From: Paolo Bonzini <pbonzini@redhat.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
Paul Mackerras <paulus@samba.org>,
Christoffer Dall <c.dall@virtualopensystems.com>,
Alexander Graf <agraf@suse.de>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
kvm-ppc <kvm-ppc@vger.kernel.org>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [kvmarm] [RFC PATCH 0/3] KVM: ARM: Get rid of hardcoded VGIC addresses
Date: Fri, 26 Oct 2012 10:40:14 +0000 [thread overview]
Message-ID: <508A688E.6090508@redhat.com> (raw)
In-Reply-To: <1351247838.12271.10.camel@pasglop>
Il 26/10/2012 12:37, Benjamin Herrenschmidt ha scritto:
>> > Wiring which MSI-X interrupts go to which source controllers. If you
>> > have one source controller per PCI bridge, you need to tell the kernel
>> > the mapping between MSI messages interrupts and PCI bridges, and update
>> > it whenever the MSI masking changes.
> Not sure I get it. Are you talking in the context of PCI pass-through ?
Not just that, it's also for emulated devices that do MSI-X (virtio-pci
does).
> > The other problem is configuring the redirection table. If you need >64
> > sources you need ioctls like KVM_GET/SET_IRQCHIP_ONE_REG.
> Well, all of that is totally specific to the IO-APIC design &
> limitations as far as I can tell. What is the "redirection table" ?
The wiring between source and presentation controllers, roughly. I
suppose that's what Paul referred to when he said there's 64 bits of
config info per source in the source controllers.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
Paul Mackerras <paulus@samba.org>,
Christoffer Dall <c.dall@virtualopensystems.com>,
Alexander Graf <agraf@suse.de>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
kvm-ppc <kvm-ppc@vger.kernel.org>,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [kvmarm] [RFC PATCH 0/3] KVM: ARM: Get rid of hardcoded VGIC addresses
Date: Fri, 26 Oct 2012 12:40:14 +0200 [thread overview]
Message-ID: <508A688E.6090508@redhat.com> (raw)
In-Reply-To: <1351247838.12271.10.camel@pasglop>
Il 26/10/2012 12:37, Benjamin Herrenschmidt ha scritto:
>> > Wiring which MSI-X interrupts go to which source controllers. If you
>> > have one source controller per PCI bridge, you need to tell the kernel
>> > the mapping between MSI messages interrupts and PCI bridges, and update
>> > it whenever the MSI masking changes.
> Not sure I get it. Are you talking in the context of PCI pass-through ?
Not just that, it's also for emulated devices that do MSI-X (virtio-pci
does).
> > The other problem is configuring the redirection table. If you need >64
> > sources you need ioctls like KVM_GET/SET_IRQCHIP_ONE_REG.
> Well, all of that is totally specific to the IO-APIC design &
> limitations as far as I can tell. What is the "redirection table" ?
The wiring between source and presentation controllers, roughly. I
suppose that's what Paul referred to when he said there's 64 bits of
config info per source in the source controllers.
Paolo
next prev parent reply other threads:[~2012-10-26 10:40 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-14 0:04 [RFC PATCH 0/3] KVM: ARM: Get rid of hardcoded VGIC addresses Christoffer Dall
2012-10-14 0:04 ` [RFC PATCH 1/3] KVM: ARM: Introduce KVM_INIT_IRQCHIP ioctl Christoffer Dall
2012-10-17 20:21 ` Peter Maydell
2012-10-17 20:23 ` Christoffer Dall
2012-10-17 20:31 ` Peter Maydell
2012-10-17 20:39 ` Christoffer Dall
2012-10-18 12:20 ` Avi Kivity
2012-10-19 18:42 ` Christoffer Dall
