Gunyah is a Type-1 hypervisor independent of any high-level OS kernel, and runs in a higher CPU privilege level. It does not depend on any lower-privileged OS kernel/code for its core functionality. This increases its security and can support a much smaller trusted computing base than a Type-2 hypervisor. Gunyah is an open source hypervisor. The source repo is available at https://github.com/quic/gunyah-hypervisor. The diagram below shows the architecture. :: Primary VM Secondary VMs +-----+ +-----+ | +-----+ +-----+ +-----+ | | | | | | | | | | | EL0 | APP | | APP | | | APP | | APP | | APP | | | | | | | | | | | | +-----+ +-----+ | +-----+ +-----+ +-----+ ---------------------|------------------------- +--------------+ | +----------------------+ | | | | | EL1 | Linux Kernel | | |Linux kernel/Other OS | ... | | | | | +--------------+ | +----------------------+ --------hvc/smc------|------hvc/smc------------ +----------------------------------------+ | | EL2 | Gunyah Hypervisor | | | +----------------------------------------+ Gunyah provides these following features. - Threads and Scheduling: The scheduler schedules virtual CPUs (VCPUs) on physical CPUs and enables time-sharing of the CPUs. - Memory Management: Gunyah tracks memory ownership and use of all memory under its control. Memory partitioning between VMs is a fundamental security feature. - Interrupt Virtualization: All interrupts are handled in the hypervisor and routed to the assigned VM. - Inter-VM Communication: There are several different mechanisms provided for communicating between VMs. - Device Virtualization: Para-virtualization of devices is supported using inter-VM communication. Low level system features and devices such as interrupt controllers are supported with emulation where required. Elliot Berman (11): docs: gunyah: Introduce Gunyah Hypervisor dt-bindings: Add binding for gunyah hypervisor arm64: gunyah: Add Gunyah hypercalls ABI gunyah: Common types and error codes for Gunyah hypercalls virt: gunyah: Add sysfs nodes virt: gunyah: Add capabilities bus and devices gunyah: msgq: Add Gunyah message queues gunyah: rsc_mgr: Add resource manager RPC core gunyah: rsc_mgr: Add auxiliary devices for console gunyah: rsc_mgr: Add RPC for console services gunyah: Add tty console driver for RM Console Serivces .../ABI/testing/sysfs-hypervisor-gunyah | 37 + .../bindings/firmware/gunyah-hypervisor.yaml | 84 +++ Documentation/virt/gunyah/index.rst | 99 +++ Documentation/virt/gunyah/message-queue.rst | 52 ++ Documentation/virt/index.rst | 1 + MAINTAINERS | 12 + arch/arm64/include/asm/gunyah.h | 142 ++++ drivers/virt/Kconfig | 1 + drivers/virt/Makefile | 1 + drivers/virt/gunyah/Kconfig | 24 + drivers/virt/gunyah/Makefile | 8 + drivers/virt/gunyah/device.c | 108 +++ drivers/virt/gunyah/gunyah_private.h | 18 + drivers/virt/gunyah/msgq.c | 223 ++++++ drivers/virt/gunyah/rsc_mgr.c | 682 ++++++++++++++++++ drivers/virt/gunyah/rsc_mgr.h | 56 ++ drivers/virt/gunyah/rsc_mgr_console.c | 405 +++++++++++ drivers/virt/gunyah/rsc_mgr_rpc.c | 151 ++++ drivers/virt/gunyah/sysfs.c | 176 +++++ include/linux/gunyah.h | 133 ++++ include/linux/gunyah_rsc_mgr.h | 45 ++ 21 files changed, 2458 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-hypervisor-gunyah create mode 100644 Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml create mode 100644 Documentation/virt/gunyah/index.rst create mode 100644 Documentation/virt/gunyah/message-queue.rst create mode 100644 arch/arm64/include/asm/gunyah.h create mode 100644 drivers/virt/gunyah/Kconfig create mode 100644 drivers/virt/gunyah/Makefile create mode 100644 drivers/virt/gunyah/device.c create mode 100644 drivers/virt/gunyah/gunyah_private.h create mode 100644 drivers/virt/gunyah/msgq.c create mode 100644 drivers/virt/gunyah/rsc_mgr.c create mode 100644 drivers/virt/gunyah/rsc_mgr.h create mode 100644 drivers/virt/gunyah/rsc_mgr_console.c create mode 100644 drivers/virt/gunyah/rsc_mgr_rpc.c create mode 100644 drivers/virt/gunyah/sysfs.c create mode 100644 include/linux/gunyah.h create mode 100644 include/linux/gunyah_rsc_mgr.h -- 2.25.1
