From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@web.de>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Gleb Natapov <gleb@redhat.com>, kvm <kvm@vger.kernel.org>
Subject: Re: kvm's vapic
Date: Sun, 29 Jan 2012 18:27:44 +0200 [thread overview]
Message-ID: <4F257380.1030108@redhat.com> (raw)
In-Reply-To: <4F256BF2.1010906@web.de>
On 01/29/2012 05:55 PM, Jan Kiszka wrote:
> On 2012-01-29 16:52, Avi Kivity wrote:
> > On 01/29/2012 05:51 PM, Avi Kivity wrote:
> >>> Already the assumption that we find a CPU index at
> >>> fs:0x51 is apparently hard-coding this. Or that kernel code is at
> >>> 0x8xxxxxxx or 0xExxxxxxx.
> >>>
> >>> But what makes sure that we aren't patching some other obscure OS that
> >>> doesn't comply with our assumptions but triggers the TPR access reports
> >>> nevertheless?
> >>
> >> Not much, but we've never had an issue.
> >
> > Checking that the bios is mapped at 0x[8e]0000000 + phys should filter
> > out most non-Windows OSes.
>
> Possibly.
>
> What about that major/minor version entries in the KPCR? Do they work,
> and do we have a list of what should be there?
We don't. But things like the IDT/GTD/TSS and especially SelfPcr look
like good candidates.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-01-29 16:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-29 15:37 kvm's vapic Jan Kiszka
2012-01-29 15:51 ` Avi Kivity
2012-01-29 15:52 ` Avi Kivity
2012-01-29 15:55 ` Jan Kiszka
2012-01-29 16:27 ` Avi Kivity [this message]
2012-01-29 16:31 ` Jan Kiszka
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