[GIT,PULL] KVM: Selftests "tree"-wide changes for 6.10

Pull-request

https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests_utils-6.10

Message

Sean Christopherson May 10, 2024, 11:50 p.m. UTC

Selftests pull request 2 of 2.  I put these changes into a separate branch so
that other arch maintainers had a stable target to build on, though AFAIK there
are no branches that depend on this, nor that conflict with this.

The most annoying change is to revert kvm_util_base.h back to kvm_util.h.  The
_entire_ reason for the layer of inclusion indirection was to avoid a handful
of explicit ucall_common.h #includes.  /facepalm

The other wide-sweeping change is to define _GNU_SOURCE in the Makefile, mostly
in response to an annoying warning that was introduced late in 6.9 due
kselftest_harness.h using a _GNU_SOURCE-only function, but not guaranteeing
that _GNU_SOURCE was defined before stdio.h was first included (I think that
was the offending #include).

Long story short, it was/is a bit of a mess, and there will likely be a true
tree-wide tools series/patch coming along early in 6.10 to essentially give all
of tools the same treatment, i.e. define _GNU_SOURCE for everything.  We
shouldn't *need* to do anything, though if/when that lands, we may need to
remove the definition from KVM selftests' Makefile (like I said, it's a mess).

The following changes since commit a96cb3bf390eebfead5fc7a2092f8452a7997d1b:

  Merge x86 bugfixes from Linux 6.9-rc3 (2024-04-19 09:02:22 -0400)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests_utils-6.10

for you to fetch changes up to b093f87fd1957cdfbe518d5bb2caa39ba80c1669:

  KVM: selftests: Drop @selector from segment helpers (2024-04-29 12:55:22 -0700)

----------------------------------------------------------------
KVM selftests treewide updates for 6.10:

 - Define _GNU_SOURCE for all selftests to fix a warning that was introduced by
   a change to kselftest_harness.h late in the 6.9 cycle, and because forcing
   every test to #define _GNU_SOURCE is painful.

 - Provide a global psuedo-RNG instance for all tests, so that library code can
   generate random, but determinstic numbers.

 - Use the global pRNG to randomly force emulation of select writes from guest
   code on x86, e.g. to help validate KVM's emulation of locked accesses.

 - Rename kvm_util_base.h back to kvm_util.h, as the weird layer of indirection
   was added purely to avoid manually #including ucall_common.h in a handful of
   locations.

 - Allocate and initialize x86's GDT, IDT, TSS, segments, and default exception
   handlers at VM creation, instead of forcing tests to manually trigger the
   related setup.

----------------------------------------------------------------
Ackerley Tng (1):
      KVM: selftests: Fix off-by-one initialization of GDT limit

Sean Christopherson (23):
      KVM: selftests: Define _GNU_SOURCE for all selftests code
      KVM: selftests: Provide a global pseudo-RNG instance for all tests
      KVM: selftests: Provide an API for getting a random bool from an RNG
      KVM: selftests: Add global snapshot of kvm_is_forced_emulation_enabled()
      KVM: selftests: Add vcpu_arch_put_guest() to do writes from guest code
      KVM: selftests: Randomly force emulation on x86 writes from guest code
      Revert "kvm: selftests: move base kvm_util.h declarations to kvm_util_base.h"
      KVM: sefltests: Add kvm_util_types.h to hold common types, e.g. vm_vaddr_t
      KVM: selftests: Move GDT, IDT, and TSS fields to x86's kvm_vm_arch
      KVM: selftests: Move platform_info_test's main assert into guest code
      KVM: selftests: Rework platform_info_test to actually verify #GP
      KVM: selftests: Explicitly clobber the IDT in the "delete memslot" testcase
      KVM: selftests: Move x86's descriptor table helpers "up" in processor.c
      KVM: selftests: Rename x86's vcpu_setup() to vcpu_init_sregs()
      KVM: selftests: Init IDT and exception handlers for all VMs/vCPUs on x86
      KVM: selftests: Map x86's exception_handlers at VM creation, not vCPU setup
      KVM: selftests: Allocate x86's GDT during VM creation
      KVM: selftests: Drop superfluous switch() on vm->mode in vcpu_init_sregs()
      KVM: selftests: Fold x86's descriptor tables helpers into vcpu_init_sregs()
      KVM: selftests: Allocate x86's TSS at VM creation
      KVM: selftests: Add macro for TSS selector, rename up code/data macros
      KVM: selftests: Init x86's segments during VM creation
      KVM: selftests: Drop @selector from segment helpers

