From: Jan Beulich <jbeulich@suse.com>
To: Juergen Gross <jgross@suse.com>
Cc: "Stefano Stabellini" <sstabellini@kernel.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>,
"Tim Deegan" <tim@xen.org>, "Julien Grall" <julien.grall@arm.com>,
xen-devel@lists.xenproject.org,
"Volodymyr Babchuk" <Volodymyr_Babchuk@epam.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [RFC PATCH 0/5] Add hypervisor sysfs-like support
Date: Wed, 11 Sep 2019 11:24:22 +0200 [thread overview]
Message-ID: <c29e4609-5948-760d-2143-75d51e42d36d@suse.com> (raw)
In-Reply-To: <20190911062001.25931-1-jgross@suse.com>
On 11.09.2019 08:19, Juergen Gross wrote:
> On the 2019 Xen developer summit there was agreement that the Xen
> hypervisor should gain support for a hierarchical name-value store
> similar to the Linux kernel's sysfs.
>
> This is a first implementation of that idea adding the basic
> functionality to hypervisor and tools side. The interface to any
> user program making use of that "xen-sysfs" is a new library
> "libxenfs" with a stable interface.
>
> There are still some pending questions, those are:
>
> - access rights:
> + should we allow access to dom0 only, or to all domains, or should
> that be possible to set per entry?
Dom0 only for now, I'd say. But if possible don't put in road blocks
making relaxing this more difficult.
> + how to integrate with xsm?
When Dom0 only, perhaps not needed more than wiring this through the
same hook as e.g. the sysctl-s use?
> - dynamical entries:
> + do we want support for e.g. per-domain and/or per-cpupool entries?
Down the road - perhaps.
> + do we want support for debug aids (lock-profiling, debugtrace ..)?
Seeing you introduce a file system abstraction, have such go through
a debugfs-like one?
> - write access:
> + runtime parameters?
> + debugging aids?
For both - down the road, perhaps.
Jan
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next prev parent reply other threads:[~2019-09-11 9:25 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-11 6:19 [Xen-devel] [RFC PATCH 0/5] Add hypervisor sysfs-like support Juergen Gross
2019-09-11 6:19 ` [Xen-devel] [RFC PATCH 1/5] docs: add feature document for Xen " Juergen Gross
2019-09-11 9:28 ` Jan Beulich
2019-09-11 9:29 ` Juergen Gross
2019-09-11 6:19 ` [Xen-devel] [RFC PATCH 2/5] xen: add basic hypervisor filesystem support Juergen Gross
2019-09-11 6:19 ` [Xen-devel] [RFC PATCH 3/5] libs: add libxenfs Juergen Gross
2019-09-11 6:20 ` [Xen-devel] [RFC PATCH 4/5] tools: add xenfs tool Juergen Gross
2019-09-11 9:30 ` Jan Beulich
2019-09-11 9:57 ` Juergen Gross
2019-09-11 10:07 ` Jan Beulich
2019-09-11 11:34 ` Juergen Gross
2019-09-11 11:50 ` Jan Beulich
2019-09-11 12:41 ` Juergen Gross
2019-09-11 6:20 ` [Xen-devel] [RFC PATCH 5/5] xen: add /buildinfo/config entry to hypervisor filesystem Juergen Gross
2019-09-11 9:24 ` Jan Beulich [this message]
2019-09-11 10:02 ` [Xen-devel] [RFC PATCH 0/5] Add hypervisor sysfs-like support Juergen Gross
2019-09-11 11:17 ` Andrew Cooper
2019-09-11 11:29 ` Juergen Gross
2019-09-11 11:54 ` Jan Beulich
2019-09-11 13:01 ` Juergen Gross
2019-09-11 15:01 ` Jan Beulich
2019-09-11 15:06 ` Juergen Gross
2019-09-11 15:20 ` Jan Beulich
2019-09-11 15:26 ` Juergen Gross
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