* [PATCH] virtio: remove unnecessary host_features in ->get_features()
@ 2022-08-02 13:24 Stefan Hajnoczi
0 siblings, 0 replies; 3+ messages in thread
From: Stefan Hajnoczi @ 2022-08-02 13:24 UTC (permalink / raw)
To: qemu-devel
Cc: Laurent Vivier, Marc-André Lureau, Fam Zheng, Kevin Wolf,
qemu-block, Amit Shah, Michael S. Tsirkin, Jason Wang,
Paolo Bonzini, Stefan Hajnoczi, David Hildenbrand, Hanna Reitz,
Cornelia Huck
Since at least commit 6b8f1020540c27246277377aa2c3331ad2bfb160 ("virtio:
move host_features") the ->get_features() function has been called with
host_features as an argument.
Some devices manually add host_features in ->get_features() although the
features argument already contains host_features. Make all devices
consistent by dropping the unnecessary code.
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/block/virtio-blk.c | 3 ---
hw/char/virtio-serial-bus.c | 1 -
hw/net/virtio-net.c | 3 ---
hw/scsi/vhost-scsi-common.c | 3 ---
hw/scsi/virtio-scsi.c | 4 ----
hw/virtio/virtio-balloon.c | 2 --
6 files changed, 16 deletions(-)
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index e9ba752f6b..429aedcf2b 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -996,9 +996,6 @@ static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features,
{
VirtIOBlock *s = VIRTIO_BLK(vdev);
- /* Firstly sync all virtio-blk possible supported features */
- features |= s->host_features;
-
virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX);
virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY);
virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY);
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index 7d4601cb5d..1414fb85ae 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -557,7 +557,6 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t features,
vser = VIRTIO_SERIAL(vdev);
- features |= vser->host_features;
if (vser->bus.max_nr_ports > 1) {
virtio_add_feature(&features, VIRTIO_CONSOLE_F_MULTIPORT);
}
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index dd0d056fde..8ecdc1cd83 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -715,9 +715,6 @@ static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_queue(n->nic);
- /* Firstly sync all virtio-net possible supported features */
- features |= n->host_features;
-
virtio_add_feature(&features, VIRTIO_NET_F_MAC);
if (!peer_has_vnet_hdr(n)) {
diff --git a/hw/scsi/vhost-scsi-common.c b/hw/scsi/vhost-scsi-common.c
index 767f827e55..8b26f90aa1 100644
--- a/hw/scsi/vhost-scsi-common.c
+++ b/hw/scsi/vhost-scsi-common.c
@@ -124,9 +124,6 @@ uint64_t vhost_scsi_common_get_features(VirtIODevice *vdev, uint64_t features,
{
VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
- /* Turn on predefined features supported by this device */
- features |= vsc->host_features;
-
return vhost_get_features(&vsc->dev, vsc->feature_bits, features);
}
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 4141dddd51..f754611dfe 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -816,10 +816,6 @@ static uint64_t virtio_scsi_get_features(VirtIODevice *vdev,
uint64_t requested_features,
Error **errp)
{
- VirtIOSCSI *s = VIRTIO_SCSI(vdev);
-
- /* Firstly sync all virtio-scsi possible supported features */
- requested_features |= s->host_features;
return requested_features;
}
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 73ac5eb675..0e9ca71b15 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -796,8 +796,6 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
static uint64_t virtio_balloon_get_features(VirtIODevice *vdev, uint64_t f,
Error **errp)
{
- VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
- f |= dev->host_features;
virtio_add_feature(&f, VIRTIO_BALLOON_F_STATS_VQ);
return f;
--
2.37.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] virtio: remove unnecessary host_features in ->get_features()
@ 2022-08-02 13:28 Stefan Hajnoczi
2022-08-02 15:31 ` Cornelia Huck
0 siblings, 1 reply; 3+ messages in thread
From: Stefan Hajnoczi @ 2022-08-02 13:28 UTC (permalink / raw)
To: qemu-devel
Cc: Michael S. Tsirkin, Jason Wang, Paolo Bonzini, Laurent Vivier,
Hanna Reitz, Stefan Hajnoczi, qemu-block, David Hildenbrand,
Marc-André Lureau, Kevin Wolf, Fam Zheng, Amit Shah,
Cornelia Huck
Since at least commit 6b8f1020540c27246277377aa2c3331ad2bfb160 ("virtio:
move host_features") the ->get_features() function has been called with
host_features as an argument.
Some devices manually add host_features in ->get_features() although the
features argument already contains host_features. Make all devices
consistent by dropping the unnecessary code.
