linux-kernel - Re: Xenner design and kvm msr handling

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Message-ID: <49EDCB1D.1010301@redhat.com>
Date:	Tue, 21 Apr 2009 16:33:17 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Gerd Hoffmann <kraxel@...hat.com>
CC:	Anthony Liguori <anthony@...emonkey.ws>,
	Huang Ying <ying.huang@...el.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: Xenner design and kvm msr handling

Gerd Hoffmann wrote:
> Not sure, have to dig into the xen code to figure.
>
> Could be xen doesn't remember the page in the first place.  They might 
> let the illegal instruction fault handler patch the opcode.  At least 
> I vaguely remember some discussions about that.
>
> Could be there isn't a interface to forgot the page.  "reboot" in xen 
> land is "destroy guest, restart it".

How do you unload a driver then?

What about kexec?

I'm glad we didn't do a hypercall page in kvm.

>> Sure, but later on, we may want to take advantage of kernel netback.
>
> Agree.  But right now I have more important stuff to worry about ;)

Still good to know what to expect later on.

-- 
error compiling committee.c: too many arguments to function

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