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From: Ian Jackson <ian.jackson@citrix.com>
To: Doug Goldstein <cardoe@cardoe.com>
Cc: Sergey Dyasli <sergey.dyasli@citrix.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien@xen.org>, Wei Liu <wl@xen.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Andrew Cooper <Andrew.Cooper3@citrix.com>,
	George Dunlap <George.Dunlap@citrix.com>,
	Xen-devel <xen-devel@lists.xen.org>,
	Jan Beulich <jbeulich@suse.com>,
	Daniel De Graaf <dgdegra@tycho.nsa.gov>
Subject: Re: [Xen-devel] [PATCH v2] xsm: hide detailed Xen version from unprivileged guests
Date: Mon, 13 Jan 2020 14:01:23 +0000	[thread overview]
Message-ID: <24092.30771.810775.973167@mariner.uk.xensource.com> (raw)
In-Reply-To: <68263b88-40b7-89d3-c962-6991c708dd89@cardoe.com>

Doug Goldstein writes ("Re: [Xen-devel] [PATCH v2] xsm: hide detailed Xen version from unprivileged guests"):
> I'd be happy if we had a Kconfig option behind what the string is. Give 
> me a blank as an option but default it to whatever string like 
> "<hidden>" that you'd like. Every shipping Xen distro I've worked on has 
> had its own v1 variant of the patch and none of them authored by me.

Firstly: I generally agree with George's comments about not liking
silent failure, and I disagree with Andrew.  My inclination would be
to have this string be "<hidden>" (or similar) - and to not filter it
in the DMI tables, so it would be "<hidden>" everywhere.

Doug, I can't figure out from your messages whether that would meet
your needs ?  Is George right that the reason for filtering what used
to be "<denied>" is simply to reduce support burden due to the
negative connotations of "denied" ?  Would "hidden" fix that ?

If I am wrong, what is the reason for the filtering ?

If we have to have this string be configurable then so be it but I
would rather see if we can find one thing that meets downstreams'
needs.

FTR I agree with many of the points you make and I understand why you
think this is frustrating.  I hope we can clear this up.

Ian.

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      parent reply	other threads:[~2020-01-13 14:01 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-10 10:37 Sergey Dyasli
2020-01-10 11:02 ` Andrew Cooper
2020-01-10 15:28   ` George Dunlap
2020-01-10 15:56     ` Jan Beulich
2020-01-10 16:45       ` Jürgen Groß
2020-01-10 17:00         ` George Dunlap
2020-01-11  3:55     ` Doug Goldstein
2020-01-11  9:35       ` George Dunlap
2020-01-13 11:01   ` Sergey Dyasli
2020-01-10 11:09 ` Jan Beulich
2020-01-11  4:02 ` Doug Goldstein
2020-01-11  9:02   ` George Dunlap
2020-01-12 18:26     ` Doug Goldstein
2020-01-13 12:51       ` George Dunlap
2020-01-13 13:39         ` Julien Grall
2020-01-13 14:01           ` Andrew Cooper
2020-01-13 14:07             ` George Dunlap
2020-01-13 14:28               ` Julien Grall
2020-01-13 14:40         ` Andrew Cooper
2020-01-14 10:19           ` Sergey Dyasli
2020-01-13 14:52         ` Julien Grall
2020-01-13 14:01       ` Ian Jackson [this message]

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