Re: [PATCH v2 4/5] riscv: KVM: allow Zilsd and Zclsd extensions for Guest/VM
From: Anup Patel <anup@brainfault.org>
Date: 2026-01-05 09:02:20
Also in:
kvm, kvm-riscv, linux-devicetree, linux-kselftest, linux-riscv, lkml
On Tue, Aug 26, 2025 at 10:00 PM Pincheng Wang [off-list ref] wrote:
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Extend the KVM ISA extension ONE_REG interface to allow KVM user space to detect and enable Zilsd and Zclsd extensions for Guest/VM. Signed-off-by: Pincheng Wang <redacted> --- arch/riscv/include/uapi/asm/kvm.h | 2 ++ arch/riscv/kvm/vcpu_onereg.c | 2 ++ 2 files changed, 4 insertions(+)diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h index 5f59fd226cc5..beb7ce06dce8 100644 --- a/arch/riscv/include/uapi/asm/kvm.h +++ b/arch/riscv/include/uapi/asm/kvm.h@@ -174,6 +174,8 @@ enum KVM_RISCV_ISA_EXT_ID { KVM_RISCV_ISA_EXT_ZCD, KVM_RISCV_ISA_EXT_ZCF, KVM_RISCV_ISA_EXT_ZCMOP, + KVM_RISCV_ISA_EXT_ZCLSD, + KVM_RISCV_ISA_EXT_ZILSD, KVM_RISCV_ISA_EXT_ZAWRS, KVM_RISCV_ISA_EXT_SMNPM, KVM_RISCV_ISA_EXT_SSNPM,
The KVM_RISCV_ISA_EXT_ZCLSD and KVM_RISCV_ISA_EXT_ZILSD MUST BE inserted at the end of enum to maintain backward compatibility in the UAPI header.
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diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c index 2e1b646f0d61..8219769fc4a1 100644 --- a/arch/riscv/kvm/vcpu_onereg.c +++ b/arch/riscv/kvm/vcpu_onereg.c@@ -64,6 +64,7 @@ static const unsigned long kvm_isa_ext_arr[] = { KVM_ISA_EXT_ARR(ZCD), KVM_ISA_EXT_ARR(ZCF), KVM_ISA_EXT_ARR(ZCMOP), + KVM_ISA_EXT_ARR(ZCLSD), KVM_ISA_EXT_ARR(ZFA), KVM_ISA_EXT_ARR(ZFH), KVM_ISA_EXT_ARR(ZFHMIN),@@ -78,6 +79,7 @@ static const unsigned long kvm_isa_ext_arr[] = { KVM_ISA_EXT_ARR(ZIHINTPAUSE), KVM_ISA_EXT_ARR(ZIHPM), KVM_ISA_EXT_ARR(ZIMOP), + KVM_ISA_EXT_ARR(ZILSD), KVM_ISA_EXT_ARR(ZKND), KVM_ISA_EXT_ARR(ZKNE), KVM_ISA_EXT_ARR(ZKNH),
Both ZCLSD and ZILSD must be inserted in alphabetical order in the kvm_isa_ext_arr[] array. I have taken care of the above comments at the time of merging. Reviewed-by: Anup Patel <anup@brainfault.org> Queued this patch for Linux-6.20 Thanks, Anup