arm/arm64: Add ITS tests

This series is a revival of an RFC series sent in Dec 2016 [1]. Given the amount of code and the lack of traction at that time, I haven't respinned until now. However a recent bug found related to the ITS migration convinced me that this work may deserve to be respinned and enhanced.

Tests exercise main ITS commands and also test migration. With the migration framework, we are able to trigger the migration from guest and that is very practical actually.

What is particular with the ITS programming is that most of the commands are passed through queues and there is real error handling. Invalid commands are just ignored and that is not really tester friendly.

The series can be fount at:
https://github.com/eauger/kut/tree/its-v8

Applies on top of arm/queue.

Best Regards

Eric

History:

v7 -> v8:
- take into account last comments from Zenghui and collected his R-bs

v6 -> v7:
- Fixed issue reported by Drew in its-migrate-unmapped-collection (a collection could be allocated twice depending on the SMP value)
- Integrated changes prepared by Drew
- Use for_each_present_cpu()

v5 -> v6:
- Took into account Zenghui's comments, mostly functional: see invidual history logs
- fix wrong assert!

v4 -> v5:
- 32b stubs moved back to arm/gic.c
- some changes reordering
- minor style issues

v3 -> v4:
- addressed comments from Drew and Zenghui
- added "page_alloc: Introduce get_order()"
- removed "arm: gic: Provide per-IRQ helper functions"
- ITS files moved to lib64
- and many more, see individual logs

v2 -> v3:
- fix 32b compilation
- take into account Drew's comments (see individual diff logs)

v1 -> v2:
- took into account Zenghui's comments
- collect R-b's from Thomas

References:
[1] [kvm-unit-tests RFC 00/15] arm/arm64: add ITS framework

    https://lists.gnu.org/archive/html/qemu-devel/2016-12/msg00575.html

Execution:
x For other ITS tests:
./run_tests.sh -g its

x non migration tests can be launched invidually. For instance:
./arm-run arm/gic.flat -smp 8 -append 'its-trigger'

Eric Auger (13):
libcflat: Add other size defines
page_alloc: Introduce get_order()
arm/arm64: gic: Introduce setup_irq() helper arm/arm64: gicv3: Add some re-distributor defines arm/arm64: gicv3: Set the LPI config and pending tables arm/arm64: ITS: Introspection tests
arm/arm64: ITS: its_enable_defaults
arm/arm64: ITS: Device and collection Initialization arm/arm64: ITS: Commands
arm/arm64: ITS: INT functional tests
arm/run: Allow Migration tests
arm/arm64: ITS: migration tests
arm/arm64: ITS: pending table migration test

 arm/Makefile.arm64         |   1 +
 arm/Makefile.common        |   2 +-
 arm/gic.c                  | 454 ++++++++++++++++++++++++++++++++++--
 arm/run                    |   2 +-
 arm/unittests.cfg          |  38 +++
 lib/alloc_page.c           |   7 +-
 lib/alloc_page.h           |   1 +
 lib/arm/asm/gic-v3-its.h   |  27 +++
 lib/arm/asm/gic-v3.h       |  29 +++
 lib/arm/asm/gic.h          |   1 +
 lib/arm/asm/processor.h    |   2 +
 lib/arm/gic-v3.c           |  78 +++++++
 lib/arm/gic.c              |  40 +++-
 lib/arm/io.c               |  28 +++
 lib/arm64/asm/gic-v3-its.h | 174 ++++++++++++++
 lib/arm64/gic-v3-its-cmd.c | 459 +++++++++++++++++++++++++++++++++++++
 lib/arm64/gic-v3-its.c     | 171 ++++++++++++++
 lib/libcflat.h             |   3 +
 18 files changed, 1486 insertions(+), 31 deletions(-)
 create mode 100644 lib/arm/asm/gic-v3-its.h
 create mode 100644 lib/arm64/asm/gic-v3-its.h
 create mode 100644 lib/arm64/gic-v3-its-cmd.c
 create mode 100644 lib/arm64/gic-v3-its.c

2.20.1