search for: vhost_cross_endian_legaci

On Thu, Jul 02, 2015 at 11:12:56AM +0200, Greg Kurz wrote: > On Thu, 2 Jul 2015 08:01:28 +0200 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Wed, Jul 01, 2015 at 12:02:50PM -0700, Linus Torvalds wrote: > > > On Wed, Jul 1, 2015 at 2:31 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > > > > virtio/vhost: cross endian support

On Thu, Jul 02, 2015 at 11:12:56AM +0200, Greg Kurz wrote: > On Thu, 2 Jul 2015 08:01:28 +0200 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Wed, Jul 01, 2015 at 12:02:50PM -0700, Linus Torvalds wrote: > > > On Wed, Jul 1, 2015 at 2:31 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > > > > virtio/vhost: cross endian support

On Wed, Jul 01, 2015 at 12:02:50PM -0700, Linus Torvalds wrote: > On Wed, Jul 1, 2015 at 2:31 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > > virtio/vhost: cross endian support > > Ugh. Does this really have to be dynamic? > > Can't virtio do the sane thing, and just use a _fixed_ endianness? > > Doing a unconditional byte swap is faster and simpler

On Wed, Jul 01, 2015 at 12:02:50PM -0700, Linus Torvalds wrote: > On Wed, Jul 1, 2015 at 2:31 AM, Michael S. Tsirkin <mst at redhat.com> wrote: > > virtio/vhost: cross endian support > > Ugh. Does this really have to be dynamic? > > Can't virtio do the sane thing, and just use a _fixed_ endianness? > > Doing a unconditional byte swap is faster and simpler

On Tue, Jul 07, 2015 at 06:36:53PM +0200, Thomas Huth wrote: > On Thu, 2 Jul 2015 11:32:52 +0200 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Thu, Jul 02, 2015 at 11:12:56AM +0200, Greg Kurz wrote: > > > On Thu, 2 Jul 2015 08:01:28 +0200 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > ... > > > >

On Tue, Jul 07, 2015 at 06:36:53PM +0200, Thomas Huth wrote: > On Thu, 2 Jul 2015 11:32:52 +0200 > "Michael S. Tsirkin" <mst at redhat.com> wrote: > > > On Thu, Jul 02, 2015 at 11:12:56AM +0200, Greg Kurz wrote: > > > On Thu, 2 Jul 2015 08:01:28 +0200 > > > "Michael S. Tsirkin" <mst at redhat.com> wrote: > ... > > > >

On Thu, 2 Jul 2015 11:32:52 +0200 "Michael S. Tsirkin" <mst at redhat.com> wrote: > On Thu, Jul 02, 2015 at 11:12:56AM +0200, Greg Kurz wrote: > > On Thu, 2 Jul 2015 08:01:28 +0200 > > "Michael S. Tsirkin" <mst at redhat.com> wrote: ... > > > Yea, well - support for legacy BE guests on the new LE hosts is > > > exactly the

On 2/19/20 7:56 PM, Jason Wang wrote: > This patch factors out IOTLB into a dedicated module in order to be > reused by other modules like vringh. User may choose to enable the > automatic retiring by specifying VHOST_IOTLB_FLAG_RETIRE flag to fit > for the case of vhost device IOTLB implementation. > > Signed-off-by: Jason Wang <jasowang at redhat.com> > --- >

On Thu, Mar 26, 2020 at 10:01:17PM +0800, Jason Wang wrote: > Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is > not necessarily for VM since it's a generic userspace and kernel > communication protocol. Such dependency may prevent archs without > virtualization support from using vhost. > > To solve this, a dedicated vhost menu is created under drivers

On Thu, Mar 26, 2020 at 10:01:17PM +0800, Jason Wang wrote: > Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is > not necessarily for VM since it's a generic userspace and kernel > communication protocol. Such dependency may prevent archs without > virtualization support from using vhost. > > To solve this, a dedicated vhost menu is created under drivers

