[PATCH 00/16] KVM: arm64: selftests: Tests for protected VMs

[Fuad Tabba <fuad.tabba@linux.dev>]

Hi folks,

This series adds selftests for protected VMs. A test skips on a host
without pKVM, and so does any case where the host doesn't have the
required feature, e.g., PtrAuth, SVE or hugetlb pages.

A couple of points:

- Each area gets its own test rather than cases folded into existing
  tests such as psci_test, hypercalls, set_id_regs, etc. A protected
  guest requires its own boot path, and has to share the ucall pool
  before its first ucall. On top of that, a protected guest gets the
  opposite result for many of those tests' checks.

- pkvm_exceptions skips its breakpoint, watchpoint and single-step cases
  while a protected guest's ID_AA64DFR0_EL1.DebugVer is 0. pkvm_id_regs
  reads the same field to choose between the hidden and the exposed
  debug view. With the patch that adds self-hosted debug to protected
  guests [1], both tests run the debug cases with no change.

The series is structured as follows:

  01:     external_aborts: an abort injected before a vCPU's first run.
  02-04:  Generic selftest changes: creating a protected VM, the pKVM
          function IDs and the ucall pool's address.
  05-06:  Protected-VM library: boot trampoline and helpers.
  07-16:  The tests, one per area.

Based on Linux 7.4-rc1 (6628e7d4c6b25).

Cheers,
/fuad

[1] https://lore.kernel.org/all/20261102093950.2922035-1-fuad.tabba@linux.dev/

Fuad Tabba (16):
  KVM: arm64: selftests: Inject an abort before a vCPU's first run
  KVM: selftests: Allow arm64 tests to create protected VMs
  tools: arm-smccc: Add the pKVM memory sharing function IDs
  KVM: selftests: Export the ucall pool's guest physical address
  KVM: arm64: selftests: Add protected-VM boot trampoline
  KVM: arm64: selftests: Add protected-VM library helpers
  KVM: arm64: selftests: Add pkvm_host_abi host-interface test
  KVM: arm64: selftests: Add pkvm_psci multi-vCPU PSCI test
  KVM: arm64: selftests: Add pkvm_mem_share hypercall test
  KVM: arm64: selftests: Add pkvm_smccc hypercall test
  KVM: arm64: selftests: Add pkvm_id_regs register and trap test
  KVM: arm64: selftests: Add pkvm_vcpu_regs register-state test
  KVM: arm64: selftests: Add pkvm_irq interrupt test
  KVM: arm64: selftests: Add pkvm_isolation host-access test
  KVM: arm64: selftests: Add pkvm_lifecycle teardown test
  KVM: arm64: selftests: Add pkvm_exceptions debug and SError test

 tools/include/linux/arm-smccc.h               |  22 +
 tools/testing/selftests/kvm/Makefile.kvm      |  12 +
 .../selftests/kvm/arm64/external_aborts.c     |  21 +
 .../selftests/kvm/arm64/pkvm_exceptions.c     | 261 ++++++++
 .../selftests/kvm/arm64/pkvm_host_abi.c       | 428 ++++++++++++
 .../selftests/kvm/arm64/pkvm_id_regs.c        | 306 +++++++++
 tools/testing/selftests/kvm/arm64/pkvm_irq.c  | 268 ++++++++
 .../selftests/kvm/arm64/pkvm_isolation.c      | 225 +++++++
 .../selftests/kvm/arm64/pkvm_lifecycle.c      | 110 +++
 .../selftests/kvm/arm64/pkvm_mem_share.c      | 394 +++++++++++
 tools/testing/selftests/kvm/arm64/pkvm_psci.c | 632 ++++++++++++++++++
 .../testing/selftests/kvm/arm64/pkvm_smccc.c  | 117 ++++
 .../selftests/kvm/arm64/pkvm_vcpu_regs.c      | 221 ++++++
 .../selftests/kvm/include/arm64/pkvm.h        |  74 ++
 .../selftests/kvm/include/ucall_common.h      |   1 +
 tools/testing/selftests/kvm/lib/arm64/pkvm.c  | 245 +++++++
 .../selftests/kvm/lib/arm64/pvm-entry.S       |  58 ++
 tools/testing/selftests/kvm/lib/kvm_util.c    |   5 +-
 .../testing/selftests/kvm/lib/ucall_common.c  |   9 +-
 19 files changed, 3406 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_exceptions.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_host_abi.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_id_regs.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_irq.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_isolation.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_lifecycle.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_mem_share.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_psci.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_smccc.c
 create mode 100644 tools/testing/selftests/kvm/arm64/pkvm_vcpu_regs.c
 create mode 100644 tools/testing/selftests/kvm/include/arm64/pkvm.h
 create mode 100644 tools/testing/selftests/kvm/lib/arm64/pkvm.c
 create mode 100644 tools/testing/selftests/kvm/lib/arm64/pvm-entry.S


base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.47.3