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Commit ec798660 authored by Gleb Natapov's avatar Gleb Natapov Committed by Avi Kivity
Browse files

KVM: cleanup pic reset 



kvm_pic_reset() is not used anywhere. Move reset logic from
pic_ioport_write() there.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 9a781977

arch/x86/kvm/i8259.c

+11 −41
Original line number Diff line number Diff line
@@ -275,23 +275,20 @@ void kvm_pic_reset(struct kvm_kpic_state *s) 
{

	int irq, i;

	struct kvm_vcpu *vcpu;

	u8 irr = s->irr, isr = s->imr;

	u8 edge_irr = s->irr & ~s->elcr;

	bool found = false;



	s->last_irr = 0;

	s->irr = 0;

	s->irr &= s->elcr;

	s->imr = 0;

	s->isr = 0;

	s->priority_add = 0;

	s->irq_base = 0;

	s->read_reg_select = 0;

	s->poll = 0;

	s->special_mask = 0;

	s->init_state = 0;

	s->auto_eoi = 0;

	s->rotate_on_auto_eoi = 0;

	s->read_reg_select = 0;

	if (!s->init4) {

		s->special_fully_nested_mode = 0;

	s->init4 = 0;

		s->auto_eoi = 0;

	}

	s->init_state = 1;



	kvm_for_each_vcpu(i, vcpu, s->pics_state->kvm)

		if (kvm_apic_accept_pic_intr(vcpu)) {
@@ -304,7 +301,7 @@ void kvm_pic_reset(struct kvm_kpic_state *s) 
		return;



	for (irq = 0; irq < PIC_NUM_PINS/2; irq++)

		if (irr & (1 << irq) || isr & (1 << irq))

		if (edge_irr & (1 << irq))

			pic_clear_isr(s, irq);

}
@@ -316,40 +313,13 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) 
	addr &= 1;

	if (addr == 0) {

		if (val & 0x10) {

			u8 edge_irr = s->irr & ~s->elcr;

			int i;

			bool found;

			struct kvm_vcpu *vcpu;



			s->init4 = val & 1;

			s->last_irr = 0;

			s->irr &= s->elcr;

			s->imr = 0;

			s->priority_add = 0;

			s->special_mask = 0;

			s->read_reg_select = 0;

			if (!s->init4) {

				s->special_fully_nested_mode = 0;

				s->auto_eoi = 0;

			}

			s->init_state = 1;

			if (val & 0x02)

				pr_pic_unimpl("single mode not supported");

			if (val & 0x08)

				pr_pic_unimpl(

						"level sensitive irq not supported");



			kvm_for_each_vcpu(i, vcpu, s->pics_state->kvm)

				if (kvm_apic_accept_pic_intr(vcpu)) {

					found = true;

					break;

				}





			if (found)

				for (irq = 0; irq < PIC_NUM_PINS/2; irq++)

					if (edge_irr & (1 << irq))

						pic_clear_isr(s, irq);

			kvm_pic_reset(s);

		} else if (val & 0x08) {

			if (val & 0x04)

				s->poll = 1;