This directory contains a wide range of patches provide
by Alexander Kudryavtsev (a.o.kudryavtsev@gmail.com) of the
Institute for System Programming of the  Russian Academy of Sciences
(ISP-RAS: http://ispras.ru/en/).   These patches are currently under
review for inclusion in mainline Palacios devel branch.   

A description of the patches from Alexander Kudryavtsev is given below.

The V3VEE project is thankful for these patches.

==============================

Hello everyone!

I represent a team working in the virtualization area at ISP RAS
(http://ispras.ru/en/). Since August 2011 we started investigating
Palacios. Our first goal was to reproduce Palacios authors results.

While working with Palacios, we needed some features. We implemented
these features, here is the list (not complete):

1. PCI Capabilities passthrough support (patch 0002). It is required
by many devices to see their capabilities to work correctly. Only PCI
(256 bytes) capabilities are supported.

2. PCI MSI (message-signalled interrupts) support (patches 3, 4, 5,
18, 20, 28, 32). It includes MSI interrupt router and support for MSI
capability passthrough. We tested MSI with 2.6.18 and 2.6.32 guests on
different hardware. MSI capability passthrough required real APIC ID
retrieving, so we changed OS interface. Patch for Kitten OS is
attached.

3. PCI MSI-X support (patches 12, 29, 31). It allows many interrupts
per device and is required on some server hardware. MSI-X support is
included inside MSI router. Code for MSI-X passthrough is present, but
currently it is not working.

4. Support for deferred EOI (End of interrupt) for passed through
devices (patches 6-7). It is required for some devices to
work. Support from host OS is also required, patch for Kitten is
attached.

5. VMX, EPT related fixes (patches 8, 9, 10, 13, 22, 23, 24, 26). Some
of them became not relevant. EPT fix enables caching of guest memory
and of EPT tables, highly increasing guest speed.

6. PCI-2-PCI bridge support (patch 15), SMBIOS device support (patch
17) - these two patches were required by one of our test Infiniband
card driver to work inside guest.

Kitten patches are the following:

1. Report real APIC ID to Palacios. It is required for MSI/MSI-X
passthrough handling. (palacios-get-apic-id)

2. Do not perform EOI for devices owned by Palacios. (no-palacios-eoi)


We propose these patches with the hope that they may help developing
Palacios. These patches could be applied onto commit
840a7c8a40cbb875c1c748845f093ff898e99766 and represent our local
branch. Some patches contain the same fixes which can be found in
Palacios development branch. We do not rebase our changes on
Release-1.3 branch since we don't know which of these changes you
would like to use and our resources are limited. We will be happy to
answer your questions.