From: Avi Kivity <avi@redhat.com>
To: Lok Kwong Yan <loyan@syr.edu>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Does KVM use one EPT table per Guest CR3?
Date: Sun, 12 Dec 2010 12:47:11 +0200 [thread overview]
Message-ID: <4D04A82F.4020808@redhat.com> (raw)
In-Reply-To: <562744ED4DABB345A26E01CB5D34F51031930CCE@BL2PRD0103MB033.prod.exchangelabs.com>
On 12/10/2010 09:44 AM, Lok Kwong Yan wrote:
> Thanks again.
>
> I understand that the table can change over time, but it doesn't explain why the top-most table gets zapped and seemingly recreated with a different page frame (and thus the different EPTP values) so frequently. Why isn't the table being updated instead of being destroyed and then recreated? Which piece of the puzzle and I missing?
When the physical memory map changes the EPT tables are zapped. This
happens when PCI BARs are remapped, or when VGA remaps the framebuffer
windows at 0xa0000-0xc0000. Both of these happen during boot. Do you
see zaps happening after boot is complete?
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-12-12 10:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-07 21:47 Does KVM use one EPT table per Guest CR3? Lok Kwong Yan
2010-12-07 21:57 ` Anthony Liguori
2010-12-07 22:00 ` Lok Kwong Yan
2010-12-07 22:11 ` Anthony Liguori
2010-12-10 7:44 ` Lok Kwong Yan
2010-12-12 10:47 ` Avi Kivity [this message]
2010-12-16 22:14 ` Lok Kwong Yan
2010-12-17 15:24 ` Avi Kivity
2010-12-19 14:31 ` Avi Kivity
2010-12-22 21:56 ` Lok Kwong Yan
2011-02-10 20:47 ` Lok Kwong Yan
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