From: Jan Beulich <jbeulich@suse.com>
To: Alexandru Stefan ISAILA <aisaila@bitdefender.com>
Cc: "Kevin Tian" <kevin.tian@intel.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Julien Grall" <julien@xen.org>, "Wei Liu" <wl@xen.org>,
"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
"George Dunlap" <George.Dunlap@eu.citrix.com>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Ian Jackson" <ian.jackson@eu.citrix.com>,
"Jun Nakajima" <jun.nakajima@intel.com>,
"xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH V6] x86/altp2m: Hypercall to set altp2m view visibility
Date: Tue, 3 Mar 2020 16:29:32 +0100 [thread overview]
Message-ID: <14bca4bc-5e03-8ca9-74e1-88e27609b8b7@suse.com> (raw)
In-Reply-To: <20200303122240.27013-1-aisaila@bitdefender.com>
On 03.03.2020 13:23, Alexandru Stefan ISAILA wrote:
> At this moment a guest can call vmfunc to change the altp2m view. This
> should be limited in order to avoid any unwanted view switch.
>
> The new xc_altp2m_set_visibility() solves this by making views invisible
> to vmfunc.
> This is done by having a separate arch.altp2m_working_eptp that is
> populated and made invalid in the same places as altp2m_eptp. This is
> written to EPTP_LIST_ADDR.
> The views are made in/visible by marking them with INVALID_MFN or
> copying them back from altp2m_eptp.
> To have consistency the visibility also applies to
> p2m_switch_domain_altp2m_by_id().
>
> Note: If altp2m mode is set to mixed the guest is able to change the view
> visibility and then call vmfunc.
>
> Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Hypervisor parts
Reviewed-by: Jan Beulich <jbeulich@suse.com>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2020-03-03 15:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-03 12:23 [Xen-devel] [PATCH V6] x86/altp2m: Hypercall to set altp2m view visibility Alexandru Stefan ISAILA
2020-03-03 15:29 ` Jan Beulich [this message]
2020-03-04 13:57 ` Alexandru Stefan ISAILA
2020-03-04 14:07 ` Jan Beulich
2020-03-04 14:12 ` Alexandru Stefan ISAILA
2020-03-04 14:28 ` Alexandru Stefan ISAILA
2020-03-10 2:04 ` Tian, Kevin
2020-03-24 10:46 ` Isaila Alexandru
2020-03-27 2:30 ` Tian, Kevin
2020-03-30 6:25 ` Isaila Alexandru
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=14bca4bc-5e03-8ca9-74e1-88e27609b8b7@suse.com \
--to=jbeulich@suse.com \
--cc=George.Dunlap@eu.citrix.com \
--cc=aisaila@bitdefender.com \
--cc=andrew.cooper3@citrix.com \
--cc=ian.jackson@eu.citrix.com \
--cc=julien@xen.org \
--cc=jun.nakajima@intel.com \
--cc=kevin.tian@intel.com \
--cc=konrad.wilk@oracle.com \
--cc=roger.pau@citrix.com \
--cc=sstabellini@kernel.org \
--cc=wl@xen.org \
--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).