riscv: KVM: allow Zilsd and Zclsd extensions for Guest/VM

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 <pincheng.plct@isrc.iscas.ac.cn>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20250826162939.1494021-5-pincheng.plct@isrc.iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 54f3ad7ed2e4bf2580c1659758bd9f89f7a451c8..6c536b2823c3f304e57cc7dafe59a1e27fb6df08 100644 (file)
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -192,6 +192,8 @@ enum KVM_RISCV_ISA_EXT_ID {
        KVM_RISCV_ISA_EXT_ZFBFMIN,
        KVM_RISCV_ISA_EXT_ZVFBFMIN,
        KVM_RISCV_ISA_EXT_ZVFBFWMA,
+       KVM_RISCV_ISA_EXT_ZCLSD,
+       KVM_RISCV_ISA_EXT_ZILSD,
        KVM_RISCV_ISA_EXT_MAX,
 };
 

diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 865dae903aa0f66cea8483576437f2402e9a7711..347c0a902d282746a9e9d98580e270cde53f9048 100644 (file)
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -63,6 +63,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
        KVM_ISA_EXT_ARR(ZCB),
        KVM_ISA_EXT_ARR(ZCD),
        KVM_ISA_EXT_ARR(ZCF),
+       KVM_ISA_EXT_ARR(ZCLSD),
        KVM_ISA_EXT_ARR(ZCMOP),
        KVM_ISA_EXT_ARR(ZFA),
        KVM_ISA_EXT_ARR(ZFBFMIN),
@@ -79,6 +80,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
        KVM_ISA_EXT_ARR(ZIHINTNTL),
        KVM_ISA_EXT_ARR(ZIHINTPAUSE),
        KVM_ISA_EXT_ARR(ZIHPM),
+       KVM_ISA_EXT_ARR(ZILSD),
        KVM_ISA_EXT_ARR(ZIMOP),
        KVM_ISA_EXT_ARR(ZKND),
        KVM_ISA_EXT_ARR(ZKNE),