From: Marc Zyngier <marc.zyngier@arm.com>
To: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Jintack Lim <jintack@cs.columbia.edu>,
pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk,
catalin.marinas@arm.com, will.deacon@arm.com,
andre.przywara@arm.com, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
Peter Maydell <peter.maydell@linaro.org>
Subject: Re: [RFC v2 05/10] KVM: arm/arm64: Initialize the emulated EL1 physical timer
Date: Wed, 1 Feb 2017 10:08:01 +0000 [thread overview]
Message-ID: <619cc856-b268-df3b-d064-e511fa54afe0@arm.com> (raw)
In-Reply-To: <20170130190450.GF16459@cbox>
On 30/01/17 19:04, Christoffer Dall wrote:
> On Mon, Jan 30, 2017 at 05:44:20PM +0000, Marc Zyngier wrote:
>> Wventually, we'll have to support an offset-able
>> physical counter to support nested virtualization, but this can come at
>> a later time.
>>
> Why do we need the offset-able physical counter for nested
> virtualization? I would think for nested virt we just need to support
> respecting how the guest hypervisor programs CNTVOFF?
Ah, I see what you mean. Yes, once the guest hypervisor is in control of
its own CNTVOFF, we get everything we need. So let's just ignore this
for the time being, and we should be pretty good for this series.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <marc.zyngier@arm.com>
To: Christoffer Dall <christoffer.dall@linaro.org>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
catalin.marinas@arm.com, will.deacon@arm.com,
linux@armlinux.org.uk, kvmarm@lists.cs.columbia.edu,
andre.przywara@arm.com, pbonzini@redhat.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC v2 05/10] KVM: arm/arm64: Initialize the emulated EL1 physical timer
Date: Wed, 1 Feb 2017 10:08:01 +0000 [thread overview]
Message-ID: <619cc856-b268-df3b-d064-e511fa54afe0@arm.com> (raw)
In-Reply-To: <20170130190450.GF16459@cbox>
On 30/01/17 19:04, Christoffer Dall wrote:
> On Mon, Jan 30, 2017 at 05:44:20PM +0000, Marc Zyngier wrote:
>> Wventually, we'll have to support an offset-able
>> physical counter to support nested virtualization, but this can come at
>> a later time.
>>
> Why do we need the offset-able physical counter for nested
> virtualization? I would think for nested virt we just need to support
> respecting how the guest hypervisor programs CNTVOFF?
Ah, I see what you mean. Yes, once the guest hypervisor is in control of
its own CNTVOFF, we get everything we need. So let's just ignore this
for the time being, and we should be pretty good for this series.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC v2 05/10] KVM: arm/arm64: Initialize the emulated EL1 physical timer
Date: Wed, 1 Feb 2017 10:08:01 +0000 [thread overview]
Message-ID: <619cc856-b268-df3b-d064-e511fa54afe0@arm.com> (raw)
In-Reply-To: <20170130190450.GF16459@cbox>
On 30/01/17 19:04, Christoffer Dall wrote:
> On Mon, Jan 30, 2017 at 05:44:20PM +0000, Marc Zyngier wrote:
>> Wventually, we'll have to support an offset-able
>> physical counter to support nested virtualization, but this can come at
>> a later time.
>>
> Why do we need the offset-able physical counter for nested
> virtualization? I would think for nested virt we just need to support
> respecting how the guest hypervisor programs CNTVOFF?
Ah, I see what you mean. Yes, once the guest hypervisor is in control of
its own CNTVOFF, we get everything we need. So let's just ignore this
for the time being, and we should be pretty good for this series.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2017-02-01 10:08 UTC|newest]
Thread overview: 127+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-27 1:04 [RFC v2 00/10] Provide the EL1 physical timer to the VM Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 01/10] KVM: arm/arm64: Abstract virtual timer context into separate structure Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-29 11:44 ` Marc Zyngier
2017-01-29 11:44 ` Marc Zyngier
2017-01-29 11:44 ` Marc Zyngier
2017-01-27 1:04 ` [RFC v2 02/10] KVM: arm/arm64: Move cntvoff to each timer context Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-29 11:54 ` Marc Zyngier
2017-01-29 11:54 ` Marc Zyngier
2017-01-29 11:54 ` Marc Zyngier
2017-01-30 14:45 ` Christoffer Dall
2017-01-30 14:45 ` Christoffer Dall
2017-01-30 14:45 ` Christoffer Dall
2017-01-30 14:51 ` Marc Zyngier
