15 Oct, 2020
1 commit
-
Pull Hyper-V updates from Wei Liu:
- a series from Boqun Feng to support page size larger than 4K
- a few miscellaneous clean-ups
* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
hv: clocksource: Add notrace attribute to read_hv_sched_clock_*() functions
x86/hyperv: Remove aliases with X64 in their name
PCI: hv: Document missing hv_pci_protocol_negotiation() parameter
scsi: storvsc: Support PAGE_SIZE larger than 4K
Driver: hv: util: Use VMBUS_RING_SIZE() for ringbuffer sizes
HID: hyperv: Use VMBUS_RING_SIZE() for ringbuffer sizes
Input: hyperv-keyboard: Use VMBUS_RING_SIZE() for ringbuffer sizes
hv_netvsc: Use HV_HYP_PAGE_SIZE for Hyper-V communication
hv: hyperv.h: Introduce some hvpfn helper functions
Drivers: hv: vmbus: Move virt_to_hvpfn() to hyperv header
Drivers: hv: Use HV_HYP_PAGE in hv_synic_enable_regs()
Drivers: hv: vmbus: Introduce types of GPADL
Drivers: hv: vmbus: Move __vmbus_open()
Drivers: hv: vmbus: Always use HV_HYP_PAGE_SIZE for gpadl
drivers: hv: remove cast from hyperv_die_event
28 Sep, 2020
1 commit
-
For a Hyper-V vmbus, the size of the ringbuffer has two requirements:
1) it has to take one PAGE_SIZE for the header
2) it has to be PAGE_SIZE aligned so that double-mapping can work
VMBUS_RING_SIZE() could calculate a correct ringbuffer size which
fulfills both requirements, therefore use it to make sure vmbus work
when PAGE_SIZE != HV_HYP_PAGE_SIZE (4K).Note that since the argument for VMBUS_RING_SIZE() is the size of
payload (data part), so it will be minus 4k (the size of header when
PAGE_SIZE = 4k) than the original value to keep the ringbuffer total
size unchanged when PAGE_SIZE = 4k.Signed-off-by: Boqun Feng
Cc: Michael Kelley
Reviewed-by: Michael Kelley
Link: https://lore.kernel.org/r/20200916034817.30282-11-boqun.feng@gmail.com
Signed-off-by: Wei Liu
24 Aug, 2020
2 commits
-
There could be instances where a system stall prevents the timesync
packets to be consumed. And this might lead to more than one packet
pending in the ring buffer. Current code empties one packet per callback
and it might be a stale one. So drain all the packets from ring buffer
on each callback.Signed-off-by: Vineeth Pillai
Reviewed-by: Michael Kelley
Link: https://lore.kernel.org/r/20200821152849.99517-1-viremana@linux.microsoft.com
Signed-off-by: Wei Liu -
If for any reason, host timesync messages were not processed by
the guest, hv_ptp_gettime() returns a stale value and the
caller (clock_gettime, PTP ioctl etc) has no means to know this
now. Return an error so that the caller knows about this.Signed-off-by: Vineeth Pillai
Reviewed-by: Michael Kelley
Link: https://lore.kernel.org/r/20200821152523.99364-1-viremana@linux.microsoft.com
Signed-off-by: Wei Liu
03 Feb, 2020
1 commit
-
Pull Hyper-V updates from Sasha Levin:
- Most of the commits here are work to enable host-initiated
hibernation support by Dexuan Cui.- Fix for a warning shown when host sends non-aligned balloon requests
by Tianyu Lan.* tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
hv_utils: Add the support of hibernation
hv_utils: Support host-initiated hibernation request
hv_utils: Support host-initiated restart request
Tools: hv: Reopen the devices if read() or write() returns errors
video: hyperv: hyperv_fb: Use physical memory for fb on HyperV Gen 1 VMs.
Drivers: hv: vmbus: Ignore CHANNELMSG_TL_CONNECT_RESULT(23)
video: hyperv_fb: Fix hibernation for the deferred IO feature
Input: hyperv-keyboard: Add the support of hibernation
hv_balloon: Balloon up according to request page number
27 Jan, 2020
3 commits
-
Add util_pre_suspend() and util_pre_resume() for some hv_utils devices
(e.g. kvp/vss/fcopy), because they need special handling before
util_suspend() calls vmbus_close().For kvp, all the possible pending work items should be cancelled.
