Provides an ioctl and mmap API to userspace.Thin abstraction layer between the vmm.ko ioctl interface and the userspace C API.The userspace bhyve component (kind of a very light-weight QEMU) that executes virtual machines. Has backends for Intel VMX and AMD SVM. Executes the two innermost vCPU runloops (VMX/SVM and interrupts/timers/paging). Contains a minimal x86 emulator to decode guest MMIO. Manages VM and vCPU objects, the guest physical address space and handles guest interaction with PIC, PIT, HPET, PM Timer, x(2)APIC and I/O-APIC. Is and emulator of Amstrad CPC and ZX Spectrum for Windows, Linux and MacOs.+-+-┼-The bhyve FreeBSD kernel module.Typically used to delete VM objects after use. Virtual machines and vCPUs can exist as kernel objects independently of a bhyve host process. Interacts with vmm.ko through libvmmapi.Somewhat superfluous utility to introspect and manage the life cycle of virtual machines. Manages ACPI, PCI and all non in-kernel devices.Xhyve architectureXhyve shares most of the code with bhyve but is architecturally very different. Linux, OpenBSD and NetBSD. It is used to bootstrap guest operating systems other than FreeBSD, i.e. Only then a VM can be executed by bhyve.Performs the same function as bhyveload but is a userspace port of GRUB2. It creates a VM object, loads the FreeBSD kernel into guest memory, sets up the initial vCPU state and then exits. This is a cumbersome workaround to bootstrap a FreeBSD guest operating system without using firmware.Hypervisor.framework seems to enforce a strict 1:1 relationship between a host process/VM and host thread/vCPU, that means VMs and vCPUs can only be interacted with by the processes and threads that created them. The vmm component provides a libvmmapi compatible interface to xhyve. SVM, PCI passthrough and the VMX host and EPT aspects are dropped. The VMX host state and all aspects of nested paging are handled by the macOS kernel, you can manage the guest physical address space simply through mapping of regions of your own address space.Xhyve is equivalent to the bhyve process but gains a subset of a userspace port of the vmm kernel module.
![]() It takes a bzImage and optionally initrd image and kernel parameter string as input.Xhyve can now boot an OS via EFI. Xhyve supports the Linux kexec protocol, a very simple and straightforward way to bootstrap a Linux kernel. Xhyve retains most of the bhyve command line interface.Bhyvectl, bhyveload and grub2-bhyve are incompatible with a single process model and are dropped. Multiple virtual machines can be created by launching multiple instances of xhyve. From Terminal, launch the xhyverun-tinycorelinux.sh script in your xhyve directory. Booting TinyCoreLinuxEverything needed to boot TinyCoreLinux is included with xhyve. NetworkingIf you want the same IP address across VM reboots, assign a UUID to a particular VM:Where X is your tap device, i.e. Use your favorite text editor to edit the xhyverun-freebsd.sh script and properly set the paths to the iso and disk image mkfile 5g FreeBSD.dmg - Create a blank image to install to Build xhyve with make (type make in Terminal from your xhyve directory) - this will build an unsigned copy of xhyve The bhyve EFI - this can be downloaded in FreeBSD via pkg install bhyve-firmware - the EFI will be named "BHYVE_UEFI.fd" and installed into /usr/local/share/uefi-firmware. This can be downloaded from Microsoft: Windows 10 iso This will only work with an unsigned build of xhyve - See Codesigning/Entitlements in IssuesNow that xhyve has support for a framebuffer, EFI and the e1000 NIC, xhyve can now run Windows in a VM. /xhyverun-freebsd.sh and enter your admin password The e1000 emulation works, but is incomplete - network statistics don't appear in Task Manager or Resource Monitor Windows does not recognize more than one CPU and the CPU device is missing from Device Manager Connect the VNC client to 127.0.0.1:29000 From Terminal, launch the modified xhyverun-windows.sh script in your xhyve directory. Use your favorite text editor to edit the xhyverun-windows.sh script and properly set the paths to the iso, disk image and BHYVE_UEFI.fd mkfile 20g Windows.dmg - Create a blank image to install to Emulator Update To NewestThe code signing/entitlement requirement can be bypassed by running xhyve as root (via sudo). (see issues #5 and #9 for the full context) Code signing/EntitlementsMacOS limits access to the networking API (vmnet) to builds that are code signed and have the appropriate entitlement. This is due to a VirtualBox bug (that got fixed in newest VirtualBox versions) as VirtualBox wasn't playing nice with OSX's Hypervisor.framework used by xhyve.To get around this you either have to update to newest VirtualBox 4.3 or 5.0 or, if you for some reason are unable to update, to reboot your Mac after using VirtualBox and before attempting to use xhyve. Once Windows is installed, one can enable remote connection and connect with Microsoft Remote Desktop instead of the VNC client.If you are, or were, running any version of VirtualBox, prior to 4.3.30 or 5.0, and attempt to run xhyve, your system will immediately crash as a kernel panic is triggered. enable x2APIC MSRs (even faster) ( performance) enable APIC access page to speed up APIC emulation ( performance) Building xhyve via make does not. Building xhyve via xcodebuild signs the build. macOS does not support preadv/ pwritev, we need to serialize reads and writes for the time being until we find a better solution. some 32-bit guests are broken (support PAE paging in VMCS) use hardware VMX preemption timer instead of pthread_cond_wait ( performance) use per vCPU timer event thread ( performance)? fix races or perhaps replace with something better
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