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-rw-r--r--virt/kvm/ioapic.c403
-rw-r--r--virt/kvm/ioapic.h95
-rw-r--r--virt/kvm/iodev.h63
-rw-r--r--virt/kvm/kvm_main.c1400
4 files changed, 1961 insertions, 0 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
new file mode 100644
index 00000000000..317f8e211cd
--- /dev/null
+++ b/virt/kvm/ioapic.c
@@ -0,0 +1,403 @@
+/*
+ * 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 <linux/kvm_host.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 "ioapic.h"
+#include "lapic.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->kvm, 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;
+}
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
new file mode 100644
index 00000000000..7f16675fe78
--- /dev/null
+++ b/virt/kvm/ioapic.h
@@ -0,0 +1,95 @@
+#ifndef __KVM_IO_APIC_H
+#define __KVM_IO_APIC_H
+
+#include <linux/kvm_host.h>
+
+#include "iodev.h"
+
+struct kvm;
+struct kvm_vcpu;
+
+#define IOAPIC_NUM_PINS KVM_IOAPIC_NUM_PINS
+#define IOAPIC_VERSION_ID 0x11 /* IOAPIC version */
+#define IOAPIC_EDGE_TRIG 0
+#define IOAPIC_LEVEL_TRIG 1
+
+#define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
+#define IOAPIC_MEM_LENGTH 0x100
+
+/* Direct registers. */
+#define IOAPIC_REG_SELECT 0x00
+#define IOAPIC_REG_WINDOW 0x10
+#define IOAPIC_REG_EOI 0x40 /* IA64 IOSAPIC only */
+
+/* Indirect registers. */
+#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */
+#define IOAPIC_REG_VERSION 0x01
+#define IOAPIC_REG_ARB_ID 0x02 /* x86 IOAPIC only */
+
+/*ioapic delivery mode*/
+#define IOAPIC_FIXED 0x0
+#define IOAPIC_LOWEST_PRIORITY 0x1
+#define IOAPIC_PMI 0x2
+#define IOAPIC_NMI 0x4
+#define IOAPIC_INIT 0x5
+#define IOAPIC_EXTINT 0x7
+
+struct kvm_ioapic {
+ u64 base_address;
+ u32 ioregsel;
+ u32 id;
+ u32 irr;
+ u32 pad;
+ union ioapic_redir_entry {
+ u64 bits;
+ struct {
+ u8 vector;
+ u8 delivery_mode:3;
+ u8 dest_mode:1;
+ u8 delivery_status:1;
+ u8 polarity:1;
+ u8 remote_irr:1;
+ u8 trig_mode:1;
+ u8 mask:1;
+ u8 reserve:7;
+ u8 reserved[4];
+ u8 dest_id;
+ } fields;
+ } redirtbl[IOAPIC_NUM_PINS];
+ struct kvm_io_device dev;
+ struct kvm *kvm;
+};
+
+#ifdef DEBUG
+#define ASSERT(x) \
+do { \
+ if (!(x)) { \
+ printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
+ __FILE__, __LINE__, #x); \
+ BUG(); \
+ } \
+} while (0)
+#else
+#define ASSERT(x) do { } while (0)
+#endif
+
+static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
+{
+ return kvm->arch.vioapic;
+}
+
+#ifdef CONFIG_IA64
+static inline int irqchip_in_kernel(struct kvm *kvm)
+{
+ return 1;
+}
+#endif
+
+struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
+ unsigned long bitmap);
+void kvm_ioapic_update_eoi(struct kvm *kvm, int vector);
+int kvm_ioapic_init(struct kvm *kvm);
+void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
+void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
+
+#endif
diff --git a/virt/kvm/iodev.h b/virt/kvm/iodev.h
new file mode 100644
index 00000000000..c14e642027b
--- /dev/null
+++ b/virt/kvm/iodev.h
@@ -0,0 +1,63 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __KVM_IODEV_H__
+#define __KVM_IODEV_H__
+
+#include <linux/kvm_types.h>
+
+struct kvm_io_device {
+ void (*read)(struct kvm_io_device *this,
+ gpa_t addr,
+ int len,
+ void *val);
+ void (*write)(struct kvm_io_device *this,
+ gpa_t addr,
+ int len,
+ const void *val);
+ int (*in_range)(struct kvm_io_device *this, gpa_t addr);
+ void (*destructor)(struct kvm_io_device *this);
+
+ void *private;
+};
+
+static inline void kvm_iodevice_read(struct kvm_io_device *dev,
+ gpa_t addr,
+ int len,
+ void *val)
+{
+ dev->read(dev, addr, len, val);
+}
+
+static inline void kvm_iodevice_write(struct kvm_io_device *dev,
+ gpa_t addr,
+ int len,
+ const void *val)
+{
+ dev->write(dev, addr, len, val);
+}
+
+static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
+{
+ return dev->in_range(dev, addr);
+}
+
+static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
+{
+ if (dev->destructor)
+ dev->destructor(dev);
+}
+
+#endif /* __KVM_IODEV_H__ */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
new file mode 100644
index 00000000000..3c4fe26096f
--- /dev/null
+++ b/virt/kvm/kvm_main.c
@@ -0,0 +1,1400 @@
+/*
+ * Kernel-based Virtual Machine driver for Linux
+ *
+ * This module enables machines with Intel VT-x extensions to run virtual
+ * machines without emulation or binary translation.
