[v3,00/12] KVM: arm64: selftests: Introduce arch_timer selftest

Message ID	20210901211412.4171835-1-rananta@google.com (mailing list archive)
Headers	show Return-Path: <kvm-owner@kernel.org> Date: Wed, 1 Sep 2021 21:14:00 +0000 Message-Id: <20210901211412.4171835-1-rananta@google.com> Mime-Version: 1.0 Subject: [PATCH v3 00/12] KVM: arm64: selftests: Introduce arch_timer selftest From: Raghavendra Rao Ananta <rananta@google.com> To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>, Alexandru Elisei <alexandru.elisei@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Peter Shier <pshier@google.com>, Ricardo Koller <ricarkol@google.com>, Oliver Upton <oupton@google.com>, Reiji Watanabe <reijiw@google.com>, Jing Zhang <jingzhangos@google.com>, Raghavendra Rao Anata <rananta@google.com>, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	KVM: arm64: selftests: Introduce arch_timer selftest \| expand [v3,00/12] KVM: arm64: selftests: Introduce arch_timer selftest [v3,01/12] KVM: arm64: selftests: Add MMIO readl/writel support [v3,02/12] KVM: arm64: selftests: Add write_sysreg_s and read_sysreg_s [v3,03/12] KVM: arm64: selftests: Add support for cpu_relax [v3,04/12] KVM: arm64: selftests: Add basic support for arch_timers [v3,05/12] KVM: arm64: selftests: Add basic support to generate delays [v3,06/12] KVM: arm64: selftests: Add support to disable and enable local IRQs [v3,07/12] KVM: arm64: selftests: Add support to get the vcpuid from MPIDR_EL1 [v3,08/12] KVM: arm64: selftests: Add light-weight spinlock support [v3,09/12] KVM: arm64: selftests: Add basic GICv3 support [v3,10/12] KVM: arm64: selftests: Add host support for vGIC [v3,11/12] KVM: arm64: selftests: Add arch_timer test [v3,12/12] KVM: arm64: selftests: arch_timer: Support vCPU migration

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20210901211412.4171835-1-rananta@google.com (mailing list archive)

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Date: Wed,  1 Sep 2021 21:14:00 +0000
Message-Id: <20210901211412.4171835-1-rananta@google.com>
Mime-Version: 1.0
Subject: [PATCH v3 00/12] KVM: arm64: selftests: Introduce arch_timer selftest
From: Raghavendra Rao Ananta <rananta@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>,
        James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>, Peter Shier <pshier@google.com>,
        Ricardo Koller <ricarkol@google.com>,
        Oliver Upton <oupton@google.com>,
        Reiji Watanabe <reijiw@google.com>,
        Jing Zhang <jingzhangos@google.com>,
        Raghavendra Rao Anata <rananta@google.com>,
        linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Series

KVM: arm64: selftests: Introduce arch_timer selftest | expand

Message

Raghavendra Rao Ananta Sept. 1, 2021, 9:14 p.m. UTC

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

Comments

Oliver Upton Sept. 1, 2021, 10:04 p.m. UTC | #1

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

For later submissions, can you include a lore.kernel.org link to your
older revisions of the series? NBD now, its easy to find in my inbox but
just for future reference.

--
Best,
Oliver

Oliver Upton Sept. 1, 2021, 10:05 p.m. UTC | #2

+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
>