2017-01-30 14:51 ` Marc Zyngier
2017-01-30 14:51 ` Marc Zyngier
2017-01-30 17:40 ` Jintack Lim
2017-01-30 17:40 ` Jintack Lim
2017-01-30 17:40 ` Jintack Lim
2017-01-30 17:58 ` Jintack Lim
2017-01-30 17:58 ` Jintack Lim
2017-01-30 17:58 ` Jintack Lim
2017-01-30 18:05 ` Marc Zyngier
2017-01-30 18:05 ` Marc Zyngier
2017-01-30 18:05 ` Marc Zyngier
2017-01-30 18:45 ` Jintack Lim
2017-01-30 18:45 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 03/10] KVM: arm/arm64: Decouple kvm timer functions from virtual timer Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-29 12:01 ` Marc Zyngier
2017-01-29 12:01 ` Marc Zyngier
2017-01-29 12:01 ` Marc Zyngier
2017-01-30 17:17 ` Jintack Lim
2017-01-30 17:17 ` Jintack Lim
2017-01-30 14:49 ` Christoffer Dall
2017-01-30 14:49 ` Christoffer Dall
2017-01-30 14:49 ` Christoffer Dall
2017-01-30 17:18 ` Jintack Lim
2017-01-30 17:18 ` Jintack Lim
2017-01-30 17:18 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 04/10] KVM: arm/arm64: Add the EL1 physical timer context Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 05/10] KVM: arm/arm64: Initialize the emulated EL1 physical timer Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-29 12:07 ` Marc Zyngier
2017-01-29 12:07 ` Marc Zyngier
2017-01-29 12:07 ` Marc Zyngier
2017-01-30 14:58 ` Christoffer Dall
2017-01-30 14:58 ` Christoffer Dall
2017-01-30 14:58 ` Christoffer Dall
2017-01-30 17:44 ` Marc Zyngier
2017-01-30 17:44 ` Marc Zyngier
2017-01-30 19:04 ` Christoffer Dall
2017-01-30 19:04 ` Christoffer Dall
2017-01-30 19:04 ` Christoffer Dall
2017-02-01 10:08 ` Marc Zyngier [this message]
2017-02-01 10:08 ` Marc Zyngier
2017-02-01 10:08 ` Marc Zyngier
2017-01-27 1:04 ` [RFC v2 06/10] KVM: arm/arm64: Update the physical timer interrupt level Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-29 15:21 ` Marc Zyngier
2017-01-29 15:21 ` Marc Zyngier
2017-01-29 15:21 ` Marc Zyngier
2017-01-30 15:02 ` Christoffer Dall
2017-01-30 15:02 ` Christoffer Dall
2017-01-30 17:50 ` Marc Zyngier
2017-01-30 17:50 ` Marc Zyngier
2017-01-30 17:50 ` Marc Zyngier
2017-01-30 18:41 ` Christoffer Dall
2017-01-30 18:41 ` Christoffer Dall
2017-01-30 18:48 ` Marc Zyngier
2017-01-30 18:48 ` Marc Zyngier
2017-01-30 18:48 ` Marc Zyngier
2017-01-30 19:06 ` Christoffer Dall
2017-01-30 19:06 ` Christoffer Dall
2017-01-30 19:06 ` Christoffer Dall
2017-01-31 17:00 ` Marc Zyngier
2017-01-31 17:00 ` Marc Zyngier
2017-01-31 17:00 ` Marc Zyngier
2017-02-01 8:02 ` Christoffer Dall
2017-02-01 8:02 ` Christoffer Dall
2017-02-01 8:02 ` Christoffer Dall
2017-02-01 8:04 ` Christoffer Dall
2017-02-01 8:04 ` Christoffer Dall
2017-02-01 8:04 ` Christoffer Dall
2017-02-01 8:40 ` Jintack Lim
2017-02-01 8:40 ` Jintack Lim
2017-02-01 8:40 ` Jintack Lim
2017-02-01 10:07 ` Christoffer Dall
2017-02-01 10:07 ` Christoffer Dall
2017-02-01 10:07 ` Christoffer Dall
2017-02-01 10:17 ` Marc Zyngier
2017-02-01 10:17 ` Marc Zyngier
2017-02-01 10:17 ` Marc Zyngier
2017-02-01 10:01 ` Marc Zyngier
2017-02-01 10:01 ` Marc Zyngier
2017-01-27 1:04 ` [RFC v2 07/10] KVM: arm/arm64: Set a background timer to the earliest timer expiration Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 08/10] KVM: arm/arm64: Set up a background timer for the physical timer emulation Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-27 1:04 ` [RFC v2 09/10] KVM: arm64: Add the EL1 physical timer access handler Jintack Lim
2017-01-27 1:04 ` Jintack Lim
2017-01-27 1:05 ` [RFC v2 10/10] KVM: arm/arm64: Emulate the EL1 phys timer register access Jintack Lim
2017-01-27 1:05 ` Jintack Lim
2017-01-29 15:44 ` Marc Zyngier
2017-01-29 15:44 ` Marc Zyngier
2017-01-29 15:44 ` Marc Zyngier
2017-01-30 17:08 ` Jintack Lim
2017-01-30 17:08 ` Jintack Lim
2017-01-30 17:08 ` Jintack Lim
2017-01-30 17:26 ` Peter Maydell
2017-01-30 17:26 ` Peter Maydell
2017-01-30 17:26 ` Peter Maydell
2017-01-30 17:35 ` Marc Zyngier
2017-01-30 17:35 ` Marc Zyngier
2017-01-30 17:35 ` Marc Zyngier
2017-01-30 17:38 ` Jintack Lim
2017-01-30 17:38 ` Jintack Lim
2017-01-30 17:38 ` Jintack Lim
2017-01-29 15:55 ` [RFC v2 00/10] Provide the EL1 physical timer to the VM Marc Zyngier
2017-01-29 15:55 ` Marc Zyngier
2017-01-29 15:55 ` Marc Zyngier
2017-01-30 19:02 ` Jintack Lim
2017-01-30 19:02 ` Jintack Lim
2017-01-30 19:02 ` Jintack Lim
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