From: George Dunlap <george.dunlap@citrix.com>
To: Dario Faggioli <dario.faggioli@citrix.com>,
"Wu, Feng" <feng.wu@intel.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
Jan Beulich <jbeulich@suse.com>
Subject: Re: [PATCH v7 15/17] vmx: VT-d posted-interrupt core logic handling
Date: Thu, 17 Sep 2015 12:44:44 +0100 [thread overview]
Message-ID: <55FAA7AC.3010909@citrix.com> (raw)
In-Reply-To: <55FA8A02.30705@citrix.com>
On 09/17/2015 10:38 AM, George Dunlap wrote:
> Is it the case that the interrupt is not actually delivered to the
> processor, but that the pending bit will be set in the pi field, so that
> the interrupt will be delivered the next time the hypervisor returns
> into the guest?
>
> (I am assuming that is the case, because if the hypervisor *does* get an
> interrupt, then it can just unblock it there.)
Actually, it looks like you *do* in fact get a
pi_notification_interrupt() in this case. Could we to check to see if
the current vcpu is blocked and unblock it?
I haven't yet decided whether I prefer my original suggestion of
switching the interrupt and putting things on the wake-up list in
vcpu_block(), or of deferring adding things to the wake-up list until
the actual context switch.
-George
next prev parent reply other threads:[~2015-09-17 11:44 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-11 8:28 [PATCH v7 00/17] Add VT-d Posted-Interrupts support Feng Wu
2015-09-11 8:28 ` [PATCH v7 01/17] VT-d Posted-intterrupt (PI) design Feng Wu
2015-09-11 8:28 ` [PATCH v7 02/17] Add cmpxchg16b support for x86-64 Feng Wu
2015-09-22 13:50 ` Jan Beulich
2015-09-22 13:55 ` Wu, Feng
2015-09-11 8:28 ` [PATCH v7 03/17] iommu: Add iommu_intpost to control VT-d Posted-Interrupts feature Feng Wu
2015-09-11 8:28 ` [PATCH v7 04/17] vt-d: VT-d Posted-Interrupts feature detection Feng Wu
2015-09-22 14:18 ` Jan Beulich
2015-09-11 8:28 ` [PATCH v7 05/17] vmx: Extend struct pi_desc to support VT-d Posted-Interrupts Feng Wu
2015-09-22 14:20 ` Jan Beulich
2015-09-23 1:02 ` Wu, Feng
2015-09-23 7:36 ` Jan Beulich
2015-09-11 8:28 ` [PATCH v7 06/17] vmx: Add some helper functions for Posted-Interrupts Feng Wu
2015-09-11 8:28 ` [PATCH v7 07/17] vmx: Initialize VT-d Posted-Interrupts Descriptor Feng Wu
2015-09-11 8:28 ` [PATCH v7 08/17] vmx: Suppress posting interrupts when 'SN' is set Feng Wu
2015-09-22 14:23 ` Jan Beulich
2015-09-11 8:28 ` [PATCH v7 09/17] VT-d: Remove pointless casts Feng Wu
2015-09-22 14:30 ` Jan Beulich
2015-09-11 8:28 ` [PATCH v7 10/17] vt-d: Extend struct iremap_entry to support VT-d Posted-Interrupts Feng Wu
2015-09-22 14:28 ` Jan Beulich
2015-09-11 8:29 ` [PATCH v7 11/17] vt-d: Add API to update IRTE when VT-d PI is used Feng Wu
2015-09-22 14:42 ` Jan Beulich
2015-09-11 8:29 ` [PATCH v7 12/17] x86: move some APIC related macros to apicdef.h Feng Wu
2015-09-22 14:44 ` Jan Beulich
2015-09-11 8:29 ` [PATCH v7 13/17] Update IRTE according to guest interrupt config changes Feng Wu
2015-09-22 14:51 ` Jan Beulich
2015-09-11 8:29 ` [PATCH v7 14/17] vmx: Properly handle notification event when vCPU is running Feng Wu
2015-09-11 8:29 ` [PATCH v7 15/17] vmx: VT-d posted-interrupt core logic handling Feng Wu
2015-09-16 16:00 ` Dario Faggioli
2015-09-16 17:18 ` Dario Faggioli
2015-09-16 18:05 ` Dario Faggioli
2015-09-17 8:00 ` Wu, Feng
2015-09-17 8:48 ` Dario Faggioli
2015-09-17 9:16 ` Wu, Feng
2015-09-17 9:38 ` George Dunlap
2015-09-17 9:39 ` George Dunlap
2015-09-17 11:44 ` George Dunlap [this message]
2015-09-17 12:40 ` Dario Faggioli
2015-09-17 14:30 ` George Dunlap
2015-09-17 16:36 ` Dario Faggioli
2015-09-18 6:27 ` Jan Beulich
2015-09-18 9:22 ` Dario Faggioli
2015-09-18 14:31 ` George Dunlap
2015-09-18 14:34 ` George Dunlap
2015-09-11 8:29 ` [PATCH v7 16/17] VT-d: Dump the posted format IRTE Feng Wu
2015-09-22 14:58 ` Jan Beulich
2015-09-11 8:29 ` [PATCH v7 17/17] Add a command line parameter for VT-d posted-interrupts Feng Wu
-- strict thread matches above, loose matches on Subject: below --
2015-09-21 5:08 [PATCH v7 15/17] vmx: VT-d posted-interrupt core logic handling Wu, Feng
2015-09-21 9:18 ` George Dunlap
2015-09-21 11:59 ` Wu, Feng
2015-09-21 13:31 ` Dario Faggioli
2015-09-21 13:50 ` Wu, Feng
2015-09-21 14:11 ` Dario Faggioli
2015-09-22 5:10 ` Wu, Feng
2015-09-22 10:43 ` George Dunlap
2015-09-22 10:46 ` George Dunlap
2015-09-22 13:25 ` Wu, Feng
2015-09-22 13:40 ` Dario Faggioli
2015-09-22 13:52 ` Wu, Feng
2015-09-22 14:15 ` George Dunlap
2015-09-22 14:38 ` Dario Faggioli
2015-09-23 5:52 ` Wu, Feng
2015-09-23 7:59 ` Dario Faggioli
2015-09-23 8:11 ` Wu, Feng
2015-09-22 14:28 ` George Dunlap
2015-09-23 5:37 ` Wu, Feng
2015-09-21 5:09 Wu, Feng
2015-09-21 9:54 ` George Dunlap
2015-09-21 12:22 ` Wu, Feng
2015-09-21 14:24 ` Dario Faggioli
2015-09-22 7:19 ` Wu, Feng
2015-09-22 8:59 ` Jan Beulich
2015-09-22 13:40 ` Wu, Feng
2015-09-22 14:01 ` Jan Beulich
2015-09-23 9:44 ` George Dunlap
2015-09-23 12:35 ` Wu, Feng
2015-09-23 15:25 ` George Dunlap
2015-09-23 15:38 ` Jan Beulich
2015-09-24 1:50 ` Wu, Feng
2015-09-24 3:35 ` Dario Faggioli
2015-09-24 7:51 ` Jan Beulich
2015-09-24 8:03 ` Wu, Feng
2015-09-22 10:26 ` George Dunlap
2015-09-23 6:35 ` Wu, Feng
2015-09-23 7:11 ` Dario Faggioli
2015-09-23 7:20 ` Wu, Feng
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