[v2,00/10] KVM: arm64: selftests: Introduce arch_timer selftest

Message

Raghavendra Rao Ananta Aug. 18, 2021, 6:43 p.m. UTC

Hello,

The patch series adds a KVM selftest to validate the behavior of
ARM's generic timer (patch-9). The test programs the timer IRQs
periodically, and for each interrupt, it validates the behaviour
against the architecture specifications. The test further provides
a command-line interface to configure the number of vCPUs, the
period of the timer, and the number of iterations that the test
has to run for.

Since the test heavily depends on interrupts, the patch series also
adds a basic support for ARM Generic Interrupt Controller v3 (GICv3)
to the KVM selftest framework (patch-8).

Furthermore, additional processor utilities such as accessing the MMIO
(via readl/writel), read/write to assembler unsupported registers,
basic delay generation, enable/disable local IRQs, and so on, are also
introduced that the test/GICv3 takes advantage of (patches 1 through 7).

The patch series, specifically the library support, is derived from the
kvm-unit-tests and the kernel itself.

Regards,
Raghavendra

v1 -> v2:

Addressed comments from Zenghui in include/aarch64/arch_timer.h:
- Correct the header description
- Remove unnecessary inclusion of linux/sizes.h
- Re-arrange CTL_ defines in ascending order
- Remove inappropriate 'return' from timer_set_* functions, which
  returns 'void'.

Raghavendra Rao Ananta (10):
  KVM: arm64: selftests: Add MMIO readl/writel support
  KVM: arm64: selftests: Add write_sysreg_s and read_sysreg_s
  KVM: arm64: selftests: Add support for cpu_relax
  KVM: arm64: selftests: Add basic support for arch_timers
  KVM: arm64: selftests: Add basic support to generate delays
  KVM: arm64: selftests: Add support to disable and enable local IRQs
  KVM: arm64: selftests: Add support to get the vcpuid from MPIDR_EL1
  KVM: arm64: selftests: Add light-weight spinlock support
  KVM: arm64: selftests: Add basic GICv3 support
  KVM: arm64: selftests: Add arch_timer test

 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   3 +-
 .../selftests/kvm/aarch64/arch_timer.c        | 382 ++++++++++++++++++
 .../kvm/include/aarch64/arch_timer.h          | 142 +++++++
 .../selftests/kvm/include/aarch64/delay.h     |  25 ++
 .../selftests/kvm/include/aarch64/gic.h       |  21 +
 .../selftests/kvm/include/aarch64/processor.h | 140 ++++++-
 .../selftests/kvm/include/aarch64/spinlock.h  |  13 +
 tools/testing/selftests/kvm/lib/aarch64/gic.c |  93 +++++
 .../selftests/kvm/lib/aarch64/gic_private.h   |  21 +
 .../selftests/kvm/lib/aarch64/gic_v3.c        | 240 +++++++++++
 .../selftests/kvm/lib/aarch64/gic_v3.h        |  70 ++++
 .../selftests/kvm/lib/aarch64/spinlock.c      |  27 ++
 13 files changed, 1176 insertions(+), 2 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/aarch64/arch_timer.c
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/arch_timer.h
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/delay.h
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/gic.h
 create mode 100644 tools/testing/selftests/kvm/include/aarch64/spinlock.h
 create mode 100644 tools/testing/selftests/kvm/lib/aarch64/gic.c
 create mode 100644 tools/testing/selftests/kvm/lib/aarch64/gic_private.h
 create mode 100644 tools/testing/selftests/kvm/lib/aarch64/gic_v3.c
 create mode 100644 tools/testing/selftests/kvm/lib/aarch64/gic_v3.h
 create mode 100644 tools/testing/selftests/kvm/lib/aarch64/spinlock.c