From: "Wu, Feng" <feng.wu@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
"Zhang, Yang Z" <yang.z.zhang@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@kernel.org>,
"H. Peter Anvin" <hpa@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>, Gleb Natapov <gleb@kernel.org>,
"dwmw2@infradead.org" <dwmw2@infradead.org>,
"joro@8bytes.org" <joro@8bytes.org>,
Alex Williamson <alex.williamson@redhat.com>,
Jiang Liu <jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Cc: "iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
KVM list <kvm@vger.kernel.org>,
Eric Auger <eric.auger@linaro.org>,
"Wu, Feng" <feng.wu@intel.com>
Subject: RE: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI
Date: Mon, 22 Dec 2014 04:48:57 +0000 [thread overview]
Message-ID: <E959C4978C3B6342920538CF579893F0023103FB@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <549576C7.4030800@redhat.com>
> -----Original Message-----
> From: Paolo Bonzini [mailto:paolo.bonzini@gmail.com] On Behalf Of Paolo
> Bonzini
> Sent: Saturday, December 20, 2014 9:17 PM
> To: Wu, Feng; Paolo Bonzini; Zhang, Yang Z; Thomas Gleixner; Ingo Molnar; H.
> Peter Anvin; x86@kernel.org; Gleb Natapov; dwmw2@infradead.org;
> joro@8bytes.org; Alex Williamson; Jiang Liu
> Cc: iommu@lists.linux-foundation.org; linux-kernel@vger.kernel.org; KVM list;
> Eric Auger
> Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for
> VT-d PI
>
>
>
> On 20/12/2014 00:48, Wu, Feng wrote:
> > In my understanding, lowest priority interrupts are always delivered to a
> > Single CPU, we need to find the right destination CPU from the cpumask.
>
> Yes, but which CPU however differs every time the interrupt is
> delivered. So the emulation here is a bit poor. For now, please limit
> PI to fixed interrupts.
Do you mean we don't support Lowest priority interrupts? As I mentioned before,
Lowest priority interrupts is widely used in Linux, so I think supporting lowest priority
interrupts is very important for Linux guest OS. Do you have any ideas/suggestions about
how to support Lowest priority interrupts for PI? Thanks a lot!
Thanks,
Feng
>
> > Actually, we don't support posting broadcast/multicast interrupts, because
> > the interrupt is associated with one Posted-interrupts descriptor, then one
> > vCPU.
>
> Understood.
>
> Paolo
WARNING: multiple messages have this Message-ID (diff)
From: "Wu, Feng" <feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: Paolo Bonzini <pbonzini-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"Zhang,
Yang Z" <yang.z.zhang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"H. Peter Anvin" <hpa-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
"x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Gleb Natapov <gleb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org"
<dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
"joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org"
<joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
Alex Williamson
<alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Jiang Liu
<public-jiang.liu-VuQAYsv1563Yd54FQh9/CA-wOFGN7rlS/M9smdsby/KFg@public.gmane.org>
Cc: "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org"
<iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
KVM list <kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Eric Auger <eric.auger-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: RE: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI
Date: Mon, 22 Dec 2014 04:48:57 +0000 [thread overview]
Message-ID: <E959C4978C3B6342920538CF579893F0023103FB@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <549576C7.4030800-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> -----Original Message-----
> From: Paolo Bonzini [mailto:paolo.bonzini-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org] On Behalf Of Paolo
> Bonzini
> Sent: Saturday, December 20, 2014 9:17 PM
> To: Wu, Feng; Paolo Bonzini; Zhang, Yang Z; Thomas Gleixner; Ingo Molnar; H.
> Peter Anvin; x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org; Gleb Natapov; dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org;
> joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org; Alex Williamson; Jiang Liu
> Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org; linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org; KVM list;
> Eric Auger
> Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for
> VT-d PI
>
>
>
> On 20/12/2014 00:48, Wu, Feng wrote:
> > In my understanding, lowest priority interrupts are always delivered to a
> > Single CPU, we need to find the right destination CPU from the cpumask.
