[PATCH v2 00/11] Drivers for gunyah hypervisor

[Elliot Berman]

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