For vss and fcopy, some extra clean-up needs to be done, i.e. fake a
THAW message for hv_vss_daemon and fake a CANCEL_FCOPY message for
hv_fcopy_daemon, otherwise when the VM resums back, the daemons
can end up in an inconsistent state (i.e. the file systems are
frozen but will never be thawed; the file transmitted via fcopy
may not be complete). Note: there is an extra patch for the daemons:
"Tools: hv: Reopen the devices if read() or write() returns errors",
because the hv_utils driver can not guarantee the whole transaction
finishes completely once util_suspend() starts to run (at this time,
all the userspace processes are frozen).util_probe() disables channel->callback_event to avoid the race with
the channel callback.Signed-off-by: Dexuan Cui
Reviewed-by: Michael Kelley
Signed-off-by: Sasha Levin -
Update the Shutdown IC version to 3.2, which is required for the host to
send the hibernation request.The user is expected to create the below udev rule file, which is applied
upon the host-initiated hibernation request:root@localhost:~# cat /usr/lib/udev/rules.d/40-vm-hibernation.rules
SUBSYSTEM=="vmbus", ACTION=="change", DRIVER=="hv_utils", ENV{EVENT}=="hibernate", RUN+="/usr/bin/systemctl hibernate"Signed-off-by: Dexuan Cui
Reviewed-by: Michael Kelley
Signed-off-by: Sasha Levin -
The hv_utils driver currently supports a "shutdown" operation initiated
from the Hyper-V host. Newer versions of Hyper-V also support a "restart"
operation. So add support for the updated protocol version that has
"restart" support, and perform a clean reboot when such a message is
received from Hyper-V.To test the restart functionality, run this PowerShell command on the
Hyper-V host:Restart-VM -Type Reboot
Signed-off-by: Dexuan Cui
Reviewed-by: Michael Kelley
Signed-off-by: Sasha Levin
17 Jan, 2020
1 commit
-
hyperv_timer.c exports hyperv_cs, which is used by stimers and the
timesync mechanism. However, the clocksource dependency is not
needed: these mechanisms only depend on the partition reference
counter (which can be read via a MSR or via the TSC Reference Page).Introduce the (function) pointer hv_read_reference_counter, as an
embodiment of the partition reference counter read, and export it
in place of the hyperv_cs pointer. The latter can be removed.This should clarify that there's no relationship between Hyper-V
stimers & timesync and the Linux clocksource abstractions. No
functional or semantic change.Suggested-by: Michael Kelley
Signed-off-by: Andrea Parri
Reviewed-by: Michael Kelley
Signed-off-by: Daniel Lezcano
Link: https://lore.kernel.org/r/20200109160650.16150-2-parri.andrea@gmail.com
22 Nov, 2019
2 commits
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VMbus ring buffers are sized based on the 4K page size used by
Hyper-V. The Linux guest page size may not be 4K on all architectures
so use the Hyper-V page size to specify the ring buffer size.Signed-off-by: Himadri Pandya
Reviewed-by: Michael Kelley
Signed-off-by: Sasha Levin -
The recv_buffer is used to retrieve data from the VMbus ring buffer.
VMbus ring buffers are sized based on the guest page size which
Hyper-V assumes to be 4KB. But it may be different on some
architectures. So use the Hyper-V page size to allocate the
recv_buffer and set the maximum size to receive.Signed-off-by: Himadri Pandya
Reviewed-by: Michael Kelley
Signed-off-by: Sasha Levin
03 Jul, 2019
1 commit
-
Continue consolidating Hyper-V clock and timer code into an ISA
independent Hyper-V clocksource driver.Move the existing clocksource code under drivers/hv and arch/x86 to the new
clocksource driver while separating out the ISA dependencies. Update
Hyper-V initialization to call initialization and cleanup routines since
the Hyper-V synthetic clock is not independently enumerated in ACPI.Update Hyper-V clocksource users in KVM and VDSO to get definitions from
the new include file.No behavior is changed and no new functionality is added.
