* [Qemu-devel] [PATCH 0/1] virtio: feature bit fixup
@ 2014-12-12 9:01 Cornelia Huck
2014-12-12 9:01 ` [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks Cornelia Huck
0 siblings, 1 reply; 7+ messages in thread
From: Cornelia Huck @ 2014-12-12 9:01 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: Cornelia Huck, Thomas Huth, qemu-devel
When reviewing my feature bit changes for 1.0, Thomas noticed that I
accidentally fixed a bug :) There are two further places with the same
problem that Thomas noticed as well.
I wonder why we didn't see problems before...
Cornelia Huck (1):
virtio: fix feature bit checks
hw/scsi/virtio-scsi.c | 2 +-
hw/virtio/dataplane/vring.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
--
1.8.5.5
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2014-12-12 9:01 [Qemu-devel] [PATCH 0/1] virtio: feature bit fixup Cornelia Huck
@ 2014-12-12 9:01 ` Cornelia Huck
2014-12-12 9:08 ` Michael S. Tsirkin
2015-01-21 12:07 ` Thomas Huth
0 siblings, 2 replies; 7+ messages in thread
From: Cornelia Huck @ 2014-12-12 9:01 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: Cornelia Huck, Thomas Huth, qemu-devel
Several places check against the feature bit number instead of against
the feature bit. Fix them.
Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
hw/scsi/virtio-scsi.c | 2 +-
hw/virtio/dataplane/vring.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index ef48550..a44c410 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -144,7 +144,7 @@ static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
*
* TODO: always disable this workaround for virtio 1.0 devices.
*/
- if ((vdev->guest_features & VIRTIO_F_ANY_LAYOUT) == 0) {
+ if ((vdev->guest_features & (1 << VIRTIO_F_ANY_LAYOUT)) == 0) {
req_size = req->elem.out_sg[0].iov_len;
resp_size = req->elem.in_sg[0].iov_len;
}
diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c
index 61f6d83..78c6f45 100644
--- a/hw/virtio/dataplane/vring.c
+++ b/hw/virtio/dataplane/vring.c
@@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
* interrupts. */
smp_mb();
- if ((vdev->guest_features & VIRTIO_F_NOTIFY_ON_EMPTY) &&
+ if ((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) &&
unlikely(vring->vr.avail->idx == vring->last_avail_idx)) {
return true;
}
- if (!(vdev->guest_features & VIRTIO_RING_F_EVENT_IDX)) {
+ if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
return !(vring->vr.avail->flags & VRING_AVAIL_F_NO_INTERRUPT);
}
old = vring->signalled_used;
--
1.8.5.5
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2014-12-12 9:01 ` [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks Cornelia Huck
@ 2014-12-12 9:08 ` Michael S. Tsirkin
2014-12-12 9:13 ` Cornelia Huck
2015-01-21 12:07 ` Thomas Huth
1 sibling, 1 reply; 7+ messages in thread
From: Michael S. Tsirkin @ 2014-12-12 9:08 UTC (permalink / raw)
To: Cornelia Huck; +Cc: Thomas Huth, qemu-devel
On Fri, Dec 12, 2014 at 10:01:46AM +0100, Cornelia Huck wrote:
> Several places check against the feature bit number instead of against
> the feature bit. Fix them.
>
> Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: stable?
> ---
> hw/scsi/virtio-scsi.c | 2 +-
> hw/virtio/dataplane/vring.c | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
> index ef48550..a44c410 100644
> --- a/hw/scsi/virtio-scsi.c
> +++ b/hw/scsi/virtio-scsi.c
> @@ -144,7 +144,7 @@ static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
> *
> * TODO: always disable this workaround for virtio 1.0 devices.
