[Kernel-packages] [Bug 1954473] Re: KVM Shared Virtual Memory (SVM)
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954473 Title: KVM Shared Virtual Memory (SVM) Status in linux package in Ubuntu: Expired Bug description: SVM is short for shared virtual memory. This task is aiming at enabling SVM support for assigned devices on KVM. Example: assign a GPU from host to guest, the application program running in guest could share its virtual memory address to the assigned device. Latest update: extend the vIOMMU in QEMU to support SVM feature. 1. Description of the Technology. SVM is shorted for Shared Virtual Memory, it is a VT-d feature that allows sharing application virtual address space with the I/O device. The feature works with the PCI sig Process Address Space ID (PASID). SVM has the following benefits: • Programmer gets a consistent view of memory across host application and device • Efficient access to data, avoiding pining or copying overheads 2. Use cases that is important for this technology (aka, why is this technology needed). Intel has multiple IPs that would support SVM, and the usage in guest is also a demand. e.g. QAT, it is usual to assign a QAT to guest and requires SVM to benefit from its advantages. 3. General design description (components modified: kvm, qemu-kvm, driver, libvirt (and other userland libraries)) Modified components would include: qemu-kvm, vfio driver, iommu driver Target Linux 5.19 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954473/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1954473] Re: KVM Shared Virtual Memory (SVM)
Thanks for correcting pkg names. No upstream commits yet. Target Linux 5.19 timeframe. Target Ubuntu 23.04. Platform is Sapphire Rapids -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954473 Title: KVM Shared Virtual Memory (SVM) Status in linux package in Ubuntu: Incomplete Bug description: SVM is short for shared virtual memory. This task is aiming at enabling SVM support for assigned devices on KVM. Example: assign a GPU from host to guest, the application program running in guest could share its virtual memory address to the assigned device. Latest update: extend the vIOMMU in QEMU to support SVM feature. 1. Description of the Technology. SVM is shorted for Shared Virtual Memory, it is a VT-d feature that allows sharing application virtual address space with the I/O device. The feature works with the PCI sig Process Address Space ID (PASID). SVM has the following benefits: • Programmer gets a consistent view of memory across host application and device • Efficient access to data, avoiding pining or copying overheads 2. Use cases that is important for this technology (aka, why is this technology needed). Intel has multiple IPs that would support SVM, and the usage in guest is also a demand. e.g. QAT, it is usual to assign a QAT to guest and requires SVM to benefit from its advantages. 3. General design description (components modified: kvm, qemu-kvm, driver, libvirt (and other userland libraries)) Modified components would include: qemu-kvm, vfio driver, iommu driver Target Linux 5.19 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954473/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1954473] Re: KVM Shared Virtual Memory (SVM)
** Tags added: intel-bug-december-2021 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954473 Title: KVM Shared Virtual Memory (SVM) Status in linux package in Ubuntu: Incomplete Bug description: SVM is short for shared virtual memory. This task is aiming at enabling SVM support for assigned devices on KVM. Example: assign a GPU from host to guest, the application program running in guest could share its virtual memory address to the assigned device. Latest update: extend the vIOMMU in QEMU to support SVM feature. 1. Description of the Technology. SVM is shorted for Shared Virtual Memory, it is a VT-d feature that allows sharing application virtual address space with the I/O device. The feature works with the PCI sig Process Address Space ID (PASID). SVM has the following benefits: • Programmer gets a consistent view of memory across host application and device • Efficient access to data, avoiding pining or copying overheads 2. Use cases that is important for this technology (aka, why is this technology needed). Intel has multiple IPs that would support SVM, and the usage in guest is also a demand. e.g. QAT, it is usual to assign a QAT to guest and requires SVM to benefit from its advantages. 3. General design description (components modified: kvm, qemu-kvm, driver, libvirt (and other userland libraries)) Modified components would include: qemu-kvm, vfio driver, iommu driver Target Linux 5.19 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954473/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1954473] Re: KVM Shared Virtual Memory (SVM)
Hi Paul, Bugs in launchpad are filed against source packages, and "src:kvm" doesn't exist for more than 8 years now :-) Instead you'd want to file it against the package the code is in, in your case most likely src:qemu [1] or src:linux [2]. Also you should talk about the target Ubuntu release you want the fix to be in. I assume from the type of bug that you want to feature request for the coming LTS Ubuntu 22.04 - but please clarify to be sure. Finally referencing to features/commits works much better if you could please include the hashes of the commits. Please consider doing so once they exist upstream. If they are not existing there someone needs to provide the patches upfront and convince the team that they are stable enough to be picked up. The referred kernel version is in the future, so that might be a normal bug for a new feature. I'll re-assign this to src:linux for now as your bug indicates that is the target. [1]: https://bugs.launchpad.net/ubuntu/+source/qemu [2]: https://bugs.launchpad.net/ubuntu/+source/linux ** Package changed: kvm (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1954473 Title: KVM Shared Virtual Memory (SVM) Status in linux package in Ubuntu: Incomplete Bug description: SVM is short for shared virtual memory. This task is aiming at enabling SVM support for assigned devices on KVM. Example: assign a GPU from host to guest, the application program running in guest could share its virtual memory address to the assigned device. Latest update: extend the vIOMMU in QEMU to support SVM feature. 1. Description of the Technology. SVM is shorted for Shared Virtual Memory, it is a VT-d feature that allows sharing application virtual address space with the I/O device. The feature works with the PCI sig Process Address Space ID (PASID). SVM has the following benefits: • Programmer gets a consistent view of memory across host application and device • Efficient access to data, avoiding pining or copying overheads 2. Use cases that is important for this technology (aka, why is this technology needed). Intel has multiple IPs that would support SVM, and the usage in guest is also a demand. e.g. QAT, it is usual to assign a QAT to guest and requires SVM to benefit from its advantages. 3. General design description (components modified: kvm, qemu-kvm, driver, libvirt (and other userland libraries)) Modified components would include: qemu-kvm, vfio driver, iommu driver Target Linux 5.19 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954473/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
