[PATCH v8 00/19] rv64i CPU, RVA22U64 profile support

[Daniel Henrique Barboza]

Hi,

This v8 contains a few more extra, trivial changes, related to the
design of the rv64i.

We stripped away all its defaults, including priv_ver and satp mode.
Handling priv_ver was somewhat trivial: profiles and regular extensions
that are user set will now bump the CPU priv_ver if needed. This will
only affect rv64i since generic CPUs are already set to
PRIV_VERSION_LATEST and vendor CPUs does not allow extensions to be
enabled.

Dealing with satp_mode was trickier. First we need to fix the setter()
of satp user flags to allow users to set satp_max_supported of the CPU
if none was set. Then we need extra code during finalize() to handle an
assert that csr.c is throwing due to the lack of a satp_max_supported
value in the CPU. We could either set a default value or error out, and
decided to set a default value. Otherwise, when doing a rv64i CPU
introspection (e.g. query-cpu-model-expansion), we would be obligated to
set a satp mode, which is silly.

I intend to add a proper documentation on both rv64i and the overall
profile extension design. Since documentation can be done after the code
freeze let's wait for this to be merged first.

No other major changes made. Patches based on Alistair's
riscv-to-apply.next.

Patches missing acks: 3, 4, 5, 6

Changes from v7:
- patch 3 (new):
  - allow users to set satp max supported via user flags
- patch 4 (new):
  - set default satp mode max to MBARE during finalize
- patch 5 (new):
  - update update priv_ver on user_set extensions
- patch 6 (patch 3 from v7):
  - remove default priv_ver and satp values from rv64i_bare_cpu_init()
  - remove default values of zicntr and zihpm from rv64i_bare_cpu_init()
- patch 18 (patch 15 from v7):
  - do not check 'edata' in cpu_cfg_ext_get_name() loop
  - remove extra blank line
- v7 link: 
https://lore.kernel.org/qemu-riscv/20231031203916.197332-1-dbarboza@ventanamicro.com/

Daniel Henrique Barboza (19):
  target/riscv: create TYPE_RISCV_VENDOR_CPU
  target/riscv/tcg: do not use "!generic" CPU checks
  target/riscv/cpu.c: set satp_max_supported in cpu_riscv_set_satp()
  target/riscv/cpu.c: set satp_mode_max MBARE during satp_finalize()
  target/riscv/tcg: update priv_ver on user_set extensions
  target/riscv: add rv64i CPU
  target/riscv: add zicbop extension flag
  target/riscv/tcg: add 'zic64b' support
  riscv-qmp-cmds.c: expose named features in cpu_model_expansion
  target/riscv: add rva22u64 profile definition
  target/riscv/kvm: add 'rva22u64' flag as unavailable
  target/riscv/tcg: add user flag for profile support
  target/riscv/tcg: add MISA user options hash
  target/riscv/tcg: add riscv_cpu_write_misa_bit()
  target/riscv/tcg: handle profile MISA bits
  target/riscv/tcg: add hash table insert helpers
  target/riscv/tcg: honor user choice for G MISA bits
  target/riscv/tcg: validate profiles during finalize
  riscv-qmp-cmds.c: add profile flags in cpu-model-expansion

 hw/riscv/virt.c               |   5 +
 target/riscv/cpu-qom.h        |   3 +
 target/riscv/cpu.c            | 119 ++++++++++--
 target/riscv/cpu.h            |  13 ++
 target/riscv/cpu_cfg.h        |   3 +
 target/riscv/kvm/kvm-cpu.c    |   7 +-
 target/riscv/riscv-qmp-cmds.c |  44 ++++-
 target/riscv/tcg/tcg-cpu.c    | 341 +++++++++++++++++++++++++++++-----
 8 files changed, 473 insertions(+), 62 deletions(-)

-- 
2.41.0