> */
> - if ((vdev->guest_features & VIRTIO_F_ANY_LAYOUT) == 0) {
> + if ((vdev->guest_features & (1 << VIRTIO_F_ANY_LAYOUT)) == 0) {
> req_size = req->elem.out_sg[0].iov_len;
> resp_size = req->elem.in_sg[0].iov_len;
> }
> diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c
> index 61f6d83..78c6f45 100644
> --- a/hw/virtio/dataplane/vring.c
> +++ b/hw/virtio/dataplane/vring.c
> @@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
> * interrupts. */
> smp_mb();
>
> - if ((vdev->guest_features & VIRTIO_F_NOTIFY_ON_EMPTY) &&
> + if ((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) &&
> unlikely(vring->vr.avail->idx == vring->last_avail_idx)) {
> return true;
> }
>
> - if (!(vdev->guest_features & VIRTIO_RING_F_EVENT_IDX)) {
> + if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
> return !(vring->vr.avail->flags & VRING_AVAIL_F_NO_INTERRUPT);
> }
> old = vring->signalled_used;
> --
> 1.8.5.5
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2014-12-12 9:08 ` Michael S. Tsirkin
@ 2014-12-12 9:13 ` Cornelia Huck
2014-12-15 4:44 ` Fam Zheng
0 siblings, 1 reply; 7+ messages in thread
From: Cornelia Huck @ 2014-12-12 9:13 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: Thomas Huth, qemu-devel
On Fri, 12 Dec 2014 11:08:21 +0200
"Michael S. Tsirkin" <mst@redhat.com> wrote:
> On Fri, Dec 12, 2014 at 10:01:46AM +0100, Cornelia Huck wrote:
> > Several places check against the feature bit number instead of against
> > the feature bit. Fix them.
> >
> > Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> > Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
>
> Cc: stable?
Hm, yeah. Can you add it?
>
> > ---
> > hw/scsi/virtio-scsi.c | 2 +-
> > hw/virtio/dataplane/vring.c | 4 ++--
> > 2 files changed, 3 insertions(+), 3 deletions(-)
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2014-12-12 9:13 ` Cornelia Huck
@ 2014-12-15 4:44 ` Fam Zheng
0 siblings, 0 replies; 7+ messages in thread
From: Fam Zheng @ 2014-12-15 4:44 UTC (permalink / raw)
To: Cornelia Huck; +Cc: qemu-devel, qemu-stable, Thomas Huth, Michael S. Tsirkin
On Fri, 12/12 10:13, Cornelia Huck wrote:
> On Fri, 12 Dec 2014 11:08:21 +0200
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
>
> > On Fri, Dec 12, 2014 at 10:01:46AM +0100, Cornelia Huck wrote:
> > > Several places check against the feature bit number instead of against
> > > the feature bit. Fix them.
> > >
> > > Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> > > Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> >
> > Cc: stable?
>
> Hm, yeah. Can you add it?
Ccing qemu-stable@nongnu.org
Fam
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2014-12-12 9:01 ` [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks Cornelia Huck
2014-12-12 9:08 ` Michael S. Tsirkin
@ 2015-01-21 12:07 ` Thomas Huth
2015-01-21 14:05 ` Michael S. Tsirkin
1 sibling, 1 reply; 7+ messages in thread
From: Thomas Huth @ 2015-01-21 12:07 UTC (permalink / raw)
To: Cornelia Huck; +Cc: qemu-stable, qemu-devel, Michael S. Tsirkin
On Fri, 12 Dec 2014 10:01:46 +0100
Cornelia Huck <cornelia.huck@de.ibm.com> wrote:
> Several places check against the feature bit number instead of against
> the feature bit. Fix them.
>
> Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> ---
> hw/scsi/virtio-scsi.c | 2 +-
> hw/virtio/dataplane/vring.c | 4 ++--
> 2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
> index ef48550..a44c410 100644
> --- a/hw/scsi/virtio-scsi.c
> +++ b/hw/scsi/virtio-scsi.c
> @@ -144,7 +144,7 @@ static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
> *
> * TODO: always disable this workaround for virtio 1.0 devices.