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ *
+ * Authors:
+ * Avi Kivity <avi@qumranet.com>
+ * Yaniv Kamay <yaniv@qumranet.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "iodev.h"
+
+#include <linux/kvm_host.h>
+#include <linux/kvm.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/percpu.h>
+#include <linux/gfp.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/reboot.h>
+#include <linux/debugfs.h>
+#include <linux/highmem.h>
+#include <linux/file.h>
+#include <linux/sysdev.h>
+#include <linux/cpu.h>
+#include <linux/sched.h>
+#include <linux/cpumask.h>
+#include <linux/smp.h>
+#include <linux/anon_inodes.h>
+#include <linux/profile.h>
+#include <linux/kvm_para.h>
+#include <linux/pagemap.h>
+#include <linux/mman.h>
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+
+MODULE_AUTHOR("Qumranet");
+MODULE_LICENSE("GPL");
+
+DEFINE_SPINLOCK(kvm_lock);
+LIST_HEAD(vm_list);
+
+static cpumask_t cpus_hardware_enabled;
+
+struct kmem_cache *kvm_vcpu_cache;
+EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
+
+static __read_mostly struct preempt_ops kvm_preempt_ops;
+
+static struct dentry *debugfs_dir;
+
+static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
+ unsigned long arg);
+
+static inline int valid_vcpu(int n)
+{
+ return likely(n >= 0 && n < KVM_MAX_VCPUS);
+}
+
+/*
+ * Switches to specified vcpu, until a matching vcpu_put()
+ */
+void vcpu_load(struct kvm_vcpu *vcpu)
+{
+ int cpu;
+
+ mutex_lock(&vcpu->mutex);
+ cpu = get_cpu();
+ preempt_notifier_register(&vcpu->preempt_notifier);
+ kvm_arch_vcpu_load(vcpu, cpu);
+ put_cpu();
+}
+
+void vcpu_put(struct kvm_vcpu *vcpu)
+{
+ preempt_disable();
+ kvm_arch_vcpu_put(vcpu);
+ preempt_notifier_unregister(&vcpu->preempt_notifier);
+ preempt_enable();
+ mutex_unlock(&vcpu->mutex);
+}
+
+static void ack_flush(void *_completed)
+{
+}
+
+void kvm_flush_remote_tlbs(struct kvm *kvm)
+{
+ int i, cpu;
+ cpumask_t cpus;
+ struct kvm_vcpu *vcpu;
+
+ cpus_clear(cpus);
+ for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+ vcpu = kvm->vcpus[i];
+ if (!vcpu)
+ continue;
+ if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
+ continue;
+ cpu = vcpu->cpu;
+ if (cpu != -1 && cpu != raw_smp_processor_id())
+ cpu_set(cpu, cpus);
+ }
+ if (cpus_empty(cpus))
+ return;
+ ++kvm->stat.remote_tlb_flush;
+ smp_call_function_mask(cpus, ack_flush, NULL, 1);
+}
+
+int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
+{
+ struct page *page;
+ int r;
+
+ mutex_init(&vcpu->mutex);
+ vcpu->cpu = -1;
+ vcpu->kvm = kvm;
+ vcpu->vcpu_id = id;
+ init_waitqueue_head(&vcpu->wq);
+
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page) {
+ r = -ENOMEM;
+ goto fail;
+ }
+ vcpu->run = page_address(page);
+
+ r = kvm_arch_vcpu_init(vcpu);
+ if (r < 0)
+ goto fail_free_run;
+ return 0;
+
+fail_free_run:
+ free_page((unsigned long)vcpu->run);
+fail:
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_init);
+
+void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+ kvm_arch_vcpu_uninit(vcpu);
+ free_page((unsigned long)vcpu->run);
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
+
+static struct kvm *kvm_create_vm(void)
+{
+ struct kvm *kvm = kvm_arch_create_vm();
+
+ if (IS_ERR(kvm))
+ goto out;
+
+ kvm->mm = current->mm;
+ atomic_inc(&kvm->mm->mm_count);
+ spin_lock_init(&kvm->mmu_lock);
+ kvm_io_bus_init(&kvm->pio_bus);
+ mutex_init(&kvm->lock);
+ kvm_io_bus_init(&kvm->mmio_bus);
+ spin_lock(&kvm_lock);
+ list_add(&kvm->vm_list, &vm_list);
+ spin_unlock(&kvm_lock);
+out:
+ return kvm;
+}
+
+/*
+ * Free any memory in @free but not in @dont.
