[PATCH 2/5] RISC-V: KVM: Allow Zicbop extension for Guest/VM
Andrew Jones
ajones at ventanamicro.com
Tue Jun 24 06:46:08 PDT 2025
On Tue, Jun 17, 2025 at 09:10:30PM +0800, zhouquan at iscas.ac.cn wrote:
> From: Quan Zhou <zhouquan at iscas.ac.cn>
>
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Zicbop extension for Guest/VM.
>
> Signed-off-by: Quan Zhou <zhouquan at iscas.ac.cn>
> ---
> arch/riscv/include/uapi/asm/kvm.h | 1 +
> arch/riscv/kvm/vcpu_onereg.c | 2 ++
> 2 files changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index 0863ca178066..56959d277e86 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -185,6 +185,7 @@ enum KVM_RISCV_ISA_EXT_ID {
> KVM_RISCV_ISA_EXT_ZICCRSE,
> KVM_RISCV_ISA_EXT_ZAAMO,
> KVM_RISCV_ISA_EXT_ZALRSC,
> + KVM_RISCV_ISA_EXT_ZICBOP,
> KVM_RISCV_ISA_EXT_MAX,
> };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index b08a22eaa7a7..d444ec9e9e8e 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -68,6 +68,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
> KVM_ISA_EXT_ARR(ZFH),
> KVM_ISA_EXT_ARR(ZFHMIN),
> KVM_ISA_EXT_ARR(ZICBOM),
> + KVM_ISA_EXT_ARR(ZICBOP),
> KVM_ISA_EXT_ARR(ZICBOZ),
> KVM_ISA_EXT_ARR(ZICCRSE),
> KVM_ISA_EXT_ARR(ZICNTR),
> @@ -171,6 +172,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
> case KVM_RISCV_ISA_EXT_ZFA:
> case KVM_RISCV_ISA_EXT_ZFH:
> case KVM_RISCV_ISA_EXT_ZFHMIN:
> + case KVM_RISCV_ISA_EXT_ZICBOP:
> case KVM_RISCV_ISA_EXT_ZICCRSE:
> case KVM_RISCV_ISA_EXT_ZICNTR:
> case KVM_RISCV_ISA_EXT_ZICOND:
> --
> 2.34.1
>
Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
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