>
> Yes, but which CPU however differs every time the interrupt is
> delivered. So the emulation here is a bit poor. For now, please limit
> PI to fixed interrupts.
Do you mean we don't support Lowest priority interrupts? As I mentioned before,
Lowest priority interrupts is widely used in Linux, so I think supporting lowest priority
interrupts is very important for Linux guest OS. Do you have any ideas/suggestions about
how to support Lowest priority interrupts for PI? Thanks a lot!
Thanks,
Feng
>
> > Actually, we don't support posting broadcast/multicast interrupts, because
> > the interrupt is associated with one Posted-interrupts descriptor, then one
> > vCPU.
>
> Understood.
>
> Paolo
next prev parent reply other threads:[~2014-12-22 4:49 UTC|newest]
Thread overview: 270+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 15:14 [v3 00/26] Add VT-d Posted-Interrupts support Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 01/26] genirq: Introduce irq_set_vcpu_affinity() to target an interrupt to a VCPU Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 02/26] iommu: Add new member capability to struct irq_remap_ops Feng Wu
2015-01-28 15:22 ` David Woodhouse
2015-01-28 15:22 ` David Woodhouse
2015-01-29 8:34 ` Wu, Feng
2015-01-29 8:34 ` Wu, Feng
2014-12-12 15:14 ` [v3 03/26] iommu, x86: Define new irte structure for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2015-01-28 15:26 ` David Woodhouse
2015-01-28 15:26 ` David Woodhouse
2014-12-12 15:14 ` [v3 04/26] iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip Feng Wu
2014-12-12 15:14 ` Feng Wu
2015-01-28 15:26 ` David Woodhouse
2015-01-28 15:26 ` David Woodhouse
2015-01-29 7:55 ` Wu, Feng
2015-01-29 7:55 ` Wu, Feng
2014-12-12 15:14 ` [v3 05/26] x86, irq: Implement irq_set_vcpu_affinity for pci_msi_ir_controller Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 06/26] iommu, x86: No need to migrating irq for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-18 14:26 ` Zhang, Yang Z
2014-12-18 14:26 ` Zhang, Yang Z
2014-12-19 1:40 ` Wu, Feng
2014-12-19 1:40 ` Wu, Feng
2014-12-19 1:46 ` Zhang, Yang Z
2014-12-19 1:46 ` Zhang, Yang Z
2014-12-19 11:59 ` Paolo Bonzini
2014-12-19 11:59 ` Paolo Bonzini
2014-12-23 0:37 ` Zhang, Yang Z
2014-12-23 0:37 ` Zhang, Yang Z
2014-12-23 8:47 ` Paolo Bonzini
2014-12-23 8:47 ` Paolo Bonzini
2014-12-23 9:07 ` Wu, Feng
2014-12-23 9:07 ` Wu, Feng
2014-12-23 9:34 ` Paolo Bonzini
2014-12-23 9:34 ` Paolo Bonzini
2014-12-24 1:38 ` Zhang, Yang Z
2014-12-24 1:38 ` Zhang, Yang Z
2014-12-24 2:12 ` Jiang Liu
2014-12-24 2:12 ` Jiang Liu
2014-12-24 2:32 ` Zhang, Yang Z
2014-12-24 2:32 ` Zhang, Yang Z
2014-12-24 3:08 ` Wu, Feng
