From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"joerg.roedel@amd.com" <joerg.roedel@amd.com>
Subject: Re: [PATCH 3/6] Emulator: Inject #PF when page was not found
Date: Sun, 17 May 2009 23:58:06 +0300 [thread overview]
Message-ID: <4A107A5E.5010403@redhat.com> (raw)
In-Reply-To: <FF2421B1-CEC1-48E3-8BCF-701CFB57FC1D@suse.de>
Alexander Graf wrote:
>>
>> I can't think why it was done for writes. Normally, a guest page
>> fault would be trapped and reflected a long time before emulation, in
>> FNAME(page_fault)(), after walk_addr().
>>
>> Can you give some details on the situation? What instruction was
>> executed, and why kvm tried to emulate it?
>
> I remember it was something about accessing the apic with npt. Maybe
> the real problem was the restricted bit checking that made the
> emulated instruction behave differently from the real mmu.
The apic should not be mapped by Hyper-V's shadow page tables, so this
should have been handled by page_fault().
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2009-05-17 20:58 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-15 8:22 [PATCH 0/6] Add rudimentary Hyper-V guest support Alexander Graf
2009-05-15 8:22 ` [PATCH 1/6] Add definition for IGNNE MSR Alexander Graf
2009-05-15 8:22 ` [PATCH 2/6] MMU: don't bail on PAT bits in PTE Alexander Graf
2009-05-15 8:22 ` [PATCH 3/6] Emulator: Inject #PF when page was not found Alexander Graf
2009-05-15 8:22 ` [PATCH 4/6] Implement Hyper-V MSRs Alexander Graf
2009-05-15 8:22 ` [PATCH 5/6] Nested SVM: Implement INVLPGA Alexander Graf
2009-05-15 8:22 ` [PATCH 6/6] Nested SVM: Improve interrupt injection Alexander Graf
2009-05-17 6:48 ` Gleb Natapov
2009-05-17 8:10 ` Alexander Graf
2009-05-18 11:47 ` Alexander Graf
2009-05-15 13:43 ` [PATCH 5/6] Nested SVM: Implement INVLPGA Joerg Roedel
2009-05-17 20:02 ` Avi Kivity
2009-05-17 20:03 ` Avi Kivity
2009-05-18 18:46 ` Marcelo Tosatti
2009-05-18 13:00 ` Alexander Graf
2009-05-17 9:54 ` [PATCH 4/6] Implement Hyper-V MSRs Avi Kivity
2009-05-17 19:57 ` Alexander Graf
2009-05-17 20:00 ` Avi Kivity
2009-05-17 20:27 ` Alexander Graf
2009-05-17 20:37 ` Alexander Graf
2009-05-15 13:40 ` [PATCH 3/6] Emulator: Inject #PF when page was not found Joerg Roedel
2009-05-17 19:59 ` Avi Kivity
2009-05-17 20:25 ` Alexander Graf
2009-05-17 20:58 ` Avi Kivity [this message]
2009-05-18 12:55 ` Alexander Graf
2009-05-15 10:25 ` [PATCH 2/6] MMU: don't bail on PAT bits in PTE Michael S. Tsirkin
2009-05-15 10:53 ` Alexander Graf
2009-05-15 13:19 ` Joerg Roedel
2009-05-17 9:51 ` Avi Kivity
2009-05-15 10:47 ` [PATCH 0/6] Add rudimentary Hyper-V guest support Alexander Graf
2009-05-17 21:08 ` Avi Kivity
2009-05-18 12:45 ` Alexander Graf
2009-05-18 13:29 ` Avi Kivity
2009-05-18 13:35 ` Alexander Graf
2009-05-18 13:44 ` Avi Kivity
2009-05-18 15:15 ` Alexander Graf
2009-05-18 15:20 ` Avi Kivity
2009-05-18 15:24 ` Alexander Graf
2009-05-18 15:28 ` Avi Kivity
2009-05-18 15:32 ` Alexander Graf
2009-05-18 15:35 ` Avi Kivity
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