From: Gleb Natapov <gleb@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Julian Stecklina <js@alien8.de>, kvm@vger.kernel.org
Subject: Re: [PATCH 13/15] Add NMI injection support to SVM.
Date: Sun, 19 Apr 2009 17:29:15 +0300 [thread overview]
Message-ID: <20090419142915.GR10126@redhat.com> (raw)
In-Reply-To: <49EB3335.6030607@redhat.com>
On Sun, Apr 19, 2009 at 05:20:37PM +0300, Avi Kivity wrote:
> Gleb Natapov wrote:
>>> Could you elaborate on that? How/why does it use NMIs for task
>>> switching?
>>>
>>>
>> During WHQL testing (or if you just enable verifier on windows 2003)
>> windows changes hibernate to not power down a PC, but resume
>> immediately. During this immediate resume it sends NMI to non-boot CPUs
>> while IDT for nmi is configured as a task gate. I am not sure it
>> actually calls IRET after that.
>>
>
> If it doesn't call IRET, it will never see another NMI.
>
> But of course it will execute IRET, as part of normal execution. You
> can't do anything without it.
>
Boot CPU can send INIT after task switch (and I think this is what
happens).
--
Gleb.
next prev parent reply other threads:[~2009-04-19 14:29 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-13 9:55 [PATCH 00/15] interrupt injection rework Gleb Natapov
2009-04-13 9:55 ` [PATCH 01/15] Make kvm_cpu_(has|get)_interrupt() work for userspace irqchip too Gleb Natapov
2009-04-13 9:55 ` [PATCH 02/15] Consolidate userspace and kernel interrupt injection for VMX Gleb Natapov
2009-04-13 9:55 ` [PATCH 03/15] Cleanup vmx_intr_assist() Gleb Natapov
2009-04-13 9:55 ` [PATCH 04/15] Use kvm_arch_interrupt_allowed() instead of checking interrupt_window_open directly Gleb Natapov
2009-04-13 9:55 ` [PATCH 05/15] Coalesce userspace/kernel irqchip interrupt injection logic Gleb Natapov
2009-04-14 14:14 ` Dmitry Eremin-Solenikov
2009-04-14 14:24 ` Gleb Natapov
2009-04-14 14:32 ` Dmitry Eremin-Solenikov
2009-04-14 14:55 ` Gleb Natapov
2009-04-14 15:38 ` Gleb Natapov
2009-04-14 19:29 ` Dmitry Eremin-Solenikov
2009-04-14 19:41 ` Gleb Natapov
2009-04-15 6:11 ` Gleb Natapov
2009-04-15 9:30 ` Dmitry Eremin-Solenikov
2009-04-15 9:39 ` Gleb Natapov
2009-04-15 10:22 ` Jan Kiszka
2009-04-15 10:36 ` Gleb Natapov
2009-04-15 10:51 ` Jan Kiszka
2009-04-15 10:57 ` Gleb Natapov
2009-04-15 9:44 ` Gleb Natapov
2009-04-15 11:11 ` Dmitry Eremin-Solenikov
2009-04-15 11:26 ` Jan Kiszka
2009-04-15 11:53 ` Dmitry Eremin-Solenikov
2009-04-15 11:58 ` Dmitry Eremin-Solenikov
2009-04-15 12:01 ` Gleb Natapov
2009-04-15 12:02 ` Dmitry Eremin-Solenikov
2009-04-15 12:03 ` Jan Kiszka
2009-04-15 12:39 ` Dmitry Eremin-Solenikov
2009-04-15 12:48 ` Jan Kiszka
2009-04-14 16:10 ` Avi Kivity
2009-04-14 16:18 ` Gleb Natapov
2009-04-17 12:39 ` Jan Kiszka
2009-04-17 12:50 ` Jan Kiszka
2009-04-17 14:13 ` Dmitry Eremin-Solenikov
