Re: [PATCH v2 00/20] KVM: selftests: PPC pre-enabling

On Wed, Sep 02, 2026 at 09:41:03AM -0700, Sean Christopherson wrote:

This is a big pile of cleanups and refactoring to prepare for PPC support in
KVM selftests.  PPC has paging modes that require multi-page page tables, and
those page tables need to be naturally aligned.  The original proposal was to
plumb in an @align param to the page allocators[*], but I didn't love the idea
of adding another rarely used param to the allocators.

v2:
 - Collect tags. [Itaru, Bibo]

I ran kvm_page_table_test for arm64 again it went ok on HW.

Tested-by: Itaru Kitayam <redacted>

Thanks,
Itaru.

 - Use 0x180000 as the min GPA for page table pages on LoongArch, instead of
   changing every other arch to use 0x200000. [Sashiko, Bibo]
 - Opportunistically move the vGIC LPI stress test's global "gpa_base" variable
   into setup_memslot(). [Sashiko]

v1: https://lore.kernel.org/all/20260826230511.972824-1-seanjc@google.com (local)

[*] https://lore.kernel.org/all/df86b5ccdbdafc3509d9538bd5e6796737bab2db.1781093720.git.ritesh.list@gmail.com (local)

Nicholas Piggin (1):
  KVM: selftests: Use goto instead of do-while to retry finding unused
    physical pages

Sean Christopherson (19):
  KVM: selftests: Use MEM_REGION_PT memslot instead of '0' for s390
    regions/segments
  KVM: selftests: Use the common minimum GPA for page tables on
    LoongArch
  KVM: selftests: Use vm_alloc_page_table() to allocate LoongArch page
    tables
  KVM: selftests: Rename "num" param to "nr_pages" for physical page
    allocators
  KVM: selftests: Extend page allocator to support naturally aligned
    allocations
  KVM: selftests: Make the single-page allocator APIs static inline
  KVM: selftests: Use the innermost page allocator API in the memslot
    perf test
  KVM: selftests: Use the innermost page allocator API in s390's IRQ
    routing test
  KVM: selftests: Add a wrapper API to allocate multiple page table
    pages
  KVM: selftests: Initialize vm->memslots[] with invalid memslots during
    creation
  KVM: selftests: Add APIs to override memory region types with custom
    memslots
  KVM: selftests: Add TEST_EXTRA memory region type for "special"
    memslots
  KVM: selftests: Use TEST_EXTRA region in arm64's vGIC LPI stress test
  KVM: selftests: Use TEST_EXTRA region in x86's smaller MAXPHYADDR test
  KVM: selftests: Use TEST_EXTRA region in set memory region test
  KVM: selftests: Take the memory region type, not memslot, in page
    allocators
  KVM: selftests: Use TEST_ASSERT(), not assert(), in
    vm_get_mem_region()
  KVM: selftests: Automatically pick min_gpa for allocations based on
    region type
  KVM: selftests: Add arch hook to force page tables to be naturally
    aligned

 .../selftests/kvm/arm64/page_fault_test.c     |  18 ++-
 .../selftests/kvm/arm64/vgic_lpi_stress.c     |  21 ++-
 .../testing/selftests/kvm/include/kvm_util.h  | 106 +++++++++++++--
 tools/testing/selftests/kvm/include/x86/smm.h |   2 +-
 .../selftests/kvm/lib/arm64/processor.c       |   4 +-
 tools/testing/selftests/kvm/lib/kvm_util.c    | 127 +++++++++++-------
 .../selftests/kvm/lib/loongarch/processor.c   |   5 +-
 .../selftests/kvm/lib/riscv/processor.c       |   4 +-
 .../selftests/kvm/lib/s390/processor.c        |   7 +-
 .../testing/selftests/kvm/lib/x86/processor.c |  15 ++-
 .../testing/selftests/kvm/memslot_perf_test.c |   3 +-
 tools/testing/selftests/kvm/s390/cmma_test.c  |  19 +--
 .../testing/selftests/kvm/s390/irq_routing.c  |   2 +-
 .../selftests/kvm/set_memory_region_test.c    |   8 +-
 .../x86/smaller_maxphyaddr_emulation_test.c   |   9 +-
 15 files changed, 221 insertions(+), 129 deletions(-)


base-commit: 76671054f9a1ff6abb976583cd8da37650acdc97
-- 
2.55.0.966.g6673acef38-goog