xen-devel.lists.xenproject.org archive mirror
 help / color / mirror / Atom feed
From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xen.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Jan Beulich <JBeulich@suse.com>,
	Andy Lutomirski <luto@amacapital.net>
Subject: [PATCH 0/2] XSA-171 Followup work
Date: Wed, 16 Mar 2016 20:05:47 +0000	[thread overview]
Message-ID: <1458158749-21846-1-git-send-email-andrew.cooper3@citrix.com> (raw)

Investigating XSA-171 highlighted how useless the viopl interface for PV
guests actually is.  The value can only be set; it can't be queried, and will
go wrong if a 64bit guest kernel programs it with the cpl found in its
exception frames.

Introduce a better alternative.

Andrew Cooper (2):
  xen/x86: Don't hold TRAPBOUNCE_flags in %cl during create_bounce_frame
  xen/x86: Introduce a new VMASSIST for architectural behaviour of iopl

 xen/arch/x86/domain.c              | 10 +++++++---
 xen/arch/x86/physdev.c             |  2 +-
 xen/arch/x86/traps.c               |  8 ++++++--
 xen/arch/x86/x86_64/asm-offsets.c  |  3 +++
 xen/arch/x86/x86_64/compat/entry.S | 12 ++++++++----
 xen/arch/x86/x86_64/compat/traps.c |  4 ++++
 xen/arch/x86/x86_64/entry.S        | 12 ++++++++----
 xen/arch/x86/x86_64/traps.c        |  3 +++
 xen/include/asm-x86/config.h       |  1 +
 xen/include/asm-x86/domain.h       |  3 ++-
 xen/include/public/xen.h           |  8 ++++++++
 11 files changed, 51 insertions(+), 15 deletions(-)

-- 
2.1.4


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

             reply	other threads:[~2016-03-16 20:05 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-16 20:05 Andrew Cooper [this message]
2016-03-16 20:05 ` [PATCH 1/2] xen/x86: Don't hold TRAPBOUNCE_flags in %cl during create_bounce_frame Andrew Cooper
2016-03-16 20:05 ` [PATCH 2/2] xen/x86: Introduce a new VMASSIST for architectural behaviour of iopl Andrew Cooper
2016-03-17 10:25   ` Jan Beulich
2016-03-17 10:45     ` Andrew Cooper
2016-03-17 11:00       ` Jan Beulich
2016-03-17 11:05         ` Andrew Cooper

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=1458158749-21846-1-git-send-email-andrew.cooper3@citrix.com \
    --to=andrew.cooper3@citrix.com \
    --cc=JBeulich@suse.com \
    --cc=luto@amacapital.net \
    --cc=xen-devel@lists.xen.org \
    --subject='Re: [PATCH 0/2] XSA-171 Followup work' \
    /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

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).