 tools/testing/selftests/kvm/Makefile               |    4 +-
 tools/testing/selftests/kvm/aarch64/arch_timer.c   |    3 +-
 .../selftests/kvm/aarch64/page_fault_test.c        |    1 -
 tools/testing/selftests/kvm/aarch64/psci_test.c    |    3 -
 tools/testing/selftests/kvm/aarch64/vgic_init.c    |    1 -
 tools/testing/selftests/kvm/arch_timer.c           |    4 +-
 tools/testing/selftests/kvm/demand_paging_test.c   |    4 +-
 tools/testing/selftests/kvm/dirty_log_perf_test.c  |   10 +-
 tools/testing/selftests/kvm/dirty_log_test.c       |   26 +-
 tools/testing/selftests/kvm/guest_memfd_test.c     |    4 +-
 tools/testing/selftests/kvm/guest_print_test.c     |    1 +
 .../testing/selftests/kvm/hardware_disable_test.c  |    3 -
 .../selftests/kvm/include/aarch64/processor.h      |    2 +
 .../testing/selftests/kvm/include/aarch64/ucall.h  |    2 +-
 tools/testing/selftests/kvm/include/kvm_util.h     | 1111 +++++++++++++++++++-
 .../testing/selftests/kvm/include/kvm_util_base.h  |   15 +-
 .../testing/selftests/kvm/include/kvm_util_types.h |   20 +
 tools/testing/selftests/kvm/include/memstress.h    |    1 -
 tools/testing/selftests/kvm/include/s390x/ucall.h  |    2 +-
 tools/testing/selftests/kvm/include/test_util.h    |   19 +
 .../selftests/kvm/include/userfaultfd_util.h       |    3 -
 .../selftests/kvm/include/x86_64/kvm_util_arch.h   |   28 +
 .../selftests/kvm/include/x86_64/processor.h       |    5 +-
 tools/testing/selftests/kvm/include/x86_64/ucall.h |    2 +-
 .../testing/selftests/kvm/kvm_binary_stats_test.c  |    2 -
 tools/testing/selftests/kvm/kvm_create_max_vcpus.c |    2 -
 tools/testing/selftests/kvm/kvm_page_table_test.c  |    4 +-
 .../testing/selftests/kvm/lib/aarch64/processor.c  |    2 +
 tools/testing/selftests/kvm/lib/assert.c           |    3 -
 tools/testing/selftests/kvm/lib/kvm_util.c         |   12 +-
 tools/testing/selftests/kvm/lib/memstress.c        |   13 +-
 tools/testing/selftests/kvm/lib/riscv/processor.c  |    1 +
 tools/testing/selftests/kvm/lib/test_util.c        |    2 -
 tools/testing/selftests/kvm/lib/ucall_common.c     |    5 +-
 tools/testing/selftests/kvm/lib/userfaultfd_util.c |    3 -
 tools/testing/selftests/kvm/lib/x86_64/processor.c |  308 +++---
 tools/testing/selftests/kvm/lib/x86_64/sev.c       |    1 -
 .../testing/selftests/kvm/max_guest_memory_test.c  |    2 -
 .../kvm/memslot_modification_stress_test.c         |    3 -
 tools/testing/selftests/kvm/riscv/arch_timer.c     |    4 +-
 tools/testing/selftests/kvm/rseq_test.c            |   13 +-
 tools/testing/selftests/kvm/s390x/cmma_test.c      |    3 +-
 tools/testing/selftests/kvm/s390x/memop.c          |    1 +
 tools/testing/selftests/kvm/s390x/sync_regs_test.c |    2 -
