diff options
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 32fbf8006969..4da308ef8f9d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -553,7 +553,9 @@ int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, addr = gfn_to_hva(kvm, gfn); if (kvm_is_error_hva(addr)) return -EFAULT; + pagefault_disable(); r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); + pagefault_enable(); if (r) return -EFAULT; return 0; @@ -677,8 +679,10 @@ static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) if (vmf->pgoff == 0) page = virt_to_page(vcpu->run); +#ifdef CONFIG_X86 else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) page = virt_to_page(vcpu->arch.pio_data); +#endif else return VM_FAULT_SIGBUS; get_page(page); @@ -704,7 +708,7 @@ static int kvm_vcpu_release(struct inode *inode, struct file *filp) return 0; } -static struct file_operations kvm_vcpu_fops = { +static const struct file_operations kvm_vcpu_fops = { .release = kvm_vcpu_release, .unlocked_ioctl = kvm_vcpu_ioctl, .compat_ioctl = kvm_vcpu_ioctl, @@ -1004,7 +1008,7 @@ static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) return 0; } -static struct file_operations kvm_vm_fops = { +static const struct file_operations kvm_vm_fops = { .release = kvm_vm_release, .unlocked_ioctl = kvm_vm_ioctl, .compat_ioctl = kvm_vm_ioctl, @@ -1058,7 +1062,10 @@ static long kvm_dev_ioctl(struct file *filp, r = -EINVAL; if (arg) goto out; - r = 2 * PAGE_SIZE; + r = PAGE_SIZE; /* struct kvm_run */ +#ifdef CONFIG_X86 + r += PAGE_SIZE; /* pio data page */ +#endif break; default: return kvm_arch_dev_ioctl(filp, ioctl, arg); |