Merge patch series "Add support for a few Zc* extensions, Zcmop and Zimop"

Clément Léger <cleger@rivosinc.com> says:

Add support for (yet again) more RVA23U64 missing extensions. Add
support for Zimop, Zcmop, Zca, Zcf, Zcd and Zcb extensions ISA string
parsing, hwprobe and kvm support. Zce, Zcmt and Zcmp extensions have
been left out since they target microcontrollers/embedded CPUs and are
not needed by RVA23U64.

Since Zc* extensions states that C implies Zca, Zcf (if F and RV32), Zcd
(if D), this series modifies the way ISA string is parsed and now does
it in two phases. First one parses the string and the second one
validates it for the final ISA description.

* b4-shazam-merge:
  KVM: riscv: selftests: Add Zcmop extension to get-reg-list test
  RISC-V: KVM: Allow Zcmop extension for Guest/VM
  riscv: hwprobe: export Zcmop ISA extension
  riscv: add ISA extension parsing for Zcmop
  dt-bindings: riscv: add Zcmop ISA extension description
  KVM: riscv: selftests: Add some Zc* extensions to get-reg-list test
  RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM
  riscv: hwprobe: export Zca, Zcf, Zcd and Zcb ISA extensions
  riscv: add ISA parsing for Zca, Zcf, Zcd and Zcb
  riscv: add ISA extensions validation callback
  dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension description
  KVM: riscv: selftests: Add Zimop extension to get-reg-list test
  RISC-V: KVM: Allow Zimop extension for Guest/VM
  riscv: hwprobe: export Zimop ISA extension
  riscv: add ISA extension parsing for Zimop
  dt-bindings: riscv: add Zimop ISA extension description

Link: https://lore.kernel.org/r/20240619113529.676940-1-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>