From: Paolo Bonzini <pbonzini@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Paul Mackerras <paulus@samba.org>,
Christoffer Dall <c.dall@virtualopensystems.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
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: Thu, 25 Oct 2012 18:27:05 +0000 [thread overview]
Message-ID: <50898479.8060402@redhat.com> (raw)
In-Reply-To: <5089699D.3050004@siemens.com>
Il 25/10/2012 18:32, Jan Kiszka ha scritto:
> For wiring things together, I agree. But the IOAPIC has a fixed number
> of input lines per chip, Power needs to configure them. I don't think
> deriving this from addressed lines is the best solution. Some lines may
> be configured (too) late, when the chip should have defined its
> configuration already.
Sure, I was replying to this only: "Configuration of each source fits
into 64 bits, so if we tried to use KVM_SET_IRQCHIP for configuring a
source controller we'd be limited to 64 interrupts per source
controller" (I figure 64 is the size of the KVM_SET_IRQCHIP union / 64
bits per entry).
Probably you do need a variant of KVM_CREATE_IRQCHIP to create the
IOAPICs/source controllers (Paul's proposal at
http://permalink.gmane.org/gmane.comp.emulators.kvm.powerpc.devel/5674
for example), assign chip ids to them, set the number of input lines,
etc. but the configuration should work well with the existing ioctls,
with no limit on the number of sources.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Paul Mackerras <paulus@samba.org>,
Christoffer Dall <c.dall@virtualopensystems.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
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: Thu, 25 Oct 2012 20:27:05 +0200 [thread overview]
Message-ID: <50898479.8060402@redhat.com> (raw)
In-Reply-To: <5089699D.3050004@siemens.com>
Il 25/10/2012 18:32, Jan Kiszka ha scritto:
> For wiring things together, I agree. But the IOAPIC has a fixed number
> of input lines per chip, Power needs to configure them. I don't think
> deriving this from addressed lines is the best solution. Some lines may
> be configured (too) late, when the chip should have defined its
> configuration already.
Sure, I was replying to this only: "Configuration of each source fits
into 64 bits, so if we tried to use KVM_SET_IRQCHIP for configuring a
source controller we'd be limited to 64 interrupts per source
controller" (I figure 64 is the size of the KVM_SET_IRQCHIP union / 64
bits per entry).
Probably you do need a variant of KVM_CREATE_IRQCHIP to create the
IOAPICs/source controllers (Paul's proposal at
http://permalink.gmane.org/gmane.comp.emulators.kvm.powerpc.devel/5674
for example), assign chip ids to them, set the number of input lines,
etc. but the configuration should work well with the existing ioctls,
with no limit on the number of sources.
Paolo
next prev parent reply other threads:[~2012-10-25 18:27 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 [this message]
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
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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