KVM: selftests: add powerpc support

Patch v5 -> v7:
================
(Suggestions from Sean):
1. Added kvm_is_ppc_pseries_lpar() helper in kvm_util.h to avoid sprinkling multiple #ifdef __powerpc64__ checks.
2. Enable all tests via TEST_GEN_PROGS_COMMON for powerpc
3. Enable hardware_disable_test and skip when running on powerpc pseries LPAR (nested).
4. Re-arranged the fixes in appropriate order.

This is based off v2 of Sean PPC pre-enablement series [1].
[1]: https://lore.kernel.org/kvm/[email protected]/

Patch v4 -> v5:
==============
- Fixed the issues reported by Anushree while running on kvm on powervm (nested).
- Fixed memslot_perf_test on powerpc.

PATCH v3 -> PATCH v4:
==================
- Rebased on top of Sean's new page allocator patch series v2 [1] This allowed to drop and patch-2 since it will now come from Sean's v2.
- Addressed review comments from Sean - squashed patches 6-10 in patch-1 of this.
- Dropped patch-5 to print vcpu_id when KVM_CREATE_VCPU ioctl fails.
- Added additional patch-3 to this series to allow dirty_log_test to run on all big-endian machines.

[1]: https://lore.kernel.org/kvm/[email protected]/
[v3]: https://lore.kernel.org/linuxppc-dev/2d2c46be7f051c7f1c645afaec67f57067d37a81.1781093720.git.ritesh.list@gmail.com/

Testing updates:
================
I have done some fair amount of testing of the selftests both on real HW and using various combinations on qemu (powernv+LE (default), pseries+cap-nested-hv, pseries+cap-nested-papr, powernv+BE). There were few powerpc kvm kernel fixes which were identified as part of this work. I will send those patches separately as those anyway needs to go in separately.

<pasted snippet of cover letter from previous versions>
=======================================================

Hi All,

This series primarly adds KVM selftests support for powerpc (64-bit, BookS, radix MMU).

This patch series is originally Nick's work. I have mainly only rebased it on the latest upstream tree. Since the rebase required few changes to all the four patches (Patch 1-4), I have dropped the earlier Acked-by from Michael Ellerman.

Since the last series was posted three years ago [1], I am resetting the version to RFC. This rebase was done as part of a larger effort to improve the selftests infrastructure for Linux on PowerPC tree. Thanks to Harsh and Maddy for their help on this.

Nicholas Piggin (1):
KVM: PPC: selftests: add support for powerpc

Ritesh Harjani (IBM) (7):
KVM: selftests: Don't limit LE dirty-bitmap bitops to s390x
KVM: selftests: Move memslot_perf_test off the 256M ELF load address
KVM: selftests: Skip the max vCPU ID test when KVM_CAP_PPC_SMT is set
KVM: selftests: Add helper for checking if running on powerpc pseries LPAR
KVM: selftests: Skip kvm_create_max_vcpus on powerpc pseries LPAR
KVM: selftests: Only warn for idle-page checks on powerpc pseries LPAR
KVM: selftests: Skip hardware_disable_test on powerpc pseries LPAR

 MAINTAINERS                                   |   2 +
 tools/testing/selftests/kvm/Makefile          |   2 +-
 tools/testing/selftests/kvm/Makefile.kvm      |   9 +
 .../selftests/kvm/access_tracking_perf_test.c |  10 +
 tools/testing/selftests/kvm/dirty_log_test.c  |  12 +-
 .../selftests/kvm/hardware_disable_test.c     |   3 +
 .../testing/selftests/kvm/include/kvm_util.h  |  26 +
 .../selftests/kvm/include/powerpc/hcall.h     |  17 +
 .../kvm/include/powerpc/kvm_util_arch.h       |  22 +
 .../selftests/kvm/include/powerpc/ppc_asm.h   |  32 ++
 .../selftests/kvm/include/powerpc/processor.h |  39 ++
 .../selftests/kvm/include/powerpc/ucall.h     |  21 +
 .../selftests/kvm/kvm_create_max_vcpus.c      |  14 +-
 tools/testing/selftests/kvm/lib/guest_modes.c |  20 +-
 tools/testing/selftests/kvm/lib/kvm_util.c    |   8 +
 .../selftests/kvm/lib/powerpc/handlers.S      |  93 ++++
 .../testing/selftests/kvm/lib/powerpc/hcall.c |  45 ++
 .../selftests/kvm/lib/powerpc/processor.c     | 512 ++++++++++++++++++
 .../testing/selftests/kvm/lib/powerpc/ucall.c |  22 +
 .../testing/selftests/kvm/memslot_perf_test.c |   2 +-
 20 files changed, 898 insertions(+), 13 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/hcall.h
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/kvm_util_arch.h
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/ppc_asm.h
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/processor.h
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/ucall.h
 create mode 100644 tools/testing/selftests/kvm/lib/powerpc/handlers.S
 create mode 100644 tools/testing/selftests/kvm/lib/powerpc/hcall.c
 create mode 100644 tools/testing/selftests/kvm/lib/powerpc/processor.c
 create mode 100644 tools/testing/selftests/kvm/lib/powerpc/ucall.c

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2.39.5