[GIT PULL] KVM: x86: Selftests changes for 6.9

[Sean Christopherson <seanjc@google.com>]

Add SEV(-ES) smoke tests, and start building out infrastructure to utilize the
"core" selftests harness and TAP.  In addition to provide TAP output, using the
infrastructure reduces boilerplate code and allows running all testscases in a
test, even if a previous testcase fails (compared with today, where a testcase
failure is terminal for the entire test).

As noted in the PMU pull request, the "Use TAP interface" changes have a few
conflicts.  3 of 4 are relatively straightforward, but the one in
userspace_msr_exit_test.c's test_msr_filter_allow() is a pain.  At least, I
thought so as I botched it at least twice.  (LOL, make that three times, as I
just botched my test merge resolution).

The code should end up looking like this:

---
KVM_ONE_VCPU_TEST_SUITE(user_msr);

KVM_ONE_VCPU_TEST(user_msr, msr_filter_allow, guest_code_filter_allow)
{
	struct kvm_vm *vm = vcpu->vm;
	uint64_t cmd;
	int rc;

	sync_global_to_guest(vm, fep_available);

	rc = kvm_check_cap(KVM_CAP_X86_USER_SPACE_MSR);
---

The resolutions I've been using can be found in kvm-x86/next.


The following changes since commit db7d6fbc10447090bab8691a907a7c383ec66f58:

  KVM: remove unnecessary #ifdef (2024-02-08 08:41:06 -0500)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-selftests-6.9

for you to fetch changes up to e9da6f08edb0bd4c621165496778d77a222e1174:

  KVM: selftests: Explicitly close guest_memfd files in some gmem tests (2024-03-05 13:31:20 -0800)

----------------------------------------------------------------
KVM selftests changes for 6.9:

 - Add macros to reduce the amount of boilerplate code needed to write "simple"
   selftests, and to utilize selftest TAP infrastructure, which is especially
   beneficial for KVM selftests with multiple testcases.

 - Add basic smoke tests for SEV and SEV-ES, along with a pile of library
   support for handling private/encrypted/protected memory.

 - Fix benign bugs where tests neglect to close() guest_memfd files.

----------------------------------------------------------------
Ackerley Tng (1):
      KVM: selftests: Add a macro to iterate over a sparsebit range

Dongli Zhang (1):
      KVM: selftests: Explicitly close guest_memfd files in some gmem tests

Michael Roth (2):
      KVM: selftests: Make sparsebit structs const where appropriate
      KVM: selftests: Add support for protected vm_vaddr_* allocations

Peter Gonda (5):
      KVM: selftests: Add support for allocating/managing protected guest memory
      KVM: selftests: Explicitly ucall pool from shared memory
      KVM: selftests: Allow tagging protected memory in guest page tables
      KVM: selftests: Add library for creating and interacting with SEV guests
      KVM: selftests: Add a basic SEV smoke test

Sean Christopherson (4):
      KVM: selftests: Move setting a vCPU's entry point to a dedicated API
      KVM: selftests: Extend VM creation's @shape to allow control of VM subtype
      KVM: selftests: Use the SEV library APIs in the intra-host migration test
      KVM: selftests: Add a basic SEV-ES smoke test

Thomas Huth (7):
      KVM: selftests: x86: sync_regs_test: Use vcpu_run() where appropriate
      KVM: selftests: x86: sync_regs_test: Get regs structure before modifying it
      KVM: selftests: Add a macro to define a test with one vcpu
      KVM: selftests: x86: Use TAP interface in the sync_regs test
      KVM: selftests: x86: Use TAP interface in the fix_hypercall test
      KVM: selftests: x86: Use TAP interface in the vmx_pmu_caps test
      KVM: selftests: x86: Use TAP interface in the userspace_msr_exit test

 tools/testing/selftests/kvm/Makefile               |   2 +
 tools/testing/selftests/kvm/guest_memfd_test.c     |   3 +
 .../selftests/kvm/include/aarch64/kvm_util_arch.h  |   7 ++
 .../selftests/kvm/include/kvm_test_harness.h       |  36 ++++++
 .../testing/selftests/kvm/include/kvm_util_base.h  |  61 +++++++++--
 .../selftests/kvm/include/riscv/kvm_util_arch.h    |   7 ++
 .../selftests/kvm/include/s390x/kvm_util_arch.h    |   7 ++
 tools/testing/selftests/kvm/include/sparsebit.h    |  56 +++++++---
 .../selftests/kvm/include/x86_64/kvm_util_arch.h   |  23 ++++
 .../selftests/kvm/include/x86_64/processor.h       |   8 ++
 tools/testing/selftests/kvm/include/x86_64/sev.h   | 107 ++++++++++++++++++
 .../testing/selftests/kvm/lib/aarch64/processor.c  |  24 +++-
 tools/testing/selftests/kvm/lib/kvm_util.c         |  67 ++++++++++--
 tools/testing/selftests/kvm/lib/riscv/processor.c  |   9 +-
 tools/testing/selftests/kvm/lib/s390x/processor.c  |  13 ++-
 tools/testing/selftests/kvm/lib/sparsebit.c        |  48 ++++----
 tools/testing/selftests/kvm/lib/ucall_common.c     |   3 +-
 tools/testing/selftests/kvm/lib/x86_64/processor.c |  45 +++++++-
 tools/testing/selftests/kvm/lib/x86_64/sev.c       | 114 +++++++++++++++++++
 .../selftests/kvm/x86_64/fix_hypercall_test.c      |  27 +++--
 .../kvm/x86_64/private_mem_conversions_test.c      |   2 +
 .../selftests/kvm/x86_64/sev_migrate_tests.c       |  60 +++-------
 .../testing/selftests/kvm/x86_64/sev_smoke_test.c  |  88 +++++++++++++++
 .../testing/selftests/kvm/x86_64/sync_regs_test.c  | 121 +++++++++++++++------
 .../selftests/kvm/x86_64/userspace_msr_exit_test.c |  52 +++------
 .../selftests/kvm/x86_64/vmx_pmu_caps_test.c       |  52 ++-------
 26 files changed, 802 insertions(+), 240 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/kvm_util_arch.h
 create mode 100644 tools/testing/selftests/kvm/include/kvm_test_harness.h
 create mode 100644 tools/testing/selftests/kvm/include/riscv/kvm_util_arch.h
 create mode 100644 tools/testing/selftests/kvm/include/s390x/kvm_util_arch.h
 create mode 100644 tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h
 create mode 100644 tools/testing/selftests/kvm/include/x86_64/sev.h
 create mode 100644 tools/testing/selftests/kvm/lib/x86_64/sev.c
 create mode 100644 tools/testing/selftests/kvm/x86_64/sev_smoke_test.c