KVM: x86: Move KVM_{GET,SET}_IRQCHIP ioctl helpers to irq.c

Move the ioctl helpers for getting/setting fully in-kernel IRQ chip state
to irq.c, partly to trim down x86.c, but mostly in preparation for adding
a Kconfig to control support for in-kernel I/O APIC, PIC, and PIT
emulation.

No functional change intended.

Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/r/20250611213557.294358-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 0 insertions, 55 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 0ee1f7d311e5..787fc22dab54 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6395,61 +6395,6 @@ static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
 	return 0;
 }
 
-static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
-{
-	struct kvm_pic *pic = kvm->arch.vpic;
-	int r;
-
-	r = 0;
-	switch (chip->chip_id) {
-	case KVM_IRQCHIP_PIC_MASTER:
-		memcpy(&chip->chip.pic, &pic->pics[0],
-			sizeof(struct kvm_pic_state));
-		break;
-	case KVM_IRQCHIP_PIC_SLAVE:
-		memcpy(&chip->chip.pic, &pic->pics[1],
-			sizeof(struct kvm_pic_state));
-		break;
-	case KVM_IRQCHIP_IOAPIC:
-		kvm_get_ioapic(kvm, &chip->chip.ioapic);
-		break;
-	default:
-		r = -EINVAL;
-		break;
-	}
-	return r;
-}
-
-static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
-{
-	struct kvm_pic *pic = kvm->arch.vpic;
-	int r;
-
-	r = 0;
-	switch (chip->chip_id) {
-	case KVM_IRQCHIP_PIC_MASTER:
-		spin_lock(&pic->lock);
-		memcpy(&pic->pics[0], &chip->chip.pic,
-			sizeof(struct kvm_pic_state));
-		spin_unlock(&pic->lock);
-		break;
-	case KVM_IRQCHIP_PIC_SLAVE:
-		spin_lock(&pic->lock);
-		memcpy(&pic->pics[1], &chip->chip.pic,
-			sizeof(struct kvm_pic_state));
-		spin_unlock(&pic->lock);
-		break;
-	case KVM_IRQCHIP_IOAPIC:
-		kvm_set_ioapic(kvm, &chip->chip.ioapic);
-		break;
-	default:
-		r = -EINVAL;
-		break;
-	}
-	kvm_pic_update_irq(pic);
-	return r;
-}
-
 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
 {