Suggested-by: Marc Zyngier
Signed-off-by: Michael Kelley
Signed-off-by: Thomas Gleixner
Reviewed-by: Vitaly Kuznetsov
Cc: "bp@alien8.de"
Cc: "will.deacon@arm.com"
Cc: "catalin.marinas@arm.com"
Cc: "mark.rutland@arm.com"
Cc: "linux-arm-kernel@lists.infradead.org"
Cc: "gregkh@linuxfoundation.org"
Cc: "linux-hyperv@vger.kernel.org"
Cc: "olaf@aepfle.de"
Cc: "apw@canonical.com"
Cc: "jasowang@redhat.com"
Cc: "marcelo.cerri@canonical.com"
Cc: Sunil Muthuswamy
Cc: KY Srinivasan
Cc: "sashal@kernel.org"
Cc: "vincenzo.frascino@arm.com"
Cc: "linux-arch@vger.kernel.org"
Cc: "linux-mips@vger.kernel.org"
Cc: "linux-kselftest@vger.kernel.org"
Cc: "arnd@arndb.de"
Cc: "linux@armlinux.org.uk"
Cc: "ralf@linux-mips.org"
Cc: "paul.burton@mips.com"
Cc: "daniel.lezcano@linaro.org"
Cc: "salyzyn@android.com"
Cc: "pcc@google.com"
Cc: "shuah@kernel.org"
Cc: "0x7f454c46@gmail.com"
Cc: "linux@rasmusvillemoes.dk"
Cc: "huw@codeweavers.com"
Cc: "sfr@canb.auug.org.au"
Cc: "pbonzini@redhat.com"
Cc: "rkrcmar@redhat.com"
Cc: "kvm@vger.kernel.org"
Link: https://lkml.kernel.org/r/1561955054-1838-3-git-send-email-mikelley@microsoft.com
05 Jun, 2019
1 commit
-
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usaextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 33 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Reviewed-by: Kate Stewart
Reviewed-by: Alexios Zavras
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000435.254582722@linutronix.de
Signed-off-by: Greg Kroah-Hartman
12 Nov, 2018
1 commit
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The correct module name is hv_utils. This patch corrects
the name in struct hv_driver util_drv.Signed-off-by: Haiyang Zhang
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
03 Jul, 2018
1 commit
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Recent kernels support asynchronous probing; most hyperv drivers
can be probed async easily so set the required flag for this.Signed-off-by: Arjan van de Ven
Signed-off-by: Stephen Hemminger
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
25 May, 2017
2 commits
-
It was found that ICTIMESYNCFLAG_SYNC packets are handled incorrectly
on WS2012R2, e.g. after the guest is paused and resumed its time is set
to something different from host's time. The problem is that we call
adj_guesttime() with reftime=0 for these old hosts and we don't account
for that in 'if (adj_flags & ICTIMESYNCFLAG_SYNC)' branch and
hv_set_host_time().While we could've solved this by adding a check like
'if (ts_srv_version > TS_VERSION_3)' to hv_set_host_time() I prefer
to do some refactoring. We don't need to have two separate containers
for host samples, struct host_ts which we use for PTP is enough.Throw away 'struct adj_time_work' and create hv_get_adj_host_time()
accessor to host_ts to avoid code duplication.Fixes: 3716a49a81ba ("hv_utils: implement Hyper-V PTP source")
Signed-off-by: Vitaly Kuznetsov
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
Turns out that our implementation of .getcrosststamp() never actually
worked. Hyper-V is sending time samples every 5 seconds and this is
too much for get_device_system_crosststamp() as it's interpolation
algorithm (which nobody is currently using in kernel, btw) accounts
for a 'slow' device but we're not slow in Hyper-V, our time reference
is too far away..getcrosststamp() is not currently used, get_device_system_crosststamp()
almost always returns -EINVAL and client falls back to using PTP_SYS_OFFSET
so this patch doesn't change much. I also tried doing interpolation
manually (e.g. the same way hv_ptp_gettime() works and it turns out that
we're getting even lower quality:PTP_SYS_OFFSET_PRECISE with manual interpolation:
* PHC0 0 3 37 4 -3974ns[-5338ns] +/- 977ns
* PHC0 0 3 77 7 +2227ns[+3184ns] +/- 576ns
* PHC0 0 3 177 10 +3060ns[+5220ns] +/- 548ns
* PHC0 0 3 377 12 +3937ns[+4371ns] +/- 1414ns
* PHC0 0 3 377 6 +764ns[+1240ns] +/- 1047ns
* PHC0 0 3 377 7 -1210ns[-3731ns] +/- 479ns
* PHC0 0 3 377 9 +153ns[-1019ns] +/- 406ns
* PHC0 0 3 377 12 -872ns[-1793ns] +/- 443ns
* PHC0 0 3 377 5 +701ns[+3599ns] +/- 426ns
* PHC0 0 3 377 5 -923ns[ -375ns] +/- 1062nsPTP_SYS_OFFSET:
* PHC0 0 3 7 5 +72ns[+8020ns] +/- 251ns
* PHC0 0 3 17 5 -885ns[-3661ns] +/- 254ns
* PHC0 0 3 37 6 -454ns[-5732ns] +/- 258ns
* PHC0 0 3 77 10 +1183ns[+3754ns] +/- 164ns
* PHC0 0 3 377 5 +579ns[+1137ns] +/- 110ns
* PHC0 0 3 377 7 +501ns[+1064ns] +/- 96ns
* PHC0 0 3 377 9 +1641ns[+3342ns] +/- 106ns
* PHC0 0 3 377 8 -47ns[ +77ns] +/- 160ns
* PHC0 0 3 377 5 +54ns[ +107ns] +/- 102ns
* PHC0 0 3 377 8 -354ns[ -617ns] +/- 89nsThis fact wasn't noticed during the initial testing of the PTP device
somehow but got revealed now. Let's just drop .getcrosststamp()
implementation for now as it doesn't seem to be suitable for us.Signed-off-by: Vitaly Kuznetsov
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
16 Mar, 2017
1 commit
-
Without the patch, I always get a "BUG: spinlock bad magic" warning.
