From: "Jan Beulich" <JBeulich@suse.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH 2/2] hvmloader: don't hard-code IO-APIC parameters
Date: Fri, 17 Jun 2016 00:00:19 -0600 [thread overview]
Message-ID: <5763AE1302000078000F5E2F@prv-mh.provo.novell.com> (raw)
In-Reply-To: <5762D8A7.3010205@oracle.com>
>>> On 16.06.16 at 18:49, <boris.ostrovsky@oracle.com> wrote:
> On 06/16/2016 05:40 AM, Jan Beulich wrote:
>> The IO-APIC address has variable bits determined by the PCI-to-ISA
>> bridge, and the IO-APIC version should be read from the IO-APIC. (Note
>> that there's still implicit rather than explicit agreement on the
>> IO-APIC base address between qemu and the hypervisor.)
>
> It probably doesn't matter now for PVHv2 since we are not going to
> initially emulate IOAPIC but when/if we do, how do we query for base
> address and version? Should we just rely on the same implicit agreement?
If this refers to the sentence in parentheses, then this was really
meant to indicate a work item. I.e. qemu should negotiate with
Xen. For PVHv2 this would then probably mean for hvmloader to
query Xen (via new hypercall).
Jan
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-06-17 6:00 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 9:33 [PATCH 0/2] x86: hvmloader improvements Jan Beulich
2016-06-16 9:40 ` [PATCH 1/2] hvmloader: limit CPUs exposed to guests Jan Beulich
2016-06-16 15:09 ` Boris Ostrovsky
2016-06-16 15:25 ` Jan Beulich
2016-06-16 15:37 ` Boris Ostrovsky
2016-06-16 16:04 ` Jan Beulich
2016-06-16 16:38 ` Boris Ostrovsky
2016-06-17 9:40 ` Andrew Cooper
2016-06-16 9:40 ` [PATCH 2/2] hvmloader: don't hard-code IO-APIC parameters Jan Beulich
2016-06-16 16:49 ` Boris Ostrovsky
2016-06-17 6:00 ` Jan Beulich [this message]
2016-06-17 11:51 ` Boris Ostrovsky
2016-06-17 14:26 ` Jan Beulich
2016-06-17 10:05 ` Andrew Cooper
2016-06-17 10:23 ` Jan Beulich
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=5763AE1302000078000F5E2F@prv-mh.provo.novell.com \
--to=jbeulich@suse.com \
--cc=andrew.cooper3@citrix.com \
--cc=boris.ostrovsky@oracle.com \
--cc=xen-devel@lists.xenproject.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).