From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 08/14] KVM: ARM: World-switch implementation
Date: Fri, 30 Nov 2012 17:14:21 +0000 [thread overview]
Message-ID: <20121130171420.GC619@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <CANM98q+TQZiXe3GLjcPpPVZz40emmizgnEmyZEju1ruKNR6EEQ@mail.gmail.com>
On Fri, Nov 30, 2012 at 04:47:40PM +0000, Christoffer Dall wrote:
> On Fri, Nov 30, 2012 at 10:15 AM, Will Deacon <will.deacon@arm.com> wrote:
> > At this point, VM1 is running and VM0:VCPU1 is running. VM0:VCPU0 is not
> > running because physical CPU0 is handling an interrupt. The problem is that
> > when VCPU0 *is* resumed, it will update the VMID of VM0 and could be
> > scheduled in parallel with VCPU1 but with a different VMID.
> >
> > How do you avoid this in the current code?
> >
> I don't. Nice catch. Please apply your interesting brain to the following fix:)
I'm far too sober to look at your patch right now, but I'll think about it
over the weekend [I can't break it at a quick glance] :)
In the meantime, can you think about whether the TLB operations need to run
on every CPU please?
Will
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will.deacon@arm.com>
To: Christoffer Dall <c.dall@virtualopensystems.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
Marc Zyngier <Marc.Zyngier@arm.com>,
Antonios Motakis <a.motakis@virtualopensystems.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH v4 08/14] KVM: ARM: World-switch implementation
Date: Fri, 30 Nov 2012 17:14:21 +0000 [thread overview]
Message-ID: <20121130171420.GC619@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <CANM98q+TQZiXe3GLjcPpPVZz40emmizgnEmyZEju1ruKNR6EEQ@mail.gmail.com>
On Fri, Nov 30, 2012 at 04:47:40PM +0000, Christoffer Dall wrote:
> On Fri, Nov 30, 2012 at 10:15 AM, Will Deacon <will.deacon@arm.com> wrote:
> > At this point, VM1 is running and VM0:VCPU1 is running. VM0:VCPU0 is not
> > running because physical CPU0 is handling an interrupt. The problem is that
> > when VCPU0 *is* resumed, it will update the VMID of VM0 and could be
> > scheduled in parallel with VCPU1 but with a different VMID.
> >
> > How do you avoid this in the current code?
> >
> I don't. Nice catch. Please apply your interesting brain to the following fix:)
I'm far too sober to look at your patch right now, but I'll think about it
over the weekend [I can't break it at a quick glance] :)
In the meantime, can you think about whether the TLB operations need to run
on every CPU please?
Will
next prev parent reply other threads:[~2012-11-30 17:14 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-10 15:42 [PATCH v4 00/14] KVM/ARM Implementation Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 01/14] ARM: Add page table and page defines needed by KVM Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:14 ` Will Deacon
2012-11-19 14:14 ` Will Deacon
2012-11-29 15:57 ` Christoffer Dall
2012-11-29 15:57 ` Christoffer Dall
2012-11-30 11:46 ` Will Deacon
2012-11-30 11:46 ` Will Deacon
2012-11-30 15:54 ` Christoffer Dall
2012-11-30 15:54 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 02/14] ARM: Section based HYP idmap Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:16 ` Will Deacon
2012-11-19 14:16 ` Will Deacon
2012-11-29 18:59 ` Christoffer Dall
2012-11-29 18:59 ` Christoffer Dall
2012-11-30 10:58 ` Will Deacon
2012-11-30 10:58 ` Will Deacon
2012-11-30 16:29 ` Christoffer Dall
2012-11-30 16:29 ` Christoffer Dall
2012-11-19 14:25 ` Rob Herring
2012-11-19 14:25 ` Rob Herring
2012-11-10 15:42 ` [PATCH v4 03/14] ARM: Factor out cpuid implementor and part number Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:21 ` Will Deacon
2012-11-19 14:21 ` Will Deacon
2012-11-29 21:38 ` Christoffer Dall
2012-11-29 21:38 ` Christoffer Dall
2012-11-30 10:21 ` Will Deacon
2012-11-30 10:21 ` Will Deacon
2012-11-30 15:42 ` Christoffer Dall
