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Diffstat (limited to 'drivers/kvm/ioapic.c')
-rw-r--r--drivers/kvm/ioapic.c402
1 files changed, 0 insertions, 402 deletions
diff --git a/drivers/kvm/ioapic.c b/drivers/kvm/ioapic.c
deleted file mode 100644
index f8236774c1b..00000000000
--- a/drivers/kvm/ioapic.c
+++ /dev/null
@@ -1,402 +0,0 @@
-/*
- * Copyright (C) 2001 MandrakeSoft S.A.
- *
- * MandrakeSoft S.A.
- * 43, rue d'Aboukir
- * 75002 Paris - France
- * http://www.linux-mandrake.com/
- * http://www.mandrakesoft.com/
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Yunhong Jiang <yunhong.jiang@intel.com>
- * Yaozu (Eddie) Dong <eddie.dong@intel.com>
- * Based on Xen 3.1 code.
- */
-
-#include "kvm.h"
-#include "x86.h"
-
-#include <linux/kvm.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/smp.h>
-#include <linux/hrtimer.h>
-#include <linux/io.h>
-#include <asm/processor.h>
-#include <asm/page.h>
-#include <asm/current.h>
-#include "irq.h"
-#if 0
-#define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg)
-#else
-#define ioapic_debug(fmt, arg...)
-#endif
-static void ioapic_deliver(struct kvm_ioapic *vioapic, int irq);
-
-static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
- unsigned long addr,
- unsigned long length)
-{
- unsigned long result = 0;
-
- switch (ioapic->ioregsel) {
- case IOAPIC_REG_VERSION:
- result = ((((IOAPIC_NUM_PINS - 1) & 0xff) << 16)
- | (IOAPIC_VERSION_ID & 0xff));
- break;
-
- case IOAPIC_REG_APIC_ID:
- case IOAPIC_REG_ARB_ID:
- result = ((ioapic->id & 0xf) << 24);
- break;
-
- default:
- {
- u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;
- u64 redir_content;
-
- ASSERT(redir_index < IOAPIC_NUM_PINS);
-
- redir_content = ioapic->redirtbl[redir_index].bits;
- result = (ioapic->ioregsel & 0x1) ?
- (redir_content >> 32) & 0xffffffff :
- redir_content & 0xffffffff;
- break;
- }
- }
-
- return result;
-}
-
-static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
-{
- union ioapic_redir_entry *pent;
-
- pent = &ioapic->redirtbl[idx];
-
- if (!pent->fields.mask) {
- ioapic_deliver(ioapic, idx);
- if (pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
- pent->fields.remote_irr = 1;
- }
- if (!pent->fields.trig_mode)
- ioapic->irr &= ~(1 << idx);
-}
-
-static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
-{
- unsigned index;
-
- switch (ioapic->ioregsel) {
- case IOAPIC_REG_VERSION:
- /* Writes are ignored. */
- break;
-
- case IOAPIC_REG_APIC_ID:
- ioapic->id = (val >> 24) & 0xf;
- break;
-
- case IOAPIC_REG_ARB_ID:
- break;
-
- default:
- index = (ioapic->ioregsel - 0x10) >> 1;
-
- ioapic_debug("change redir index %x val %x\n", index, val);
- if (index >= IOAPIC_NUM_PINS)
- return;
- if (ioapic->ioregsel & 1) {
- ioapic->redirtbl[index].bits &= 0xffffffff;
- ioapic->redirtbl[index].bits |= (u64) val << 32;
- } else {
- ioapic->redirtbl[index].bits &= ~0xffffffffULL;
- ioapic->redirtbl[index].bits |= (u32) val;
- ioapic->redirtbl[index].fields.remote_irr = 0;
- }
- if (ioapic->irr & (1 << index))
- ioapic_service(ioapic, index);
- break;
- }
-}
-
-static void ioapic_inj_irq(struct kvm_ioapic *ioapic,
- struct kvm_vcpu *vcpu,
