Commit c7fa3c48 authored by Anup Patel's avatar Anup Patel Committed by Anup Patel
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RISC-V: KVM: Treat SBI HFENCE calls as NOPs 



We should treat SBI HFENCE calls as NOPs until nested virtualization
is supported by KVM RISC-V. This will help us test booting a hypervisor
under KVM RISC-V.

Signed-off-by: default avatarAnup Patel <apatel@ventanamicro.com>
Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Signed-off-by: default avatarAnup Patel <anup@brainfault.org>
parent b4bbb95e

arch/riscv/kvm/vcpu_sbi_replace.c

+5 −1
Original line number Diff line number Diff line
@@ -117,7 +117,11 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run 
	case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:

	case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:

	case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:

	/* TODO: implement for nested hypervisor case */

		/*

		 * Until nested virtualization is implemented, the

		 * SBI HFENCE calls should be treated as NOPs

		 */

		break;

	default:

		ret = -EOPNOTSUPP;

	}