acrn-hypervisor/hypervisor
Li Fei1 e5c7a96513 hv: vpci: sos could access low severity guest pci cfg space
There're some cases the SOS (higher severity guest) needs to access the
post-launched VM (lower severity guest) PCI CFG space:
1. The SR-IOV PF needs to reset the VF
2. Some pass through device still need DM to handle some quirk.
In the case a device is assigned to a UOS and is not in a zombie state, the SOS
is able to access, if and only if the SOS has higher severity than the UOS.

Tracked-On: #4371
Signed-off-by: Li Fei1 <fei1.li@intel.com>
2020-03-20 10:08:43 +08:00
..
acpi_parser hv:refine comment about intel integrated gpu dmar 2020-02-28 09:14:27 +08:00
arch/x86 hv: vpci: sos could access low severity guest pci cfg space 2020-03-20 10:08:43 +08:00
boot hv: fixup relocation delta for symbols belong to entry section 2020-03-06 08:27:46 +08:00
bsp/ld hv: fixup relocation delta for symbols belong to entry section 2020-03-06 08:27:46 +08:00
common hv:Rename two VM states 2020-03-13 10:34:29 +08:00
debug hv:Rename two VM states 2020-03-13 10:34:29 +08:00
dm hv: vpci: sos could access low severity guest pci cfg space 2020-03-20 10:08:43 +08:00
hw hv: pci: rename CFG read/write function for PCI-compatible Configuration Mechanism 2020-03-12 09:17:02 +08:00
include hv: vpci: sos could access low severity guest pci cfg space 2020-03-20 10:08:43 +08:00
lib hv:tiny cleanup 2019-09-05 09:58:47 +08:00
pre_build hv: add static check for CONFIG_HV_RAM_START and CONFIG_HV_RAM_SIZE 2020-03-11 10:37:50 +08:00
release hv: pci: rename CFG read/write function for PCI-compatible Configuration Mechanism 2020-03-12 09:17:02 +08:00
scenarios HV: update ept address range for pre-launched VM 2020-03-12 14:56:34 +08:00
scripts Makefile: move .mk file to hv scripts folder 2019-11-13 16:05:30 +08:00
Kconfig HV: config: add Kconfig and defconfigs for sbl & uefi 2018-06-08 17:21:13 +08:00
MAINTAINERS update home page information 2018-05-15 17:19:39 +08:00
Makefile HV: decouple prelaunch VM ve820 from board configs 2020-03-12 14:56:34 +08:00
README.rst doc: fix utf-8 punctuation, branding, spelling 2019-03-14 09:13:58 -07:00

ACRN Hypervisor
###############

The open source `Project ACRN`_ defines a device hypervisor reference stack and
an architecture for running multiple software subsystems, managed securely, on
a consolidated system by means of a virtual machine manager. It also defines a
reference framework implementation for virtual device emulation, called the
"ACRN Device Model".

The ACRN Hypervisor 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. The ACRN hypervisor addresses the gap that currently exists
between datacenter hypervisors, and hard partitioning hypervisors. The ACRN
hypervisor architecture partitions the system into different functional
domains, with carefully selected guest OS sharing optimizations for IoT and
embedded devices.

You can find out more about Project ACRN on the `Project ACRN documentation`_
website.

.. _`Project ACRN`: https://projectacrn.org
.. _`ACRN Hypervisor`: https://github.com/projectacrn/acrn-hypervisor
.. _`Project ACRN documentation`: https://projectacrn.github.io/