Fixes: 3716a49a81ba ("hv_utils: implement Hyper-V PTP source")
Signed-off-by: Dexuan Cui
Cc: Vitaly Kuznetsov
Cc: "K. Y. Srinivasan"
Cc: Haiyang Zhang
Cc: Stephen Hemminger
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
15 Feb, 2017
1 commit
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Change the simple boolean batched_reading into a tri-value.
For future NAPI support in netvsc driver, the callback needs to
occur directly in interrupt handler.Batched mode is also changed to disable host interrupts immediately
in interrupt routine (to avoid unnecessary host signals), and the
tasklet is rescheduled if more data is detected.Signed-off-by: Stephen Hemminger
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
10 Feb, 2017
2 commits
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Fix a typo.
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
With TimeSync version 4 protocol support we started updating system time
continuously through the whole lifetime of Hyper-V guests. Every 5 seconds
there is a time sample from the host which triggers do_settimeofday[64]().
While the time from the host is very accurate such adjustments may cause
issues:
- Time is jumping forward and backward, some applications may misbehave.
- In case an NTP server runs in parallel and uses something else for time
sync (network, PTP,...) system time will never converge.
- Systemd starts annoying you by printing "Time has been changed" every 5
seconds to the system log.Instead of doing in-kernel time adjustments offload the work to an
NTP client by exposing TimeSync messages as a PTP device. Users may now
decide what they want to use as a source.I tested the solution with chrony, the config was:
refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0
The result I'm seeing is accurate enough, the time delta between the guest
and the host is almost always within [-10us, +10us], the in-kernel solution
was giving us comparable results.I also tried implementing PPS device instead of PTP by using not currently
used Hyper-V synthetic timers (we use only one of four for clockevent) but
with PPS source only chrony wasn't able to give me the required accuracy,
the delta often more that 100us.Signed-off-by: Vitaly Kuznetsov
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
31 Jan, 2017
3 commits
-
Log the negotiated IC versions.
Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
Previously, we were assuming that each IC protocol version was tied to a
specific host version. For example, some Windows 10 preview hosts only
support v3 TimeSync even though driver assumes v4 is supported by all
Windows 10 hosts.The guest will stop trying to negotiate even though older supported
versions may still be offered by the host.Make IC version negotiation more robust by going through all versions
that are supported by the guest.Fixes: 3da0401b4d0e ("Drivers: hv: utils: Fix the mapping between host
version and protocol to use")Reported-by: Rolf Neugebauer
Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
do_settimeofday() is deprecated, use do_settimeofday64() instead.
Signed-off-by: Vitaly Kuznetsov
Acked-by: John Stultz
Acked-by: Thomas Gleixner
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
20 Jan, 2017
1 commit
-
As part of the effort to interact with Hyper-V in an instruction set
architecture independent way, use the new API to get the current
tick.Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
07 Nov, 2016
1 commit
-
We should intentionally declare the protocols to use for every known host
and default to using the latest protocol if the host is unknown or new.Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
25 Oct, 2016
1 commit
-
The host keeps sending heartbeat packets independent of the
guest responding to them. Even though we respond to the heartbeat messages at
interrupt level, we can have situations where there maybe multiple heartbeat
messages pending that have not been responded to. For instance this occurs when the
VM is paused and the host continues to send the heartbeat messages.
