From: Feng Wu <feng.wu@intel.com> To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, gleb@kernel.org, pbonzini@redhat.com, dwmw2@infradead.org, joro@8bytes.org, alex.williamson@redhat.com, jiang.liu@linux.intel.com Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, kvm@vger.kernel.org, Feng Wu <feng.wu@intel.com> Subject: [v2 17/25] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Date: Wed, 3 Dec 2014 15:39:46 +0800 [thread overview] Message-ID: <1417592394-24343-18-git-send-email-feng.wu@intel.com> (raw) In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu@intel.com> This patch adds and documents a new attribute KVM_DEV_VFIO_DEVICE_POSTING_IRQ in KVM_DEV_VFIO_DEVICE group. This new attribute is used for VT-d Posted-Interrupts. When guest OS changes the interrupt configuration for an assigned device, such as, MSI/MSIx data/address fields, QEMU will use this IRQ attribute to tell KVM to update the related IRTE according the VT-d Posted-Interrrupts Specification, such as, the guest vector should be updated in the related IRTE. Signed-off-by: Feng Wu <feng.wu@intel.com> --- Documentation/virtual/kvm/devices/vfio.txt | 9 +++++++++ include/uapi/linux/kvm.h | 10 ++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/Documentation/virtual/kvm/devices/vfio.txt b/Documentation/virtual/kvm/devices/vfio.txt index f7aff29..41e12b7 100644 --- a/Documentation/virtual/kvm/devices/vfio.txt +++ b/Documentation/virtual/kvm/devices/vfio.txt @@ -42,3 +42,12 @@ activated before VFIO_DEVICE_SET_IRQS has been called to trigger the IRQ or associate an eventfd to it. Unforwarding can only be called while the signaling has been disabled with VFIO_DEVICE_SET_IRQS. If this condition is not satisfied, the command returns an -EBUSY. + + KVM_DEV_VFIO_DEVICE_POSTING_IRQ: Use posted interrtups mechanism to post + the IRQ to guests. +For this attribute, kvm_device_attr.addr points to a kvm_vfio_dev_irq struct. + +When guest OS changes the interrupt configuration for an assigned device, +such as, MSI/MSIx data/address fields, QEMU will use this IRQ attribute +to tell KVM to update the related IRTE according the VT-d Posted-Interrrupts +Specification, such as, the guest vector should be updated in the related IRTE. diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index a269a42..7d98650 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -949,6 +949,7 @@ struct kvm_device_attr { #define KVM_DEV_VFIO_DEVICE 2 #define KVM_DEV_VFIO_DEVICE_FORWARD_IRQ 1 #define KVM_DEV_VFIO_DEVICE_UNFORWARD_IRQ 2 +#define KVM_DEV_VFIO_DEVICE_POSTING_IRQ 3 enum kvm_device_type { KVM_DEV_TYPE_FSL_MPIC_20 = 1, @@ -973,6 +974,15 @@ struct kvm_arch_forwarded_irq { __u32 gsi; /* gsi, ie. virtual IRQ number */ }; +struct kvm_vfio_dev_irq { + __u32 argsz; + __u32 fd; /* file descriptor of the VFIO device */ + __u32 index; /* VFIO device IRQ index */ + __u32 start; + __u32 count; + __u32 gsi[]; /* gsi, ie. virtual IRQ number */ +}; + /* * ioctls for VM fds */ -- 1.7.1
WARNING: multiple messages have this Message-ID (diff)
From: Feng Wu <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> To: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: [v2 17/25] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Date: Wed, 3 Dec 2014 15:39:46 +0800 [thread overview] Message-ID: <1417592394-24343-18-git-send-email-feng.wu@intel.com> (raw) In-Reply-To: <1417592394-24343-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> This patch adds and documents a new attribute KVM_DEV_VFIO_DEVICE_POSTING_IRQ in KVM_DEV_VFIO_DEVICE group. This new attribute is used for VT-d Posted-Interrupts. When guest OS changes the interrupt configuration for an assigned device, such as, MSI/MSIx data/address fields, QEMU will use this IRQ attribute to tell KVM to update the related IRTE according the VT-d Posted-Interrrupts Specification, such as, the guest vector should be updated in the related IRTE. Signed-off-by: Feng Wu <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> --- Documentation/virtual/kvm/devices/vfio.txt | 9 +++++++++ include/uapi/linux/kvm.h | 10 ++++++++++ 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/Documentation/virtual/kvm/devices/vfio.txt b/Documentation/virtual/kvm/devices/vfio.txt index f7aff29..41e12b7 100644 --- a/Documentation/virtual/kvm/devices/vfio.txt +++ b/Documentation/virtual/kvm/devices/vfio.txt @@ -42,3 +42,12 @@ activated before VFIO_DEVICE_SET_IRQS has been called to trigger the IRQ or associate an eventfd to it. Unforwarding can only be called while the signaling has been disabled with VFIO_DEVICE_SET_IRQS. If this condition is not satisfied, the command returns