diff options
| author | Matthew Rosato <mjrosato@linux.ibm.com> | 2022-06-06 23:33:10 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@linux.ibm.com> | 2022-07-11 10:54:15 +0300 |
| commit | 932b646727f9df312980d175e339248cdf7812f0 (patch) | |
| tree | 4c76c26e938597df4d219bc9f9f3c5e625c962c2 /drivers/s390/virtio | |
| parent | d2197485a1883c60d044146b1ee69aac654c55e8 (diff) | |
| download | linux-932b646727f9df312980d175e339248cdf7812f0.tar.xz | |
s390/airq: allow for airq structure that uses an input vector
When doing device passthrough where interrupts are being forwarded from
host to guest, we wish to use a pinned section of guest memory as the
vector (the same memory used by the guest as the vector). To accomplish
this, add a new parameter for airq_iv_create which allows passing an
existing vector to be used instead of allocating a new one. The caller
is responsible for ensuring the vector is pinned in memory as well as for
unpinning the memory when the vector is no longer needed.
A subsequent patch will use this new parameter for zPCI interpretation.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220606203325.110625-7-mjrosato@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Diffstat (limited to 'drivers/s390/virtio')
| -rw-r--r-- | drivers/s390/virtio/virtio_ccw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index 58cca50996ee..51bef226d33f 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -242,7 +242,7 @@ static struct airq_info *new_airq_info(int index) return NULL; rwlock_init(&info->lock); info->aiv = airq_iv_create(VIRTIO_IV_BITS, AIRQ_IV_ALLOC | AIRQ_IV_PTR - | AIRQ_IV_CACHELINE); + | AIRQ_IV_CACHELINE, NULL); if (!info->aiv) { kfree(info); return NULL; |