[PATCH v4 05/11] RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM

[Clément Léger]

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 at rivosinc.com>
Reviewed-by: Anup Patel <anup at brainfault.org>
Acked-by: Anup Patel <anup at brainfault.org>
---
 arch/riscv/include/uapi/asm/kvm.h | 4 ++++
 arch/riscv/kvm/vcpu_onereg.c      | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
index 35a12aa1953e..57db3fea679f 100644
--- a/arch/riscv/include/uapi/asm/kvm.h
+++ b/arch/riscv/include/uapi/asm/kvm.h
@@ -168,6 +168,10 @@ enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_ZTSO,
 	KVM_RISCV_ISA_EXT_ZACAS,
 	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,
 };
 
diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
index 12436f6f0d20..a2747a6dbdb6 100644
--- a/arch/riscv/kvm/vcpu_onereg.c
+++ b/arch/riscv/kvm/vcpu_onereg.c
@@ -48,6 +48,10 @@ 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),
@@ -128,6 +132,10 @@ 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:
-- 
2.43.0