2009-04-18 9:16 ` Jan Kiszka
2009-04-18 16:28 ` Gleb Natapov
2009-04-19 13:57 ` Gleb Natapov
2009-04-19 14:05 ` Jan Kiszka
2009-04-19 14:05 ` [Qemu-devel] " Jan Kiszka
2009-04-19 14:28 ` Gleb Natapov
2009-04-19 14:28 ` [Qemu-devel] " Gleb Natapov
2009-04-19 15:06 ` Jan Kiszka
2009-04-19 15:06 ` [Qemu-devel] " Jan Kiszka
2009-04-19 15:20 ` Gleb Natapov
2009-04-19 15:20 ` [Qemu-devel] " Gleb Natapov
2009-04-18 9:05 ` Jan Kiszka
2009-04-18 16:20 ` Gleb Natapov
2009-04-19 8:52 ` Avi Kivity
2009-04-13 9:55 ` [PATCH 06/15] Use EVENTINJ to inject interrupts Gleb Natapov
2009-04-13 9:55 ` [PATCH 07/15] Remove exception_injected() callback Gleb Natapov
2009-04-13 9:55 ` [PATCH 08/15] Remove inject_pending_vectors() callback Gleb Natapov
2009-04-13 9:55 ` [PATCH 09/15] kvm_push_irq() no longer used Gleb Natapov
2009-04-13 9:55 ` [PATCH 10/15] sync_lapic_to_cr8() should always sync cr8 to V_TPR Gleb Natapov
2009-04-13 9:55 ` [PATCH 11/15] Do not report TPR write to userspace if new value bigger or equal to a previous one Gleb Natapov
2009-04-13 9:55 ` [PATCH 12/15] Get rid of arch.interrupt_window_open & arch.nmi_window_open Gleb Natapov
2009-04-13 9:55 ` [PATCH 13/15] Add NMI injection support to SVM Gleb Natapov
2009-04-17 11:59 ` Jan Kiszka
2009-04-17 15:12 ` Dmitry Eremin-Solenikov
2009-04-19 13:11 ` Gleb Natapov
2009-04-20 12:08 ` Dmitry Eremin-Solenikov
2009-04-20 15:50 ` Jan Kiszka
2009-04-21 14:07 ` Gleb Natapov
2009-04-17 19:13 ` Dmitry Eremin-Solenikov
2009-04-17 19:53 ` Jan Kiszka
2009-04-18 9:08 ` Jan Kiszka
2009-04-17 19:55 ` Jan Kiszka
2009-04-19 8:57 ` Avi Kivity
2009-04-19 9:12 ` Jan Kiszka
2009-04-19 13:17 ` Gleb Natapov
2009-04-19 13:21 ` Avi Kivity
2009-04-19 13:24 ` Gleb Natapov
2009-04-19 13:28 ` Avi Kivity
2009-04-19 13:40 ` Gleb Natapov
2009-04-19 13:43 ` Jan Kiszka
2009-04-19 13:49 ` Avi Kivity
2009-04-19 13:51 ` Gleb Natapov
2009-04-19 13:59 ` Jan Kiszka
2009-04-19 13:27 ` Jan Kiszka
2009-04-19 13:32 ` Gleb Natapov
2009-04-19 13:40 ` Jan Kiszka
2009-04-19 13:40 ` Avi Kivity
2009-04-19 13:41 ` Gleb Natapov
2009-04-19 13:43 ` Avi Kivity
2009-04-19 13:44 ` Gleb Natapov
2009-04-19 14:07 ` Julian Stecklina
2009-04-19 14:13 ` Gleb Natapov
2009-04-19 14:20 ` Avi Kivity
2009-04-19 14:29 ` Gleb Natapov [this message]
2009-04-19 14:57 ` Avi Kivity
2009-04-19 16:36 ` Gleb Natapov
2009-04-13 9:55 ` [PATCH 14/15] Move interrupt injection logic to x86.c Gleb Natapov
2009-04-14 7:22 ` Gleb Natapov
2009-04-13 9:55 ` [PATCH 15/15] Get rid of get_irq() callback Gleb Natapov
2009-04-13 11:51 ` [PATCH 00/15] interrupt injection rework Avi Kivity
2009-04-14 3:20 ` Sheng Yang
2009-04-14 5:20 ` Gleb Natapov
2009-04-14 15:33 ` Joerg Roedel
2009-04-14 15:37 ` Gleb Natapov
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