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Subject[PATCH v5 00/16] Add support for a few Zc* extensions, Zcmop and Zimop
Date
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.

Link: https://lore.kernel.org/linux-riscv/20240404103254.1752834-1-cleger@rivosinc.com/ [1]
Link: https://lore.kernel.org/all/20240409143839.558784-1-cleger@rivosinc.com/ [2]

---

v5:
- Merged in Zimop to avoid any uneeded series dependencies
- Rework dependency resolution loop to loop on source isa first rather
than on all extensions.
- Disabled extensions in source isa once set in resolved isa
- Rename riscv_resolve_isa() parameters

v4:
- Modify validate() callbacks to return 0, -EPROBEDEFER or another
error.
- v3: https://lore.kernel.org/all/20240423124326.2532796-1-cleger@rivosinc.com/

v3:
- Fix typo "exists" -> "exist"
- Remove C implies Zca, Zcd, Zcf, dt-bindings rules
- Rework ISA string resolver to handle dependencies
- v2: https://lore.kernel.org/all/20240418124300.1387978-1-cleger@rivosinc.com/

v2:
- Add Zc* dependencies validation in dt-bindings
- v1: https://lore.kernel.org/lkml/20240410091106.749233-1-cleger@rivosinc.com/

Clément Léger (16):
dt-bindings: riscv: add Zimop ISA extension description
riscv: add ISA extension parsing for Zimop
riscv: hwprobe: export Zimop ISA extension
RISC-V: KVM: Allow Zimop extension for Guest/VM
KVM: riscv: selftests: Add Zimop extension to get-reg-list test
dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension
description
riscv: add ISA extensions validation callback
riscv: add ISA parsing for Zca, Zcf, Zcd and Zcb
riscv: hwprobe: export Zca, Zcf, Zcd and Zcb ISA extensions
RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM
KVM: riscv: selftests: Add some Zc* extensions to get-reg-list test
dt-bindings: riscv: add Zcmop ISA extension description
riscv: add ISA extension parsing for Zcmop
riscv: hwprobe: export Zcmop ISA extension
RISC-V: KVM: Allow Zcmop extension for Guest/VM
KVM: riscv: selftests: Add Zcmop extension to get-reg-list test

Documentation/arch/riscv/hwprobe.rst | 28 ++
.../devicetree/bindings/riscv/extensions.yaml | 95 +++++++
arch/riscv/include/asm/cpufeature.h | 26 +-
arch/riscv/include/asm/hwcap.h | 6 +
arch/riscv/include/uapi/asm/hwprobe.h | 6 +
arch/riscv/include/uapi/asm/kvm.h | 6 +
arch/riscv/kernel/cpufeature.c | 244 ++++++++++++------
arch/riscv/kernel/sys_hwprobe.c | 6 +
arch/riscv/kvm/vcpu_onereg.c | 12 +
.../selftests/kvm/riscv/get-reg-list.c | 24 ++
10 files changed, 366 insertions(+), 87 deletions(-)

--
2.43.0


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