From: Peter Xu <peterx@redhat.com>
To: Pavel Dovgalyuk <dovgaluk@ispras.ru>
Cc: ehabkost@redhat.com, quintela@redhat.com, dgilbert@redhat.com,
qemu-devel@nongnu.org, pbonzini@redhat.com, rth@twiddle.net
Subject: Re: [Qemu-devel] i386: EFER vs 32-bit CPU
Date: Thu, 30 May 2019 08:52:43 +0800 [thread overview]
Message-ID: <20190530005243.GA28587@xz-x1> (raw)
In-Reply-To: <003a01d51611$6251a2b0$26f4e810$@ru>
On Wed, May 29, 2019 at 02:26:39PM +0300, Pavel Dovgalyuk wrote:
> Hello!
>
>
>
> I found this while debugging the inconsistent saved/restored state of the virtual machine.
>
>
>
> i386 (32 bit) emulation uses this register (in wrmsr and in MMU fault processing).
Sorry if this question is elementary, but... why would a 32bit guest
use IA32_EFER? From SDM I only see 4 bits defined in this MSR (SCE,
LME, LMA, NXE) but is there any of them that should be set in a 32bit
guest?
Regards,
--
Peter Xu
next prev parent reply other threads:[~2019-05-30 0:53 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-29 11:26 [Qemu-devel] i386: EFER vs 32-bit CPU Pavel Dovgalyuk
2019-05-29 11:30 ` Dr. David Alan Gilbert
2019-05-29 11:39 ` Paolo Bonzini
2019-05-29 11:53 ` Pavel Dovgalyuk
2019-05-29 12:36 ` Dr. David Alan Gilbert
2019-05-29 14:03 ` Pavel Dovgalyuk
2019-05-30 0:52 ` Peter Xu [this message]
2019-05-30 5:54 ` Pavel Dovgalyuk
2019-05-30 9:00 ` Peter Xu
2019-05-30 9:04 ` Peter Xu
2019-05-30 11:00 ` TeLeMan
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=20190530005243.GA28587@xz-x1 \
--to=peterx@redhat.com \
--cc=dgilbert@redhat.com \
--cc=dovgaluk@ispras.ru \
--cc=ehabkost@redhat.com \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=quintela@redhat.com \
--cc=rth@twiddle.net \
/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.