[PATCH v1 17/24] LoongArch: KVM: Implement handle idle exception

From: Tianrui Zhao
Date: Mon Feb 13 2023 - 21:57:28 EST


Implement kvm handle loongarch vcpu idle exception, using kvm_vcpu_block
to emulate it.

Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
arch/loongarch/kvm/exit.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index f02e2b940..a6beb83a0 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -191,3 +191,15 @@ int _kvm_complete_iocsr_read(struct kvm_vcpu *vcpu, struct kvm_run *run)

return er;
}
+
+int _kvm_emu_idle(struct kvm_vcpu *vcpu)
+{
+ ++vcpu->stat.idle_exits;
+ trace_kvm_exit(vcpu, KVM_TRACE_EXIT_IDLE);
+ if (!vcpu->arch.irq_pending) {
+ kvm_save_timer(vcpu);
+ kvm_vcpu_block(vcpu);
+ }
+
+ return EMULATE_DONE;
+}
--
2.31.1