From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH] KVM: VMX: Conditionally reload debug register 6
Date: Tue, 01 Sep 2009 15:54:59 +0300 [thread overview]
Message-ID: <4A9D19A3.1000500@redhat.com> (raw)
In-Reply-To: <4A9D144B.1020807@siemens.com>
On 09/01/2009 03:32 PM, Jan Kiszka wrote:
> I'm worried about vm-exits that may take precedence over the #db trap.
> If we skip to save/restore dr6 for them, the value that the interception
> handler sees later on will be bogus. Or is this architecturally impossible?
>
I think it's architectually impossible. Debug traps take effect after
the instruction executed, so if we made it to that point, nothing else
can cause the vmexit.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2009-09-01 12:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-01 11:40 [PATCH] KVM: VMX: Conditionally reload debug register 6 Avi Kivity
2009-09-01 11:43 ` Jan Kiszka
2009-09-01 11:53 ` Avi Kivity
2009-09-01 12:32 ` Jan Kiszka
2009-09-01 12:54 ` Avi Kivity [this message]
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