 tools/testing/selftests/kvm/s390x/tprot.c          |    1 +
 .../testing/selftests/kvm/set_memory_region_test.c |   13 +-
 tools/testing/selftests/kvm/steal_time.c           |    2 +-
 tools/testing/selftests/kvm/x86_64/amx_test.c      |    4 -
 .../kvm/x86_64/dirty_log_page_splitting_test.c     |    1 +
 .../kvm/x86_64/exit_on_emulation_failure_test.c    |    5 +-
 .../selftests/kvm/x86_64/fix_hypercall_test.c      |    2 -
 tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c |    2 -
 tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c  |    2 -
 tools/testing/selftests/kvm/x86_64/hyperv_evmcs.c  |    3 -
 .../testing/selftests/kvm/x86_64/hyperv_features.c |    6 -
 tools/testing/selftests/kvm/x86_64/hyperv_ipi.c    |    5 -
 .../testing/selftests/kvm/x86_64/hyperv_svm_test.c |    1 -
 .../selftests/kvm/x86_64/hyperv_tlb_flush.c        |    2 -
 tools/testing/selftests/kvm/x86_64/kvm_pv_test.c   |    3 -
 .../selftests/kvm/x86_64/monitor_mwait_test.c      |    3 -
 .../selftests/kvm/x86_64/nested_exceptions_test.c  |    2 -
 .../selftests/kvm/x86_64/nx_huge_pages_test.c      |    3 -
 .../selftests/kvm/x86_64/platform_info_test.c      |   61 +-
 .../selftests/kvm/x86_64/pmu_counters_test.c       |    8 -
 .../selftests/kvm/x86_64/pmu_event_filter_test.c   |    9 -
 .../kvm/x86_64/private_mem_conversions_test.c      |    1 -
 .../testing/selftests/kvm/x86_64/set_boot_cpu_id.c |    1 -
 .../testing/selftests/kvm/x86_64/set_sregs_test.c  |    1 -
 .../kvm/x86_64/smaller_maxphyaddr_emulation_test.c |    6 -
 tools/testing/selftests/kvm/x86_64/smm_test.c      |    1 -
 tools/testing/selftests/kvm/x86_64/state_test.c    |    1 -
 .../selftests/kvm/x86_64/svm_int_ctl_test.c        |    3 -
 .../kvm/x86_64/svm_nested_shutdown_test.c          |    5 +-
 .../kvm/x86_64/svm_nested_soft_inject_test.c       |    5 +-
 .../testing/selftests/kvm/x86_64/sync_regs_test.c  |    2 -
 .../selftests/kvm/x86_64/ucna_injection_test.c     |    7 -
 .../selftests/kvm/x86_64/userspace_msr_exit_test.c |   15 +-
 .../selftests/kvm/x86_64/vmx_dirty_log_test.c      |    3 -
 .../vmx_exception_with_invalid_guest_state.c       |    3 -
 .../selftests/kvm/x86_64/vmx_pmu_caps_test.c       |    4 -
 .../kvm/x86_64/vmx_preemption_timer_test.c         |    1 -
 .../testing/selftests/kvm/x86_64/xapic_ipi_test.c  |    4 -
 .../selftests/kvm/x86_64/xapic_state_test.c        |    1 -
 .../testing/selftests/kvm/x86_64/xcr0_cpuid_test.c |    3 -
 .../testing/selftests/kvm/x86_64/xen_shinfo_test.c |    7 +-
 tools/testing/selftests/kvm/x86_64/xss_msr_test.c  |    2 -
 86 files changed, 1423 insertions(+), 451 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/kvm_util_types.h