src-test/lib/libvmmapi, branch main

Honor the disabled setting for MSI-X interrupts for passthrough devices.

2020-11-24T23:18:52Z

Add a new ioctl to disable all MSI-X interrupts for a PCI passthrough device and invoke it if a write to the MSI-X capability registers disables MSI-X. This avoids leaving MSI-X interrupts enabled on the host if a guest device driver has disabled them (e.g. as part of detaching a guest device driver). This was found by Chelsio QA when testing that a Linux guest could switch from MSI-X to MSI interrupts when using the cxgb4vf driver. While here, explicitly fail requests to enable MSI on a passthrough device if MSI-X is enabled and vice versa. Reported by: Sony Arpita Das @ Chelsio Reviewed by: grehan, markj MFC after: 2 weeks Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D27212

vmm(4), bhyve(8): Expose kernel-emulated special devices to userspace

2020-05-15T15:54:22Z

Expose the special kernel LAPIC, IOAPIC, and HPET devices to userspace for use in, e.g., fallback instruction emulation (when userspace has a newer instruction decode/emulation layer than the kernel vmm(4)). Plumb the ioctl through libvmmapi and register the memory ranges in bhyve(8). Reviewed by: grehan Differential Revision: https://reviews.freebsd.org/D24525

Initial support for bhyve save and restore.

2020-05-05T00:02:04Z

Save and restore (also known as suspend and resume) permits a snapshot to be taken of a guest's state that can later be resumed. In the current implementation, bhyve(8) creates a UNIX domain socket that is used by bhyvectl(8) to send a request to save a snapshot (and optionally exit after the snapshot has been taken). A snapshot currently consists of two files: the first holds a copy of guest RAM, and the second file holds other guest state such as vCPU register values and device model state. To resume a guest, bhyve(8) must be started with a matching pair of command line arguments to instantiate the same set of device models as well as a pointer to the saved snapshot. While the current implementation is useful for several uses cases, it has a few limitations. The file format for saving the guest state is tied to the ABI of internal bhyve structures and is not self-describing (in that it does not communicate the set of device models present in the system). In addition, the state saved for some device models closely matches the internal data structures which might prove a challenge for compatibility of snapshot files across a range of bhyve versions. The file format also does not currently support versioning of individual chunks of state. As a result, the current file format is not a fixed binary format and future revisions to save and restore will break binary compatiblity of snapshot files. The goal is to move to a more flexible format that adds versioning, etc. and at that point to commit to providing a reasonable level of compatibility. As a result, the current implementation is not enabled by default. It can be enabled via the WITH_BHYVE_SNAPSHOT=yes option for userland builds, and the kernel option BHYVE_SHAPSHOT. Submitted by: Mihai Tiganus, Flavius Anton, Darius Mihai Submitted by: Elena Mihailescu, Mihai Carabas, Sergiu Weisz Relnotes: yes Sponsored by: University Politehnica of Bucharest Sponsored by: Matthew Grooms (student scholarships) Sponsored by: iXsystems Differential Revision: https://reviews.freebsd.org/D19495

Map negative types passed to vm_capability_type2name to NULL.

2020-04-21T21:48:35Z

Submitted by: vangyzen

Add description string for VM_CAP_BPT_EXIT.

2020-04-21T17:30:56Z

While here, replace the array of mapping structures with an array of string pointers where the index is the capability value. Submitted by: Rob Fairbanks Reviewed by: rgrimes MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D24289

Forgotten to remove the previous if statement in commit r355838.

2019-12-17T01:37:02Z

MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D19400

Attempt to load vmm(4) module before creating a guest using vm_create()

2019-12-17T01:33:26Z

wrapper in libvmmapi. Submitted by: Rob Fairbanks Reviewed by: jhb MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D19400

Update Makefile.depend files

2019-12-11T17:37:53Z

Update a bunch of Makefile.depend files as a result of adding Makefile.depend.options files Reviewed by: bdrewery MFC after: 1 week Sponsored by: Juniper Networks Differential Revision: https://reviews.freebsd.org/D22494

bhyve: Use MAP_GUARD when mapping guest memory ranges.

2018-09-06T20:29:40Z

Instead of relying on PROT_NONE mappings with MAP_ANON, use MAP_GUARD to reserve address space around guest memory ranges including the guard ranges of address space around mappings. Submitted by: Shawn Webb Reviewed by: araujo Approved by: re (rgrimes) MFC after: 1 month Sponsored by: HardendBSD and G2, Inc Differential Revision: https://reviews.freebsd.org/D16822

Fix style(9) space vs tab.

2018-06-14T01:28:55Z

Reviewed by: jhb MFC after: 3 weeks. Sponsored by: iXsystems Inc. Differential Revision: https://reviews.freebsd.org/D15774