linux-kernel - Re: Paravirtualization on VMware's Platform [VMI].

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Message-ID: <4AB67BB0.3020303@redhat.com>
Date:	Sun, 20 Sep 2009 22:00:00 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Arjan van de Ven <arjan@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Alok Kataria <akataria@...are.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Chris Wright <chrisw@...s-sol.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	Greg KH <greg@...ah.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Paravirtualization on VMware's Platform [VMI].

On 09/20/2009 06:49 PM, Jeremy Fitzhardinge wrote:
>> kvm will be removing the pvmmu support soon; and Xen is talking about
>> running paravirtualized guests in a vmx/svm container where they don't
>> need most of the hooks.
>>
>>      
> We have no plans to drop support for non-vmx/svm capable processors, let
> alone require ept/npt.
>    

Today, certainly; similarly kvm will host-side pvmmu support for a while 
to support live migration from older hosts.

But in a few years it may make sense to run everything in a vmx/svm 
container even for Xen; we can then drop x86 pv_ops for good.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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