2014-12-24 3:08 ` Wu, Feng
2014-12-24 4:04 ` Zhang, Yang Z
2014-12-24 4:04 ` Zhang, Yang Z
2014-12-24 4:54 ` Jiang Liu
2014-12-24 4:54 ` Jiang Liu
2015-01-28 15:29 ` David Woodhouse
2015-01-28 15:29 ` David Woodhouse
2014-12-12 15:14 ` [v3 07/26] iommu, x86: Add cap_pi_support() to detect VT-d PI capability Feng Wu
2015-01-28 15:32 ` David Woodhouse
2015-01-28 15:32 ` David Woodhouse
2014-12-12 15:14 ` [v3 08/26] iommu, x86: Add intel_irq_remapping_capability() for Intel Feng Wu
2015-01-28 15:37 ` David Woodhouse
2015-01-28 15:37 ` David Woodhouse
2015-01-29 8:57 ` Wu, Feng
2015-01-29 8:57 ` Wu, Feng
2014-12-12 15:14 ` [v3 09/26] iommu, x86: define irq_remapping_cap() Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 10/26] KVM: change struct pi_desc for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 11/26] KVM: Add some helper functions for Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 12/26] KVM: Initialize VT-d Posted-Interrupts Descriptor Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-18 15:19 ` Zhang, Yang Z
2014-12-18 15:19 ` Zhang, Yang Z
2014-12-12 15:14 ` [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-18 14:49 ` Zhang, Yang Z
2014-12-18 14:49 ` Zhang, Yang Z
2014-12-18 16:58 ` Paolo Bonzini
2014-12-18 16:58 ` Paolo Bonzini
2014-12-19 1:13 ` Zhang, Yang Z
2014-12-19 1:30 ` Wu, Feng
2014-12-19 1:30 ` Wu, Feng
2014-12-19 1:30 ` Wu, Feng
2014-12-19 1:30 ` Wu, Feng
2014-12-19 1:47 ` Zhang, Yang Z
2014-12-19 1:47 ` Zhang, Yang Z
2014-12-19 11:59 ` Paolo Bonzini
2014-12-19 11:59 ` Paolo Bonzini
2014-12-19 23:48 ` Wu, Feng
2014-12-19 23:48 ` Wu, Feng
2014-12-20 13:16 ` Paolo Bonzini
2014-12-20 13:16 ` Paolo Bonzini
2014-12-22 4:48 ` Wu, Feng [this message]
2014-12-22 4:48 ` Wu, Feng
2014-12-22 9:27 ` Paolo Bonzini
2014-12-22 9:27 ` Paolo Bonzini
2014-12-22 11:04 ` Wu, Feng
2014-12-22 11:04 ` Wu, Feng
2014-12-22 11:06 ` Paolo Bonzini
2014-12-22 11:06 ` Paolo Bonzini
2014-12-22 11:17 ` Wu, Feng
2014-12-22 11:17 ` Wu, Feng
2014-12-22 11:23 ` Paolo Bonzini
2014-12-22 11:23 ` Paolo Bonzini
2014-12-22 14:13 ` Yong Wang
2014-12-22 14:13 ` Yong Wang
2015-01-09 14:54 ` Radim Krčmář
2015-01-09 14:56 ` Paolo Bonzini
2015-01-09 15:12 ` Radim Krčmář
2015-01-09 15:18 ` Paolo Bonzini
2015-01-09 15:47 ` Radim Krčmář
2015-01-13 0:27 ` Wu, Feng
2015-01-13 0:27 ` Wu, Feng
2015-01-13 16:17 ` Radim Kr?má?
2015-01-14 1:27 ` Wu, Feng
2015-01-14 1:27 ` Wu, Feng
2015-01-14 13:02 ` Paolo Bonzini
2015-01-14 13:02 ` Paolo Bonzini
2015-01-14 16:59 ` Radim Kr?má?
2015-01-14 16:59 ` Radim Kr?má?
2015-01-20 21:04 ` Nadav Amit
2015-01-20 21:04 ` Nadav Amit
2015-01-21 21:16 ` Radim Kr?má?
2015-01-21 21:16 ` Radim Kr?má?