On Thu, 23 Apr 2015 17:29:42 +0200 Greg Kurz <gkurz at linux.vnet.ibm.com> wrote: > This patch brings cross-endian support to vhost when used to implement > legacy virtio devices. Since it is a relatively rare situation, the > feature availability is controlled by a kernel config option (not set > by default). > > The vq->is_le boolean field is added to cache the

On Thu, 23 Apr 2015 17:29:42 +0200 Greg Kurz <gkurz at linux.vnet.ibm.com> wrote: > This patch brings cross-endian support to vhost when used to implement > legacy virtio devices. Since it is a relatively rare situation, the > feature availability is controlled by a kernel config option (not set > by default). > > The vq->is_le boolean field is added to cache the

On 09/07/2015 09:49, Thomas Huth wrote: > The option for supporting cross-endianness legacy guests in > the vhost and tun code should only be available on systems > that support cross-endian guests. I'm sure I misunderstand something, but what happens if we use QEMU with TCG instead of KVM, i.e. a big endian powerpc kernel guest on x86_64 little endian host ? Do you forbid the use of

On 09/07/2015 09:49, Thomas Huth wrote: > The option for supporting cross-endianness legacy guests in > the vhost and tun code should only be available on systems > that support cross-endian guests. I'm sure I misunderstand something, but what happens if we use QEMU with TCG instead of KVM, i.e. a big endian powerpc kernel guest on x86_64 little endian host ? Do you forbid the use of

On Wed, Apr 01, 2020 at 10:08:59PM +0800, Jason Wang wrote: > > On 2020/4/1 ??9:22, Michael S. Tsirkin wrote: > > On Thu, Mar 26, 2020 at 10:01:17PM +0800, Jason Wang wrote: > > > Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is > > > not necessarily for VM since it's a generic userspace and kernel > > > communication protocol. Such

On Wed, Apr 01, 2020 at 10:08:59PM +0800, Jason Wang wrote: > > On 2020/4/1 ??9:22, Michael S. Tsirkin wrote: > > On Thu, Mar 26, 2020 at 10:01:17PM +0800, Jason Wang wrote: > > > Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is > > > not necessarily for VM since it's a generic userspace and kernel > > > communication protocol. Such

On Fri, 24 Apr 2015 09:19:26 +0200 Cornelia Huck <cornelia.huck at de.ibm.com> wrote: > On Thu, 23 Apr 2015 17:29:42 +0200 > Greg Kurz <gkurz at linux.vnet.ibm.com> wrote: > > > This patch brings cross-endian support to vhost when used to implement > > legacy virtio devices. Since it is a relatively rare situation, the > > feature availability is controlled

This patch brings cross-endian support to vhost when used to implement legacy virtio devices. Since it is a relatively rare situation, the feature availability is controlled by a kernel config option (not set by default). The vq->is_le boolean field is added to cache the endianness to be used for ring accesses. It defaults to native endian, as expected by legacy virtio devices. When the ring

On 2020/4/1 ??10:27, Michael S. Tsirkin wrote: > On Wed, Apr 01, 2020 at 10:13:29PM +0800, Jason Wang wrote: >> On 2020/4/1 ??9:02, Christian Borntraeger wrote: >>> On 01.04.20 14:56, Christian Borntraeger wrote: >>>> On 01.04.20 14:50, Jason Wang wrote: >>>>> On 2020/4/1 ??7:21, Christian Borntraeger wrote: >>>>>> On 26.03.20 15:01,

On 2020/4/1 ??10:27, Michael S. Tsirkin wrote: > On Wed, Apr 01, 2020 at 10:13:29PM +0800, Jason Wang wrote: >> On 2020/4/1 ??9:02, Christian Borntraeger wrote: >>> On 01.04.20 14:56, Christian Borntraeger wrote: >>>> On 01.04.20 14:50, Jason Wang wrote: >>>>> On 2020/4/1 ??7:21, Christian Borntraeger wrote: >>>>>> On 26.03.20 15:01,