Address this issue by draining and responding to all
the heartbeat messages that maybe pending.Signed-off-by: Long Li
Signed-off-by: K. Y. Srinivasan
CC: Stable
Signed-off-by: Greg Kroah-Hartman
09 Sep, 2016
1 commit
-
Under stress, we have seen allocation failure in time synch code. Avoid
this dynamic allocation.Signed-off-by: Vivek Yadav
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
08 Sep, 2016
3 commits
-
This enables support for more accurate TimeSync v4 samples when hosted
under Windows Server 2016 and newer hosts.The new time samples include a "vmreferencetime" field that represents
the guest's TSC value when the host generated its time sample. This value
lets the guest calculate the latency in receiving the time sample. The
latency is added to the sample host time prior to updating the clock.Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
Only the first 50 samples after boot were being used to discipline the
clock. After the first 50 samples, any samples from the host were ignored
and the guest clock would eventually drift from the host clock.This patch allows TimeSync-enabled guests to continuously synchronize the
clock with the host clock, even after the first 50 samples.Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
Different Windows host versions may reuse the same protocol version when
negotiating the TimeSync, Shutdown, and Heartbeat protocols. We should only
refer to the protocol version to avoid conflating the two concepts.Signed-off-by: Alex Ng
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
02 Mar, 2016
1 commit
-
Pass the channel information to the util drivers that need to defer
reading the channel while they are processing a request. This would address
the following issue reported by Vitaly:Commit 3cace4a61610 ("Drivers: hv: utils: run polling callback always in
interrupt context") removed direct *_transaction.state = HVUTIL_READY
assignments from *_handle_handshake() functions introducing the following
race: if a userspace daemon connects before we get first non-negotiation
request from the server hv_poll_channel() won't set transaction state to
HVUTIL_READY as (!channel) condition will fail, we set it to non-NULL on
the first real request from the server.Signed-off-by: K. Y. Srinivasan
Reported-by: Vitaly Kuznetsov
Signed-off-by: Greg Kroah-Hartman
02 Mar, 2015
2 commits
-
When the offer is rescinded, vmbus_close() can free up the channel;
deinitialize the service before closing the channel.Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman -
Before the line vmbus_open() returns, srv->util_cb can be already running
and the variables, like util_fw_version, are needed by the srv->util_cb.So we have to make sure the variables are initialized before the vmbus_open().
CC: "K. Y. Srinivasan"
Reviewed-by: Vitaly Kuznetsov
Reviewed-by: Jason Wang
Signed-off-by: Dexuan Cui
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
10 Jul, 2014
1 commit
-
Add code to poll the channel since we process only one message
at a time and the host may not interrupt us. Also increase the
receive buffer size since some KVP messages are close to 8K bytes in size.Signed-off-by: K. Y. Srinivasan
Cc:
Signed-off-by: Greg Kroah-Hartman
19 Feb, 2014
1 commit
-
Implement the file copy service for Linux guests on Hyper-V. This permits the
host to copy a file (over VMBUS) into the guest. This facility is part of
"guest integration services" supported on the Windows platform.
Here is a link that provides additional details on this functionality:http://technet.microsoft.com/en-us/library/dn464282.aspx
In V1 version of the patch I have addressed comments from
Olaf Hering and Dan CarpenterIn V2 version of this patch I did some minor cleanup (making some globals
static). In V4 version of the patch I have addressed all of Olaf's
most recent set of comments/concerns.In V5 version of the patch I had addressed Greg's most recent comments.
I would like to thank Greg for suggesting that I use misc device; it has
significantly simplified the code.In V6 version of the patch I have cleaned up error message based on Olaf's
comments. I have also rebased the patch based on the current tip.In this version of the patch, I have addressed the latest comments from Greg.
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
30 Sep, 2013
1 commit
-
We need/want the mei fixes in here so we can apply other updates that
are depending on them.Signed-off-by: Greg Kroah-Hartman
27 Sep, 2013
1 commit
-
The current code does not correctly negotiate the version numbers for the util
driver when hosted on earlier hosts. The version numbers presented by this
driver were not compatible with the version numbers supported by Windows Server
2008. Fix this problem.I would like to thank Olaf Hering (ohering@suse.com) for identifying the problem.
Reported-by: Olaf Hering
Signed-off-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
26 Sep, 2013
1 commit
-
The variable execute_shutdown is only assigned the values true and
false. Change its type to bool.The simplified semantic patch that find this problem is as
follows (http://coccinelle.lip6.fr/):@exists@
type T;
identifier b;
@@
- T
+ bool
b = ...;
... when any
b = \(true\|false\)Signed-off-by: Peter Senna Tschudin
Signed-off-by: Greg Kroah-Hartman
02 Aug, 2013
1 commit
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Remove HV_DRV_VERSION, it has no meaning for upstream drivers.
Initially it was supposed to show the "Linux Integration Services"
version, now it is not in sync anymore with the out-of-tree drivers
available from the MSFT website.The only place where a version string is still required is the KVP
command "IntegrationServicesVersion" which is handled by
tools/hv/hv_kvp_daemon.c. To satisfy such KVP request from the host pass
the current string to the daemon during KVP userland registration.Signed-off-by: Olaf Hering
Acked-by: K. Y. Srinivasan
Signed-off-by: Greg Kroah-Hartman