+ */
+static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont)
+{
+ if (!dont || free->rmap != dont->rmap)
+ vfree(free->rmap);
+
+ if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
+ vfree(free->dirty_bitmap);
+
+ free->npages = 0;
+ free->dirty_bitmap = NULL;
+ free->rmap = NULL;
+}
+
+void kvm_free_physmem(struct kvm *kvm)
+{
+ int i;
+
+ for (i = 0; i < kvm->nmemslots; ++i)
+ kvm_free_physmem_slot(&kvm->memslots[i], NULL);
+}
+
+static void kvm_destroy_vm(struct kvm *kvm)
+{
+ struct mm_struct *mm = kvm->mm;
+
+ spin_lock(&kvm_lock);
+ list_del(&kvm->vm_list);
+ spin_unlock(&kvm_lock);
+ kvm_io_bus_destroy(&kvm->pio_bus);
+ kvm_io_bus_destroy(&kvm->mmio_bus);
+ kvm_arch_destroy_vm(kvm);
+ mmdrop(mm);
+}
+
+static int kvm_vm_release(struct inode *inode, struct file *filp)
+{
+ struct kvm *kvm = filp->private_data;
+
+ kvm_destroy_vm(kvm);
+ return 0;
+}
+
+/*
+ * Allocate some memory and give it an address in the guest physical address
+ * space.
+ *
+ * Discontiguous memory is allowed, mostly for framebuffers.
+ *
+ * Must be called holding mmap_sem for write.
+ */
+int __kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ int r;
+ gfn_t base_gfn;
+ unsigned long npages;
+ unsigned long i;
+ struct kvm_memory_slot *memslot;
+ struct kvm_memory_slot old, new;
+
+ r = -EINVAL;
+ /* General sanity checks */
+ if (mem->memory_size & (PAGE_SIZE - 1))
+ goto out;
+ if (mem->guest_phys_addr & (PAGE_SIZE - 1))
+ goto out;
+ if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
+ goto out;
+ if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
+ goto out;
+
+ memslot = &kvm->memslots[mem->slot];
+ base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
+ npages = mem->memory_size >> PAGE_SHIFT;
+
+ if (!npages)
+ mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
+
+ new = old = *memslot;
+
+ new.base_gfn = base_gfn;
+ new.npages = npages;
+ new.flags = mem->flags;
+
+ /* Disallow changing a memory slot's size. */
+ r = -EINVAL;
+ if (npages && old.npages && npages != old.npages)
+ goto out_free;
+
+ /* Check for overlaps */
+ r = -EEXIST;
+ for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
+ struct kvm_memory_slot *s = &kvm->memslots[i];
+
+ if (s == memslot)
+ continue;
+ if (!((base_gfn + npages <= s->base_gfn) ||
+ (base_gfn >= s->base_gfn + s->npages)))
+ goto out_free;
+ }
+
+ /* Free page dirty bitmap if unneeded */
+ if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
+ new.dirty_bitmap = NULL;
+
+ r = -ENOMEM;
+
+ /* Allocate if a slot is being created */
+ if (npages && !new.rmap) {
+ new.rmap = vmalloc(npages * sizeof(struct page *));
+
+ if (!new.rmap)
+ goto out_free;
+
+ memset(new.rmap, 0, npages * sizeof(*new.rmap));
+
+ new.user_alloc = user_alloc;
+ new.userspace_addr = mem->userspace_addr;
+ }
+
+ /* Allocate page dirty bitmap if needed */
+ if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
+ unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
+
+ new.dirty_bitmap = vmalloc(dirty_bytes);
+ if (!new.dirty_bitmap)
+ goto out_free;
+ memset(new.dirty_bitmap, 0, dirty_bytes);
+ }
+
+ if (mem->slot >= kvm->nmemslots)
+ kvm->nmemslots = mem->slot + 1;
+
+ *memslot = new;
+
+ r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
+ if (r) {
+ *memslot = old;
+ goto out_free;
+ }
+
+ kvm_free_physmem_slot(&old, &new);
+ return 0;
+
+out_free:
+ kvm_free_physmem_slot(&new, &old);
+out:
+ return r;
+
+}
+EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
+
+int kvm_set_memory_region(struct kvm *kvm,
+ struct kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ int r;
+
+ down_write(&current->mm->mmap_sem);
+ r = __kvm_set_memory_region(kvm, mem, user_alloc);
+ up_write(&current->mm->mmap_sem);
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_set_memory_region);
+
+int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
+ struct
+ kvm_userspace_memory_region *mem,
+ int user_alloc)
+{
+ if (mem->slot >= KVM_MEMORY_SLOTS)
+ return -EINVAL;
+ return kvm_set_memory_region(kvm, mem, user_alloc);
+}
+
+int kvm_get_dirty_log(struct kvm *kvm,
+ struct kvm_dirty_log *log, int *is_dirty)
+{
+ struct kvm_memory_slot *memslot;
+ int r, i;
+ int n;
+ unsigned long any = 0;
+
+ r = -EINVAL;
+ if (log->slot >= KVM_MEMORY_SLOTS)
+ goto out;
+
+ memslot = &kvm->memslots[log->slot];
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
+
+ for (i = 0; !any && i < n/sizeof(long); ++i)
+ any = memslot->dirty_bitmap[i];
+
+ r = -EFAULT;
+ if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
+ goto out;
+
+ if (any)
+ *is_dirty = 1;
+
+ r = 0;
+out:
+ return r;
+}
+
