From: Sergei Shtylyov <sergei.shtylyov@cogentembedded•com>
To: "Michael S. Tsirkin" <mst@redhat•com>, linux-kernel@vger•kernel.org
Cc: thuth@linux•vnet.ibm.com, kvm@vger•kernel.org, rusty@au1•ibm.com,
netdev@vger•kernel.org,
virtualization@lists•linux-foundation.org,
dahi@linux•vnet.ibm.com, pbonzini@redhat•com,
David Miller <davem@davemloft•net>
Subject: Re: [PATCH v7 28/46] vhost: make features 64 bit
Date: Sun, 30 Nov 2014 18:44:33 +0300 [thread overview]
Message-ID: <547B3B61.3090801@cogentembedded.com> (raw)
In-Reply-To: <1417359787-10138-29-git-send-email-mst@redhat.com>
Hello.
On 11/30/2014 6:11 PM, Michael S. Tsirkin wrote:
> We need to use bit 32 for virtio 1.0
> Signed-off-by: Michael S. Tsirkin <mst@redhat•com>
> Reviewed-by: Jason Wang <jasowang@redhat•com>
> ---
> drivers/vhost/vhost.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
> index 3eda654..c624b09 100644
> --- a/drivers/vhost/vhost.h
> +++ b/drivers/vhost/vhost.h
> @@ -106,7 +106,7 @@ struct vhost_virtqueue {
> /* Protected by virtqueue mutex. */
> struct vhost_memory *memory;
> void *private_data;
> - unsigned acked_features;
> + u64 acked_features;
> /* Log write descriptors */
> void __user *log_base;
> struct vhost_log *log;
> @@ -174,6 +174,6 @@ enum {
>
> static inline int vhost_has_feature(struct vhost_virtqueue *vq, int bit)
> {
> - return vq->acked_features & (1 << bit);
> + return vq->acked_features & (1ULL << bit);
Erm, wouldn't the high word be just dropped when returning *int*? I think
you need !!(vq->acked_features & (1ULL << bit)).
[...]
WBR, Sergei
next prev parent reply other threads:[~2014-11-30 15:44 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1417359787-10138-1-git-send-email-mst@redhat.com>
2014-11-30 15:10 ` [PATCH v7 15/46] virtio_net: v1.0 endianness Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 23/46] virtio_net: pass vi around Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 24/46] virtio_net: get rid of virtio_net_hdr/skb_vnet_hdr Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 25/46] virtio_net: stricter short buffer length checks Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 26/46] virtio_net: bigger header when VERSION_1 is set Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 27/46] virtio_net: enable v1.0 support Michael S. Tsirkin
2014-12-01 11:40 ` Cornelia Huck
2014-12-01 11:47 ` Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 28/46] vhost: make features 64 bit Michael S. Tsirkin
2014-11-30 15:44 ` Sergei Shtylyov [this message]
2014-12-01 4:12 ` Ben Hutchings
2014-12-01 9:19 ` Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 29/46] vhost: add memory access wrappers Michael S. Tsirkin
2014-12-01 12:13 ` Cornelia Huck
2014-11-30 15:11 ` [PATCH v7 30/46] vhost/net: force len for TX to host endian Michael S. Tsirkin
2014-12-01 12:20 ` Cornelia Huck
2014-12-01 12:33 ` Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 31/46] vhost: virtio 1.0 endian-ness support Michael S. Tsirkin
2014-12-01 12:33 ` Cornelia Huck
2014-12-01 12:37 ` Michael S. Tsirkin
2014-12-01 12:42 ` Cornelia Huck
2014-12-01 12:49 ` Michael S. Tsirkin
2014-12-01 15:45 ` Michael S. Tsirkin
2014-11-30 15:11 ` [PATCH v7 32/46] vhost/net: virtio 1.0 byte swap Michael S. Tsirkin
2014-12-01 12:35 ` Cornelia Huck
2014-11-30 15:11 ` [PATCH v7 33/46] vhost/net: larger header for virtio 1.0 Michael S. Tsirkin
2014-12-01 12:35 ` Cornelia Huck
2014-11-30 15:12 ` [PATCH v7 34/46] virtio_net: disable mac write " Michael S. Tsirkin
2014-12-01 11:41 ` Cornelia Huck
2014-11-30 15:12 ` [PATCH v7 35/46] vhost/net: enable " Michael S. Tsirkin
2014-11-30 15:12 ` [PATCH v7 36/46] vhost/net: suppress compiler warning Michael S. Tsirkin
2014-12-01 12:37 ` Cornelia Huck
2014-12-01 13:48 ` Michael S. Tsirkin
2014-12-01 14:21 ` Cornelia Huck
2014-12-01 15:12 ` Michael S. Tsirkin
2014-12-01 15:18 ` Cornelia Huck
2014-11-30 15:12 ` [PATCH v7 37/46] tun: move internal flag defines out of uapi Michael S. Tsirkin
2014-11-30 15:12 ` [PATCH v7 38/46] tun: drop most type defines Michael S. Tsirkin
2014-11-30 15:12 ` [PATCH v7 39/46] tun: add VNET_LE flag Michael S. Tsirkin
2014-11-30 15:12 ` [PATCH v7 40/46] tun: TUN_VNET_LE support, fix sparse warnings for virtio headers Michael S. Tsirkin
2014-11-30 15:12 ` [PATCH v7 41/46] macvtap: TUN_VNET_LE support Michael S. Tsirkin
2014-11-30 15:13 ` [PATCH v7 45/46] vhost/scsi: partial virtio 1.0 support Michael S. Tsirkin
2014-11-30 15:13 ` [PATCH v7 46/46] af_packet: virtio 1.0 stubs Michael S. Tsirkin
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