search for: host_cmd

...?? int ret = 0; >>>> +??? u8 status; >>>> + >>>> +??? pci_epf = to_virtio_pci_epf(vp_dev); >>>> +??? ioaddr = vp_dev->ioaddr; >>>> + >>>> +??? mutex_lock(&pci_epf->lock); >>>> +??? writeb(command, ioaddr + HOST_CMD); >>>> +??? timeout = ktime_add_ms(ktime_get(), COMMAND_TIMEOUT); >>>> +??? while (1) { >>>> +??? ??? timedout = ktime_after(ktime_get(), timeout); >>>> +??? ??? status = readb(ioaddr + HOST_CMD_STATUS); >>>> + >>>> >>&gt...

Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the support of reporting hints of guest free pages to host via virtio-balloon. Host requests the guest to report free page hints by sending a command to the guest via setting the VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT bit of the host_cmd config register. As the first step here, virtio-balloon only reports free page hints from the max order (10) free page list to host. This has generated similar good results as reporting all free page hints during our tests. TODO: - support reporting free page hi...

...time_t timeout; >> +??? bool timedout; >> +??? int ret = 0; >> +??? u8 status; >> + >> +??? pci_epf = to_virtio_pci_epf(vp_dev); >> +??? ioaddr = vp_dev->ioaddr; >> + >> +??? mutex_lock(&pci_epf->lock); >> +??? writeb(command, ioaddr + HOST_CMD); >> +??? timeout = ktime_add_ms(ktime_get(), COMMAND_TIMEOUT); >> +??? while (1) { >> +??? ??? timedout = ktime_after(ktime_get(), timeout); >> +??? ??? status = readb(ioaddr + HOST_CMD_STATUS); >> + >> >> Several questions: >> >> - It's no...

...ps://lkml.org/lkml/2018/6/11/764 This avoids the complex call chain, and looks more prudent. - virtio-balloon: - use a fix-sized buffer to get free page hints; - remove the cmd id related interface. Now host can just send a free page hint command to the guest (via the host_cmd config register) to start the reporting. Currentlty the guest reports only the max order free page hints to host, which has generated similar good results as before. But the interface used by virtio-balloon to report can support reporting more orders in the future wh...

...ps://lkml.org/lkml/2018/6/11/764 This avoids the complex call chain, and looks more prudent. - virtio-balloon: - use a fix-sized buffer to get free page hints; - remove the cmd id related interface. Now host can just send a free page hint command to the guest (via the host_cmd config register) to start the reporting. Currentlty the guest reports only the max order free page hints to host, which has generated similar good results as before. But the interface used by virtio-balloon to report can support reporting more orders in the future wh...

On Friday, June 15, 2018 7:30 PM, Michael S. Tsirkin wrote: > On Fri, Jun 15, 2018 at 12:43:09PM +0800, Wei Wang wrote: > > - remove the cmd id related interface. Now host can just send a free > > page hint command to the guest (via the host_cmd config register) > > to start the reporting. > > Here we go again. And what if reporting was already started previously? > I don't think it's a good idea to tweak the host/guest interface yet again. This interface is much simpler, and I'm not sure if that would...

...ang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the > support of reporting hints of guest free pages to host via virtio-balloon. > > Host requests the guest to report free page hints by sending a command > to the guest via setting the VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT bit > of the host_cmd config register. > > As the first step here, virtio-balloon only reports free page hints from > the max order (10) free page list to host. This has generated similar good > results as reporting all free page hints during our tests. > > TOD...

...ang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates the > support of reporting hints of guest free pages to host via virtio-balloon. > > Host requests the guest to report free page hints by sending a command > to the guest via setting the VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT bit > of the host_cmd config register. > > As the first step here, virtio-balloon only reports free page hints from > the max order (10) free page list to host. This has generated similar good > results as reporting all free page hints during our tests. > > TOD...

Hi, This is a proof of concept of GPU forwarding for Linux guest on Linux host. I'd like to get comments and suggestions from community before I put more time on it. To summarize what it is: 1. It's a solution to bring GPU acceleration for Linux vm guest on Linux host. It could works with different GPU although the current proof of concept only works with Intel GPU. 2. The basic idea

..._F_FREE_PAGE_HINT feature indicates > > > the support of reporting hints of guest free pages to host via virtio-balloon. > > > > > > Host requests the guest to report free page hints by sending a command > > > to the guest via setting the > > VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT > > > bit of the host_cmd config register. > > > > > > As the first step here, virtio-balloon only reports free page hints > > > from the max order (10) free page list to host. This has generated > > > similar good results as reporting all...