+int is_error_page(struct page *page)
+{
+ return page == bad_page;
+}
+EXPORT_SYMBOL_GPL(is_error_page);
+
+static inline unsigned long bad_hva(void)
+{
+ return PAGE_OFFSET;
+}
+
+int kvm_is_error_hva(unsigned long addr)
+{
+ return addr == bad_hva();
+}
+EXPORT_SYMBOL_GPL(kvm_is_error_hva);
+
+static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+{
+ int i;
+
+ for (i = 0; i < kvm->nmemslots; ++i) {
+ struct kvm_memory_slot *memslot = &kvm->memslots[i];
+
+ if (gfn >= memslot->base_gfn
+ && gfn < memslot->base_gfn + memslot->npages)
+ return memslot;
+ }
+ return NULL;
+}
+
+struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
+{
+ gfn = unalias_gfn(kvm, gfn);
+ return __gfn_to_memslot(kvm, gfn);
+}
+
+int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
+{
+ int i;
+
+ gfn = unalias_gfn(kvm, gfn);
+ for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
+ struct kvm_memory_slot *memslot = &kvm->memslots[i];
+
+ if (gfn >= memslot->base_gfn
+ && gfn < memslot->base_gfn + memslot->npages)
+ return 1;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
+
+static unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
+{
+ struct kvm_memory_slot *slot;
+
+ gfn = unalias_gfn(kvm, gfn);
+ slot = __gfn_to_memslot(kvm, gfn);
+ if (!slot)
+ return bad_hva();
+ return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
+}
+
+/*
+ * Requires current->mm->mmap_sem to be held
+ */
+struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
+{
+ struct page *page[1];
+ unsigned long addr;
+ int npages;
+
+ might_sleep();
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr)) {
+ get_page(bad_page);
+ return bad_page;
+ }
+
+ npages = get_user_pages(current, current->mm, addr, 1, 1, 1, page,
+ NULL);
+
+ if (npages != 1) {
+ get_page(bad_page);
+ return bad_page;
+ }
+
+ return page[0];
+}
+
+EXPORT_SYMBOL_GPL(gfn_to_page);
+
+void kvm_release_page_clean(struct page *page)
+{
+ put_page(page);
+}
+EXPORT_SYMBOL_GPL(kvm_release_page_clean);
+
+void kvm_release_page_dirty(struct page *page)
+{
+ if (!PageReserved(page))
+ SetPageDirty(page);
+ put_page(page);
+}
+EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
+
+static int next_segment(unsigned long len, int offset)
+{
+ if (len > PAGE_SIZE - offset)
+ return PAGE_SIZE - offset;
+ else
+ return len;
+}
+
+int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
+ int len)
+{
+ int r;
+ unsigned long addr;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = copy_from_user(data, (void __user *)addr + offset, len);
+ if (r)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_read_guest_page);
+
+int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_read_guest);
+
+int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
+ unsigned long len)
+{
+ int r;
+ unsigned long addr;
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int offset = offset_in_page(gpa);
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len);
+ if (r)
+ return -EFAULT;
+ return 0;
+}
+EXPORT_SYMBOL(kvm_read_guest_atomic);
+
+int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
+ int offset, int len)
+{
+ int r;
+ unsigned long addr;
+
+ addr = gfn_to_hva(kvm, gfn);
+ if (kvm_is_error_hva(addr))
+ return -EFAULT;
+ r = copy_to_user((void __user *)addr + offset, data, len);
+ if (r)
+ return -EFAULT;
+ mark_page_dirty(kvm, gfn);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_write_guest_page);
+
+int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
+ unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ data += seg;
+ ++gfn;
+ }
+ return 0;
+}
+
+int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
+{
+ return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
+}
+EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
+
+int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
+{
+ gfn_t gfn = gpa >> PAGE_SHIFT;
+ int seg;
+ int offset = offset_in_page(gpa);
+ int ret;
+
+ while ((seg = next_segment(len, offset)) != 0) {
+ ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
+ if (ret < 0)
+ return ret;
+ offset = 0;
+ len -= seg;
+ ++gfn;
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_clear_guest);
+
+void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
+{
+ struct kvm_memory_slot *memslot;
+
+ gfn = unalias_gfn(kvm, gfn);
+ memslot = __gfn_to_memslot(kvm, gfn);
+ if (memslot && memslot->dirty_bitmap) {
+ unsigned long rel_gfn = gfn - memslot->base_gfn;
+
+ /* avoid RMW */
+ if (!test_bit(rel_gfn, memslot->dirty_bitmap))
+ set_bit(rel_gfn, memslot->dirty_bitmap);
+ }
+}
+
+/*
+ * The vCPU has executed a HLT instruction with in-kernel mode enabled.