- u8 vector, u8 trig_mode, u8 delivery_mode)
-{
- ioapic_debug("irq %d trig %d deliv %d\n", vector, trig_mode,
- delivery_mode);
-
- ASSERT((delivery_mode == IOAPIC_FIXED) ||
- (delivery_mode == IOAPIC_LOWEST_PRIORITY));
-
- kvm_apic_set_irq(vcpu, vector, trig_mode);
-}
-
-static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
- u8 dest_mode)
-{
- u32 mask = 0;
- int i;
- struct kvm *kvm = ioapic->kvm;
- struct kvm_vcpu *vcpu;
-
- ioapic_debug("dest %d dest_mode %d\n", dest, dest_mode);
-
- if (dest_mode == 0) { /* Physical mode. */
- if (dest == 0xFF) { /* Broadcast. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i)
- if (kvm->vcpus[i] && kvm->vcpus[i]->arch.apic)
- mask |= 1 << i;
- return mask;
- }
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (kvm_apic_match_physical_addr(vcpu->arch.apic, dest)) {
- if (vcpu->arch.apic)
- mask = 1 << i;
- break;
- }
- }
- } else if (dest != 0) /* Logical mode, MDA non-zero. */
- for (i = 0; i < KVM_MAX_VCPUS; ++i) {
- vcpu = kvm->vcpus[i];
- if (!vcpu)
- continue;
- if (vcpu->arch.apic &&
- kvm_apic_match_logical_addr(vcpu->arch.apic, dest))
- mask |= 1 << vcpu->vcpu_id;
- }
- ioapic_debug("mask %x\n", mask);
- return mask;
-}
-
-static void ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
-{
- u8 dest = ioapic->redirtbl[irq].fields.dest_id;
- u8 dest_mode = ioapic->redirtbl[irq].fields.dest_mode;
- u8 delivery_mode = ioapic->redirtbl[irq].fields.delivery_mode;
- u8 vector = ioapic->redirtbl[irq].fields.vector;
- u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
- u32 deliver_bitmask;
- struct kvm_vcpu *vcpu;
- int vcpu_id;
-
- ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
- "vector=%x trig_mode=%x\n",
- dest, dest_mode, delivery_mode, vector, trig_mode);
-
- deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode);
- if (!deliver_bitmask) {
- ioapic_debug("no target on destination\n");
- return;
- }
-
- switch (delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
- deliver_bitmask);
- if (vcpu != NULL)
- ioapic_inj_irq(ioapic, vcpu, vector,
- trig_mode, delivery_mode);
- else
- ioapic_debug("null lowest prio vcpu: "
- "mask=%x vector=%x delivery_mode=%x\n",
- deliver_bitmask, vector, IOAPIC_LOWEST_PRIORITY);
- break;
- case IOAPIC_FIXED:
- for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
- if (!(deliver_bitmask & (1 << vcpu_id)))
- continue;
- deliver_bitmask &= ~(1 << vcpu_id);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu) {
- ioapic_inj_irq(ioapic, vcpu, vector,
- trig_mode, delivery_mode);
- }
- }
- break;
-
- /* TODO: NMI */
- default:
- printk(KERN_WARNING "Unsupported delivery mode %d\n",
- delivery_mode);
- break;
- }
-}
-
-void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
-{
- u32 old_irr = ioapic->irr;
- u32 mask = 1 << irq;
- union ioapic_redir_entry entry;
-
- if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
- entry = ioapic->redirtbl[irq];
- level ^= entry.fields.polarity;
- if (!level)
- ioapic->irr &= ~mask;
- else {
- ioapic->irr |= mask;
- if ((!entry.fields.trig_mode && old_irr != ioapic->irr)
- || !entry.fields.remote_irr)
- ioapic_service(ioapic, irq);
- }
- }
-}
-
