[v4,0/4] KVM: selftests: add powerpc support

Message

Nicholas Piggin Nov. 20, 2023, 12:29 p.m. UTC

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

Since v3:
https://lore.kernel.org/linuxppc-dev/[e-mail]/
- Rebased to upstream (on top of Sean's ucall and guest assert
  rework).
- Drop powerpc specific tests for now, concentrate on base enablement.
- Fix a bunch of bugs and issues including the ones noticed by Joel
  in v3:
- Work around powerpc's max VCPU ID complexity to fix test case failure.
- Use TEST_REQUIRE for radix mode so hash hosts don't assert.
- Pack page table "fragments" in pages (like Linux kernel does), which
  fixes PTE memory consumption estimation and prevents the max memory
  test from failing with no memory for page tables.

Since v2:
- Added a couple of new tests (patch 5,6)
- Make default page size match host page size.
- Check for radix MMU capability.
- Build a few more of the generic tests.

Since v1:
- Update MAINTAINERS KVM PPC entry to include kvm selftests.
- Fixes and cleanups from Sean's review including new patch 1.
- Add 4K guest page support requiring new patch 2.

Thanks,
Nick

Nicholas Piggin (4):
  KVM: selftests: Move pgd_created check into virt_pgd_alloc
  KVM: selftests: Add aligned guest physical page allocator
  KVM: PPC: selftests: add support for powerpc
  KVM: PPC: selftests: powerpc enable kvm_create_max_vcpus test

 MAINTAINERS                                   |   2 +
 tools/testing/selftests/kvm/Makefile          |  20 +
 .../selftests/kvm/include/kvm_util_base.h     |  31 ++
 .../selftests/kvm/include/powerpc/hcall.h     |  17 +
 .../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      |   9 +
 .../selftests/kvm/lib/aarch64/processor.c     |   4 -
 tools/testing/selftests/kvm/lib/guest_modes.c |  27 +-
 tools/testing/selftests/kvm/lib/kvm_util.c    |  56 ++-
 .../selftests/kvm/lib/powerpc/handlers.S      |  93 ++++
 .../testing/selftests/kvm/lib/powerpc/hcall.c |  45 ++
 .../selftests/kvm/lib/powerpc/processor.c     | 468 ++++++++++++++++++
 .../testing/selftests/kvm/lib/powerpc/ucall.c |  21 +
 .../selftests/kvm/lib/riscv/processor.c       |   4 -
 .../selftests/kvm/lib/s390x/processor.c       |   4 -
 .../selftests/kvm/lib/x86_64/processor.c      |   7 +-
 tools/testing/selftests/kvm/powerpc/helpers.h |  46 ++
 19 files changed, 908 insertions(+), 38 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/powerpc/hcall.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
 create mode 100644 tools/testing/selftests/kvm/powerpc/helpers.h