+ */
+void kvm_vcpu_block(struct kvm_vcpu *vcpu)
+{
+ DECLARE_WAITQUEUE(wait, current);
+
+ add_wait_queue(&vcpu->wq, &wait);
+
+ /*
+ * We will block until either an interrupt or a signal wakes us up
+ */
+ while (!kvm_cpu_has_interrupt(vcpu)
+ && !signal_pending(current)
+ && !kvm_arch_vcpu_runnable(vcpu)) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ vcpu_put(vcpu);
+ schedule();
+ vcpu_load(vcpu);
+ }
+
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&vcpu->wq, &wait);
+}
+
+void kvm_resched(struct kvm_vcpu *vcpu)
+{
+ if (!need_resched())
+ return;
+ cond_resched();
+}
+EXPORT_SYMBOL_GPL(kvm_resched);
+
+static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct kvm_vcpu *vcpu = vma->vm_file->private_data;
+ struct page *page;
+
+ if (vmf->pgoff == 0)
+ page = virt_to_page(vcpu->run);
+ else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
+ page = virt_to_page(vcpu->arch.pio_data);
+ else
+ return VM_FAULT_SIGBUS;
+ get_page(page);
+ vmf->page = page;
+ return 0;
+}
+
+static struct vm_operations_struct kvm_vcpu_vm_ops = {
+ .fault = kvm_vcpu_fault,
+};
+
+static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ vma->vm_ops = &kvm_vcpu_vm_ops;
+ return 0;
+}
+
+static int kvm_vcpu_release(struct inode *inode, struct file *filp)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+
+ fput(vcpu->kvm->filp);
+ return 0;
+}
+
+static struct file_operations kvm_vcpu_fops = {
+ .release = kvm_vcpu_release,
+ .unlocked_ioctl = kvm_vcpu_ioctl,
+ .compat_ioctl = kvm_vcpu_ioctl,
+ .mmap = kvm_vcpu_mmap,
+};
+
+/*
+ * Allocates an inode for the vcpu.
+ */
+static int create_vcpu_fd(struct kvm_vcpu *vcpu)
+{
+ int fd, r;
+ struct inode *inode;
+ struct file *file;
+
+ r = anon_inode_getfd(&fd, &inode, &file,
+ "kvm-vcpu", &kvm_vcpu_fops, vcpu);
+ if (r)
+ return r;
+ atomic_inc(&vcpu->kvm->filp->f_count);
+ return fd;
+}
+
+/*
+ * Creates some virtual cpus. Good luck creating more than one.
+ */
+static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
+{
+ int r;
+ struct kvm_vcpu *vcpu;
+
+ if (!valid_vcpu(n))
+ return -EINVAL;
+
+ vcpu = kvm_arch_vcpu_create(kvm, n);
+ if (IS_ERR(vcpu))
+ return PTR_ERR(vcpu);
+
+ preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
+
+ r = kvm_arch_vcpu_setup(vcpu);
+ if (r)
+ goto vcpu_destroy;
+
+ mutex_lock(&kvm->lock);
+ if (kvm->vcpus[n]) {
+ r = -EEXIST;
+ mutex_unlock(&kvm->lock);
+ goto vcpu_destroy;
+ }
+ kvm->vcpus[n] = vcpu;
+ mutex_unlock(&kvm->lock);
+
+ /* Now it's all set up, let userspace reach it */
+ r = create_vcpu_fd(vcpu);
+ if (r < 0)
+ goto unlink;
+ return r;
+
+unlink:
+ mutex_lock(&kvm->lock);
+ kvm->vcpus[n] = NULL;
+ mutex_unlock(&kvm->lock);
+vcpu_destroy:
+ kvm_arch_vcpu_destroy(vcpu);
+ return r;
+}
+
+static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
+{
+ if (sigset) {
+ sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
+ vcpu->sigset_active = 1;
+ vcpu->sigset = *sigset;
+ } else
+ vcpu->sigset_active = 0;
+ return 0;
+}
+
+static long kvm_vcpu_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm_vcpu *vcpu = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ int r;
+
+ if (vcpu->kvm->mm != current->mm)
+ return -EIO;
+ switch (ioctl) {
+ case KVM_RUN:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
+ break;
+ case KVM_GET_REGS: {
+ struct kvm_regs kvm_regs;
+
+ memset(&kvm_regs, 0, sizeof kvm_regs);
+ r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_REGS: {
+ struct kvm_regs kvm_regs;
+
+ r = -EFAULT;
+ if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_GET_SREGS: {
+ struct kvm_sregs kvm_sregs;
+
+ memset(&kvm_sregs, 0, sizeof kvm_sregs);
+ r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_SREGS: {
+ struct kvm_sregs kvm_sregs;
