virt/kvm/mmio_test.h                          |   18 +
 32 files changed, 2624 insertions(+), 1012 deletions(-)
---
base-commit: dd9b004b7ff3289fb7bae35130c0a5c0537266af
change-id: ${change-id}

- Charlie