2014-12-12 15:14 ` [v3 14/26] KVM: Get Posted-Interrupts descriptor address from struct kvm_vcpu Feng Wu
2014-12-12 15:14 ` [v3 15/26] KVM: add interfaces to control PI outside vmx Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 16/26] KVM: Make struct kvm_irq_routing_table accessible Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-17 16:17 ` Paolo Bonzini
2014-12-17 16:17 ` Paolo Bonzini
2014-12-19 2:19 ` Wu, Feng
2014-12-19 2:19 ` Wu, Feng
2014-12-19 11:59 ` Paolo Bonzini
2014-12-19 11:59 ` Paolo Bonzini
2014-12-19 23:39 ` Wu, Feng
2014-12-19 23:39 ` Wu, Feng
2014-12-12 15:14 ` [v3 17/26] KVM: make kvm_set_msi_irq() public Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-17 17:32 ` Paolo Bonzini
2014-12-17 17:32 ` Paolo Bonzini
2014-12-12 15:14 ` [v3 18/26] KVM: kvm-vfio: User API for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 19/26] KVM: kvm-vfio: implement the VFIO skeleton " Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 20/26] KVM: x86: kvm-vfio: VT-d posted-interrupts setup Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 21/26] x86, irq: Define a global vector for VT-d Posted-Interrupts Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-18 14:54 ` Zhang, Yang Z
2014-12-18 14:54 ` Zhang, Yang Z
2014-12-19 0:52 ` Wu, Feng
2014-12-19 0:52 ` Wu, Feng
2015-01-30 18:18 ` H. Peter Anvin
2015-01-30 18:18 ` H. Peter Anvin
2015-02-02 1:06 ` Wu, Feng
2015-02-02 1:06 ` Wu, Feng
2015-02-23 22:04 ` Marcelo Tosatti
2015-02-23 22:04 ` Marcelo Tosatti
2014-12-12 15:14 ` [v3 22/26] KVM: Define a wakeup worker thread for vCPU Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-12 15:14 ` [v3 23/26] KVM: Update Posted-Interrupts Descriptor when vCPU is preempted Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-17 17:11 ` Paolo Bonzini
2014-12-17 17:11 ` Paolo Bonzini
2014-12-18 3:15 ` Wu, Feng
2014-12-18 3:15 ` Wu, Feng
2014-12-18 8:32 ` Paolo Bonzini
2014-12-18 8:32 ` Paolo Bonzini
2014-12-19 2:09 ` Wu, Feng
2014-12-19 2:09 ` Wu, Feng
2014-12-19 2:09 ` Wu, Feng
2015-02-23 22:21 ` Marcelo Tosatti
2015-02-23 22:21 ` Marcelo Tosatti
2015-03-02 9:12 ` Wu, Feng
2015-03-02 9:12 ` Wu, Feng
2014-12-12 15:14 ` [v3 24/26] KVM: Update Posted-Interrupts Descriptor when vCPU is blocked Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-17 17:09 ` Paolo Bonzini
2014-12-17 17:09 ` Paolo Bonzini
2014-12-18 3:16 ` Wu, Feng
2014-12-18 3:16 ` Wu, Feng
2014-12-18 8:37 ` Paolo Bonzini
2014-12-18 8:37 ` Paolo Bonzini
2014-12-19 2:51 ` Wu, Feng
2014-12-19 2:51 ` Wu, Feng
2014-12-19 2:51 ` Wu, Feng
2015-02-25 21:50 ` Marcelo Tosatti
2015-02-26 8:08 ` Wu, Feng
2015-02-26 23:41 ` Marcelo Tosatti
2015-02-26 23:41 ` Marcelo Tosatti
