Features and bug fixes for Linux kernel 3.3

Features and bug fixes for Linux kernel 3.3

[Konrad Rzeszutek Wilk]

Hey,

Linux 3.3 merge window opened last week and today I've asked Linus
to pulled some of the patches. This is what is going in through
the Xen tree:

 - SysFS documentation updates. We are slowly updating them to make sure that the SysFS
   entires are properly documented.
 - Making the grant system able to use more fancier types of grants to speed-up
   guest to guest exchange of data (sub-page and transitive grants).
 - Updates in the backends to be able to export the Xen backends in an
   Hardware Virtualized Management (HVM) guest. We usually export those backends in
   the initial domain (dom0), but are moving slowly to make it possible to do it any guest
   (PV or HVM). NOTE: Only the netback version is in. The blkback needs an
   Ack from Jens Axboe and while I am sure he will provide it it might be past the
   merge window time-frame.
 - Better driver to deal with memory type ioctls calls. In the past we were doing
   ioctls on /proc/xen/priv_cmd (yuck) and with this are moving to doing it in
   /dev/xen/priv_cmd.
 - Fix a security issues were the guest could try to send a nasty (out of band)
   message and potentially cause mishap.
 - Remove duplicate initialization fields in the backend drivers.
 - Jeremy is now working for a fancy new startup so changing the MAINTAINERS file to
   reflect that his contribution are done during his private time.
 - Sensible config options. We had some that weren't all that good so adjusting
   them properly.
 - Bug-fixes, fixing a bug in xen-pciback with the "Ownership but beware" bug.

In the Dave Airlie tree (DRM, graphics) the TTM DMA backend is going in. It allows the TTM
to pre-allocate (and setup DMA for them) the pages for graphics (similar to how network
layers do it) before using them. This means that both radeon and nouveau 32-bit cards
can now work properly with Xen, so that ATI ES1000 found in most server boxes will now
run X. 64-bit cards work just fine.

Full credit is as follow:

Annie Li (7):
      xen/granttable: Introducing grant table V2 stucture
      xen/granttable: Refactor some code
      xen/granttable: Grant tables V2 implementation
      xen/granttable: Keep code format clean
      xen/granttable: Improve comments for function pointers
      xen/granttable: Support sub-page grants
      xen/granttable: Support transitive grants

Bastian Blank (5):
      xen: Add privcmd device driver
      xen: Add xenbus device driver
      xen: Add xenbus_backend device
      xen/privcmd: Remove unused support for arch specific privcmp mmap
      xen/xenbus-frontend: Make error message more clear

Daniel De Graaf (10):
      xen/gntalloc: Change gref_lock to a mutex
      xen/gnt{dev,alloc}: reserve event channels for notify
      xen/event: Add reference counting to event channels
      xen/events: prevent calling evtchn_get on invalid channels
      xen/gntalloc: release grant references on page free
      xen/gntalloc: fix reference counts on multi-page mappings
      xenbus: Support HVM backends
      xenbus: Use grant-table wrapper functions
      xen/grant-table: Support mappings required by blkback
      xen/netback: Enable netback on HVM guests

David Vrabel (2):
      xen: document balloon driver sysfs files
      xen: document backend sysfs files

Ian Campbell (3):
      xen/xenbus: Reject replies with payload > XENSTORE_PAYLOAD_MAX.
      xenbus: maximum buffer size is XENSTORE_PAYLOAD_MAX
      xen/xenbus: don't reimplement kvasprintf via a fixed size buffer

Jan Beulich (1):
      Xen: consolidate and simplify struct xenbus_driver instantiation

Jeremy Fitzhardinge (1):
      Xen: update MAINTAINER info

Julia Lawall (1):
      xen-gntalloc: introduce missing kfree

Konrad Rzeszutek Wilk (7):
      Merge branch 'stable/docs-for-3.3' into stable/for-linus-3.3
      xen/xenbus-frontend: Fix compile error with randconfig
      Merge commit 'v3.2-rc3' into stable/for-linus-3.3
      xen/xenbus: Fix compile error - missing header for xen_initial_domain()
      xen/pciback: Move the PCI_DEV_FLAGS_ASSIGNED ops to the "[un|]bind"
      xen/pciback: Fix "device has been assigned to X domain!" warning
      xen/pciback: Expand the warning message to include domain id.

Maxim Uvarov (1):
      xen: Make XEN_MAX_DOMAIN_MEMORY have more sensible defaults

Tony Luck (1):
      xen/ia64: fix build breakage because of conflicting u64 guest handles

Re: Features and bug fixes for Linux kernel 3.3

[Stefan Kuhne]

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Am 09.01.2012 19:33, schrieb Konrad Rzeszutek Wilk:

Hello,

> Linux 3.3 merge window opened last week and today I've asked Linus
> to pulled some of the patches. This is what is going in through
> the Xen tree:
> 
it sounds like no acpi/cpufreq Support in 3.3.
Is it rigth?

Regards,
Stefan Kuhne


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Re: Features and bug fixes for Linux kernel 3.3

[Konrad Rzeszutek Wilk]

On Mon, Jan 09, 2012 at 07:59:04PM +0100, Stefan Kuhne wrote:
> Am 09.01.2012 19:33, schrieb Konrad Rzeszutek Wilk:
> 
> Hello,
> 
> > Linux 3.3 merge window opened last week and today I've asked Linus
> > to pulled some of the patches. This is what is going in through
> > the Xen tree:
> > 
> it sounds like no acpi/cpufreq Support in 3.3.

Not yet. We started the discussion about the patches and we have an thought
of how to rework them. So it will have to wait :-(

> Is it rigth?

<nods> But the moment they are ready to be posted we will make sure you
are CC-ed on them. There will be undoubtly some bugs we haven't found
and you have this sixth sense in finding them :-)

Thanks!

Re: Features and bug fixes for Linux kernel 3.3

[Konrad Rzeszutek Wilk]

On Mon, Jan 09, 2012 at 01:33:04PM -0500, Konrad Rzeszutek Wilk wrote:
> Hey,
> 
> Linux 3.3 merge window opened last week and today I've asked Linus
> to pulled some of the patches. This is what is going in through
> the Xen tree:
> 
>  - SysFS documentation updates. We are slowly updating them to make sure that the SysFS
>    entires are properly documented.
>  - Making the grant system able to use more fancier types of grants to speed-up
>    guest to guest exchange of data (sub-page and transitive grants).
>  - Updates in the backends to be able to export the Xen backends in an
>    Hardware Virtualized Management (HVM) guest. We usually export those backends in
>    the initial domain (dom0), but are moving slowly to make it possible to do it any guest
>    (PV or HVM). NOTE: Only the netback version is in. The blkback needs an
>    Ack from Jens Axboe and while I am sure he will provide it it might be past the
>    merge window time-frame.
>  - Better driver to deal with memory type ioctls calls. In the past we were doing
>    ioctls on /proc/xen/priv_cmd (yuck) and with this are moving to doing it in
>    /dev/xen/priv_cmd.
>  - Fix a security issues were the guest could try to send a nasty (out of band)
>    message and potentially cause mishap.
>  - Remove duplicate initialization fields in the backend drivers.
>  - Jeremy is now working for a fancy new startup so changing the MAINTAINERS file to
>    reflect that his contribution are done during his private time.
>  - Sensible config options. We had some that weren't all that good so adjusting
>    them properly.
>  - Bug-fixes, fixing a bug in xen-pciback with the "Ownership but beware" bug.

And in the Jens Axboe (block maintainer) we have patches to support the 'secure' DISCARD
operation for blkfront/blkback. It is TRIM/UNMAP with the option of securely erasing the media.