From: Anthony Liguori <aliguori@us.ibm.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Avi Kivity <avi@redhat.com>, kvm-devel <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant
Date: Mon, 12 Oct 2009 08:44:56 -0500 [thread overview]
Message-ID: <4AD332D8.8080903@us.ibm.com> (raw)
In-Reply-To: <20091011143946.GP16702@redhat.com>
Gleb Natapov wrote
>> BTW, I don't think it's write-protected and it probably should be?
>>
>>
> AFAIR it is not writable on plain qemu.
>
KVM wants it to be writable for the TPR optimization. Historically, it
was read-only in QEMU but it changed to read-write in order to fake
coreboot into thinking that the bios implemented PMM which it doesn't.
--
Regards,
Anthony Liguori
WARNING: multiple messages have this Message-ID (diff)
From: Anthony Liguori <aliguori@us.ibm.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Avi Kivity <avi@redhat.com>, kvm-devel <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant
Date: Mon, 12 Oct 2009 08:44:56 -0500 [thread overview]
Message-ID: <4AD332D8.8080903@us.ibm.com> (raw)
In-Reply-To: <20091011143946.GP16702@redhat.com>
Gleb Natapov wrote
>> BTW, I don't think it's write-protected and it probably should be?
>>
>>
> AFAIR it is not writable on plain qemu.
>
KVM wants it to be writable for the TPR optimization. Historically, it
was read-only in QEMU but it changed to read-write in order to fake
coreboot into thinking that the bios implemented PMM which it doesn't.
--
Regards,
Anthony Liguori
next prev parent reply other threads:[~2009-10-12 13:44 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1255013225.git.mst@redhat.com>
2009-10-08 14:52 ` [PATCH 1/3] pc-bios: enable io/memory unconditionally Michael S. Tsirkin
2009-10-08 14:52 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-08 14:52 ` [PATCH 2/3] qemu: make cirrus init value pci spec compliant Michael S. Tsirkin
2009-10-08 14:52 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-08 15:29 ` Avi Kivity
2009-10-08 15:29 ` [Qemu-devel] " Avi Kivity
2009-10-08 16:06 ` Michael S. Tsirkin
2009-10-08 16:06 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-08 16:13 ` Avi Kivity
2009-10-08 16:13 ` [Qemu-devel] " Avi Kivity
2009-10-08 18:40 ` Jamie Lokier
2009-10-08 18:40 ` Jamie Lokier
2009-10-08 19:39 ` Michael S. Tsirkin
2009-10-08 19:39 ` Michael S. Tsirkin
2009-10-09 6:43 ` Michael S. Tsirkin
2009-10-09 6:43 ` Michael S. Tsirkin
2009-10-09 7:00 ` Gleb Natapov
2009-10-09 7:00 ` Gleb Natapov
2009-10-09 10:13 ` Michael S. Tsirkin
2009-10-09 10:13 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-09 11:49 ` Gleb Natapov
2009-10-09 11:49 ` Gleb Natapov
2009-10-09 12:59 ` Michael S. Tsirkin
2009-10-09 12:59 ` Michael S. Tsirkin
2009-10-09 15:08 ` Gleb Natapov
2009-10-09 15:08 ` Gleb Natapov
2009-10-12 13:45 ` Gerd Hoffmann
2009-10-12 13:45 ` Gerd Hoffmann
2009-10-12 13:53 ` Gleb Natapov
2009-10-12 13:53 ` Gleb Natapov
2009-10-12 14:50 ` Gerd Hoffmann
2009-10-12 14:50 ` Gerd Hoffmann
2009-10-12 14:52 ` Gleb Natapov
2009-10-12 14:52 ` Gleb Natapov
2009-10-12 15:21 ` Jamie Lokier
2009-10-12 15:21 ` Jamie Lokier
2009-10-12 15:43 ` Gerd Hoffmann
2009-10-12 15:43 ` [Qemu-devel] " Gerd Hoffmann
2009-10-12 16:57 ` Michael S. Tsirkin
2009-10-12 16:57 ` Michael S. Tsirkin
2009-10-09 11:37 ` Jamie Lokier
2009-10-09 11:37 ` Jamie Lokier
2009-10-09 11:54 ` Gleb Natapov
2009-10-09 11:54 ` Gleb Natapov
2009-10-11 13:36 ` Michael S. Tsirkin
2009-10-11 13:36 ` Michael S. Tsirkin
2009-10-11 13:45 ` Gleb Natapov
2009-10-11 13:45 ` Gleb Natapov
2009-10-11 13:52 ` Michael S. Tsirkin
2009-10-11 13:52 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-11 13:57 ` Gleb Natapov
2009-10-11 13:57 ` Gleb Natapov
2009-10-11 14:35 ` Michael S. Tsirkin
2009-10-11 14:35 ` Michael S. Tsirkin
2009-10-11 14:39 ` Gleb Natapov
2009-10-11 14:39 ` Gleb Natapov
2009-10-11 14:45 ` Michael S. Tsirkin
2009-10-11 14:45 ` Michael S. Tsirkin
2009-10-11 15:00 ` Gleb Natapov
2009-10-11 15:00 ` [Qemu-devel] " Gleb Natapov
2009-10-12 13:44 ` Anthony Liguori [this message]
2009-10-12 13:44 ` Anthony Liguori
2009-10-12 14:21 ` Gleb Natapov
2009-10-12 14:21 ` Gleb Natapov
2009-10-12 14:31 ` Anthony Liguori
2009-10-12 14:31 ` Anthony Liguori
2009-10-12 15:00 ` Kevin O'Connor
2009-10-12 15:00 ` Kevin O'Connor
2009-10-11 14:42 ` Avi Kivity
2009-10-11 14:42 ` Avi Kivity
2009-10-11 14:44 ` Michael S. Tsirkin
2009-10-11 14:44 ` Michael S. Tsirkin
2009-10-11 14:53 ` Avi Kivity
2009-10-11 14:53 ` Avi Kivity
2009-10-11 16:12 ` Michael S. Tsirkin
2009-10-11 16:12 ` Michael S. Tsirkin
2009-10-11 16:24 ` Avi Kivity
2009-10-11 16:24 ` Avi Kivity
2009-10-11 16:33 ` Michael S. Tsirkin
2009-10-11 16:33 ` Michael S. Tsirkin
2009-10-11 16:37 ` Avi Kivity
2009-10-11 16:37 ` Avi Kivity
2009-10-11 16:39 ` Michael S. Tsirkin
2009-10-11 16:39 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-11 16:48 ` Avi Kivity
2009-10-11 16:48 ` [Qemu-devel] " Avi Kivity
2009-10-11 17:18 ` Michael S. Tsirkin
2009-10-11 17:18 ` Michael S. Tsirkin
2009-10-11 17:27 ` Avi Kivity
2009-10-11 17:27 ` Avi Kivity
2009-10-11 17:28 ` Avi Kivity
2009-10-11 17:28 ` Avi Kivity
2009-10-11 18:10 ` Michael S. Tsirkin
2009-10-11 18:10 ` Michael S. Tsirkin
2009-10-11 20:41 ` Avi Kivity
2009-10-11 20:41 ` Avi Kivity
2009-10-08 14:52 ` [PATCH 3/3] qemu: cleanup unused macros in cirrus Michael S. Tsirkin
2009-10-08 14:52 ` [Qemu-devel] " Michael S. Tsirkin
2009-10-08 15:24 ` Juan Quintela
2009-10-08 16:07 ` Michael S. Tsirkin
2009-10-08 16:07 ` [Qemu-devel] " Michael S. Tsirkin
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=4AD332D8.8080903@us.ibm.com \
--to=aliguori@us.ibm.com \
--cc=avi@redhat.com \
--cc=gleb@redhat.com \
--cc=kvm@vger.kernel.org \
--cc=mst@redhat.com \
--cc=qemu-devel@nongnu.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 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.