Commit f51feae0 authored by Xianglai Li's avatar Xianglai Li
Browse files

LoongArch: arch/loongarch/kvm: Fix extioi restart issue 

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IBC7SN



------------------------------------------

When the virtual machine is restarted, the data in extioi is not zeroed,
and there is a residual set interrupt bit, resulting in a hang

Signed-off-by: default avatarXianglai Li <lixianglai@loongson.cn>
parent 46064348

arch/loongarch/include/asm/kvm_extioi.h

+1 −0
Original line number Diff line number Diff line
@@ -92,4 +92,5 @@ struct loongarch_extioi { 


void extioi_set_irq(struct loongarch_extioi *s, int irq, int level);

int kvm_loongarch_register_extioi_device(void);

int kvm_loongarch_reset_extioi(struct kvm *kvm);

#endif /* LOONGARCH_EXTIOI_H */

arch/loongarch/kvm/intc/extioi.c

+21 −0
Original line number Diff line number Diff line
@@ -781,3 +781,24 @@ int kvm_loongarch_register_extioi_device(void) 
	return kvm_register_device_ops(&kvm_loongarch_extioi_dev_ops,

					KVM_DEV_TYPE_LA_EXTIOI);

}



int kvm_loongarch_reset_extioi(struct kvm *kvm)

{

	struct loongarch_extioi *extioi = kvm->arch.extioi;

	unsigned long flags;

	u8 offset, size;

	u8 *pstart;



	if (!extioi)

		return -EINVAL;



	pstart = (char *)&extioi->nodetype;

	offset = (char *)&extioi->nodetype - (char *)extioi;

	size = sizeof(struct loongarch_extioi) - offset;



	loongarch_ext_irq_lock(extioi, flags);

	memset(pstart, 0, size);

	loongarch_ext_irq_unlock(extioi, flags);



	return 0;

}

arch/loongarch/kvm/vcpu.c

+2 −0
Original line number Diff line number Diff line
@@ -870,6 +870,8 @@ static int kvm_set_one_reg(struct kvm_vcpu *vcpu, 
			break;

		case KVM_REG_LOONGARCH_VCPU_RESET:

			vcpu->arch.st.guest_addr = 0;

			if (vcpu->vcpu_id == 0)

				kvm_loongarch_reset_extioi(vcpu->kvm);

			memset(&vcpu->arch.irq_pending, 0, sizeof(vcpu->arch.irq_pending));

			memset(&vcpu->arch.irq_clear, 0, sizeof(vcpu->arch.irq_clear));

			break;