..._F_FREE_PAGE_HINT feature indicates > > > the support of reporting hints of guest free pages to host via virtio-balloon. > > > > > > Host requests the guest to report free page hints by sending a command > > > to the guest via setting the > > VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT > > > bit of the host_cmd config register. > > > > > > As the first step here, virtio-balloon only reports free page hints > > > from the max order (10) free page list to host. This has generated > > > similar good results as reporting all...

On Fri, Jun 15, 2018 at 12:43:09PM +0800, Wei Wang wrote: > - remove the cmd id related interface. Now host can just send a free > page hint command to the guest (via the host_cmd config register) > to start the reporting. Here we go again. And what if reporting was already started previously? I don't think it's a good idea to tweak the host/guest interface yet again. -- MST

...ion of the VIRTIO_BALLOON_F_FREE_PAGE_HINT feature indicates > > the support of reporting hints of guest free pages to host via virtio-balloon. > > > > Host requests the guest to report free page hints by sending a command > > to the guest via setting the > VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT > > bit of the host_cmd config register. > > > > As the first step here, virtio-balloon only reports free page hints > > from the max order (10) free page list to host. This has generated > > similar good results as reporting all free page hints during o...

...> > > indicates the support of reporting hints of guest free pages to host via > virtio-balloon. > > > > > > > > Host requests the guest to report free page hints by sending a > > > > command to the guest via setting the > > > VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT > > > > bit of the host_cmd config register. > > > > > > > > As the first step here, virtio-balloon only reports free page > > > > hints from the max order (10) free page list to host. This has > > > > generated similar good...

On Thu, Jul 02, 2020 at 01:51:21PM +0530, Kishon Vijay Abraham I wrote: > This series enhances Linux Vhost support to enable SoC-to-SoC > communication over MMIO. This series enables rpmsg communication between > two SoCs using both PCIe RC<->EP and HOST1-NTB-HOST2 > > 1) Modify vhost to use standard Linux driver model > 2) Add support in vring to access virtqueue over

On Thu, Jul 02, 2020 at 01:51:21PM +0530, Kishon Vijay Abraham I wrote: > This series enhances Linux Vhost support to enable SoC-to-SoC > communication over MMIO. This series enables rpmsg communication between > two SoCs using both PCIe RC<->EP and HOST1-NTB-HOST2 > > 1) Modify vhost to use standard Linux driver model > 2) Add support in vring to access virtqueue over

...ommand) +{ +??? struct virtio_pci_epf *pci_epf; +??? void __iomem *ioaddr; +??? ktime_t timeout; +??? bool timedout; +??? int ret = 0; +??? u8 status; + +??? pci_epf = to_virtio_pci_epf(vp_dev); +??? ioaddr = vp_dev->ioaddr; + +??? mutex_lock(&pci_epf->lock); +??? writeb(command, ioaddr + HOST_CMD); +??? timeout = ktime_add_ms(ktime_get(), COMMAND_TIMEOUT); +??? while (1) { +??? ??? timedout = ktime_after(ktime_get(), timeout); +??? ??? status = readb(ioaddr + HOST_CMD_STATUS); + Several questions: - It's not clear to me how the synchronization is done between the RC and EP. E.g how a...

.../11/764 > This avoids the complex call chain, and looks more prudent. > - virtio-balloon: > - use a fix-sized buffer to get free page hints; > - remove the cmd id related interface. Now host can just send a free > page hint command to the guest (via the host_cmd config register) > to start the reporting. Currentlty the guest reports only the max > order free page hints to host, which has generated similar good > results as before. But the interface used by virtio-balloon to > report can support reporting more ord...

...the support of reporting hints of guest free pages to host via > > virtio-balloon. > > > > > > > > > > Host requests the guest to report free page hints by sending a > > > > > command to the guest via setting the > > > > VIRTIO_BALLOON_HOST_CMD_FREE_PAGE_HINT > > > > > bit of the host_cmd config register. > > > > > > > > > > As the first step here, virtio-balloon only reports free page > > > > > hints from the max order (10) free page list to host. This has > > > > &g...

...ps://lkml.org/lkml/2018/6/11/764 This avoids the complex call chain, and looks more prudent. - virtio-balloon: - use a fix-sized buffer to get free page hints; - remove the cmd id related interface. Now host can just send a free page hint command to the guest (via the host_cmd config register) to start the reporting. Currentlty the guest reports only the max order free page hints to host, which has generated similar good results as before. But the interface used by virtio-balloon to report can support reporting more orders in the future wh...