[GIT PULL] KVM: Selftests changes for 6.15, part 2

[Sean Christopherson]

Second selftests pull requests, i.e. the "real" 6.15 selftest pull request :-)

The following changes since commit a64dcfb451e254085a7daee5fe51bf22959d52d3:

  Linux 6.14-rc2 (2025-02-09 12:45:03 -0800)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests-6.15

for you to fetch changes up to 62838fa5eade1b23d546e81e7aab6d4c92ec12f2:

  KVM: selftests: Relax assertion on HLT exits if CPU supports Idle HLT (2025-02-28 15:42:28 -0800)

----------------------------------------------------------------
KVM selftests changes for 6.15, part 2

 - Fix a variety of flaws, bugs, and false failures/passes dirty_log_test, and
   improve its coverage by collecting all dirty entries on each iteration.

 - Fix a few minor bugs related to handling of stats FDs.

 - Add infrastructure to make vCPU and VM stats FDs available to tests by
   default (open the FDs during VM/vCPU creation).

 - Relax an assertion on the number of HLT exits in the xAPIC IPI test when
   running on a CPU that supports AMD's Idle HLT (which elides interception of
   HLT if a virtual IRQ is pending and unmasked).

 - Misc cleanups and fixes.

----------------------------------------------------------------
Colin Ian King (1):
      KVM: selftests: Fix spelling mistake "UFFDIO_CONINUE" -> "UFFDIO_CONTINUE"

Maxim Levitsky (2):
      KVM: selftests: Support multiple write retires in dirty_log_test
      KVM: selftests: Limit dirty_log_test's s390x workaround to s390x

Sean Christopherson (28):
      KVM: selftests: Actually emit forced emulation prefix for kvm_asm_safe_fep()
      KVM: selftests: Sync dirty_log_test iteration to guest *before* resuming
      KVM: selftests: Drop signal/kick from dirty ring testcase
      KVM: selftests: Drop stale srandom() initialization from dirty_log_test
      KVM: selftests: Precisely track number of dirty/clear pages for each iteration
      KVM: selftests: Read per-page value into local var when verifying dirty_log_test
      KVM: selftests: Continuously reap dirty ring while vCPU is running
      KVM: selftests: Honor "stop" request in dirty ring test
      KVM: selftests: Keep dirty_log_test vCPU in guest until it needs to stop
      KVM: selftests: Post to sem_vcpu_stop if and only if vcpu_stop is true
      KVM: selftests: Use continue to handle all "pass" scenarios in dirty_log_test
      KVM: selftests: Print (previous) last_page on dirty page value mismatch
      KVM: selftests: Collect *all* dirty entries in each dirty_log_test iteration
      KVM: sefltests: Verify value of dirty_log_test last page isn't bogus
      KVM: selftests: Ensure guest writes min number of pages in dirty_log_test
      KVM: selftests: Tighten checks around prev iter's last dirty page in ring
      KVM: selftests: Set per-iteration variables at the start of each iteration
      KVM: selftests: Fix an off-by-one in the number of dirty_log_test iterations
      KVM: selftests: Allow running a single iteration of dirty_log_test
      KVM: selftests: Fix mostly theoretical leak of VM's binary stats FD
      KVM: selftests: Close VM's binary stats FD when releasing VM
      KVM: selftests: Assert that __vm_get_stat() actually finds a stat
      KVM: selftests: Macrofy vm_get_stat() to auto-generate stat name string
      KVM: selftests: Add struct and helpers to wrap binary stats cache
      KVM: selftests: Get VM's binary stats FD when opening VM
      KVM: selftests: Adjust number of files rlimit for all "standard" VMs
      KVM: selftests: Add infrastructure for getting vCPU binary stats
      KVM: selftests: Relax assertion on HLT exits if CPU supports Idle HLT

 tools/testing/selftests/kvm/dirty_log_test.c       | 521 ++++++++++-----------
 tools/testing/selftests/kvm/include/kvm_util.h     |  33 +-
 .../testing/selftests/kvm/include/x86/processor.h  |   3 +-
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c |  28 +-
 tools/testing/selftests/kvm/lib/kvm_util.c         | 114 +++--
 tools/testing/selftests/kvm/lib/userfaultfd_util.c |   2 +-
 .../kvm/x86/dirty_log_page_splitting_test.c        |   6 +-
 .../testing/selftests/kvm/x86/nx_huge_pages_test.c |   4 +-
 tools/testing/selftests/kvm/x86/xapic_ipi_test.c   |  13 +
 9 files changed, 369 insertions(+), 355 deletions(-)