an -EBUSY. + + KVM_DEV_VFIO_DEVICE_POSTING_IRQ: Use posted interrtups mechanism to post + the IRQ to guests. +For this attribute, kvm_device_attr.addr points to a kvm_vfio_dev_irq struct. + +When guest OS changes the interrupt configuration for an assigned device, +such as, MSI/MSIx data/address fields, QEMU will use this IRQ attribute +to tell KVM to update the related IRTE according the VT-d Posted-Interrrupts +Specification, such as, the guest vector should be updated in the related IRTE. diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index a269a42..7d98650 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -949,6 +949,7 @@ struct kvm_device_attr { #define KVM_DEV_VFIO_DEVICE 2 #define KVM_DEV_VFIO_DEVICE_FORWARD_IRQ 1 #define KVM_DEV_VFIO_DEVICE_UNFORWARD_IRQ 2 +#define KVM_DEV_VFIO_DEVICE_POSTING_IRQ 3 enum kvm_device_type { KVM_DEV_TYPE_FSL_MPIC_20 = 1, @@ -973,6 +974,15 @@ struct kvm_arch_forwarded_irq { __u32 gsi; /* gsi, ie. virtual IRQ number */ }; +struct kvm_vfio_dev_irq { + __u32 argsz; + __u32 fd; /* file descriptor of the VFIO device */ + __u32 index; /* VFIO device IRQ index */ + __u32 start; + __u32 count; + __u32 gsi[]; /* gsi, ie. virtual IRQ number */ +}; + /* * ioctls for VM fds */ -- 1.7.1
next prev parent reply other threads:[~2014-12-03 7:50 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-12-03 7:39 [v2 00/25] Add VT-d Posted-Interrupts support Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 01/25] genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 02/25] iommu: Add new member capability to struct irq_remap_ops Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 03/25] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 04/25] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 05/25] x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 06/25] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 07/25] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 08/25] iommu, x86: Add intel_irq_remapping_capability() for Intel Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 09/25] iommu, x86: define irq_remapping_cap() Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 10/25] KVM: change struct pi_desc for VT-d Posted-Interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 11/25] KVM: Add some helper functions for Posted-Interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 12/25] KVM: Initialize VT-d Posted-Interrupts Descriptor Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 13/25] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 14/25] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 15/25] KVM: Make struct kvm_irq_routing_table accessible Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 16/25] KVM: make kvm_set_msi_irq() public Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` Feng Wu [this message] 2014-12-03 7:39 ` [v2 17/25] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Feng Wu 2014-12-04 14:04 ` Eric Auger 2014-12-04 14:04 ` Eric Auger 2014-12-08 4:58 ` Wu, Feng 2014-12-08 4:58 ` Wu, Feng 2014-12-08 5:21 ` Alex Williamson 2014-12-08 5:21 ` Alex Williamson 2014-12-09 11:38 ` Wu, Feng 2014-12-09 11:38 ` Wu, Feng 2014-12-11 5:55 ` Wu, Feng 2014-12-11 5:55 ` Wu, Feng 2014-12-11 15:45 ` Alex Williamson 2014-12-11 15:45 ` Alex Williamson 2014-12-03 7:39 ` [v2 18/25] KVM: kvm-vfio: implement the VFIO skeleton " Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-04 15:35 ` Eric Auger 2014-12-04 15:35 ` Eric Auger 2014-12-08 4:58 ` Wu, Feng 2014-12-08 4:58 ` Wu, Feng 2014-12-08 5:12 ` Alex Williamson 2014-12-08 5:12 ` Alex Williamson 2014-12-08 10:15 ` Eric Auger 2014-12-08 10:15 ` Eric Auger 2014-12-09 11:51 ` Wu, Feng 2014-12-09 11:51 ` Wu, Feng 2014-12-03 7:39 ` [v2 19/25] KVM: x86: kvm-vfio: VT-d posted-interrupts setup Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 20/25] x86, irq: Define a global vector for VT-d Posted-Interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 21/25] KVM: Update Posted-Interrupts descriptor during vCPU scheduling Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 22/25] KVM: Change NDST field after " Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 23/25] KVM: Add the handler for Wake-up Vector Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 24/25] KVM: Suppress posted-interrupt when 'SN' is set Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-03 7:39 ` [v2 25/25] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Feng Wu 2014-12-03 7:39 ` Feng Wu 2014-12-08 13:36 ` [v2 00/25] Add VT-d Posted-Interrupts support Wu, Feng 2014-12-08 13:36 ` Wu, Feng
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