static bool largepages_enabled = true;
+struct page *bad_page;
+static pfn_t bad_pfn;
+
static struct page *hwpoison_page;
static pfn_t hwpoison_pfn;
-struct page *fault_page;
-pfn_t fault_pfn;
+static struct page *fault_page;
+static pfn_t fault_pfn;
inline int kvm_is_mmio_pfn(pfn_t pfn)
{
}
vcpu->run = page_address(page);
+ kvm_vcpu_set_in_spin_loop(vcpu, false);
+ kvm_vcpu_set_dy_eligible(vcpu, false);
+
r = kvm_arch_vcpu_init(vcpu);
if (r < 0)
goto fail_free_run;
* count is also read inside the mmu_lock critical section.
*/
kvm->mmu_notifier_count++;
- for (; start < end; start += PAGE_SIZE)
- need_tlb_flush |= kvm_unmap_hva(kvm, start);
+ need_tlb_flush = kvm_unmap_hva_range(kvm, start, end);
need_tlb_flush |= kvm->tlbs_dirty;
/* we've to flush the tlb before the pages can be freed */
if (need_tlb_flush)
return ERR_PTR(r);
}
+/*
+ * Avoid using vmalloc for a small buffer.
+ * Should not be used when the size is statically known.
+ */
+void *kvm_kvzalloc(unsigned long size)
+{
+ if (size > PAGE_SIZE)
+ return vzalloc(size);
+ else
+ return kzalloc(size, GFP_KERNEL);
+}
+
+void kvm_kvfree(const void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ vfree(addr);
+ else
+ kfree(addr);
+}
+
static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
{
if (!memslot->dirty_bitmap)
return;
- if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE)
- vfree(memslot->dirty_bitmap_head);
- else
- kfree(memslot->dirty_bitmap_head);
-
+ kvm_kvfree(memslot->dirty_bitmap);
memslot->dirty_bitmap = NULL;
- memslot->dirty_bitmap_head = NULL;
}
/*
/*
* Allocation size is twice as large as the actual dirty bitmap size.
- * This makes it possible to do double buffering: see x86's
- * kvm_vm_ioctl_get_dirty_log().
+ * See x86's kvm_vm_ioctl_get_dirty_log() why this is needed.
*/
static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
{
#ifndef CONFIG_S390
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
- if (dirty_bytes > PAGE_SIZE)
- memslot->dirty_bitmap = vzalloc(dirty_bytes);
- else
- memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL);
-
+ memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes);
if (!memslot->dirty_bitmap)
return -ENOMEM;
- memslot->dirty_bitmap_head = memslot->dirty_bitmap;
- memslot->nr_dirty_pages = 0;
#endif /* !CONFIG_S390 */
return 0;
}
}
EXPORT_SYMBOL_GPL(is_hwpoison_pfn);
-int is_fault_pfn(pfn_t pfn)
-{
- return pfn == fault_pfn;
-}
-EXPORT_SYMBOL_GPL(is_fault_pfn);
-
int is_noslot_pfn(pfn_t pfn)
{
return pfn == bad_pfn;
}
EXPORT_SYMBOL_GPL(gfn_to_hva);
-static pfn_t get_fault_pfn(void)
+pfn_t get_fault_pfn(void)
{
get_page(fault_page);
return fault_pfn;
}
+EXPORT_SYMBOL_GPL(get_fault_pfn);
int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, int write, struct page **page)
return rc == -EHWPOISON;
}
-static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic,
- bool *async, bool write_fault, bool *writable)
+static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
+ bool write_fault, bool *writable)
{
struct page *page[1];
int npages = 0;
return pfn;
}
-pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr)
+pfn_t hva_to_pfn_atomic(unsigned long addr)
{
- return hva_to_pfn(kvm, addr, true, NULL, true, NULL);
+ return hva_to_pfn(addr, true, NULL, true, NULL);
}
EXPORT_SYMBOL_GPL(hva_to_pfn_atomic);
return page_to_pfn(bad_page);
}
- return hva_to_pfn(kvm, addr, atomic, async, write_fault, writable);
+ return hva_to_pfn(addr, atomic, async, write_fault, writable);
}
pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn)
}
EXPORT_SYMBOL_GPL(gfn_to_pfn_prot);
-pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
- struct kvm_memory_slot *slot, gfn_t gfn)
+pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
{
unsigned long addr = gfn_to_hva_memslot(slot, gfn);
- return hva_to_pfn(kvm, addr, false, NULL, true, NULL);
+ return hva_to_pfn(addr, false, NULL, true, NULL);
}
int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
if (memslot && memslot->dirty_bitmap) {
unsigned long rel_gfn = gfn - memslot->base_gfn;
- if (!test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap))
- memslot->nr_dirty_pages++;
+ /* TODO: introduce set_bit_le() and use it */
+ test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap);
}
}
finish_wait(&vcpu->wq, &wait);
}
+#ifndef CONFIG_S390
+/*
+ * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode.
