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Re: [Qemu-devel] [PATCH] KVM: emulate lapic tsc deadline timer for guest
From: |
Liu, Jinsong |
Subject: |
Re: [Qemu-devel] [PATCH] KVM: emulate lapic tsc deadline timer for guest |
Date: |
Thu, 6 Oct 2011 01:18:15 +0800 |
Marcelo Tosatti wrote:
> On Sun, Sep 25, 2011 at 10:47:46PM +0800, Liu, Jinsong wrote:
>> Marcelo Tosatti wrote:
>>> On Fri, Sep 23, 2011 at 04:25:51PM +0800, Liu, Jinsong wrote:
>>>> Marcelo Tosatti wrote:
>>>>> On Thu, Sep 22, 2011 at 04:55:52PM +0800, Liu, Jinsong wrote:
>>>>>>> From 4d5b83aba40ce0d421add9a41a6c591a8590a32e Mon Sep 17
>>>>>>> 00:00:00 2001
>>>>>> From: Liu, Jinsong <address@hidden>
>>>>>> Date: Thu, 22 Sep 2011 14:00:08 +0800
>>>>>> Subject: [PATCH 2/2] KVM: emulate lapic tsc deadline timer for
>>>>>> guest
>>>>>>
>>>>>> This patch emulate lapic tsc deadline timer for guest:
>>>>>> Enumerate tsc deadline timer capability by CPUID;
>>>>>> Enable tsc deadline timer mode by lapic MMIO;
>>>>>> Start tsc deadline timer by WRMSR;
>>>>>>
>>>>>> Signed-off-by: Liu, Jinsong <address@hidden> ---
>>>>>> arch/x86/include/asm/kvm_host.h | 2 +
>>>>>> arch/x86/kvm/kvm_timer.h | 2 +
>>>>>> arch/x86/kvm/lapic.c | 123
>>>>>> ++++++++++++++++++++++++++++++++------- arch/x86/kvm/lapic.h
>>>>>> | 3 + arch/x86/kvm/x86.c | 16 +++++-
>>>>>> 5 files changed, 123 insertions(+), 23 deletions(-)
>>>>>
>>>>> Looks good, please rebase against branch master of
>>>>>
>>>>> git://github.com/avikivity/kvm.git
>>>>
>>>> Rebased as attached.
>>>>
>>>> Thanks,
>>>> Jinsong
>>>
>>> Please write a simple test case to arm a lapic timer via wrmsr (see
>>> https://github.com/avikivity/kvm-unit-tests).
>>>
>>> Kernel patches have been applied, thanks.
>>
>> Marcelo,
>>
>> I'm not quite clear the purpose and usage of test case of the
>> kvm-unit-tests. Can you give me some hint?
>
> The purpose is to add unit tests for new features (such as lapic
> deadline timer). There are examples that make it relatively easy to
> construct new test case (or modify existing ones to accomodate new
> tests).
>
> Please add a new test case for lapic deadline timer, thanks.
Thanks Marcelo. I will add the test case. Sorry for slow email reply because of
holiday.
Regards,
Jinsong