From: Dario Faggioli <dario.faggioli@citrix.com>
To: Feng Wu <feng.wu@intel.com>, xen-devel@lists.xen.org
Cc: Kevin Tian <kevin.tian@intel.com>, Keir Fraser <keir@xen.org>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Jan Beulich <jbeulich@suse.com>,
Yang Zhang <yang.z.zhang@intel.com>
Subject: Re: [PATCH v8 01/17] VT-d Posted-intterrupt (PI) design
Date: Thu, 29 Oct 2015 16:56:42 +0100 [thread overview]
Message-ID: <1446134202.28782.78.camel@citrix.com> (raw)
In-Reply-To: <1444640103-4685-2-git-send-email-feng.wu@intel.com>
[-- Attachment #1.1: Type: text/plain, Size: 2225 bytes --]
On Mon, 2015-10-12 at 16:54 +0800, Feng Wu wrote:
> diff --git a/docs/misc/vtd-pi.txt b/docs/misc/vtd-pi.txt
> new file mode 100644
> index 0000000..af5409a
> --- /dev/null
> +++ b/docs/misc/vtd-pi.txt
> @@ -0,0 +1,332 @@
> +Authors: Feng Wu <feng.wu@intel.com>
> +
> +VT-d Posted-interrupt (PI) design for XEN
> +
And one thing about this too...
> +- Update posted-interrupt descriptor during vCPU scheduling
> +
> +The basic idea here is:
> +1. When vCPU's state is RUNSTATE_running,
> + - Set 'NV' to 'posted_intr_vector'.
> + - Clear 'SN' to accept posted-interrupts.
> + - Set 'NDST' to the pCPU on which the vCPU will be running.
> +2. When vCPU's state is RUNSTATE_blocked,
> + - Set 'NV' to ' pi_wakeup_vector ', so we can wake up the
> + related vCPU when posted-interrupt happens for it.
> + Please refer to the above section about the new global
> vector.
> + - Clear 'SN' to accept posted-interrupts
> +3. When vCPU's state is RUNSTATE_runnable/RUNSTATE_offline,
> + - Set 'SN' to suppress non-urgent interrupts
> + (Currently, we only support non-urgent interrupts)
> + When vCPU is in RUNSTATE_runnable or RUNSTATE_offline
> + It is not needed to accept posted-interrupt notification
> event
> + since we don't change the behavior of scheduler when the
> interrupt
> + occurs, we still need wait for the next scheduling of the
> vCPU.
> + When external interrupts from assigned devices occur, the
> interrupts
> + are recorded in PIR, and will be synced to IRR before VM
> -Entry.
> + - Set 'NV' to 'posted_intr_vector'.
> +
This still describe the old structure, based on RUNSTATEs, from which
we've moved away. Please, either make it more general, or update it so
that it reflects the actual implementation (hooks and VMX enrty/exit
handlers), or both. :-)
Regards,
Dario
--
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
[-- Attachment #1.2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 181 bytes --]
[-- Attachment #2: Type: text/plain, Size: 126 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2015-10-29 15:56 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-12 8:54 [PATCH v8 00/17] Add VT-d Posted-Interrupts support Feng Wu
2015-10-12 8:54 ` [PATCH v8 01/17] VT-d Posted-intterrupt (PI) design Feng Wu
2015-10-12 10:41 ` Andrew Cooper
2015-10-13 0:53 ` Wu, Feng
2015-10-29 15:56 ` Dario Faggioli [this message]
2015-10-12 8:54 ` [PATCH v8 02/17] Add cmpxchg16b support for x86-64 Feng Wu
2015-10-13 15:29 ` Jan Beulich
2015-10-14 5:57 ` Wu, Feng
2015-10-14 9:05 ` Jan Beulich
2015-10-14 9:29 ` Wu, Feng
2015-10-14 9:45 ` Jan Beulich
2015-10-14 10:03 ` Wu, Feng
2015-10-14 10:21 ` Jan Beulich
2015-10-14 10:25 ` Wu, Feng
2015-10-12 8:54 ` [PATCH v8 03/17] iommu: Add iommu_intpost to control VT-d Posted-Interrupts feature Feng Wu
2015-10-12 8:54 ` [PATCH v8 04/17] vt-d: VT-d Posted-Interrupts feature detection Feng Wu
2015-10-12 8:54 ` [PATCH v8 05/17] vmx: Extend struct pi_desc to support VT-d Posted-Interrupts Feng Wu
2015-10-12 8:54 ` [PATCH v8 06/17] vmx: Add some helper functions for Posted-Interrupts Feng Wu
2015-10-12 8:54 ` [PATCH v8 07/17] vmx: Initialize VT-d Posted-Interrupts Descriptor Feng Wu
2015-10-12 8:54 ` [PATCH v8 08/17] vmx: Suppress posting interrupts when 'SN' is set Feng Wu
2015-10-12 8:54 ` [PATCH v8 09/17] VT-d: Remove pointless casts Feng Wu
2015-10-12 8:54 ` [PATCH v8 10/17] vt-d: Extend struct iremap_entry to support VT-d Posted-Interrupts Feng Wu
2015-10-12 8:54 ` [PATCH v8 11/17] vt-d: Add API to update IRTE when VT-d PI is used Feng Wu
2015-10-12 8:54 ` [PATCH v8 12/17] x86: move some APIC related macros to apicdef.h Feng Wu
2015-10-12 8:54 ` [PATCH v8 13/17] Update IRTE according to guest interrupt config changes Feng Wu
2015-10-12 8:55 ` [PATCH v8 14/17] vmx: Properly handle notification event when vCPU is running Feng Wu
2015-10-12 8:55 ` [PATCH v8 15/17] vmx: VT-d posted-interrupt core logic handling Feng Wu
2015-10-26 14:39 ` Dario Faggioli
2015-10-27 5:19 ` Wu, Feng
2015-10-27 9:51 ` Jan Beulich
2015-10-28 1:50 ` Dario Faggioli
2015-10-28 2:58 ` Wu, Feng
2015-10-28 9:03 ` Jan Beulich
2015-10-28 16:36 ` Dario Faggioli
2015-10-29 5:39 ` Wu, Feng
2015-10-29 9:26 ` Dario Faggioli
2015-10-29 14:07 ` Wu, Feng
2015-10-27 12:16 ` Dario Faggioli
2015-10-28 2:40 ` Wu, Feng
2015-10-27 12:22 ` Dario Faggioli
2015-10-12 8:55 ` [PATCH v8 16/17] VT-d: Dump the posted format IRTE Feng Wu
2015-10-12 8:55 ` [PATCH v8 17/17] Add a command line parameter for VT-d posted-interrupts Feng Wu
2015-10-23 2:12 ` [PATCH v8 00/17] Add VT-d Posted-Interrupts support Wu, Feng
2015-10-23 8:13 ` Jan Beulich
2015-10-23 8:35 ` Wu, Feng
2015-10-23 8:46 ` Dario Faggioli
2015-10-23 8:52 ` Wu, Feng
2015-10-29 10:51 ` Dario Faggioli
2015-10-29 14:05 ` Wu, Feng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1446134202.28782.78.camel@citrix.com \
--to=dario.faggioli@citrix.com \
--cc=andrew.cooper3@citrix.com \
--cc=feng.wu@intel.com \
--cc=george.dunlap@eu.citrix.com \
--cc=jbeulich@suse.com \
--cc=keir@xen.org \
--cc=kevin.tian@intel.com \
--cc=xen-devel@lists.xen.org \
--cc=yang.z.zhang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.