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On 9/22/2020 19:42, shuo.a....@intel.com wrote: > From: Shuo Liu <shuo.a....@intel.com> > > ACRN is a Type 1 reference hypervisor stack, running directly on the > bare-metal > hardware, and is suitable for a variety of IoT and embedded device solutions. > > ACRN implements a hybrid VMM architecture, using a privileged Service VM. The > Service VM manages the system resources (CPU, memory, etc.) and I/O devices of > User VMs. Multiple User VMs are supported, with each of them running Linux, > Android OS or Windows. Both Service VM and User VMs are guest VM. > > Below figure shows the architecture. > > Service VM User VM > +----------------------------+ | +------------------+ > | +--------------+ | | | | > | |ACRN userspace| | | | | > | +--------------+ | | | | > |-----------------ioctl------| | | | ... > |kernel space +----------+ | | | | > | | HSM | | | | Drivers | > | +----------+ | | | | > +--------------------|-------+ | +------------------+ > +---------------------hypercall----------------------------------------+ > | ACRN Hypervisor | > +----------------------------------------------------------------------+ > | Hardware | > +----------------------------------------------------------------------+ > > There is only one Service VM which could run Linux as OS. > > In a typical case, the Service VM will be auto started when ACRN Hypervisor is > booted. Then the ACRN userspace (an application running in Service VM) could > be > used to start/stop User VMs by communicating with ACRN Hypervisor Service > Module (HSM). > > ACRN Hypervisor Service Module (HSM) is a middle layer that allows the ACRN > userspace and Service VM OS kernel to communicate with ACRN Hypervisor > and manage different User VMs. This middle layer provides the following > functionalities, > - Issues hypercalls to the hypervisor to manage User VMs: > * VM/vCPU management > * Memory management > * Device passthrough > * Interrupts injection > - I/O requests handling from User VMs. > - Exports ioctl through HSM char device. > - Exports function calls for other kernel modules > > ACRN is focused on embedded system. So it doesn't support some features. > E.g., > - ACRN doesn't support VM migration. > - ACRN doesn't support vCPU migration. > > This patch set adds the HSM to the Linux kernel. > > The basic ARCN support was merged to upstream already. > https://lore.kernel.org/lkml/1559108037-18813-3-git-send-email-yakui.z...@intel.com/ > > ChangeLog: > v4: > - Used acrn_dev.this_device directly for dev_*() (Reinette) > - Removed the odd usage of {get|put}_device() on &acrn_dev->this_device > (Greg) > - Removed unused log code. (Greg) > - Corrected the return error values. (Greg) > - Mentioned that HSM relies hypervisor for sanity check in acrn_dev_ioctl() > comments (Greg) > > v3: > - Used {get|put}_device() helpers on &acrn_dev->this_device > - Moved unused code from front patches to later ones. > - Removed self-defined pr_fmt() and dev_fmt() > - Provided comments for acrn_vm_list_lock. > > v2: > - Removed API version related code. (Dave) > - Replaced pr_*() by dev_*(). (Greg) > - Used -ENOTTY as the error code of unsupported ioctl. (Greg) > > Shuo Liu (16): > docs: acrn: Introduce ACRN > x86/acrn: Introduce acrn_{setup, remove}_intr_handler() > x86/acrn: Introduce hypercall interfaces > virt: acrn: Introduce ACRN HSM basic driver > virt: acrn: Introduce VM management interfaces > virt: acrn: Introduce an ioctl to set vCPU registers state > virt: acrn: Introduce EPT mapping management > virt: acrn: Introduce I/O request management > virt: acrn: Introduce PCI configuration space PIO accesses combiner > virt: acrn: Introduce interfaces for PCI device passthrough > virt: acrn: Introduce interrupt injection interfaces > virt: acrn: Introduce interfaces to query C-states and P-states > allowed by hypervisor > virt: acrn: Introduce I/O ranges operation interfaces > virt: acrn: Introduce ioeventfd > virt: acrn: Introduce irqfd > virt: acrn: Introduce an interface for Service VM to control vCPU > > Yin Fengwei (1): > x86/acrn: Introduce an API to check if a VM is privileged > > .../userspace-api/ioctl/ioctl-number.rst | 1 + > Documentation/virt/acrn/index.rst | 11 + > Documentation/virt/acrn/introduction.rst | 40 ++ > Documentation/virt/acrn/io-request.rst | 97 +++ > Documentation/virt/index.rst | 1 + > MAINTAINERS | 9 + > arch/x86/include/asm/acrn.h | 74 ++ > arch/x86/kernel/cpu/acrn.c | 35 +- > drivers/virt/Kconfig | 2 + > drivers/virt/Makefile | 1 + > drivers/virt/acrn/Kconfig | 15 + > drivers/virt/acrn/Makefile | 3 + > drivers/virt/acrn/acrn_drv.h | 229 +++++++ > drivers/virt/acrn/hsm.c | 437 ++++++++++++ > drivers/virt/acrn/hypercall.h | 254 +++++++ > drivers/virt/acrn/ioeventfd.c | 273 ++++++++ > drivers/virt/acrn/ioreq.c | 645 ++++++++++++++++++ > drivers/virt/acrn/irqfd.c | 235 +++++++ > drivers/virt/acrn/mm.c | 305 +++++++++ > drivers/virt/acrn/vm.c | 126 ++++ > include/uapi/linux/acrn.h | 486 +++++++++++++ > 21 files changed, 3278 insertions(+), 1 deletion(-) > create mode 100644 Documentation/virt/acrn/index.rst > create mode 100644 Documentation/virt/acrn/introduction.rst > create mode 100644 Documentation/virt/acrn/io-request.rst > create mode 100644 arch/x86/include/asm/acrn.h > create mode 100644 drivers/virt/acrn/Kconfig > create mode 100644 drivers/virt/acrn/Makefile > create mode 100644 drivers/virt/acrn/acrn_drv.h > create mode 100644 drivers/virt/acrn/hsm.c > create mode 100644 drivers/virt/acrn/hypercall.h > create mode 100644 drivers/virt/acrn/ioeventfd.c > create mode 100644 drivers/virt/acrn/ioreq.c > create mode 100644 drivers/virt/acrn/irqfd.c > create mode 100644 drivers/virt/acrn/mm.c > create mode 100644 drivers/virt/acrn/vm.c > create mode 100644 include/uapi/linux/acrn.h > > > base-commit: 18445bf405cb331117bc98427b1ba6f12418ad17 >
