linux-stable.git/arch/x86/kernel/cpu/mshyperv.c, branch linux-3.4.y

x86, hyperv: Mark the Hyper-V clocksource as being continuous

2015-04-14T09:33:55+00:00

commit 32c6590d126836a062b3140ed52d898507987017 upstream.

The Hyper-V clocksource is continuous; mark it accordingly.

Signed-off-by: K. Y. Srinivasan 
Acked-by: jasowang@redhat.com
Cc: gregkh@linuxfoundation.org
Cc: devel@linuxdriverproject.org
Cc: olaf@aepfle.de
Cc: apw@canonical.com
Link: http://lkml.kernel.org/r/1421108762-3331-1-git-send-email-kys@microsoft.com
Signed-off-by: Thomas Gleixner 
Signed-off-by: Zefan Li

x86: Hyper-V: register clocksource only if its advertised

2013-02-28T14:58:59+00:00

commit 32068f6527b8f1822a30671dedaf59c567325026 upstream.

Enable hyperv_clocksource only if its advertised as a feature.
XenServer 6 returns the signature which is checked in
ms_hyperv_platform(), but it does not offer all features. Currently the
clocksource is enabled unconditionally in ms_hyperv_init_platform(), and
the result is a hanging guest.

Hyper-V spec Bit 1 indicates the availability of Partition Reference
Counter.  Register the clocksource only if this bit is set.

The guest in question prints this in dmesg:
 [    0.000000] Hypervisor detected: Microsoft HyperV
 [    0.000000] HyperV: features 0x70, hints 0x0

This bug can be reproduced easily be setting 'viridian=1' in a HVM domU
.cfg file. A workaround without this patch is to boot the HVM guest with
'clocksource=jiffies'.

Signed-off-by: Olaf Hering 
Link: http://lkml.kernel.org/r/1359940959-32168-1-git-send-email-kys@microsoft.com
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: H. Peter Anvin 
Signed-off-by: Greg Kroah-Hartman

x86: Hyper-V: Integrate the clocksource with Hyper-V detection code

2011-09-08T08:33:59+00:00

The Hyper-V clocksource driver is best integrated with Hyper-V
detection code since: 

  (a) Linux guests running on Hyper-V require it

  (b) Integration into that code significanly reduces code size

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Haiyang Zhang 
Cc: gregkh@suse.de
Cc: devel@linuxdriverproject.org
Cc: virtualization@lists.osdl.org
Link: http://lkml.kernel.org/r/1315434310-4827-1-git-send-email-kys@microsoft.com
Signed-off-by: Thomas Gleixner

x86: Export the symbol ms_hyperv

2010-07-08T21:12:03+00:00

This is needed so that the staging hyperv can properly access this
symbol.

Signed-off-by: K. Y. Srinivasan 
Acked-by: H. Peter Anvin 
Signed-off-by: Greg Kroah-Hartman

x86, hypervisor: add missing

2010-05-10T05:46:54+00:00

EXPORT_SYMBOL() needs  to be included; fixes modular
builds of the VMware balloon driver, and any future modular drivers
which depends on the hypervisor.

Reported-by: Ingo Molnar 
Signed-off-by: H. Peter Anvin 
Cc: Greg KH 
Cc: Hank Janssen 
Cc: Alok Kataria 
Cc: Ky Srinivasan 
Cc: Dmitry Torokhov 
LKML-Reference: <4BE49778.6060800@zytor.com>

x86, hypervisor: Export the x86_hyper* symbols

2010-05-09T08:10:34+00:00

Export x86_hyper and the related specific structures, allowing for
hypervisor identification by modules.

Signed-off-by: H. Peter Anvin 
Cc: Greg KH 
Cc: Hank Janssen 
Cc: Alok Kataria 
Cc: Ky Srinivasan 
Cc: Dmitry Torokhov 
LKML-Reference: <4BE49778.6060800@zytor.com>

x86: Clean up the hypervisor layer

2010-05-08T00:13:04+00:00

Clean up the hypervisor layer and the hypervisor drivers, using an ops
structure instead of an enumeration with if statements.

The identity of the hypervisor, if needed, can be tested by testing
the pointer value in x86_hyper.

The MS-HyperV private state is moved into a normal global variable
(it's per-system state, not per-CPU state).  Being a normal bss
variable, it will be left at all zero on non-HyperV platforms, and so
can generally be tested for HyperV-specific features without
additional qualification.

Signed-off-by: H. Peter Anvin 
Acked-by: Greg KH 
Cc: Hank Janssen 
Cc: Alok Kataria 
Cc: Ky Srinivasan 
LKML-Reference: <4BE49778.6060800@zytor.com>

x86, HyperV: fix up the license to mshyperv.c

2010-05-08T00:00:25+00:00

This should have been GPLv2 only, we cut and pasted from the wrong file
originally, sorry.

Also removed some unneeded boilerplate license code, we all know where
to find the GPLv2, and that there's no warranty as that is implicit from
the license.

Cc: Ky Srinivasan 
Cc: Hank Janssen 
Signed-off-by: Greg Kroah-Hartman 
LKML-Reference: <20100507235541.GA15448@kroah.com>
Signed-off-by: H. Peter Anvin

x86: Detect running on a Microsoft HyperV system

2010-05-07T01:24:15+00:00

This patch integrates HyperV detection within the framework currently
used by VmWare. With this patch, we can avoid having to replicate the
HyperV detection code in each of the Microsoft HyperV drivers.

Reworked and tweaked by Greg K-H to build properly.

Signed-off-by: K. Y. Srinivasan 
LKML-Reference: <20100506190841.GA1605@kroah.com>
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: Vadim Rozenfeld 
Cc: Avi Kivity 
Cc: Gleb Natapov 
Cc: Frederic Weisbecker 
Cc: Alexey Dobriyan 
Cc: "K.Prasad" 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Paul Mackerras 
Cc: Alan Cox 
Cc: Haiyang Zhang 
Cc: Hank Janssen 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: H. Peter Anvin