diff options
Diffstat (limited to 'virt/kvm/guest_memfd.c')
| -rw-r--r-- | virt/kvm/guest_memfd.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 69c9d6d546b2..3694d5405a5e 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -640,15 +640,16 @@ int kvm_gmem_create(struct kvm *kvm, struct kvm_create_guest_memfd *args) } int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, - unsigned int fd, loff_t offset) + unsigned int fd, uoff_t offset) { - loff_t size = slot->npages << PAGE_SHIFT; + uoff_t size = slot->npages << PAGE_SHIFT; unsigned long start, end; struct gmem_file *f; struct inode *inode; struct file *file; int r = -EINVAL; + BUILD_BUG_ON(sizeof(gpa_t) != sizeof(offset)); BUILD_BUG_ON(sizeof(gfn_t) != sizeof(slot->gmem.pgoff)); file = fget(fd); @@ -664,8 +665,7 @@ int kvm_gmem_bind(struct kvm *kvm, struct kvm_memory_slot *slot, inode = file_inode(file); - if (offset < 0 || !PAGE_ALIGNED(offset) || - offset + size > i_size_read(inode)) + if (!PAGE_ALIGNED(offset) || offset + size > i_size_read(inode)) goto err; filemap_invalidate_lock(inode->i_mapping); @@ -858,7 +858,8 @@ out_unlock: return ret; } -long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long npages, +long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, + long npages, bool may_writeback_src, kvm_gmem_populate_cb post_populate, void *opaque) { struct kvm_memory_slot *slot; @@ -892,8 +893,9 @@ long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long if (src) { unsigned long uaddr = (unsigned long)src + i * PAGE_SIZE; + unsigned int flags = may_writeback_src ? FOLL_WRITE : 0; - ret = get_user_pages_fast(uaddr, 1, 0, &src_page); + ret = get_user_pages_fast(uaddr, 1, flags, &src_page); if (ret < 0) break; if (ret != 1) { |