tests: Add migration test for aarch64

This patchset adds a migration test for aarch64. It leverages Dave Gilbert's migration boot block patches to create a new test case for aarch64.

V8->V9:
* Remove accel= setting for AArch64. It uses the default "kvm:tcg" now
* Revise the header file comment (suggested by drjones)
* Name x86 directory to i386 instead of x86_64; change Makefile accordingly
* Remove $(ARCH) from the assembly and header file names

V7->V8:
* Support cross compilation by searching for CROSS_CC_GUEST option, instead of using the find-cross-prefix defined in roms/Makefile
* Use the "max" options for ARM guest VM's CPU and GIC types
* $(TARGET)/Makefile rules are rewritten based on Laurent Vivier's comment
* NOTE: because Patch 1/2 is re-written, I remove the "Reviewed-by" for reviewers to take a look again. Thanks.

V6->V7:
* Define test memory start/end addresses for all architectures
* Check aarch64 kernel binary size, limit under 512KB

V5->V6:
* Add Reviewed-by to patch 1-3
* Add more design notes in patch 4 (aarch64 assembly compilation, bin space)

V4->V5:
* Extract cross compilation detection code into rules.mak for sharing
* Minor comment and code revision in migration-test.c & aarch64-a-b-kernel.S

V3->V4:
* Rename .s to .S, allowing assembly to include C-style header file
* Move test defines into a new migration-test.h file
* Use different cpu & gic settings for kvm and tcg modes on aarch64
* Clean up aarch64-a-b-kernel.S based on Andrew Jones' comments

V2->V3:
* Convert build script to Makefile
* Add cross-compilation support
* Fix CPU type for "tcg" machine type
* Revise asm code and the compilation process from asm to header file

V1->V2:
* Similar to Dave Gilbert's recent changes to migration-test, we provide the test source and a build script in V2.
* aarch64 kernel blob is defined as "unsigned char" because the source is now provided in V2.
* Add "-machine none" to test_deprecated() because aarch64 doesn't have a default machine type.

RFC->V1:
* aarch64 kernel blob is defined as an uint32_t array
* The test code is re-written to address a data caching issue under KVM. Tests passed under both x86 and aarch64.
* Re-use init_bootfile_x86() for both x86 and aarch64
* Other minor fixes

Thanks,
-Wei

Wei Huang (4):
tests/migration: Convert x86 boot block compilation script into
Makefile
tests/migration: Support cross compilation in generating boot header
file
tests/migration: Add migration-test header file
tests: Add migration test for aarch64

 tests/Makefile.include                             |  1 +
 tests/migration-test.c                             | 57 +++++++++++-----
 tests/migration/Makefile                           | 35 ++++++++++
 tests/migration/aarch64/Makefile                   | 20 ++++++
 tests/migration/aarch64/a-b-kernel.S               | 75 ++++++++++++++++++++++
 tests/migration/aarch64/a-b-kernel.h               | 19 ++++++
 tests/migration/i386/Makefile                      | 22 +++++++
 .../{x86-a-b-bootblock.s => i386/a-b-bootblock.S}  |  4 --
 .../{x86-a-b-bootblock.h => i386/a-b-bootblock.h}  |  8 +--
 tests/migration/migration-test.h                   | 30 +++++++++
 tests/migration/rebuild-x86-bootblock.sh           | 33 ----------
 11 files changed, 248 insertions(+), 56 deletions(-)
 create mode 100644 tests/migration/Makefile
 create mode 100644 tests/migration/aarch64/Makefile
 create mode 100644 tests/migration/aarch64/a-b-kernel.S
 create mode 100644 tests/migration/aarch64/a-b-kernel.h
 create mode 100644 tests/migration/i386/Makefile
 rename tests/migration/{x86-a-b-bootblock.s => i386/a-b-bootblock.S} (93%)
 rename tests/migration/{x86-a-b-bootblock.h => i386/a-b-bootblock.h} (92%)
 create mode 100644 tests/migration/migration-test.h
 delete mode 100755 tests/migration/rebuild-x86-bootblock.sh

1.8.3.1