On Sat, Apr 1, 2023 at 4:57 PM Anup Patel <apatel@xxxxxxxxxxxxxxxx> wrote:
>
> We extend the KVM ISA extension ONE_REG interface to allow KVM
> user space to detect and enable Zbb extension for Guest/VM.
>
> Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx>
Queued this patch for Linux-6.4
Thanks,
Anup
> ---
> arch/riscv/include/uapi/asm/kvm.h | 1 +
> arch/riscv/kvm/vcpu.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 d8ead5952ed9..47a7c3958229 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -106,6 +106,7 @@ enum KVM_RISCV_ISA_EXT_ID {
> KVM_RISCV_ISA_EXT_SVINVAL,
> KVM_RISCV_ISA_EXT_ZIHINTPAUSE,
> KVM_RISCV_ISA_EXT_ZICBOM,
> + KVM_RISCV_ISA_EXT_ZBB,
> KVM_RISCV_ISA_EXT_MAX,
> };
>
> diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
> index 3112697cb12d..02b49cb94561 100644
> --- a/arch/riscv/kvm/vcpu.c
> +++ b/arch/riscv/kvm/vcpu.c
> @@ -61,6 +61,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
> KVM_ISA_EXT_ARR(SSTC),
> KVM_ISA_EXT_ARR(SVINVAL),
> KVM_ISA_EXT_ARR(SVPBMT),
> + KVM_ISA_EXT_ARR(ZBB),
> KVM_ISA_EXT_ARR(ZIHINTPAUSE),
> KVM_ISA_EXT_ARR(ZICBOM),
> };
> @@ -99,6 +100,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
> case KVM_RISCV_ISA_EXT_SSTC:
> case KVM_RISCV_ISA_EXT_SVINVAL:
> case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
> + case KVM_RISCV_ISA_EXT_ZBB:
> return false;
> default:
> break;
> --
> 2.34.1
>
