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From: Marc Zyngier <marc.zyngier@arm.com>
To: Miriam Zimmerman <mutexlox@google.com>, kvmarm@lists.cs.columbia.edu
Subject: Re: Timekeeping on ARM guests/hosts
Date: Wed, 10 Oct 2018 11:01:25 +0100	[thread overview]
Message-ID: <cd4eeb25-50c6-329d-d6e8-26caf478a041@arm.com> (raw)
In-Reply-To: <CAHSjozDb2_q9YgHsEerH_-2uc6S9W-cw_p2hTiafisQUTrwH6Q@mail.gmail.com>

Hi Myriam,

On 10/10/18 00:39, Miriam Zimmerman wrote:
> Hi,
> 
> I'm working with an ARM device hosting an ARM guest. When the host is 
> suspended, guest time stops advancing and it doesn't get adjusted on resume.

I know the feeling, my arm64 laptop gives me that kind of grief all the 
time... :-/

> For an x86 machine, the CONFIG_KVM_GUEST flag would enable paravirt for 
> time and fix this problem, but CONFIG_KVM_GUEST isn't available on ARM.
> 
> Is there a configuration option to enable paravirtualized timekeeping on 
> ARM? If not, how can I configure ARM guests to handle timekeeping properly?

PV time (or rather stolen time) is a work in progress at the moment, and 
Christoffer has his hands in that particular pie.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...

  reply	other threads:[~2018-10-10 10:01 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-09 23:39 Timekeeping on ARM guests/hosts Miriam Zimmerman
2018-10-10 10:01 ` Marc Zyngier [this message]
2018-10-10 18:38   ` Miriam Zimmerman
2018-10-11  7:54     ` Marc Zyngier
2018-10-11 15:21       ` Laszlo Ersek
2018-10-11 18:40         ` Miriam Zimmerman
2018-10-31 16:41           ` Steven Price
2018-10-31 18:49             ` Miriam Zimmerman
2018-11-02 14:34               ` Christoffer Dall
2018-11-02 18:28                 ` Miriam Zimmerman
2018-11-02 21:23                   ` Miriam Zimmerman
2018-11-06  7:45                     ` Christoffer Dall
2018-11-06 13:39                       ` Alex Bennée
2018-11-06 18:37                       ` Miriam Zimmerman
2018-11-07  9:42                         ` Christoffer Dall
2018-11-07 18:22                           ` Miriam Zimmerman
2018-11-08 10:26                             ` Christoffer Dall
2018-11-08 16:34                               ` Steven Price
2018-11-08 20:06                                 ` Christoffer Dall
2018-11-03  0:19                 ` Bijan Mottahedeh
2018-11-06  7:49                   ` Christoffer Dall

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