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RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM

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Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zca, Zcf, Zcd and Zcb extensions for Guest/VM.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Acked-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240619113529.676940-11-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Clément Léger 2024-06-19 13:35:20 +02:00 committed by Palmer Dabbelt
parent 0ad70db5eb
commit d964e8f2ae
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2 changed files with 12 additions and 0 deletions
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4
arch/riscv/include/uapi/asm/kvm.h
View File

@ -169,6 +169,10 @@ enum KVM_RISCV_ISA_EXT_ID {
KVM_RISCV_ISA_EXT_ZACAS,
KVM_RISCV_ISA_EXT_SSCOFPMF,
KVM_RISCV_ISA_EXT_ZIMOP,
KVM_RISCV_ISA_EXT_ZCA,
KVM_RISCV_ISA_EXT_ZCB,
KVM_RISCV_ISA_EXT_ZCD,
KVM_RISCV_ISA_EXT_ZCF,
KVM_RISCV_ISA_EXT_MAX,
};

8
arch/riscv/kvm/vcpu_onereg.c
View File

@ -49,6 +49,10 @@ static const unsigned long kvm_isa_ext_arr[] = {
KVM_ISA_EXT_ARR(ZBKC),
KVM_ISA_EXT_ARR(ZBKX),
KVM_ISA_EXT_ARR(ZBS),
KVM_ISA_EXT_ARR(ZCA),
KVM_ISA_EXT_ARR(ZCB),
KVM_ISA_EXT_ARR(ZCD),
KVM_ISA_EXT_ARR(ZCF),
KVM_ISA_EXT_ARR(ZFA),
KVM_ISA_EXT_ARR(ZFH),
KVM_ISA_EXT_ARR(ZFHMIN),
@ -134,6 +138,10 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
case KVM_RISCV_ISA_EXT_ZBKC:
case KVM_RISCV_ISA_EXT_ZBKX:
case KVM_RISCV_ISA_EXT_ZBS:
case KVM_RISCV_ISA_EXT_ZCA:
case KVM_RISCV_ISA_EXT_ZCB:
case KVM_RISCV_ISA_EXT_ZCD:
case KVM_RISCV_ISA_EXT_ZCF:
case KVM_RISCV_ISA_EXT_ZFA:
case KVM_RISCV_ISA_EXT_ZFH:
case KVM_RISCV_ISA_EXT_ZFHMIN: