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> -----Original Message----- > From: Alex Williamson [mailto:alex.williamson at redhat.com] > Sent: Tuesday, July 02, 2013 9:46 AM > To: Yoder Stuart-B08248 > Cc: kvm at vger.kernel.org list; Alexander Graf; Bhushan Bharat-R65777; a.motakis at virtualopensystems.com; > virtualization at lists.linux-foundation.org > Subject: Re: binding/unbinding devices to vfio-pci > > On Tue, 2013-07-02 at 14:15 +0000, Yoder Stuart-B08248 wrote: > > Alex, > > > > I'm trying to think through how binding/un...

> -----Original Message----- > From: Alex Williamson [mailto:alex.williamson at redhat.com] > Sent: Tuesday, July 02, 2013 9:46 AM > To: Yoder Stuart-B08248 > Cc: kvm at vger.kernel.org list; Alexander Graf; Bhushan Bharat-R65777; a.motakis at virtualopensystems.com; > virtualization at lists.linux-foundation.org > Subject: Re: binding/unbinding devices to vfio-pci > > On Tue, 2013-07-02 at 14:15 +0000, Yoder Stuart-B08248 wrote: > > Alex, > > > > I'm trying to think through how binding/un...

> -----Original Message----- > From: Wood Scott-B07421 > Sent: Tuesday, July 16, 2013 5:01 PM > To: Yoder Stuart-B08248 > Cc: Wood Scott-B07421; Alex Williamson; Alexander Graf; Bhushan Bharat-R65777; Sethi Varun-B16395; > virtualization at lists.linux-foundation.org; Antonios Motakis; kvm at vger.kernel.org list; kvm- > ppc at vger.kernel.org; kvmarm at lists.cs.columbia.edu > Subject: Re: RFC: vfio interface for platform devices > > On 07/16/2013 04:51:12 PM, Yoder Stuart-B082...

> -----Original Message----- > From: Wood Scott-B07421 > Sent: Tuesday, July 16, 2013 5:01 PM > To: Yoder Stuart-B08248 > Cc: Wood Scott-B07421; Alex Williamson; Alexander Graf; Bhushan Bharat-R65777; Sethi Varun-B16395; > virtualization at lists.linux-foundation.org; Antonios Motakis; kvm at vger.kernel.org list; kvm- > ppc at vger.kernel.org; kvmarm at lists.cs.columbia.edu > Subject: Re: RFC: vfio interface for platform devices > > On 07/16/2013 04:51:12 PM, Yoder Stuart-B082...

> -----Original Message----- > From: Wood Scott-B07421 > Sent: Wednesday, July 03, 2013 1:52 PM > To: Alexander Graf > Cc: Yoder Stuart-B08248; Alex Williamson; Wood Scott-B07421; Bhushan Bharat-R65777; Sethi Varun-B16395; > virtualization at lists.linux-foundation.org; Antonios Motakis; kvm at vger.kernel.org list; kvm- > ppc at vger.kernel.org; kvmarm at lists.cs.columbia.edu > Subject: Re: RFC: vfio interface for platform devices > > On 07/02/2013 08:07:53 PM, Alexander Graf wr...

On 07/02/2013 08:07:53 PM, Alexander Graf wrote: > > On 03.07.2013, at 01:25, Yoder Stuart-B08248 wrote: > > > 8. Open Issues > > > > -how to handle cases where VFIO is requested to handle > > a device where the valid, mappable range for a region > > is less than a page size. See example above where an > > advertised region in the DMA

On 07/02/2013 08:07:53 PM, Alexander Graf wrote: > > On 03.07.2013, at 01:25, Yoder Stuart-B08248 wrote: > > > 8. Open Issues > > > > -how to handle cases where VFIO is requested to handle > > a device where the valid, mappable range for a region > > is less than a page size. See example above where an > > advertised region in the DMA

> -----Original Message----- > From: Wood Scott-B07421 > Sent: Wednesday, July 03, 2013 5:32 PM > To: Yoder Stuart-B08248 > Cc: Alex Williamson; Alexander Graf; Wood Scott-B07421; Bhushan Bharat-R65777; Sethi Varun-B16395; > virtualization at lists.linux-foundation.org; Antonios Motakis; kvm at vger.kernel.org list; kvm- > ppc at vger.kernel.org; kvmarm at lists.cs.columbia.edu > Subject: Re: RFC: vfio interface for platform devices > > On 07/02/2013 06:25:59 PM, Yoder Stuart-B082...

> -----Original Message----- > From: Wood Scott-B07421 > Sent: Wednesday, July 03, 2013 5:32 PM > To: Yoder Stuart-B08248 > Cc: Alex Williamson; Alexander Graf; Wood Scott-B07421; Bhushan Bharat-R65777; Sethi Varun-B16395; > virtualization at lists.linux-foundation.org; Antonios Motakis; kvm at vger.kernel.org list; kvm- > ppc at vger.kernel.org; kvmarm at lists.cs.columbia.edu > Subject: Re: RFC: vfio interface for platform devices > > On 07/02/2013 06:25:59 PM, Yoder Stuart-B082...

virtio: Virtio platform driver [PATCH 01/02] virtio: Break out lguest virtio code to virtio_lguest.c [PATCH 02/02] virtio: Add virtio platform driver These patches add a virtio platform driver to the Linux kernel. This platform driver has the same role as the virtio_pci driver, but instead of building on top of emulated PCI this driver is making use of the platform bus together with driver

virtio: Virtio platform driver [PATCH 01/02] virtio: Break out lguest virtio code to virtio_lguest.c [PATCH 02/02] virtio: Add virtio platform driver These patches add a virtio platform driver to the Linux kernel. This platform driver has the same role as the virtio_pci driver, but instead of building on top of emulated PCI this driver is making use of the platform bus together with driver

Alex, I'm trying to think through how binding/unbinding of devices will work with VFIO for platform devices and have a couple of questions about how vfio-pci works. When you bind a device to vfio-pci, e.g.: # echo 1102 0002 > /sys/bus/pci/drivers/vfio-pci/new_id ...I understand that the echo into 'new_id' tells the vfio pci driver that it now handles the specified PCI ID. But

Alex, I'm trying to think through how binding/unbinding of devices will work with VFIO for platform devices and have a couple of questions about how vfio-pci works. When you bind a device to vfio-pci, e.g.: # echo 1102 0002 > /sys/bus/pci/drivers/vfio-pci/new_id ...I understand that the echo into 'new_id' tells the vfio pci driver that it now handles the specified PCI ID. But

> -----Original Message----- > From: linux-pci-owner at vger.kernel.org [mailto:linux-pci-owner at vger.kernel.org] > On Behalf Of Yijing Wang > Sent: Wednesday, August 20, 2014 11:59 AM > To: Bhushan Bharat-R65777; Basu Arnab-B45036 > Cc: Xinwei Hu; Wuyun; Bjorn Helgaas; linux-pci at vger.kernel.org; > Paul.Mundt at huawei.com; James E.J. Bottomley; Marc Zyngier; linux-arm- > kernel at lists.infradead.org; Russell King; linux-arch at vger.kernel.org; > virtualization at lists.linux-foundation.org...

> -----Original Message----- > From: linux-pci-owner at vger.kernel.org [mailto:linux-pci-owner at vger.kernel.org] > On Behalf Of Yijing Wang > Sent: Wednesday, August 20, 2014 11:59 AM > To: Bhushan Bharat-R65777; Basu Arnab-B45036 > Cc: Xinwei Hu; Wuyun; Bjorn Helgaas; linux-pci at vger.kernel.org; > Paul.Mundt at huawei.com; James E.J. Bottomley; Marc Zyngier; linux-arm- > kernel at lists.infradead.org; Russell King; linux-arch at vger.kernel.org; > virtualization at lists.linux-foundation.org...

Hi Yijing > -----Original Message----- > From: linux-pci-owner at vger.kernel.org [mailto:linux-pci-owner at vger.kernel.org] > On Behalf Of Yijing Wang > Sent: Monday, August 04, 2014 8:34 AM > To: Basu Arnab-B45036 > Cc: Xinwei Hu; Wuyun; Bjorn Helgaas; linux-pci at vger.kernel.org; > Paul.Mundt at huawei.com; James E.J. Bottomley; Marc Zyngier; linux-arm- > kernel at

Hi Yijing > -----Original Message----- > From: linux-pci-owner at vger.kernel.org [mailto:linux-pci-owner at vger.kernel.org] > On Behalf Of Yijing Wang > Sent: Monday, August 04, 2014 8:34 AM > To: Basu Arnab-B45036 > Cc: Xinwei Hu; Wuyun; Bjorn Helgaas; linux-pci at vger.kernel.org; > Paul.Mundt at huawei.com; James E.J. Bottomley; Marc Zyngier; linux-arm- > kernel at

Version 2 -VFIO_GROUP_GET_DEVICE_FD-- specified that the path is a sysfs path -VFIO_DEVICE_GET_INFO-- defined 2 flags instead of 1 -deleted VFIO_DEVICE_GET_DEVTREE_INFO ioctl -VFIO_DEVICE_GET_REGION_INFO-- updated as per AlexW's suggestion, defined 5 new flags and associated structs -VFIO_DEVICE_GET_IRQ_INFO-- updated as per AlexW's suggestion, defined 1 new flag and

Version 2 -VFIO_GROUP_GET_DEVICE_FD-- specified that the path is a sysfs path -VFIO_DEVICE_GET_INFO-- defined 2 flags instead of 1 -deleted VFIO_DEVICE_GET_DEVTREE_INFO ioctl -VFIO_DEVICE_GET_REGION_INFO-- updated as per AlexW's suggestion, defined 5 new flags and associated structs -VFIO_DEVICE_GET_IRQ_INFO-- updated as per AlexW's suggestion, defined 1 new flag and

The write-up below is the first draft of a proposal for how the kernel can expose platform devices to user space using vfio. In short, I'm proposing a new ioctl VFIO_DEVICE_GET_DEVTREE_INFO which allows user space to correlate regions and interrupts to the corresponding device tree node structure that is defined for most platform devices. Regards, Stuart Yoder