diff options
author | Avi Kivity <avi@qumranet.com> | 2007-12-16 11:13:16 +0200 |
---|---|---|
committer | Avi Kivity <avi@qumranet.com> | 2008-01-30 18:01:18 +0200 |
commit | 0fce5623ba248d3af0d7fb719d5ac367cc9d5192 (patch) | |
tree | b31021dcec46616c2c4f997b2d05d4879619d7e2 /drivers/kvm | |
parent | edf884172e9828c6234b254208af04655855038d (diff) | |
download | kernel_samsung_smdk4412-0fce5623ba248d3af0d7fb719d5ac367cc9d5192.zip kernel_samsung_smdk4412-0fce5623ba248d3af0d7fb719d5ac367cc9d5192.tar.gz kernel_samsung_smdk4412-0fce5623ba248d3af0d7fb719d5ac367cc9d5192.tar.bz2 |
KVM: Move drivers/kvm/* to virt/kvm/
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm')
-rw-r--r-- | drivers/kvm/iodev.h | 63 | ||||
-rw-r--r-- | drivers/kvm/kvm_main.c | 1393 |
2 files changed, 0 insertions, 1456 deletions
diff --git a/drivers/kvm/iodev.h b/drivers/kvm/iodev.h deleted file mode 100644 index c14e642..0000000 --- a/drivers/kvm/iodev.h +++ /dev/null @@ -1,63 +0,0 @@ -/* - * 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/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c deleted file mode 100644 index 4026d7d..0000000 --- a/drivers/kvm/kvm_main.c +++ /dev/null @@ -1,1393 +0,0 @@ -/* - * 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); - 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 kvm->lock. - */ -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; - - mutex_lock(&kvm->lock); - r = __kvm_set_memory_region(kvm, mem, user_alloc); - mutex_unlock(&kvm->lock); - 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 - */ -static 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]; -} - -struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) -{ - struct page *page; - - down_read(¤t->mm->mmap_sem); - page = __gfn_to_page(kvm, gfn); - up_read(¤t->mm->mmap_sem); - - return page; -} - -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_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; - /* current->mm->mmap_sem is already held so call lockless version */ - 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); |