diff options
| author | Sasha Levin <sasha.levin@oracle.com> | 2013-07-07 12:00:27 -0400 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-06-01 16:39:54 +0100 |
| commit | e7e2950aa6ab3467e15ef7506793a0e582f5c667 (patch) | |
| tree | ed6448ee922b0814f611b0eee985158277f6eae6 /include | |
| parent | e2b9812560762229a3d038d2eb83421ccded9e22 (diff) | |
| download | kvmtool-e7e2950aa6ab3467e15ef7506793a0e582f5c667.tar.gz | |
kvm tools: fix boot of guests with more than 4gb of ram
Commit "kvm tools: virtio: remove hardcoded assumptions
about guest page size" has introduced a bug that prevented
guests with more than 4gb of ram from booting.
The issue is that 'pfn' is a 32bit integer, so when multiplying
it by page size to get the actual page will cause an overflow if
the pfn referred to a memory area above 4gb.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/kvm/virtio.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/kvm/virtio.h b/include/kvm/virtio.h index 269ea4a9..820b94a4 100644 --- a/include/kvm/virtio.h +++ b/include/kvm/virtio.h @@ -90,4 +90,10 @@ int virtio_init(struct kvm *kvm, void *dev, struct virtio_device *vdev, struct virtio_ops *ops, enum virtio_trans trans, int device_id, int subsys_id, int class); int virtio_compat_add_message(const char *device, const char *config); + +static inline void *virtio_get_vq(struct kvm *kvm, u32 pfn, u32 page_size) +{ + return guest_flat_to_host(kvm, (u64)pfn * page_size); +} + #endif /* KVM__VIRTIO_H */ |