!1646 Fixed extioi hardware emulation bugs on loongarch

Merge Pull Request from: @lixianglai 
 
ISSU:  #I7QOYY 
 
Link:https://gitee.com/openeuler/kernel/pulls/1646 

Reviewed-by: Kevin Zhu <zhukeqian1@huawei.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

arch/loongarch/kvm/csr.c

@@ -347,8 +347,6 @@ static int kvm_iocsr_common_set(struct kvm_run *run, struct kvm_vcpu *vcpu,
 static int kvm_misc_set(struct kvm_run *run, struct kvm_vcpu *vcpu, u32 addr,
 		u64 val)
 {
-	if ((val & KVM_IOCSRF_MISC_FUNC_EXT_IOI_EN) && vcpu->vcpu_id == 0)
-		kvm_setup_ls3a_extirq(vcpu->kvm);
 	return kvm_iocsr_common_set(run, vcpu, addr, val);
 }
 
@@ -653,9 +651,6 @@ int _kvm_set_iocsr(struct kvm *kvm, struct kvm_iocsr_entry *__user argp)
 	}
 	spin_unlock(&kvm->arch.iocsr_lock);
 
-	if (tmp.addr == KVM_IOCSR_MISC_FUNC)
-		kvm_enable_ls3a_extirq(kvm, tmp.data & KVM_IOCSRF_MISC_FUNC_EXT_IOI_EN);
-
 out:
 	return r;
 }

arch/loongarch/kvm/intc/ls3a_ext_irq.c

@@ -110,9 +110,6 @@ void msi_irq_handler(struct kvm *kvm, int irq, int level)
 	struct ls3a_kvm_extirq *s = ls3a_ext_irqchip(kvm);
 	struct kvm_ls3a_extirq_state *state = &(s->ls3a_ext_irq);
 
-	if (!atomic64_read(&s->enabled))
-		return;
-
 	kvm_debug("ext_irq_handler:irq = %d,level = %d\n", irq, level);
 
 	ls3a_ext_irq_lock(s, flags);
@@ -731,7 +728,6 @@ int kvm_create_ls3a_ext_irq(struct kvm *kvm)
 	memset((void *)&s->ls3a_ext_irq, 0x0, sizeof(struct kvm_ls3a_extirq_state));
 
 	spin_lock_init(&s->lock);
-	atomic64_set(&s->enabled, 0);
 	s->kvm = kvm;
 
 	/*
@@ -872,18 +868,6 @@ int kvm_setup_ls3a_extirq(struct kvm *kvm)
 	memset(extirq_state, 0,	sizeof(struct kvm_ls3a_extirq_state));
 	ls3a_ext_irq_unlock(v_extirq, flags);
 
-	atomic64_set(&v_extirq->enabled, 1);
-
-	return 0;
-}
-
-int kvm_enable_ls3a_extirq(struct kvm *kvm, bool enable)
-{
-	struct ls3a_kvm_extirq *v_extirq = ls3a_ext_irqchip(kvm);
-
-	if (v_extirq)
-		atomic64_set(&v_extirq->enabled, enable);
-
 	return 0;
 }
 
@@ -891,7 +875,7 @@ void kvm_dump_ls3a_extirq_state(struct seq_file *s,
 		struct ls3a_kvm_extirq *irqchip)
 {
 	struct kvm_ls3a_extirq_state *extirq;
-	int i = 0, j = 0;
+	int i, j = 0;
 	unsigned long flags;
 
 	seq_puts(s, "LS3A ext irqchip state:\n");
@@ -901,8 +885,7 @@ void kvm_dump_ls3a_extirq_state(struct seq_file *s,
 
 	extirq = &(irqchip->ls3a_ext_irq);
 	ls3a_ext_irq_lock(irqchip, flags);
-	i = (int)atomic64_read(&irqchip->enabled);
-	seq_printf(s, "ext irq enabled:%d", i);
+	seq_puts(s, "ext irq enabled");
 	seq_puts(s, "\nenabled:(Not Enabled)");
 	for (i = 0; i < EXTIOI_IRQS; i++) {
 		if (!test_bit(i, (void *)&extirq->ext_en))

arch/loongarch/kvm/intc/ls3a_ext_irq.h

@@ -98,7 +98,6 @@ typedef struct kvm_ls3a_extirq_state {
 struct ls3a_kvm_extirq {
 	spinlock_t lock;
 	struct kvm *kvm;
-	atomic64_t enabled;
 	struct kvm_io_device device;
 	struct kvm_ls3a_extirq_state ls3a_ext_irq;
 };
@@ -126,6 +125,5 @@ int kvm_set_ls3a_extirq(struct kvm *kvm,
 void kvm_destroy_ls3a_ext_irq(struct kvm *kvm);
 void msi_irq_handler(struct kvm *kvm, int irq, int level);
 int kvm_setup_ls3a_extirq(struct kvm *kvm);
-int kvm_enable_ls3a_extirq(struct kvm *kvm, bool enable);
 void kvm_dump_ls3a_extirq_state(struct seq_file *m, struct ls3a_kvm_extirq *irqchip);
 #endif

arch/loongarch/kvm/loongarch.c

@@ -973,7 +973,7 @@ static int _kvm_set_one_reg(struct kvm_vcpu *vcpu,
 	case KVM_REG_LOONGARCH_VCPU_RESET:
 		kvm_reset_timer(vcpu);
 		if (vcpu->vcpu_id == 0)
-			kvm_enable_ls3a_extirq(vcpu->kvm, false);
+			kvm_setup_ls3a_extirq(vcpu->kvm);
 		memset(&vcpu->arch.irq_pending, 0, sizeof(vcpu->arch.irq_pending));
 		memset(&vcpu->arch.irq_clear, 0, sizeof(vcpu->arch.irq_clear));