This patch series provides a userspace interface for creating and running guest virtual machines while running on the Microsoft Hypervisor [0]. Since managing guest machines can only be done when Linux is the root partition, this series depends on the RFC already posted by Wei Liu: https://lore.kernel.org/linux-hyperv/20201105165814.29233-1-wei.liu@xxxxxxxxxx/T/#t The first two patches provide some helpers for converting hypervisor status codes to linux error codes, and easily printing hypervisor status codes to dmesg for debugging. Hyper-V related headers asm-generic/hyperv-tlfs.h and x86/asm/hyperv-tlfs.h are split into uapi and non-uapi. The uapi versions contain structures used in both the ioctl interface and the kernel. The mshv API is introduced in virt/mshv/mshv_main.c. As each interface is introduced, documentation is added in Documentation/virt/mshv/api.rst. The API is file-desciptor based, like KVM. The entry point is /dev/mshv. /dev/mshv ioctls: MSHV_REQUEST_VERSION MSHV_CREATE_PARTITION Partition (vm) ioctls: MSHV_MAP_GUEST_MEMORY, MSHV_UNMAP_GUEST_MEMORY MSHV_INSTALL_INTERCEPT MSHV_ASSERT_INTERRUPT MSHV_GET_PARTITION_PROPERTY, MSHV_SET_PARTITION_PROPERTY MSHV_CREATE_VP Vp (vcpu) ioctls: MSHV_GET_VP_REGISTERS, MSHV_SET_VP_REGISTERS MSHV_RUN_VP MSHV_GET_VP_STATE, MSHV_SET_VP_STATE mmap() (register page) [0] Hyper-V is more well-known, but it really refers to the whole stack including the hypervisor and other components that run in Windows kernel and userspace. Nuno Das Neves (18): x86/hyperv: convert hyperv statuses to linux error codes asm-generic/hyperv: convert hyperv statuses to strings virt/mshv: minimal mshv module (/dev/mshv/) virt/mshv: request version ioctl virt/mshv: create partition ioctl virt/mshv: create, initialize, finalize, delete partition hypercalls virt/mshv: withdraw memory hypercall virt/mshv: map and unmap guest memory virt/mshv: create vcpu ioctl virt/mshv: get and set vcpu registers ioctls virt/mshv: set up synic pages for intercept messages virt/mshv: run vp ioctl and isr virt/mshv: install intercept ioctl virt/mshv: assert interrupt ioctl virt/mshv: get and set vp state ioctls virt/mshv: mmap vp register page virt/mshv: get and set partition property ioctls virt/mshv: Add enlightenment bits to create partition ioctl .../userspace-api/ioctl/ioctl-number.rst | 2 + Documentation/virt/mshv/api.rst | 173 ++ arch/x86/Kconfig | 2 + arch/x86/hyperv/Kconfig | 22 + arch/x86/hyperv/Makefile | 4 + arch/x86/hyperv/hv_init.c | 2 +- arch/x86/hyperv/hv_proc.c | 40 +- arch/x86/include/asm/hyperv-tlfs.h | 44 +- arch/x86/include/asm/mshyperv.h | 1 + arch/x86/include/uapi/asm/hyperv-tlfs.h | 1312 +++++++++++ arch/x86/kernel/cpu/mshyperv.c | 16 + include/asm-generic/hyperv-tlfs.h | 324 ++- include/asm-generic/mshyperv.h | 3 + include/linux/mshv.h | 61 + include/uapi/asm-generic/hyperv-tlfs.h | 160 ++ include/uapi/linux/mshv.h | 109 + virt/mshv/mshv_main.c | 2054 +++++++++++++++++ 17 files changed, 4178 insertions(+), 151 deletions(-) create mode 100644 Documentation/virt/mshv/api.rst create mode 100644 arch/x86/hyperv/Kconfig create mode 100644 arch/x86/include/uapi/asm/hyperv-tlfs.h create mode 100644 include/linux/mshv.h create mode 100644 include/uapi/asm-generic/hyperv-tlfs.h create mode 100644 include/uapi/linux/mshv.h create mode 100644 virt/mshv/mshv_main.c -- 2.25.1
