linux-kernel - Re: [PATCH v3 1/4] doc,xen: document hypervisor sysfs nodes for xen

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Date:   Wed, 14 Jun 2017 12:06:55 -0700 (PDT)
From:   Stefano Stabellini <sstabellini@...nel.org>
To:     Boris Ostrovsky <boris.ostrovsky@...cle.com>
cc:     Juergen Gross <jgross@...e.com>, linux-kernel@...r.kernel.org,
        xen-devel@...ts.xenproject.org, gregkh@...uxfoundation.org,
        Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH v3 1/4] doc,xen: document hypervisor sysfs nodes for
 xen

On Wed, 14 Jun 2017, Boris Ostrovsky wrote:
> + Stefano for ARM.
> 
> On 06/12/2017 10:21 AM, Juergen Gross wrote:
> > Today only a few sysfs nodes under /sys/hypervisor/ are documented
> > for Xen in Documentation/ABI/testing/sysfs-hypervisor-pmu.
> >
> > Add the remaining Xen sysfs nodes under /sys/hypervisor/ in a new
> > file Documentation/ABI/stable/sysfs-hypervisor-xen and add the Xen
> > specific sysfs docs to the MAINTAINERS file.
> >
> > Signed-off-by: Juergen Gross <jgross@...e.com>
> > ---
> > V3:
> >   - added hint for hidden values where appropriate (Andrew Cooper)
> >
> > V2:
> >   - rename file to Documentation/ABI/stable/sysfs-hypervisor-xen in
> >     order to reflect Xen dependency
> >   - leave pmu entries in old file under testing (Boris Ostrovsky)
> > ---
> >  Documentation/ABI/stable/sysfs-hypervisor-xen | 119 ++++++++++++++++++++++++++
> >  MAINTAINERS                                   |   2 +
> >  2 files changed, 121 insertions(+)
> >  create mode 100644 Documentation/ABI/stable/sysfs-hypervisor-xen
> >
> > diff --git a/Documentation/ABI/stable/sysfs-hypervisor-xen b/Documentation/ABI/stable/sysfs-hypervisor-xen
> > new file mode 100644
> > index 000000000000..e413154128b8
> > --- /dev/null
> > +++ b/Documentation/ABI/stable/sysfs-hypervisor-xen
> > @@ -0,0 +1,119 @@
> > +What:		/sys/hypervisor/compilation/compile_date
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Contains the build time stamp of the Xen hypervisor
> > +		Might return "<denied>" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/compilation/compiled_by
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Contains information who built the Xen hypervisor
> > +		Might return "<denied>" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/compilation/compiler
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Compiler which was used to build the Xen hypervisor
> > +		Might return "<denied>" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/properties/capabilities
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Space separated list of supported guest system types. Each type
> > +		is in the format: <class>-<major>.<minor>-<arch>
> > +		With:
> > +			<class>: "xen" -- x86: paravirtualized, arm: standard
> > +				 "hvm" -- x86 only: full virtualized
> 
> s/full/fully/
> 
> Other than that
> 
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>

Reviewed-by: Stefano Stabellini <sstabellini@...nel.org>


> > +			<major>: major guest interface version
> > +			<minor>: minor guest interface version
> > +			<arch>:  architecture, e.g.:
> > +				 "x86_32": 32 bit x86 guest without PAE
> > +				 "x86_32p": 32 bit x86 guest with PAE
> > +				 "x86_64": 64 bit x86 guest
> > +				 "armv7l": 32 bit arm guest
> > +				 "aarch64": 64 bit arm guest
> > +
> > +What:		/sys/hypervisor/properties/changeset
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Changeset of the hypervisor (git commit)
> > +		Might return "<denied>" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/properties/features
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Features the Xen hypervisor supports for the guest as defined
> > +		in include/xen/interface/features.h printed as a hex value.
> > +
> > +What:		/sys/hypervisor/properties/pagesize
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Default page size of the hypervisor printed as a hex value.
> > +		Might return "0" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/properties/virtual_start
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Virtual address of the hypervisor as a hex value.
> > +
> > +What:		/sys/hypervisor/type
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		Type of hypervisor:
> > +		"xen": Xen hypervisor
> > +
> > +What:		/sys/hypervisor/uuid
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		UUID of the guest as known to the Xen hypervisor.
> > +
> > +What:		/sys/hypervisor/version/extra
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		The Xen version is in the format <major>.<minor><extra>
> > +		This is the <extra> part of it.
> > +		Might return "<denied>" in case of special security settings
> > +		in the hypervisor.
> > +
> > +What:		/sys/hypervisor/version/major
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		The Xen version is in the format <major>.<minor><extra>
> > +		This is the <major> part of it.
> > +
> > +What:		/sys/hypervisor/version/minor
> > +Date:		March 2009
> > +KernelVersion:	2.6.30
> > +Contact:	xen-devel@...ts.xenproject.org
> > +Description:	If running under Xen:
> > +		The Xen version is in the format <major>.<minor><extra>
> > +		This is the <minor> part of it.
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 09b5ab6a8a5c..68c31aebb79c 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -13982,6 +13982,8 @@ F:	drivers/xen/
> >  F:	arch/x86/include/asm/xen/
> >  F:	include/xen/
> >  F:	include/uapi/xen/
> > +F:	Documentation/ABI/stable/sysfs-hypervisor-xen
> > +F:	Documentation/ABI/testing/sysfs-hypervisor-pmu
> >  
> >  XEN HYPERVISOR ARM
> >  M:	Stefano Stabellini <sstabellini@...nel.org>
>