+ */
+void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
+{
+ int me;
+ int cpu = vcpu->cpu;
+ wait_queue_head_t *wqp;
+
+ wqp = kvm_arch_vcpu_wq(vcpu);
+ if (waitqueue_active(wqp)) {
+ wake_up_interruptible(wqp);
+ ++vcpu->stat.halt_wakeup;
+ }
+
+ me = get_cpu();
+ if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu))
+ if (kvm_arch_vcpu_should_kick(vcpu))
+ smp_send_reschedule(cpu);
+ put_cpu();
+}
+#endif /* !CONFIG_S390 */
+
void kvm_resched(struct kvm_vcpu *vcpu)
{
if (!need_resched())
}
EXPORT_SYMBOL_GPL(kvm_resched);
+bool kvm_vcpu_yield_to(struct kvm_vcpu *target)
+{
+ struct pid *pid;
+ struct task_struct *task = NULL;
+
+ rcu_read_lock();
+ pid = rcu_dereference(target->pid);
+ if (pid)
+ task = get_pid_task(target->pid, PIDTYPE_PID);
+ rcu_read_unlock();
+ if (!task)
+ return false;
+ if (task->flags & PF_VCPU) {
+ put_task_struct(task);
+ return false;
+ }
+ if (yield_to(task, 1)) {
+ put_task_struct(task);
+ return true;
+ }
+ put_task_struct(task);
+ return false;
+}
+EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to);
+
void kvm_vcpu_on_spin(struct kvm_vcpu *me)
{
struct kvm *kvm = me->kvm;
int pass;
int i;
+ kvm_vcpu_set_in_spin_loop(me, true);
/*
* We boost the priority of a VCPU that is runnable but not
* currently running, because it got preempted by something
*/
for (pass = 0; pass < 2 && !yielded; pass++) {
kvm_for_each_vcpu(i, vcpu, kvm) {
- struct task_struct *task = NULL;
- struct pid *pid;
- if (!pass && i < last_boosted_vcpu) {
+ if (!pass && i <= last_boosted_vcpu) {
i = last_boosted_vcpu;
continue;
} else if (pass && i > last_boosted_vcpu)
continue;
if (waitqueue_active(&vcpu->wq))
continue;
- rcu_read_lock();
- pid = rcu_dereference(vcpu->pid);
- if (pid)
- task = get_pid_task(vcpu->pid, PIDTYPE_PID);
- rcu_read_unlock();
- if (!task)
- continue;
- if (task->flags & PF_VCPU) {
- put_task_struct(task);
- continue;
- }
- if (yield_to(task, 1)) {
- put_task_struct(task);
+ if (kvm_vcpu_yield_to(vcpu)) {
kvm->last_boosted_vcpu = i;
yielded = 1;
break;
}
- put_task_struct(task);
}
}
+ kvm_vcpu_set_in_spin_loop(me, false);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin);
mutex_unlock(&kvm->lock);
break;
#endif
+#ifdef CONFIG_HAVE_KVM_MSI
+ case KVM_SIGNAL_MSI: {
+ struct kvm_msi msi;
+
+ r = -EFAULT;
+ if (copy_from_user(&msi, argp, sizeof msi))
+ goto out;
+ r = kvm_send_userspace_msi(kvm, &msi);
+ break;
+ }
+#endif
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
if (r == -ENOTTY)
case KVM_CAP_SET_BOOT_CPU_ID:
#endif
case KVM_CAP_INTERNAL_ERROR_DATA:
+#ifdef CONFIG_HAVE_KVM_MSI
+ case KVM_CAP_SIGNAL_MSI:
+#endif
return 1;
-#ifdef CONFIG_HAVE_KVM_IRQCHIP
+#ifdef KVM_CAP_IRQ_ROUTING
case KVM_CAP_IRQ_ROUTING:
return KVM_MAX_IRQ_ROUTES;
#endif
int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev,
gpa_t addr, int len)
{
- if (bus->dev_count == NR_IOBUS_DEVS)
- return -ENOSPC;
-
bus->range[bus->dev_count++] = (struct kvm_io_range) {
.addr = addr,
.len = len,
struct kvm_io_bus *new_bus, *bus;
bus = kvm->buses[bus_idx];
- if (bus->dev_count > NR_IOBUS_DEVS-1)
+ if (bus->dev_count > NR_IOBUS_DEVS - 1)
return -ENOSPC;
- new_bus = kmemdup(bus, sizeof(struct kvm_io_bus), GFP_KERNEL);
+ new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) *
+ sizeof(struct kvm_io_range)), GFP_KERNEL);
if (!new_bus)
return -ENOMEM;
+ memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count *
+ sizeof(struct kvm_io_range)));
kvm_io_bus_insert_dev(new_bus, dev, addr, len);
rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
synchronize_srcu_expedited(&kvm->srcu);
struct kvm_io_bus *new_bus, *bus;
bus = kvm->buses[bus_idx];
-
- new_bus = kmemdup(bus, sizeof(*bus), GFP_KERNEL);
- if (!new_bus)
- return -ENOMEM;
-
r = -ENOENT;
- for (i = 0; i < new_bus->dev_count; i++)
- if (new_bus->range[i].dev == dev) {
+ for (i = 0; i < bus->dev_count; i++)
+ if (bus->range[i].dev == dev) {
r = 0;
- new_bus->dev_count--;
- new_bus->range[i] = new_bus->range[new_bus->dev_count];
- sort(new_bus->range, new_bus->dev_count,
- sizeof(struct kvm_io_range),
- kvm_io_bus_sort_cmp, NULL);
break;
}
- if (r) {
- kfree(new_bus);
+ if (r)
return r;
- }
+
+ new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count - 1) *
+ sizeof(struct kvm_io_range)), GFP_KERNEL);
+ if (!new_bus)
+ return -ENOMEM;
+
+ memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range));
+ new_bus->dev_count--;
+ memcpy(new_bus->range + i, bus->range + i + 1,
+ (new_bus->dev_count - i) * sizeof(struct kvm_io_range));
rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
synchronize_srcu_expedited(&kvm->srcu);
.resume = kvm_resume,
};
-struct page *bad_page;
-pfn_t bad_pfn;
-
static inline
struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
{
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff