[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC] Next gen kvm api
From: |
Scott Wood |
Subject: |
Re: [Qemu-devel] [RFC] Next gen kvm api |
Date: |
Fri, 17 Feb 2012 12:27:39 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:6.0.2) Gecko/20110906 Thunderbird/6.0.2 |
On 02/16/2012 06:23 PM, Alexander Graf wrote:
> On 16.02.2012, at 21:41, Scott Wood wrote:
>> And yes, we do have fancier hardware coming fairly soon for which this
>> breaks (TLB0 entries can be loaded without host involvement, as long as
>> there's a translation from guest physical to physical in a separate
>> hardware table). It'd be reasonable to ignore TLB0 for migration (treat
>> it as invalidated), but not for debug since that may be where the
>> translation we're interested in resides.
>
> Could we maybe add an ioctl that forces kvm to read out the current tlb0
> contents and push them to memory? How slow would that be?
Yes, I was thinking something like that. We'd just have to remove (make
conditional on MMU type) the statement that this is synchronized
implicitly on return from vcpu_run.
Performance shouldn't be a problem -- we'd only need to sync once and
then can do all the repeated debug accesses we want. So should be no
need to mess around with partial sync.
-Scott
- Re: [Qemu-devel] [RFC] Next gen kvm api, (continued)
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api, Scott Wood, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api,
Scott Wood <=
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/18
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/16
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/18
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/18
- Re: [Qemu-devel] [RFC] Next gen kvm api, Scott Wood, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Takuya Yoshikawa, 2012/02/12
- Re: [Qemu-devel] [RFC] Next gen kvm api, Avi Kivity, 2012/02/15
- Re: [Qemu-devel] [RFC] Next gen kvm api, Anthony Liguori, 2012/02/07
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alexander Graf, 2012/02/07
- Re: [Qemu-devel] [RFC] Next gen kvm api, Alan Cox, 2012/02/08