+cc Andrew Jones
On Wed, Sep 01, 2021 at 09:14:00PM +0000, Raghavendra Rao Ananta wrote:
> Hello,
>
> The patch series adds a KVM selftest to validate the behavior of
> ARM's generic timer (patch-11). 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.
>
> Patch-12 adds an option to randomly migrate the vCPUs to different
> physical CPUs across the system. The bug for the fix provided by
> Marc with commit 3134cc8beb69d0d ("KVM: arm64: vgic: Resample HW
> pending state on deactivation") was discovered using arch_timer
> test with vCPU migrations.
>
> Since the test heavily depends on interrupts, patch-10 adds a host
> library to setup ARM Generic Interrupt Controller v3 (GICv3). This
> includes creating a vGIC device, setting up distributor and
> redistributor attributes, and mapping the guest physical addresses.
> Symmetrical to this, patch-9 adds a guest library to talk to the vGIC,
> which includes initializing the controller, enabling/disabling the
> interrupts, and so on.
>
> 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 8).
>
> The patch series, specifically the library support, is derived from the
> kvm-unit-tests and the kernel itself.
>
> Regards,
> Raghavendra
>
> v2 -> v3:
>
> - Addressed the comments from Ricardo regarding moving the vGIC host
> support for selftests to its own library.
> - Added an option (-m) to migrate the guest vCPUs to physical CPUs
> in the system.
>
> 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 (12):
> 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 host support for vGIC
> KVM: arm64: selftests: Add arch_timer test
> KVM: arm64: selftests: arch_timer: Support vCPU migration
>
> tools/testing/selftests/kvm/.gitignore | 1 +
> tools/testing/selftests/kvm/Makefile | 3 +-
> .../selftests/kvm/aarch64/arch_timer.c | 457 ++++++++++++++++++
> .../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 +
> .../selftests/kvm/include/aarch64/vgic.h | 14 +
> 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 ++
> .../testing/selftests/kvm/lib/aarch64/vgic.c | 67 +++
> 15 files changed, 1332 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/include/aarch64/vgic.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
> create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vgic.c
>
> --
> 2.33.0.153.gba50c8fa24-goog
>