2012-11-30 15:42 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 04/14] KVM: ARM: Initial skeleton to compile KVM support Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:41 ` Will Deacon
2012-11-19 14:41 ` Will Deacon
2012-11-29 22:36 ` Christoffer Dall
2012-11-29 22:36 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 05/14] KVM: ARM: Hypervisor inititalization Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:51 ` Will Deacon
2012-11-19 14:51 ` Will Deacon
2012-11-19 15:27 ` Cyril Chemparathy
2012-11-19 15:27 ` Cyril Chemparathy
2012-11-30 5:41 ` Christoffer Dall
2012-11-30 5:41 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 06/14] KVM: ARM: Memory virtualization setup Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:53 ` Will Deacon
2012-11-19 14:53 ` Will Deacon
2012-11-19 15:05 ` Christoffer Dall
2012-11-19 15:05 ` Christoffer Dall
2012-11-10 15:42 ` [PATCH v4 07/14] KVM: ARM: Inject IRQs and FIQs from userspace Christoffer Dall
2012-11-10 15:42 ` Christoffer Dall
2012-11-19 14:55 ` Will Deacon
2012-11-19 14:55 ` Will Deacon
2012-11-19 15:04 ` Christoffer Dall
2012-11-19 15:04 ` Christoffer Dall
2012-11-19 15:26 ` Will Deacon
2012-11-19 15:26 ` Will Deacon
2012-11-19 16:09 ` Christoffer Dall
2012-11-19 16:09 ` Christoffer Dall
2012-11-19 16:21 ` Will Deacon
2012-11-19 16:21 ` Will Deacon
2012-11-30 6:13 ` Christoffer Dall
2012-11-30 6:13 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 08/14] KVM: ARM: World-switch implementation Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 14:57 ` Will Deacon
2012-11-19 14:57 ` Will Deacon
2012-11-30 6:37 ` Christoffer Dall
2012-11-30 6:37 ` Christoffer Dall
2012-11-30 15:15 ` Will Deacon
2012-11-30 15:15 ` Will Deacon
2012-11-30 16:47 ` Christoffer Dall
2012-11-30 16:47 ` Christoffer Dall
2012-11-30 17:14 ` Will Deacon [this message]
2012-11-30 17:14 ` Will Deacon
2012-11-30 18:49 ` Christoffer Dall
2012-11-30 18:49 ` Christoffer Dall
2012-12-03 10:33 ` Marc Zyngier
2012-12-03 10:33 ` Marc Zyngier
2012-12-03 15:05 ` Christoffer Dall
2012-12-03 15:05 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 09/14] KVM: ARM: Emulation framework and CP15 emulation Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 15:01 ` Will Deacon
2012-11-19 15:01 ` Will Deacon
2012-11-19 15:27 ` [kvmarm] " Peter Maydell
2012-11-19 15:27 ` Peter Maydell
2012-11-20 2:18 ` Rusty Russell
2012-11-20 2:18 ` Rusty Russell
2012-11-30 20:22 ` Christoffer Dall
2012-11-30 20:22 ` Christoffer Dall
2012-12-03 11:05 ` Will Deacon
2012-12-03 11:05 ` Will Deacon
2012-12-03 19:09 ` Christoffer Dall
2012-12-03 19:09 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 10/14] KVM: ARM: User space API for getting/setting co-proc registers Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 15:02 ` Will Deacon
2012-11-19 15:02 ` Will Deacon
2012-11-30 6:42 ` Christoffer Dall
2012-11-30 6:42 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 11/14] KVM: ARM: Demux CCSIDR in the userspace API Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 15:03 ` Will Deacon
2012-11-19 15:03 ` Will Deacon
2012-11-30 6:45 ` Christoffer Dall
2012-11-30 6:45 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 12/14] KVM: ARM: VFP userspace interface Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 13/14] KVM: ARM: Handle guest faults in KVM Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 15:07 ` Will Deacon
2012-11-19 15:07 ` Will Deacon
2012-11-30 21:40 ` Christoffer Dall
2012-11-30 21:40 ` Christoffer Dall
2012-12-03 13:06 ` Will Deacon
2012-12-03 13:06 ` Will Deacon
2012-12-03 15:02 ` Christoffer Dall
2012-12-03 15:02 ` Christoffer Dall
2012-11-10 15:43 ` [PATCH v4 14/14] KVM: ARM: Handle I/O aborts Christoffer Dall
2012-11-10 15:43 ` Christoffer Dall
2012-11-19 15:09 ` Will Deacon
2012-11-19 15:09 ` Will Deacon
2012-11-30 14:46 ` Dave Martin
2012-11-30 14:46 ` Dave Martin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20121130171420.GC619@mudshark.cambridge.arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.