diff options
Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r-- | arch/x86/kvm/i8259.c | 72 |
1 files changed, 47 insertions, 25 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 93825ff..f628234 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -3,6 +3,7 @@ * * Copyright (c) 2003-2004 Fabrice Bellard * Copyright (c) 2007 Intel Corporation + * Copyright 2009 Red Hat, Inc. and/or its affiliates. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -33,26 +34,41 @@ #include <linux/kvm_host.h> #include "trace.h" +static void pic_irq_request(struct kvm *kvm, int level); + static void pic_lock(struct kvm_pic *s) __acquires(&s->lock) { - raw_spin_lock(&s->lock); + spin_lock(&s->lock); } static void pic_unlock(struct kvm_pic *s) __releases(&s->lock) { bool wakeup = s->wakeup_needed; - struct kvm_vcpu *vcpu; + struct kvm_vcpu *vcpu, *found = NULL; + int i; s->wakeup_needed = false; - raw_spin_unlock(&s->lock); + spin_unlock(&s->lock); if (wakeup) { - vcpu = s->kvm->bsp_vcpu; - if (vcpu) - kvm_vcpu_kick(vcpu); + kvm_for_each_vcpu(i, vcpu, s->kvm) { + if (kvm_apic_accept_pic_intr(vcpu)) { + found = vcpu; + break; + } + } + + if (!found) + found = s->kvm->bsp_vcpu; + + if (!found) + return; + + kvm_make_request(KVM_REQ_EVENT, found); + kvm_vcpu_kick(found); } } @@ -173,10 +189,7 @@ static void pic_update_irq(struct kvm_pic *s) pic_set_irq1(&s->pics[0], 2, 0); } irq = pic_get_irq(&s->pics[0]); - if (irq >= 0) - s->irq_request(s->irq_request_opaque, 1); - else - s->irq_request(s->irq_request_opaque, 0); + pic_irq_request(s->kvm, irq >= 0); } void kvm_pic_update_irq(struct kvm_pic *s) @@ -261,8 +274,7 @@ int kvm_pic_read_irq(struct kvm *kvm) void kvm_pic_reset(struct kvm_kpic_state *s) { int irq; - struct kvm *kvm = s->pics_state->irq_request_opaque; - struct kvm_vcpu *vcpu0 = kvm->bsp_vcpu; + struct kvm_vcpu *vcpu0 = s->pics_state->kvm->bsp_vcpu; u8 irr = s->irr, isr = s->imr; s->last_irr = 0; @@ -297,14 +309,17 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) addr &= 1; if (addr == 0) { if (val & 0x10) { - kvm_pic_reset(s); /* init */ - /* - * deassert a pending interrupt - */ - s->pics_state->irq_request(s->pics_state-> - irq_request_opaque, 0); - s->init_state = 1; s->init4 = val & 1; + s->last_irr = 0; + 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) printk(KERN_ERR "single mode not supported"); if (val & 0x08) @@ -356,10 +371,20 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) } } else switch (s->init_state) { - case 0: /* normal mode */ + case 0: { /* normal mode */ + u8 imr_diff = s->imr ^ val, + off = (s == &s->pics_state->pics[0]) ? 0 : 8; s->imr = val; + for (irq = 0; irq < PIC_NUM_PINS/2; irq++) + if (imr_diff & (1 << irq)) + kvm_fire_mask_notifiers( + s->pics_state->kvm, + SELECT_PIC(irq + off), + irq + off, + !!(s->imr & (1 << irq))); pic_update_irq(s->pics_state); break; + } case 1: s->irq_base = val & 0xf8; s->init_state = 2; @@ -518,9 +543,8 @@ static int picdev_read(struct kvm_io_device *this, /* * callback when PIC0 irq status changed */ -static void pic_irq_request(void *opaque, int level) +static void pic_irq_request(struct kvm *kvm, int level) { - struct kvm *kvm = opaque; struct kvm_vcpu *vcpu = kvm->bsp_vcpu; struct kvm_pic *s = pic_irqchip(kvm); int irq = pic_get_irq(&s->pics[0]); @@ -545,12 +569,10 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm) s = kzalloc(sizeof(struct kvm_pic), GFP_KERNEL); if (!s) return NULL; - raw_spin_lock_init(&s->lock); + spin_lock_init(&s->lock); s->kvm = kvm; s->pics[0].elcr_mask = 0xf8; s->pics[1].elcr_mask = 0xde; - s->irq_request = pic_irq_request; - s->irq_request_opaque = kvm; s->pics[0].pics_state = s; s->pics[1].pics_state = s; |