search for: msix

Don't add an option for platforms to disable MSI-X in all devices. Paul Brook will find and fix all platforms that have broken MSI-X emulation. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- This patch on top of my msix series v6 is a bit tongue in cheek: it shows what can be done and Paul seems to think it's a good idea. So even though I don't necessarily agree, I'll let others decide on it. Changes since v1: rebased on top of MSIXv6. hw/apic.c | 1 - hw/msix.c | 7 ------- hw/msix.h | 2...

Don't add an option for platforms to disable MSI-X in all devices. Paul Brook will find and fix all platforms that have broken MSI-X emulation. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- This patch on top of my msix series v6 is a bit tongue in cheek: it shows what can be done and Paul seems to think it's a good idea. So even though I don't necessarily agree, I'll let others decide on it. Changes since v1: rebased on top of MSIXv6. hw/apic.c | 1 - hw/msix.c | 7 ------- hw/msix.h | 2...

On 12/28/2014 03:52 PM, Michael S. Tsirkin wrote: > On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: >> Hi all: >> >> This series try to share MSIX irq for each tx/rx queue pair. This is >> done through: >> >> - introducing virtio pci channel which are group of virtqueues that >> sharing a single MSIX irq (Patch 1) >> - expose channel setting to virtio core api (Patch 2) >> - try to use channel setting in...

On 12/28/2014 03:52 PM, Michael S. Tsirkin wrote: > On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: >> Hi all: >> >> This series try to share MSIX irq for each tx/rx queue pair. This is >> done through: >> >> - introducing virtio pci channel which are group of virtqueues that >> sharing a single MSIX irq (Patch 1) >> - expose channel setting to virtio core api (Patch 2) >> - try to use channel setting in...

MSIX spec requires that device can be operated with all vectors masked, by polling. So the following patchset (lightly tested) adds this ability: when driver reads ISR, the device recalls a pending notification, and returns pending status in the ISR register. The polling driver can operate as follows:...

MSIX spec requires that device can be operated with all vectors masked, by polling. So the following patchset (lightly tested) adds this ability: when driver reads ISR, the device recalls a pending notification, and returns pending status in the ISR register. The polling driver can operate as follows:...

...SI-X support patch. Among missing features: save/load support, and command-line flag to control the feature. This is on top of qemu-kvm: msi-x is disabled without kvm interrupt injection support for now. Michael S. Tsirkin (2): qemu-kvm: add MSI-X support qemu-kvm: use common code for assigned msix Makefile.target | 2 +- hw/device-assignment.c | 336 +++++++++++--------------------------------- hw/device-assignment.h | 8 +- hw/msix.c | 371 ++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 33 +++++ hw/pci.c | 35 ++++--...

...SI-X support patch. Among missing features: save/load support, and command-line flag to control the feature. This is on top of qemu-kvm: msi-x is disabled without kvm interrupt injection support for now. Michael S. Tsirkin (2): qemu-kvm: add MSI-X support qemu-kvm: use common code for assigned msix Makefile.target | 2 +- hw/device-assignment.c | 336 +++++++++++--------------------------------- hw/device-assignment.h | 8 +- hw/msix.c | 371 ++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 33 +++++ hw/pci.c | 35 ++++--...

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 423 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 35 +++++ hw/pci.h | 20 +++ 4 files changed, 479 insertions(+), 1 deletions(-) create mode 100644 hw/msix.c create mode 100644 hw/msix.h diff --git a/Makefile.target b/Makefile.target index 664a...

Add functions implementing MSI-X support. First user will be virtio-pci. Note that platform must set a flag to declare MSI supported. For PC this will be set by APIC. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- Makefile.target | 2 +- hw/msix.c | 423 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ hw/msix.h | 35 +++++ hw/pci.h | 20 +++ 4 files changed, 479 insertions(+), 1 deletions(-) create mode 100644 hw/msix.c create mode 100644 hw/msix.h diff --git a/Makefile.target b/Makefile.target index 664a...

