diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2022-03-30 21:14:18 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2022-03-30 21:14:18 -0700 |
| commit | 5710faba8a2a15349c9001bd4b2cd958e56c90fa (patch) | |
| tree | 80694ac211cac1b2347c3c905b38d86139dc51c1 /drivers/vhost/iotlb.c | |
| parent | 5600f6986628dde8881734090588474f54a540a8 (diff) | |
| parent | a949087c2285c8de4f0f204cab2d4eece9d929a2 (diff) | |
Merge branch 'next' into for-linus
Prepare input updates for 5.18 merge window.
Diffstat (limited to 'drivers/vhost/iotlb.c')
| -rw-r--r-- | drivers/vhost/iotlb.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c index 670d56c879e5..40b098320b2a 100644 --- a/drivers/vhost/iotlb.c +++ b/drivers/vhost/iotlb.c @@ -57,6 +57,17 @@ int vhost_iotlb_add_range_ctx(struct vhost_iotlb *iotlb, if (last < start) return -EFAULT; + /* If the range being mapped is [0, ULONG_MAX], split it into two entries + * otherwise its size would overflow u64. + */ + if (start == 0 && last == ULONG_MAX) { + u64 mid = last / 2; + + vhost_iotlb_add_range_ctx(iotlb, start, mid, addr, perm, opaque); + addr += mid + 1; + start = mid + 1; + } + if (iotlb->limit && iotlb->nmaps == iotlb->limit && iotlb->flags & VHOST_IOTLB_FLAG_RETIRE) { |