+
+ r = -EFAULT;
+ if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_TRANSLATE: {
+ struct kvm_translation tr;
+
+ r = -EFAULT;
+ if (copy_from_user(&tr, argp, sizeof tr))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &tr, sizeof tr))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_DEBUG_GUEST: {
+ struct kvm_debug_guest dbg;
+
+ r = -EFAULT;
+ if (copy_from_user(&dbg, argp, sizeof dbg))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_SIGNAL_MASK: {
+ struct kvm_signal_mask __user *sigmask_arg = argp;
+ struct kvm_signal_mask kvm_sigmask;
+ sigset_t sigset, *p;
+
+ p = NULL;
+ if (argp) {
+ r = -EFAULT;
+ if (copy_from_user(&kvm_sigmask, argp,
+ sizeof kvm_sigmask))
+ goto out;
+ r = -EINVAL;
+ if (kvm_sigmask.len != sizeof sigset)
+ goto out;
+ r = -EFAULT;
+ if (copy_from_user(&sigset, sigmask_arg->sigset,
+ sizeof sigset))
+ goto out;
+ p = &sigset;
+ }
+ r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
+ break;
+ }
+ case KVM_GET_FPU: {
+ struct kvm_fpu fpu;
+
+ memset(&fpu, 0, sizeof fpu);
+ r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu);
+ if (r)
+ goto out;
+ r = -EFAULT;
+ if (copy_to_user(argp, &fpu, sizeof fpu))
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_SET_FPU: {
+ struct kvm_fpu fpu;
+
+ r = -EFAULT;
+ if (copy_from_user(&fpu, argp, sizeof fpu))
+ goto out;
+ r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ default:
+ r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
+ }
+out:
+ return r;
+}
+
+static long kvm_vm_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ struct kvm *kvm = filp->private_data;
+ void __user *argp = (void __user *)arg;
+ int r;
+
+ if (kvm->mm != current->mm)
+ return -EIO;
+ switch (ioctl) {
+ case KVM_CREATE_VCPU:
+ r = kvm_vm_ioctl_create_vcpu(kvm, arg);
+ if (r < 0)
+ goto out;
+ break;
+ case KVM_SET_USER_MEMORY_REGION: {
+ struct kvm_userspace_memory_region kvm_userspace_mem;
+
+ r = -EFAULT;
+ if (copy_from_user(&kvm_userspace_mem, argp,
+ sizeof kvm_userspace_mem))
+ goto out;
+
+ r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
+ if (r)
+ goto out;
+ break;
+ }
+ case KVM_GET_DIRTY_LOG: {
+ struct kvm_dirty_log log;
+
+ r = -EFAULT;
+ if (copy_from_user(&log, argp, sizeof log))
+ goto out;
+ r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
+ if (r)
+ goto out;
+ break;
+ }
+ default:
+ r = kvm_arch_vm_ioctl(filp, ioctl, arg);
+ }
+out:
+ return r;
+}
+
+static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+ struct kvm *kvm = vma->vm_file->private_data;
+ struct page *page;
+
+ if (!kvm_is_visible_gfn(kvm, vmf->pgoff))
+ return VM_FAULT_SIGBUS;
+ page = gfn_to_page(kvm, vmf->pgoff);
+ if (is_error_page(page)) {
+ kvm_release_page_clean(page);
+ return VM_FAULT_SIGBUS;
+ }
+ vmf->page = page;
+ return 0;
+}
+
+static struct vm_operations_struct kvm_vm_vm_ops = {
+ .fault = kvm_vm_fault,
+};
+
+static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ vma->vm_ops = &kvm_vm_vm_ops;
+ return 0;
+}
+
+static struct file_operations kvm_vm_fops = {
+ .release = kvm_vm_release,
+ .unlocked_ioctl = kvm_vm_ioctl,
+ .compat_ioctl = kvm_vm_ioctl,
+ .mmap = kvm_vm_mmap,
+};
+
+static int kvm_dev_ioctl_create_vm(void)
+{
+ int fd, r;
+ struct inode *inode;
+ struct file *file;
+ struct kvm *kvm;
+
+ kvm = kvm_create_vm();
+ if (IS_ERR(kvm))
+ return PTR_ERR(kvm);
+ r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
+ if (r) {
+ kvm_destroy_vm(kvm);
+ return r;
+ }
+
+ kvm->filp = file;
+
+ return fd;
+}
+
+static long kvm_dev_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ long r = -EINVAL;
+
+ switch (ioctl) {
+ case KVM_GET_API_VERSION:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = KVM_API_VERSION;
+ break;