Support PV on HVM MSIX remapping The technique is the same used with MSI: if the guest enables an MSIX passing 0 as vector number, then read the address and use it as pirq number for the following mapping request to Xen. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> diff --git a/hw/pt-msi...

On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: > Hi all: > > This series try to share MSIX irq for each tx/rx queue pair. This is > done through: > > - introducing virtio pci channel which are group of virtqueues that > sharing a single MSIX irq (Patch 1) > - expose channel setting to virtio core api (Patch 2) > - try to use channel setting in virtio-net (Patch 3) &g...

On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: > Hi all: > > This series try to share MSIX irq for each tx/rx queue pair. This is > done through: > > - introducing virtio pci channel which are group of virtqueues that > sharing a single MSIX irq (Patch 1) > - expose channel setting to virtio core api (Patch 2) > - try to use channel setting in virtio-net (Patch 3) &g...

Hi maintainer, Reprodue an bug on xen-unstable, it''s an irq affinity issue for passthroughed msix device to uek1 pvhvm(2.6.32 stable). I passthrough two mptsas devices(0000:0d:0.0, 0000:1f:0.0) to a pvhvm, irq affinity can''t be changed. Step to reproduce is as below: 1. xl -f pci-assignable-add 0000:0d:0.0; xl -f pci-assignable-add 0000:1f:0.0 2.xm cr -c vm.cfg [root@rac10box2 ~]# ca...

On Sun, Jan 04, 2015 at 04:38:17PM +0800, Jason Wang wrote: > > On 12/28/2014 03:52 PM, Michael S. Tsirkin wrote: > > On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: > >> Hi all: > >> > >> This series try to share MSIX irq for each tx/rx queue pair. This is > >> done through: > >> > >> - introducing virtio pci channel which are group of virtqueues that > >> sharing a single MSIX irq (Patch 1) > >> - expose channel setting to virtio core api (Patch 2) > >> -...

Jason Wang <jasowang at redhat.com> writes: > Hi all: > > This series try to share MSIX irq for each tx/rx queue pair. This is > done through: > > - introducing virtio pci channel which are group of virtqueues that > sharing a single MSIX irq (Patch 1) > - expose channel setting to virtio core api (Patch 2) > - try to use channel setting in virtio-net (Patch 3) Hi...

On Sun, Jan 04, 2015 at 04:38:17PM +0800, Jason Wang wrote: > > On 12/28/2014 03:52 PM, Michael S. Tsirkin wrote: > > On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote: > >> Hi all: > >> > >> This series try to share MSIX irq for each tx/rx queue pair. This is > >> done through: > >> > >> - introducing virtio pci channel which are group of virtqueues that > >> sharing a single MSIX irq (Patch 1) > >> - expose channel setting to virtio core api (Patch 2) > >> -...

Jason Wang <jasowang at redhat.com> writes: > Hi all: > > This series try to share MSIX irq for each tx/rx queue pair. This is > done through: > > - introducing virtio pci channel which are group of virtqueues that > sharing a single MSIX irq (Patch 1) > - expose channel setting to virtio core api (Patch 2) > - try to use channel setting in virtio-net (Patch 3) Hi...

This patch try to reduce the number of MSIX irqs required for virtio-net by sharing a MSIX irq for each TX/RX queue pair through channels. If transport support channel, about half of the MSIX irqs were reduced. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: Michael S. Tsirkin <mst at redhat.com> Signed-off-by: Jason Wang <j...

This patch try to reduce the number of MSIX irqs required for virtio-net by sharing a MSIX irq for each TX/RX queue pair through channels. If transport support channel, about half of the MSIX irqs were reduced. Cc: Rusty Russell <rusty at rustcorp.com.au> Cc: Michael S. Tsirkin <mst at redhat.com> Signed-off-by: Jason Wang <j...