-static int get_eoi_gsi(struct kvm_ioapic *ioapic, int vector)
-{
- int i;
-
- for (i = 0; i < IOAPIC_NUM_PINS; i++)
- if (ioapic->redirtbl[i].fields.vector == vector)
- return i;
- return -1;
-}
-
-void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
-{
- struct kvm_ioapic *ioapic = kvm->arch.vioapic;
- union ioapic_redir_entry *ent;
- int gsi;
-
- gsi = get_eoi_gsi(ioapic, vector);
- if (gsi == -1) {
- printk(KERN_WARNING "Can't find redir item for %d EOI\n",
- vector);
- return;
- }
-
- ent = &ioapic->redirtbl[gsi];
- ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG);
-
- ent->fields.remote_irr = 0;
- if (!ent->fields.mask && (ioapic->irr & (1 << gsi)))
- ioapic_deliver(ioapic, gsi);
-}
-
-static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr)
-{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
-
- return ((addr >= ioapic->base_address &&
- (addr < ioapic->base_address + IOAPIC_MEM_LENGTH)));
-}
-
-static void ioapic_mmio_read(struct kvm_io_device *this, gpa_t addr, int len,
- void *val)
-{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
- u32 result;
-
- ioapic_debug("addr %lx\n", (unsigned long)addr);
- ASSERT(!(addr & 0xf)); /* check alignment */
-
- addr &= 0xff;
- switch (addr) {
- case IOAPIC_REG_SELECT:
- result = ioapic->ioregsel;
- break;
-
- case IOAPIC_REG_WINDOW:
- result = ioapic_read_indirect(ioapic, addr, len);
- break;
-
- default:
- result = 0;
- break;
- }
- switch (len) {
- case 8:
- *(u64 *) val = result;
- break;
- case 1:
- case 2:
- case 4:
- memcpy(val, (char *)&result, len);
- break;
- default:
- printk(KERN_WARNING "ioapic: wrong length %d\n", len);
- }
-}
-
-static void ioapic_mmio_write(struct kvm_io_device *this, gpa_t addr, int len,
- const void *val)
-{
- struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;
- u32 data;
-
- ioapic_debug("ioapic_mmio_write addr=%p len=%d val=%p\n",
- (void*)addr, len, val);
- ASSERT(!(addr & 0xf)); /* check alignment */
- if (len == 4 || len == 8)
- data = *(u32 *) val;
- else {
- printk(KERN_WARNING "ioapic: Unsupported size %d\n", len);
- return;
- }
-
- addr &= 0xff;
- switch (addr) {
- case IOAPIC_REG_SELECT:
- ioapic->ioregsel = data;
- break;
-
- case IOAPIC_REG_WINDOW:
- ioapic_write_indirect(ioapic, data);
- break;
-#ifdef CONFIG_IA64
- case IOAPIC_REG_EOI:
- kvm_ioapic_update_eoi(ioapic, data);
- break;
-#endif
-
- default:
- break;
- }
-}
-
-void kvm_ioapic_reset(struct kvm_ioapic *ioapic)
-{
- int i;
-
- for (i = 0; i < IOAPIC_NUM_PINS; i++)
- ioapic->redirtbl[i].fields.mask = 1;
- ioapic->base_address = IOAPIC_DEFAULT_BASE_ADDRESS;
- ioapic->ioregsel = 0;
- ioapic->irr = 0;
- ioapic->id = 0;
-}
-
-int kvm_ioapic_init(struct kvm *kvm)
-{
- struct kvm_ioapic *ioapic;
-
- ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);
- if (!ioapic)
- return -ENOMEM;
- kvm->arch.vioapic = ioapic;
- kvm_ioapic_reset(ioapic);
- ioapic->dev.read = ioapic_mmio_read;
- ioapic->dev.write = ioapic_mmio_write;
- ioapic->dev.in_range = ioapic_in_range;
- ioapic->dev.private = ioapic;
- ioapic->kvm = kvm;
- kvm_io_bus_register_dev(&kvm->mmio_bus, &ioapic->dev);
- return 0;
-}
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