2012-10-14 0:04 ` [RFC PATCH 2/3] KVM: ARM: Introduce KVM_SET_DEVICE_ADDRESS ioctl Christoffer Dall
2012-10-17 20:29 ` Peter Maydell
2012-10-19 18:46 ` Christoffer Dall
2012-10-19 20:24 ` Peter Maydell
2012-10-19 20:27 ` Christoffer Dall
2012-10-19 20:33 ` Christoffer Dall
2012-10-14 0:04 ` [RFC PATCH 3/3] KVM: ARM: Split KVM_CREATE_IRQCHIP and KVM_INIT_IRQCHIP Christoffer Dall
2012-10-18 11:15 ` Peter Maydell
2012-10-17 20:38 ` [kvmarm] [RFC PATCH 0/3] KVM: ARM: Get rid of hardcoded VGIC addresses Alexander Graf
2012-10-17 20:38 ` Alexander Graf
2012-10-17 20:39 ` Christoffer Dall
2012-10-17 20:39 ` Christoffer Dall
2012-10-17 21:19 ` Benjamin Herrenschmidt
2012-10-17 21:19 ` Benjamin Herrenschmidt
2012-10-17 22:10 ` Paul Mackerras
2012-10-17 22:10 ` Paul Mackerras
2012-10-17 23:58 ` Benjamin Herrenschmidt
2012-10-17 23:58 ` Benjamin Herrenschmidt
2012-10-18 13:48 ` Christoffer Dall
2012-10-18 13:48 ` Christoffer Dall
2012-10-18 13:49 ` Alexander Graf
2012-10-18 13:49 ` Alexander Graf
2012-10-18 15:25 ` Avi Kivity
2012-10-18 15:25 ` Avi Kivity
2012-10-23 10:48 ` Jan Kiszka
2012-10-23 10:48 ` Jan Kiszka
2012-10-23 10:52 ` Peter Maydell
2012-10-23 10:52 ` Peter Maydell
2012-10-23 11:00 ` Jan Kiszka
2012-10-23 11:00 ` Jan Kiszka
2012-10-23 11:04 ` Peter Maydell
2012-10-23 11:04 ` Peter Maydell
2012-10-23 11:08 ` Jan Kiszka
2012-10-23 11:08 ` Jan Kiszka
2012-10-24 0:50 ` Paul Mackerras
2012-10-24 0:50 ` Paul Mackerras
2012-10-25 11:57 ` Jan Kiszka
2012-10-25 11:57 ` Jan Kiszka
2012-10-25 16:14 ` Paolo Bonzini
2012-10-25 16:14 ` Paolo Bonzini
2012-10-25 16:32 ` Jan Kiszka
2012-10-25 16:32 ` Jan Kiszka
2012-10-25 18:27 ` Paolo Bonzini
2012-10-25 18:27 ` Paolo Bonzini
2012-10-25 19:40 ` Benjamin Herrenschmidt
2012-10-25 19:40 ` Benjamin Herrenschmidt
2012-10-26 9:58 ` Paolo Bonzini
2012-10-26 9:58 ` Paolo Bonzini
2012-10-26 10:09 ` Peter Maydell
2012-10-26 10:09 ` Peter Maydell
2012-10-26 10:15 ` Paolo Bonzini
2012-10-26 10:15 ` Paolo Bonzini
2012-10-26 10:22 ` Jan Kiszka
2012-10-26 10:22 ` Jan Kiszka
2012-10-26 10:44 ` Benjamin Herrenschmidt
2012-10-26 10:44 ` Benjamin Herrenschmidt
2012-10-26 11:00 ` Jan Kiszka
2012-10-26 11:00 ` Jan Kiszka
2012-10-26 11:09 ` Benjamin Herrenschmidt
2012-10-26 11:09 ` Benjamin Herrenschmidt
2012-10-26 11:57 ` Paolo Bonzini
2012-10-26 11:57 ` Paolo Bonzini
2012-10-26 12:08 ` Peter Maydell
2012-10-26 12:08 ` Peter Maydell
2012-10-26 12:41 ` Jan Kiszka
2012-10-26 12:41 ` Jan Kiszka
2012-10-26 20:21 ` Benjamin Herrenschmidt
2012-10-26 20:21 ` Benjamin Herrenschmidt
2012-10-26 11:17 ` Peter Maydell
2012-10-26 11:17 ` Peter Maydell
2012-10-26 11:39 ` Benjamin Herrenschmidt
2012-10-26 11:39 ` Benjamin Herrenschmidt
2012-10-26 12:39 ` Jan Kiszka
2012-10-26 12:39 ` Jan Kiszka
2012-10-26 20:45 ` Benjamin Herrenschmidt
2012-10-26 20:45 ` Benjamin Herrenschmidt
2012-10-26 22:03 ` Benjamin Herrenschmidt
2012-10-26 22:03 ` Benjamin Herrenschmidt
2012-10-27 8:06 ` Jan Kiszka
2012-10-27 8:06 ` Jan Kiszka
2012-10-27 10:01 ` Peter Maydell
2012-10-27 10:01 ` Peter Maydell
2012-10-28 22:19 ` Benjamin Herrenschmidt
2012-10-28 22:19 ` Benjamin Herrenschmidt
2012-10-26 10:37 ` Benjamin Herrenschmidt
2012-10-26 10:37 ` Benjamin Herrenschmidt
2012-10-26 10:40 ` Paolo Bonzini [this message]
2012-10-26 10:40 ` Paolo Bonzini
2012-10-26 10:47 ` Benjamin Herrenschmidt
2012-10-26 10:47 ` Benjamin Herrenschmidt
2012-10-26 11:47 ` Paolo Bonzini
2012-10-26 11:47 ` Paolo Bonzini
2012-10-25 19:39 ` Benjamin Herrenschmidt
2012-10-25 19:39 ` Benjamin Herrenschmidt
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