[PATCH v3 00/11] Add support for a few Zc* extensions as well as Zcmop

Clément Léger
2024-04-23T12:43:41Z

Add support for (yet again) more RVA23U64 missing extensions. Add
support for 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.

This series is based on the Zimop one [1]. An additional fix [2] should
be applied to correctly test that series.

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]

---

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 (11):
dt-bindings: riscv: add Zca, Zcf, Zcd and Zcb ISA extension
description
riscv: add ISA extensions validation
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 | 24 ++
.../devicetree/bindings/riscv/extensions.yaml | 90 +++++++
arch/riscv/include/asm/cpufeature.h | 1 +
arch/riscv/include/asm/hwcap.h | 5 +
arch/riscv/include/uapi/asm/hwprobe.h | 5 +
arch/riscv/include/uapi/asm/kvm.h | 5 +
arch/riscv/kernel/cpufeature.c | 249 ++++++++++++------
arch/riscv/kernel/sys_hwprobe.c | 5 +
arch/riscv/kvm/vcpu_onereg.c | 10 +
.../selftests/kvm/riscv/get-reg-list.c | 20 ++
10 files changed, 329 insertions(+), 85 deletions(-)

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2.43.0