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From: cov@codeaurora.org (Christopher Covington)
To: linux-arm-kernel@lists.infradead.org
Subject: [kvmarm] [PATCH 14/29] arm64: KVM: guest one-reg interface
Date: Wed, 20 Mar 2013 16:06:17 -0400	[thread overview]
Message-ID: <514A16B9.2040804@codeaurora.org> (raw)
In-Reply-To: <CAFEAcA8DkB0tMN6V1fi=teujm0hWji-O9ZF8+iOswTOihEjFcA@mail.gmail.com>

Hi Marc, Peter,

On 03/14/2013 04:57 AM, Peter Maydell wrote:
> On 13 March 2013 20:34, Christopher Covington <cov@codeaurora.org> wrote:
>> My guess at the goal of the code cited above in this email is that it's trying
>> to sanity check that virtualization will work. Rather than taking a default
>> deny approach with a hand-maintained white list of virtualization-supporting
>> machine identifiers, why not check that EL2 is implemented on the current
>> system and if it's not implied by that, that the timer and interrupt
>> controller are suitable as well?

[...]

> ...you need to implement emulation code for the imp-def registers for a
> guest CPU.

[...]

This is reasonable. In this light the code I was picking out above is simply
converting MIDRs to KVM_ARM_TARGET_* constants. Because the mapping isn't
one-to-one, the hand-maintained list is an acceptable approach.

In the long term, I wonder if some kind of KVM_TARGET_CURRENT_CPU might be handy.

Thanks,
Christopher

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by
the Linux Foundation

  reply	other threads:[~2013-03-20 20:06 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-05  3:47 [PATCH 00/29] Port of KVM to arm64 Marc Zyngier
2013-03-05  3:47 ` [PATCH 01/29] arm64: KVM: define HYP and Stage-2 translation page flags Marc Zyngier
2013-03-05  3:47 ` [PATCH 02/29] arm64: KVM: HYP mode idmap support Marc Zyngier
2013-03-05  3:47 ` [PATCH 03/29] arm64: KVM: EL2 register definitions Marc Zyngier
2013-03-05  3:47 ` [PATCH 04/29] arm64: KVM: system register definitions for 64bit guests Marc Zyngier
2013-03-07 10:33   ` [kvmarm] " Alexander Graf
2013-03-08  3:23     ` Marc Zyngier
2013-03-12 13:20   ` Christopher Covington
2013-03-12 13:41     ` Christopher Covington
2013-03-12 13:50     ` Marc Zyngier
2013-03-05  3:47 ` [PATCH 05/29] arm64: KVM: Basic ESR_EL2 helpers and vcpu register access Marc Zyngier
2013-03-16  0:55   ` Geoff Levand
2013-03-05  3:47 ` [PATCH 06/29] arm64: KVM: fault injection into a guest Marc Zyngier
2013-03-12 13:20   ` Christopher Covington
2013-03-12 14:25     ` Marc Zyngier
2013-03-16  1:03   ` Geoff Levand
2013-03-05  3:47 ` [PATCH 07/29] arm64: KVM: architecture specific MMU backend Marc Zyngier
2013-03-05  3:47 ` [PATCH 08/29] arm64: KVM: user space interface Marc Zyngier
2013-03-07  8:09   ` Michael S. Tsirkin
2013-03-08  3:46     ` [kvmarm] " Marc Zyngier
2013-03-10  9:23       ` Michael S. Tsirkin
2013-03-05  3:47 ` [PATCH 09/29] arm64: KVM: system register handling Marc Zyngier
2013-03-07 10:30   ` [kvmarm] " Alexander Graf
2013-03-08  3:29     ` Marc Zyngier
2013-03-25  8:19     ` Marc Zyngier
2013-04-23 23:07       ` Christoffer Dall
2013-03-05  3:47 ` [PATCH 10/29] arm64: KVM: Cortex-A57 specific system registers handling Marc Zyngier
2013-03-13 18:30   ` Christopher Covington
2013-03-14 10:26     ` Marc Zyngier
2013-03-05  3:47 ` [PATCH 11/29] arm64: KVM: virtual CPU reset Marc Zyngier
2013-03-05  3:47 ` [PATCH 12/29] arm64: KVM: kvm_arch and kvm_vcpu_arch definitions Marc Zyngier
2013-03-12 17:30   ` Christopher Covington
2013-03-05  3:47 ` [PATCH 13/29] arm64: KVM: MMIO access backend Marc Zyngier
2013-03-05  3:47 ` [PATCH 14/29] arm64: KVM: guest one-reg interface Marc Zyngier
2013-03-12 17:31   ` Christopher Covington
2013-03-12 18:05     ` Marc Zyngier
2013-03-12 22:07       ` Christopher Covington
2013-03-13  7:48         ` Marc Zyngier
2013-03-13 20:34           ` Christopher Covington
2013-03-14  8:57             ` [kvmarm] " Peter Maydell
2013-03-20 20:06               ` Christopher Covington [this message]
2013-03-05  3:47 ` [PATCH 15/29] arm64: KVM: hypervisor initialization code Marc Zyngier
2013-03-05  3:47 ` [PATCH 16/29] arm64: KVM: HYP mode world switch implementation Marc Zyngier
2013-03-13 19:59   ` Christopher Covington
2013-03-20 20:04     ` Christopher Covington
2013-03-21 11:54       ` Marc Zyngier
2013-03-05  3:47 ` [PATCH 17/29] arm64: KVM: Exit handling Marc Zyngier
2013-03-05  3:47 ` [PATCH 18/29] arm64: KVM: Plug the VGIC Marc Zyngier
2013-03-05  3:47 ` [PATCH 19/29] arm64: KVM: Plug the arch timer Marc Zyngier
2013-03-05  3:47 ` [PATCH 20/29] arm64: KVM: PSCI implementation Marc Zyngier
2013-03-05  3:47 ` [PATCH 21/29] arm64: KVM: Build system integration Marc Zyngier
2013-03-05  3:47 ` [PATCH 22/29] arm64: KVM: define 32bit specific registers Marc Zyngier
2013-03-18 17:03   ` Christopher Covington
2013-03-05  3:47 ` [PATCH 23/29] arm64: KVM: 32bit GP register access Marc Zyngier
2013-03-16  0:24   ` Geoff Levand
2013-03-05  3:47 ` [PATCH 24/29] arm64: KVM: 32bit conditional execution emulation Marc Zyngier
2013-03-18 17:04   ` Christopher Covington
2013-03-05  3:47 ` [PATCH 25/29] arm64: KVM: 32bit handling of coprocessor traps Marc Zyngier
2013-03-05  3:47 ` [PATCH 26/29] arm64: KVM: 32bit coprocessor access for Cortex-A57 Marc Zyngier
2013-03-05  3:47 ` [PATCH 27/29] arm64: KVM: 32bit specific register world switch Marc Zyngier
2013-03-05  3:47 ` [PATCH 28/29] arm64: KVM: 32bit guest fault injection Marc Zyngier
2013-03-18 18:45   ` Christopher Covington
2013-03-05  3:47 ` [PATCH 29/29] arm64: KVM: enable initialization of a 32bit vcpu Marc Zyngier
2013-03-18 18:56   ` Christopher Covington

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