> */
> - if ((vdev->guest_features & VIRTIO_F_ANY_LAYOUT) == 0) {
> + if ((vdev->guest_features & (1 << VIRTIO_F_ANY_LAYOUT)) == 0) {
> req_size = req->elem.out_sg[0].iov_len;
> resp_size = req->elem.in_sg[0].iov_len;
> }
> diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c
> index 61f6d83..78c6f45 100644
> --- a/hw/virtio/dataplane/vring.c
> +++ b/hw/virtio/dataplane/vring.c
> @@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
> * interrupts. */
> smp_mb();
>
> - if ((vdev->guest_features & VIRTIO_F_NOTIFY_ON_EMPTY) &&
> + if ((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) &&
> unlikely(vring->vr.avail->idx == vring->last_avail_idx)) {
> return true;
> }
>
> - if (!(vdev->guest_features & VIRTIO_RING_F_EVENT_IDX)) {
> + if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
> return !(vring->vr.avail->flags & VRING_AVAIL_F_NO_INTERRUPT);
> }
> old = vring->signalled_used;
Ping ... somebody taking care of this? It's a bug fix for current
code, so IMHO this patch should not wait for the inclusion of the
other virtio-1 stuff...
Thomas
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks
2015-01-21 12:07 ` Thomas Huth
@ 2015-01-21 14:05 ` Michael S. Tsirkin
0 siblings, 0 replies; 7+ messages in thread
From: Michael S. Tsirkin @ 2015-01-21 14:05 UTC (permalink / raw)
To: Thomas Huth; +Cc: Cornelia Huck, qemu-devel, qemu-stable
On Wed, Jan 21, 2015 at 01:07:59PM +0100, Thomas Huth wrote:
> On Fri, 12 Dec 2014 10:01:46 +0100
> Cornelia Huck <cornelia.huck@de.ibm.com> wrote:
>
> > Several places check against the feature bit number instead of against
> > the feature bit. Fix them.
> >
> > Reported-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> > Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> > ---
> > hw/scsi/virtio-scsi.c | 2 +-
> > hw/virtio/dataplane/vring.c | 4 ++--
> > 2 files changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
> > index ef48550..a44c410 100644
> > --- a/hw/scsi/virtio-scsi.c
> > +++ b/hw/scsi/virtio-scsi.c
> > @@ -144,7 +144,7 @@ static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
> > *
> > * TODO: always disable this workaround for virtio 1.0 devices.
> > */
> > - if ((vdev->guest_features & VIRTIO_F_ANY_LAYOUT) == 0) {
> > + if ((vdev->guest_features & (1 << VIRTIO_F_ANY_LAYOUT)) == 0) {
> > req_size = req->elem.out_sg[0].iov_len;
> > resp_size = req->elem.in_sg[0].iov_len;
> > }
> > diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c
> > index 61f6d83..78c6f45 100644
> > --- a/hw/virtio/dataplane/vring.c
> > +++ b/hw/virtio/dataplane/vring.c
> > @@ -133,12 +133,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring)
> > * interrupts. */
> > smp_mb();
> >
> > - if ((vdev->guest_features & VIRTIO_F_NOTIFY_ON_EMPTY) &&
> > + if ((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) &&
> > unlikely(vring->vr.avail->idx == vring->last_avail_idx)) {
> > return true;
> > }
> >
> > - if (!(vdev->guest_features & VIRTIO_RING_F_EVENT_IDX)) {
> > + if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) {
> > return !(vring->vr.avail->flags & VRING_AVAIL_F_NO_INTERRUPT);
> > }
> > old = vring->signalled_used;
>
> Ping ... somebody taking care of this? It's a bug fix for current
> code, so IMHO this patch should not wait for the inclusion of the
> other virtio-1 stuff...
>
> Thomas
It's in my queue.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-01-21 14:06 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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2014-12-12 9:01 [Qemu-devel] [PATCH 0/1] virtio: feature bit fixup Cornelia Huck
2014-12-12 9:01 ` [Qemu-devel] [PATCH 1/1] virtio: fix feature bit checks Cornelia Huck
2014-12-12 9:08 ` Michael S. Tsirkin
2014-12-12 9:13 ` Cornelia Huck
2014-12-15 4:44 ` Fam Zheng
2015-01-21 12:07 ` Thomas Huth
2015-01-21 14:05 ` Michael S. Tsirkin
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