+ case KVM_CREATE_VM:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = kvm_dev_ioctl_create_vm();
+ break;
+ case KVM_CHECK_EXTENSION:
+ r = kvm_dev_ioctl_check_extension((long)argp);
+ break;
+ case KVM_GET_VCPU_MMAP_SIZE:
+ r = -EINVAL;
+ if (arg)
+ goto out;
+ r = 2 * PAGE_SIZE;
+ break;
+ default:
+ return kvm_arch_dev_ioctl(filp, ioctl, arg);
+ }
+out:
+ return r;
+}
+
+static struct file_operations kvm_chardev_ops = {
+ .unlocked_ioctl = kvm_dev_ioctl,
+ .compat_ioctl = kvm_dev_ioctl,
+};
+
+static struct miscdevice kvm_dev = {
+ KVM_MINOR,
+ "kvm",
+ &kvm_chardev_ops,
+};
+
+static void hardware_enable(void *junk)
+{
+ int cpu = raw_smp_processor_id();
+
+ if (cpu_isset(cpu, cpus_hardware_enabled))
+ return;
+ cpu_set(cpu, cpus_hardware_enabled);
+ kvm_arch_hardware_enable(NULL);
+}
+
+static void hardware_disable(void *junk)
+{
+ int cpu = raw_smp_processor_id();
+
+ if (!cpu_isset(cpu, cpus_hardware_enabled))
+ return;
+ cpu_clear(cpu, cpus_hardware_enabled);
+ decache_vcpus_on_cpu(cpu);
+ kvm_arch_hardware_disable(NULL);
+}
+
+static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
+ void *v)
+{
+ int cpu = (long)v;
+
+ val &= ~CPU_TASKS_FROZEN;
+ switch (val) {
+ case CPU_DYING:
+ printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
+ cpu);
+ hardware_disable(NULL);
+ break;
+ case CPU_UP_CANCELED:
+ printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
+ cpu);
+ smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
+ break;
+ case CPU_ONLINE:
+ printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
+ cpu);
+ smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
+ void *v)
+{
+ if (val == SYS_RESTART) {
+ /*
+ * Some (well, at least mine) BIOSes hang on reboot if
+ * in vmx root mode.
+ */
+ printk(KERN_INFO "kvm: exiting hardware virtualization\n");
+ on_each_cpu(hardware_disable, NULL, 0, 1);
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block kvm_reboot_notifier = {
+ .notifier_call = kvm_reboot,
+ .priority = 0,
+};
+
+void kvm_io_bus_init(struct kvm_io_bus *bus)
+{
+ memset(bus, 0, sizeof(*bus));
+}
+
+void kvm_io_bus_destroy(struct kvm_io_bus *bus)
+{
+ int i;
+
+ for (i = 0; i < bus->dev_count; i++) {
+ struct kvm_io_device *pos = bus->devs[i];
+
+ kvm_iodevice_destructor(pos);
+ }
+}
+
+struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
+{
+ int i;
+
+ for (i = 0; i < bus->dev_count; i++) {
+ struct kvm_io_device *pos = bus->devs[i];
+
+ if (pos->in_range(pos, addr))
+ return pos;
+ }
+
+ return NULL;
+}
+
+void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
+{
+ BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
+
+ bus->devs[bus->dev_count++] = dev;
+}
+
+static struct notifier_block kvm_cpu_notifier = {
+ .notifier_call = kvm_cpu_hotplug,
+ .priority = 20, /* must be > scheduler priority */
+};
+
+static u64 vm_stat_get(void *_offset)
+{
+ unsigned offset = (long)_offset;
+ u64 total = 0;
+ struct kvm *kvm;
+
+ spin_lock(&kvm_lock);
+ list_for_each_entry(kvm, &vm_list, vm_list)
+ total += *(u32 *)((void *)kvm + offset);
+ spin_unlock(&kvm_lock);
+ return total;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
+
+static u64 vcpu_stat_get(void *_offset)
+{
+ unsigned offset = (long)_offset;
+ u64 total = 0;
+ struct kvm *kvm;
+ struct kvm_vcpu *vcpu;
+ int i;
+
+ spin_lock(&kvm_lock);
+ list_for_each_entry(kvm, &vm_list, vm_list)
+ for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+ vcpu = kvm->vcpus[i];
+ if (vcpu)
+ total += *(u32 *)((void *)vcpu + offset);
+ }
+ spin_unlock(&kvm_lock);
+ return total;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
+
+static struct file_operations *stat_fops[] = {
+ [KVM_STAT_VCPU] = &vcpu_stat_fops,
+ [KVM_STAT_VM] = &vm_stat_fops,
+};
+