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
hw/block/virtio-blk.c | 3 ---
hw/char/virtio-serial-bus.c | 1 -
hw/net/virtio-net.c | 3 ---
hw/scsi/vhost-scsi-common.c | 3 ---
hw/scsi/virtio-scsi.c | 4 ----
hw/virtio/virtio-balloon.c | 2 --
6 files changed, 16 deletions(-)
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index e9ba752f6b..429aedcf2b 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -996,9 +996,6 @@ static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features,
{
VirtIOBlock *s = VIRTIO_BLK(vdev);
- /* Firstly sync all virtio-blk possible supported features */
- features |= s->host_features;
-
virtio_add_feature(&features, VIRTIO_BLK_F_SEG_MAX);
virtio_add_feature(&features, VIRTIO_BLK_F_GEOMETRY);
virtio_add_feature(&features, VIRTIO_BLK_F_TOPOLOGY);
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index 7d4601cb5d..1414fb85ae 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -557,7 +557,6 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t features,
vser = VIRTIO_SERIAL(vdev);
- features |= vser->host_features;
if (vser->bus.max_nr_ports > 1) {
virtio_add_feature(&features, VIRTIO_CONSOLE_F_MULTIPORT);
}
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index dd0d056fde..8ecdc1cd83 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -715,9 +715,6 @@ static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_queue(n->nic);
- /* Firstly sync all virtio-net possible supported features */
- features |= n->host_features;
-
virtio_add_feature(&features, VIRTIO_NET_F_MAC);
if (!peer_has_vnet_hdr(n)) {
diff --git a/hw/scsi/vhost-scsi-common.c b/hw/scsi/vhost-scsi-common.c
index 767f827e55..8b26f90aa1 100644
--- a/hw/scsi/vhost-scsi-common.c
+++ b/hw/scsi/vhost-scsi-common.c
@@ -124,9 +124,6 @@ uint64_t vhost_scsi_common_get_features(VirtIODevice *vdev, uint64_t features,
{
VHostSCSICommon *vsc = VHOST_SCSI_COMMON(vdev);
- /* Turn on predefined features supported by this device */
- features |= vsc->host_features;
-
return vhost_get_features(&vsc->dev, vsc->feature_bits, features);
}
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 4141dddd51..f754611dfe 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -816,10 +816,6 @@ static uint64_t virtio_scsi_get_features(VirtIODevice *vdev,
uint64_t requested_features,
Error **errp)
{
- VirtIOSCSI *s = VIRTIO_SCSI(vdev);
-
- /* Firstly sync all virtio-scsi possible supported features */
- requested_features |= s->host_features;
return requested_features;
}
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 73ac5eb675..0e9ca71b15 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -796,8 +796,6 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
static uint64_t virtio_balloon_get_features(VirtIODevice *vdev, uint64_t f,
Error **errp)
{
- VirtIOBalloon *dev = VIRTIO_BALLOON(vdev);
- f |= dev->host_features;
virtio_add_feature(&f, VIRTIO_BALLOON_F_STATS_VQ);
return f;
--
2.37.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] virtio: remove unnecessary host_features in ->get_features()
2022-08-02 13:28 [PATCH] virtio: remove unnecessary host_features in ->get_features() Stefan Hajnoczi
@ 2022-08-02 15:31 ` Cornelia Huck
0 siblings, 0 replies; 3+ messages in thread
From: Cornelia Huck @ 2022-08-02 15:31 UTC (permalink / raw)
To: Stefan Hajnoczi, qemu-devel
Cc: Michael S. Tsirkin, Jason Wang, Paolo Bonzini, Laurent Vivier,
Hanna Reitz, Stefan Hajnoczi, qemu-block, David Hildenbrand,
Marc-André Lureau, Kevin Wolf, Fam Zheng, Amit Shah
On Tue, Aug 02 2022, Stefan Hajnoczi <stefanha@redhat.com> wrote:
> Since at least commit 6b8f1020540c27246277377aa2c3331ad2bfb160 ("virtio:
> move host_features") the ->get_features() function has been called with
> host_features as an argument.
>
> Some devices manually add host_features in ->get_features() although the
> features argument already contains host_features. Make all devices
> consistent by dropping the unnecessary code.
I wonder whether we should add that explicitly to the contract for
get_features()?
>
> Cc: Cornelia Huck <cohuck@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> hw/block/virtio-blk.c | 3 ---
> hw/char/virtio-serial-bus.c | 1 -
> hw/net/virtio-net.c | 3 ---
> hw/scsi/vhost-scsi-common.c | 3 ---
> hw/scsi/virtio-scsi.c | 4 ----
> hw/virtio/virtio-balloon.c | 2 --
> 6 files changed, 16 deletions(-)
The change seems sane to me.
^ permalink raw reply [flat|nested] 3+ messages in thread
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