From: Anthony Liguori <aliguori@us.ibm.com>
To: Gregory Haskins <ghaskins@novell.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
avi@redhat.com, glommer@redhat.com
Subject: Re: [KVM PATCH] KVM: introduce "xinterface" API for external interaction with guests
Date: Thu, 16 Jul 2009 11:09:50 -0500 [thread overview]
Message-ID: <4A5F50CE.1060808@us.ibm.com> (raw)
In-Reply-To: <4A5F4B96.6050409@novell.com>
Gregory Haskins wrote:
> That said, I think the assumption that was made when I was using this
> was that a proper ref for the page was acquired by the gfn_to_page() and
> dropped by the caller. This was always used in the context of a
> hypercall/vmexit so presumably the gpa should be considered stable
> across that call. Is that not true?
>
If you're in kvm.ko, then yes, that's a safe assumption to make because
the guest VCPU cannot run while you are running.
But you're opening this interface to any caller so the VCPU is likely to
be running while someone calls this function
> Regards,
> -Greg
>
>
>
--
Regards,
Anthony Liguori
next prev parent reply other threads:[~2009-07-16 16:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-16 15:19 [KVM PATCH] xinterface Gregory Haskins
2009-07-16 15:19 ` [KVM PATCH] KVM: introduce "xinterface" API for external interaction with guests Gregory Haskins
2009-07-16 15:30 ` Sam Ravnborg
2009-07-16 15:31 ` Gregory Haskins
2009-07-16 15:37 ` Anthony Liguori
2009-07-16 15:47 ` Gregory Haskins
2009-07-16 16:09 ` Anthony Liguori [this message]
2009-07-16 16:52 ` Arnd Bergmann
2009-07-16 18:22 ` Gregory Haskins
2009-07-16 18:53 ` Gregory Haskins
2009-07-16 19:38 ` Zan Lynx
2009-07-16 19:48 ` Gregory Haskins
2009-07-16 19:46 ` Arnd Bergmann
2009-07-17 0:25 ` Gregory Haskins
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