src/sys/dev/hyperv, branch release/12.3.0

pvclock: Add vDSO support

2021-10-12T16:01:26Z

Add vDSO support for timekeeping devices that support the KVM/XEN paravirtual clock API. Also, expose, in the userspace-accessible '', definitions that will be needed by 'libc' to support 'VDSO_TH_ALGO_X86_PVCLK'. Sponsored by: Juniper Networks, Inc. Sponsored by: Klara, Inc. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D31418 (cherry picked from commit d4b2d3035a23d5dc468d41151487a8299bf45cdc)

netvsc: Fix a typo in a comment

2021-10-06T06:22:12Z

- s/prefered/preferred/ (cherry picked from commit 9ebd651b58502f0572a7832d088f53f7a2ad00a5)

storvsc: fix auto-sense reporting

2021-05-21T13:49:54Z

I saw a situation where the driver set CAM_AUTOSNS_VALID on a failed ccb even though SRB_STATUS_AUTOSENSE_VALID was not set in the status. The actual sense data remained all zeros. The problem seems to be that create_storvsc_request() always sets hv_storvsc_request::sense_info_len, so checking for sense_info_len != 0 is not enough to determine if any auto-sense data is actually available. Sponsored by: CyberSecure (cherry picked from commit 8afecefd57c5ac95200f43227cd00f265154acee)

Hyper-V: hn: Initialize the internal field of per packet info on tx path

2021-03-29T09:12:56Z

The RSC support feature introduced a bit field "rm_internal" in struct rndis_pktinfo with total size unchanged. The guest does not use this field in the tx path. However we need to initialize it to zero in case older hosts which are not aware of this field. Fixes: a491581f ("Hyper-V: hn: Enable vSwitch RSC support") MFC after: 2 weeks Sponsored by: Microsoft (cherry picked from commit 805dbff6c36a6cd84491aa53a02315fa025734cc)

Hyper-V: hn: Enable vSwitch RSC support in hn netvsc driver

2021-03-29T08:55:18Z

Receive Segment Coalescing (RSC) in the vSwitch is a feature available in Windows Server 2019 hosts and later. It reduces the per packet processing overhead by coalescing multiple TCP segments when possible. This happens mostly when TCP traffics are among different guests on same host. This patch adds netvsc driver support for this feature. The patch also updates NVS version to 6.1 as needed for RSC enablement. MFC after: 2 weeks Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D29075 (cherry picked from commit a491581f3f8df07cdff0236bd556895205929af4)

Hyper-V: hn: Store host hash value in flowid

2021-03-29T08:32:39Z

When rx packet contains hash value sent from host, store it in the mbuf's flowid field so when the same mbuf is on the tx path, the hash value can be used by the host to determine the outgoing network queue. MFC after: 2 weeks Sponsored by: Microsoft (cherry picked from commit 80f39bd95f22322152709ea5fae3a3c546044c9c)

Hyper-V: hn: Relinquish cpu in HN_LOCK to avoid deadlock

2021-03-15T05:15:21Z

The try lock loop in HN_LOCK put the thread spinning on cpu if the lock is not available. It is possible to cause deadlock if the thread holding the lock is sleeping. Relinquish the cpu to work around this problem even it doesn't completely solve the issue. The priority inversion could cause the livelock no matter how less likely it could happen. A more complete solution may be needed in the future. Reported by: Microsoft, Netapp MFC after: 2 weeks Sponsored by: Microsoft (cherry picked from commit b3460f44524b145c6c8a760ebe65052560a810bf)

Hyper-V: pcib: Check revoke status during device attach

2021-03-15T05:11:50Z

It is possible that the vmbus pcib channel is revoked during attach path. The attach path could be waiting for response from host and this response will never arrive since the channel has already been revoked from host point of view. Check this situation during wait complete and return failed if this happens. Reported by: Netapp MFC after: 2 weeks Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D26486 (cherry picked from commit 75c2786c25fef9a6f8239c9fc1631cd17756579b)

Hyper-V: storvsc: Enhance srb_status code handling.

2021-03-15T05:08:43Z

In hv_storvsc_io_request() when coring, prevent changing of the send channel from the base channel to another one. storvsc_poll always probes on the base channel. Based upon conversations with Microsoft, changed the handling of srb_status codes. Most we should never get, others yes. All are treated as retry-able except for two. We should not get these statuses, but if we ever do, the I/O state is not known. Submitted by: Alexander Sideropoulos Reviewed by: trasz, allanjude, whu MFC after: 1 week Sponsored by: Netapp Inc Differential Revision: https://reviews.freebsd.org/D25756 (cherry picked from commit 2a0ce39d086ffe13782c9dc1e24bb240abbe790a)

hyperv/vmbus: Fix the wrong size in ndis_offload structure

2021-03-15T05:03:58Z

Submitted by: whu MFC after: 2 weeks Sponsored by: Microsoft (cherry picked from commit 23a499203c5b3fd74f781d1383269a6e168588cf)