wireguard-linux/drivers/hv/hv_util.c, branch jd/orphan-parallel

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2020-10-14T17:32:10Z

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

Driver: hv: util: Use VMBUS_RING_SIZE() for ringbuffer sizes

2020-09-28T08:57:28Z

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

hv_utils: drain the timesync packets on onchannelcallback

2020-08-24T14:49:04Z

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

hv_utils: return error if host timesysnc update is stale

2020-08-24T14:48:37Z

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

Merge tag 'hyperv-next-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2020-02-03T14:42:03Z

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

hv_utils: Add the support of hibernation

2020-01-27T03:10:17Z

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

hv_utils: Support host-initiated hibernation request

2020-01-27T03:10:16Z

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

hv_utils: Support host-initiated restart request

2020-01-27T03:10:16Z

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

clocksource/drivers/hyper-v: Untangle stimers and timesync from clocksources

2020-01-16T18:09:02Z

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

Drivers: hv: util: Specify ring buffer size using Hyper-V page size

2019-11-22T01:10:45Z

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