From: Vasilis Liaskovitis <vliaskovitis@suse.com>
To: xen-devel@lists.xenproject.org
Cc: jgross@suse.com, sstabellini@kernel.org, wei.liu2@citrix.com,
jbeulich@suse.com, George.Dunlap@eu.citrix.com,
andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com,
tim@xen.org, vliaskovitis@suse.com, dgdegra@tycho.nsa.gov
Subject: [PATCH v2 0/4] Support for reading hypervisor parameters at runtime
Date: Fri, 22 Mar 2019 20:28:05 +0100 [thread overview]
Message-ID: <20190322192809.3002-1-vliaskovitis@suse.com> (raw)
Currently parameters of the hypervisor cannot be inspected at runtime
through an xl command. Such a command would be a useful diagnostic
tool e.g. used in conjunction with the "xl set-parameters" command.
This patch series implements a new xl command "xl get-parameters"
which takes a string of input parameters and returns their current
values in the hypervisor settings.
Changes v1->v2:
- fixed snprintf issues, fixed memory leaks and error handling
- removed unnecessary wrapper function
- OPT_SIZE is handled
Limitations:
- Custom runtime parameters (OPT_CUSTOM) are not supported yet. I'd like
to do this in a follow-up series. See also discussion at
https://lists.xenproject.org/archives/html/xen-devel/2019-03/msg01383.html
- For integer parameters (OPT_UINT), only unsigned parameters are printed
correctly at the moment.
Examples:
xl get-parameters "gnttab_max_frames gnttab_max_maptrack_frames"
gnttab_max_frames gnttab_max_maptrack_frames : 64 1024
xl set-parameters gnttab_max_frames=128
xl get-parameters gnttab_max_frames
gnttab_max_frames : 128
xl get-parameters "gnttab_max_frames gnttab_max_maptrack_frames"
gnttab_max_frames gnttab_max_maptrack_frames : 128 1024
Vasilis Liaskovitis (4):
xen: add hypercall for getting parameters at runtime
libxc: add function to get hypervisor parameters
libxl: add libxl_get_parameters() function
xl: add new xl command get-parameters
docs/man/xl.1.pod.in | 5 ++
tools/flask/policy/modules/dom0.te | 2 +-
tools/libxc/include/xenctrl.h | 1 +
tools/libxc/xc_misc.c | 26 +++++++
tools/libxl/libxl.c | 15 ++++
tools/libxl/libxl.h | 1 +
tools/xl/xl.h | 1 +
tools/xl/xl_cmdtable.c | 5 ++
tools/xl/xl_misc.c | 25 +++++++
xen/common/kernel.c | 102 ++++++++++++++++++++++++++++
xen/common/sysctl.c | 55 ++++++++++++++-
xen/include/public/sysctl.h | 18 +++++
xen/include/xen/lib.h | 1 +
xen/xsm/flask/hooks.c | 3 +
xen/xsm/flask/policy/access_vectors | 2 +
15 files changed, 259 insertions(+), 3 deletions(-)
--
2.20.1
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next reply other threads:[~2019-03-22 19:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-22 19:28 Vasilis Liaskovitis [this message]
2019-03-22 19:28 ` [PATCH v2 1/4] xen: add hypercall for getting parameters at runtime Vasilis Liaskovitis
2019-04-05 15:01 ` Jan Beulich
2019-04-05 15:01 ` [Xen-devel] " Jan Beulich
[not found] ` <5CA76DE50200007800224E9C@suse.com>
2019-04-30 19:05 ` Vasilis Liaskovitis
2019-04-30 19:05 ` [Xen-devel] " Vasilis Liaskovitis
2019-05-02 7:36 ` Jan Beulich
2019-05-02 7:36 ` [Xen-devel] " Jan Beulich
2019-03-22 19:28 ` [PATCH v2 2/4] libxc: add function to get hypervisor parameters Vasilis Liaskovitis
2019-03-22 19:28 ` [PATCH v2 3/4] libxl: add libxl_get_parameters() function Vasilis Liaskovitis
2019-03-22 19:28 ` [PATCH v2 4/4] xl: add new xl command get-parameters Vasilis Liaskovitis
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