+static void kvm_init_debug(void)
+{
+ struct kvm_stats_debugfs_item *p;
+
+ debugfs_dir = debugfs_create_dir("kvm", NULL);
+ for (p = debugfs_entries; p->name; ++p)
+ p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
+ (void *)(long)p->offset,
+ stat_fops[p->kind]);
+}
+
+static void kvm_exit_debug(void)
+{
+ struct kvm_stats_debugfs_item *p;
+
+ for (p = debugfs_entries; p->name; ++p)
+ debugfs_remove(p->dentry);
+ debugfs_remove(debugfs_dir);
+}
+
+static int kvm_suspend(struct sys_device *dev, pm_message_t state)
+{
+ hardware_disable(NULL);
+ return 0;
+}
+
+static int kvm_resume(struct sys_device *dev)
+{
+ hardware_enable(NULL);
+ return 0;
+}
+
+static struct sysdev_class kvm_sysdev_class = {
+ .name = "kvm",
+ .suspend = kvm_suspend,
+ .resume = kvm_resume,
+};
+
+static struct sys_device kvm_sysdev = {
+ .id = 0,
+ .cls = &kvm_sysdev_class,
+};
+
+struct page *bad_page;
+
+static inline
+struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
+{
+ return container_of(pn, struct kvm_vcpu, preempt_notifier);
+}
+
+static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
+{
+ struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+
+ kvm_arch_vcpu_load(vcpu, cpu);
+}
+
+static void kvm_sched_out(struct preempt_notifier *pn,
+ struct task_struct *next)
+{
+ struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+
+ kvm_arch_vcpu_put(vcpu);
+}
+
+int kvm_init(void *opaque, unsigned int vcpu_size,
+ struct module *module)
+{
+ int r;
+ int cpu;
+
+ kvm_init_debug();
+
+ r = kvm_arch_init(opaque);
+ if (r)
+ goto out_fail;
+
+ bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+
+ if (bad_page == NULL) {
+ r = -ENOMEM;
+ goto out;
+ }
+
+ r = kvm_arch_hardware_setup();
+ if (r < 0)
+ goto out_free_0;
+
+ for_each_online_cpu(cpu) {
+ smp_call_function_single(cpu,
+ kvm_arch_check_processor_compat,
+ &r, 0, 1);
+ if (r < 0)
+ goto out_free_1;
+ }
+
+ on_each_cpu(hardware_enable, NULL, 0, 1);
+ r = register_cpu_notifier(&kvm_cpu_notifier);
+ if (r)
+ goto out_free_2;
+ register_reboot_notifier(&kvm_reboot_notifier);
+
+ r = sysdev_class_register(&kvm_sysdev_class);
+ if (r)
+ goto out_free_3;
+
+ r = sysdev_register(&kvm_sysdev);
+ if (r)
+ goto out_free_4;
+
+ /* A kmem cache lets us meet the alignment requirements of fx_save. */
+ kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
+ __alignof__(struct kvm_vcpu),
+ 0, NULL);
+ if (!kvm_vcpu_cache) {
+ r = -ENOMEM;
+ goto out_free_5;
+ }
+
+ kvm_chardev_ops.owner = module;
+
+ r = misc_register(&kvm_dev);
+ if (r) {
+ printk(KERN_ERR "kvm: misc device register failed\n");
+ goto out_free;
+ }
+
+ kvm_preempt_ops.sched_in = kvm_sched_in;
+ kvm_preempt_ops.sched_out = kvm_sched_out;
+
+ return 0;
+
+out_free:
+ kmem_cache_destroy(kvm_vcpu_cache);
+out_free_5:
+ sysdev_unregister(&kvm_sysdev);
+out_free_4:
+ sysdev_class_unregister(&kvm_sysdev_class);
+out_free_3:
+ unregister_reboot_notifier(&kvm_reboot_notifier);
+ unregister_cpu_notifier(&kvm_cpu_notifier);
+out_free_2:
+ on_each_cpu(hardware_disable, NULL, 0, 1);
+out_free_1:
+ kvm_arch_hardware_unsetup();
+out_free_0:
+ __free_page(bad_page);
+out:
+ kvm_arch_exit();
+ kvm_exit_debug();
+out_fail:
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_init);
+
+void kvm_exit(void)
+{
+ misc_deregister(&kvm_dev);
+ kmem_cache_destroy(kvm_vcpu_cache);
+ sysdev_unregister(&kvm_sysdev);
+ sysdev_class_unregister(&kvm_sysdev_class);
+ unregister_reboot_notifier(&kvm_reboot_notifier);
+ unregister_cpu_notifier(&kvm_cpu_notifier);
+ on_each_cpu(hardware_disable, NULL, 0, 1);
+ kvm_arch_hardware_unsetup();
+ kvm_arch_exit();
+ kvm_exit_debug();
+ __free_page(bad_page);
+}
+EXPORT_SYMBOL_GPL(kvm_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 20:33:28 +0000