RISC-V: KVM: Allow Zabha extension for Guest/VM

Extend the KVM ISA extension ONE_REG interface to allow KVM user space
to detect and enable Zabha extension for Guest/VM.

Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Link: https://lore.kernel.org/r/4074feb27819e23bab05b0fd6441a38bf0b6a5e2.1732854096.git.zhouquan@iscas.ac.cn
Signed-off-by: Anup Patel <anup@brainfault.org>

Author: zcxGGmu

arch/riscv/include/uapi/asm/kvm.h

@@ -180,6 +180,7 @@ enum KVM_RISCV_ISA_EXT_ID {
 	KVM_RISCV_ISA_EXT_SVADE,
 	KVM_RISCV_ISA_EXT_SVADU,
 	KVM_RISCV_ISA_EXT_SVVPTC,
+	KVM_RISCV_ISA_EXT_ZABHA,
 	KVM_RISCV_ISA_EXT_MAX,
 };
 

arch/riscv/kvm/vcpu_onereg.c

@@ -47,6 +47,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
 	KVM_ISA_EXT_ARR(SVNAPOT),
 	KVM_ISA_EXT_ARR(SVPBMT),
 	KVM_ISA_EXT_ARR(SVVPTC),
+	KVM_ISA_EXT_ARR(ZABHA),
 	KVM_ISA_EXT_ARR(ZACAS),
 	KVM_ISA_EXT_ARR(ZAWRS),
 	KVM_ISA_EXT_ARR(ZBA),
@@ -147,6 +148,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
 	case KVM_RISCV_ISA_EXT_SVINVAL:
 	case KVM_RISCV_ISA_EXT_SVNAPOT:
 	case KVM_RISCV_ISA_EXT_SVVPTC:
+	case KVM_RISCV_ISA_EXT_ZABHA:
 	case KVM_RISCV_ISA_EXT_ZACAS:
 	case KVM_RISCV_ISA_EXT_ZAWRS:
 	case KVM_RISCV_ISA_EXT_ZBA: