All of lore.kernel.org
 help / color / mirror / Atom feed
From: Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
To: Jan Kiszka <jan.kiszka@siemens.com>, kvm@vger.kernel.org
Subject: Re: Nested paging in nested SVM setup
Date: Thu, 19 Jun 2014 11:03:59 +0600	[thread overview]
Message-ID: <53A26F3F.6020504@gmail.com> (raw)
In-Reply-To: <53A18A6D.2050407@siemens.com>

Hi all,

> If we want to provide useful nested SVM support, this must be feasible.
> If there is a bug, it has to be fixed.
I did a quick look on KVM sources this morning, and although I can be 
wrong, this really looks like a bug.

The reason is nested_svm_vmrun() doesn't do anything to host or guest 
PATs (thus no easy way to set memory type if NPT is used and guest PAT 
has non-default value). And since svm_set_cr0() explicitly clears CD 
(for a good reason, I suppose), there seem to be no way to control 
caching from the nested setup altogether.

--
Regards,
Valentine Sinitsyn

  parent reply	other threads:[~2014-06-19  5:04 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-18 11:36 Nested paging in nested SVM setup Valentine Sinitsyn
2014-06-18 12:47 ` Jan Kiszka
2014-06-18 16:59   ` Valentine Sinitsyn
2014-06-19  9:32     ` Paolo Bonzini
2014-06-19  5:03   ` Valentine Sinitsyn [this message]
2014-08-20  6:46   ` Valentine Sinitsyn
2014-08-20  6:55     ` Paolo Bonzini
2014-08-20  7:37       ` Valentine Sinitsyn
2014-08-20  8:11         ` Paolo Bonzini
2014-08-20  9:49           ` Valentine Sinitsyn
2014-08-21  6:28           ` Valentine Sinitsyn
2014-08-21  8:48             ` Valentine Sinitsyn
2014-08-21 11:04               ` Paolo Bonzini
2014-08-21 11:06                 ` Jan Kiszka
2014-08-21 11:12                   ` Valentine Sinitsyn
2014-08-21 11:16                 ` Valentine Sinitsyn
2014-08-21 11:24               ` Paolo Bonzini
2014-08-21 12:28                 ` Valentine Sinitsyn
2014-08-21 12:38                   ` Valentine Sinitsyn
2014-08-21 13:40                   ` Valentine Sinitsyn
2014-09-01 17:41                   ` Paolo Bonzini
2014-09-01 19:21                     ` Valentine Sinitsyn
2014-09-02  8:25                       ` Paolo Bonzini
2014-09-02  9:16                         ` Valentine Sinitsyn
2014-09-02 11:21                           ` Paolo Bonzini
2014-09-02 11:26                             ` Valentine Sinitsyn
2014-08-21 17:35                 ` Valentine Sinitsyn
2014-08-21 20:31                   ` Paolo Bonzini
2014-08-22  4:33                     ` Valentine Sinitsyn
2014-08-22  8:53                       ` Paolo Bonzini
2014-09-01 16:11                       ` Paolo Bonzini
2014-09-01 17:04     ` Paolo Bonzini
2014-09-02  6:09       ` Valentine Sinitsyn
2014-09-02  6:21         ` Valentine Sinitsyn
2014-09-02  9:45         ` Paolo Bonzini
2014-09-02  9:53           ` Valentine Sinitsyn
2014-09-02 11:48             ` Paolo Bonzini
2014-09-02 10:31           ` Valentine Sinitsyn

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=53A26F3F.6020504@gmail.com \
    --to=valentine.sinitsyn@gmail.com \
    --cc=jan.kiszka@siemens.com \
    --cc=kvm@vger.kernel.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.