2015-02-26 23:40 ` Marcelo Tosatti
2015-02-26 23:40 ` Marcelo Tosatti
2015-03-02 13:36 ` Wu, Feng
2015-03-02 13:36 ` Wu, Feng
2015-03-04 12:06 ` Marcelo Tosatti
2015-03-06 6:51 ` Wu, Feng
2015-03-06 6:51 ` Wu, Feng
2015-03-12 1:15 ` Marcelo Tosatti
2015-03-16 11:42 ` Wu, Feng
2015-03-16 11:42 ` Wu, Feng
2015-03-25 23:17 ` Marcelo Tosatti
2015-03-25 23:17 ` Marcelo Tosatti
2015-03-27 6:34 ` Wu, Feng
2015-03-27 6:34 ` Wu, Feng
2015-03-27 19:30 ` Marcelo Tosatti
2015-03-30 4:46 ` Wu, Feng
2015-03-30 4:46 ` Wu, Feng
2015-03-30 23:55 ` Marcelo Tosatti
2015-03-31 1:13 ` Wu, Feng
2015-04-14 7:37 ` Wu, Feng
2015-06-05 21:59 ` Marcelo Tosatti
2015-06-08 1:43 ` Wu, Feng
2014-12-12 15:14 ` [v3 25/26] KVM: Suppress posted-interrupt when 'SN' is set Feng Wu
2014-12-12 15:14 ` Feng Wu
2014-12-17 17:42 ` Paolo Bonzini
2014-12-17 17:42 ` Paolo Bonzini
2014-12-17 17:42 ` Paolo Bonzini
2014-12-17 17:42 ` Paolo Bonzini
2014-12-18 3:14 ` Wu, Feng
2014-12-18 3:14 ` Wu, Feng
2014-12-18 8:38 ` Paolo Bonzini
2014-12-18 8:38 ` Paolo Bonzini
2014-12-18 15:09 ` Zhang, Yang Z
2014-12-18 15:09 ` Zhang, Yang Z
2014-12-19 2:58 ` Wu, Feng
2014-12-19 2:58 ` Wu, Feng
2014-12-19 2:58 ` Wu, Feng
2014-12-19 3:32 ` Zhang, Yang Z
2014-12-19 3:32 ` Zhang, Yang Z
2014-12-19 3:32 ` Zhang, Yang Z
2014-12-19 4:34 ` Wu, Feng
2014-12-19 4:34 ` Wu, Feng
2014-12-19 4:34 ` Wu, Feng
2014-12-19 4:44 ` Zhang, Yang Z
2014-12-19 4:44 ` Zhang, Yang Z
2014-12-19 4:44 ` Zhang, Yang Z
2014-12-19 4:49 ` Wu, Feng
2014-12-19 4:49 ` Wu, Feng
2014-12-19 4:49 ` Wu, Feng
2014-12-19 5:25 ` Zhang, Yang Z
2014-12-19 5:25 ` Zhang, Yang Z
2014-12-19 5:25 ` Zhang, Yang Z
2014-12-19 5:46 ` Wu, Feng
2014-12-19 5:46 ` Wu, Feng
2014-12-19 5:46 ` Wu, Feng
2014-12-19 7:04 ` Zhang, Yang Z
2014-12-19 7:04 ` Zhang, Yang Z
2014-12-19 12:00 ` Paolo Bonzini
2014-12-19 12:00 ` Paolo Bonzini
2014-12-19 23:34 ` Wu, Feng
2014-12-19 23:34 ` Wu, Feng
2014-12-12 15:15 ` [v3 26/26] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts Feng Wu
2014-12-12 15:15 ` Feng Wu
2015-01-28 15:39 ` David Woodhouse
2015-01-28 15:39 ` David Woodhouse
2014-12-16 9:04 ` [v3 00/26] Add VT-d Posted-Interrupts support Wu, Feng
2015-01-06 1:10 ` Wu, Feng
2015-01-06 1:10 ` Wu, Feng
2015-01-09 12:46 ` joro
2015-01-09 13:58 ` Wu, Feng
2015-01-21 2:25 ` Wu, Feng
2015-01-21 2:25 ` Wu, Feng
2015-01-28 3:01 ` Wu, Feng
2015-01-28 3:01 ` Wu, Feng
2015-01-28 3:44 ` Alex Williamson
2015-01-28 3:44 ` Alex Williamson
2015-01-28 4:44 ` Wu, Feng
2015-01-28 4:44 ` Wu, Feng
2014-12-22 16:37 [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI Paolo Bonzini
2014-12-23 0:46 ` Zhang, Yang Z
2014-12-23 0:46 ` Zhang, Yang Z
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