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[34.68.225.194]) by smtp.gmail.com with ESMTPSA id h9sm518789ioz.30.2021.09.01.15.05.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Sep 2021 15:05:09 -0700 (PDT) Date: Wed, 1 Sep 2021 22:05:06 +0000 From: Oliver Upton To: Raghavendra Rao Ananta Cc: Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Peter Shier , Ricardo Koller , Reiji Watanabe , Jing Zhang , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, drjones@redhat.com Subject: Re: [PATCH v3 00/12] KVM: arm64: selftests: Introduce arch_timer selftest Message-ID: References: <20210901211412.4171835-1-rananta@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210901211412.4171835-1-rananta@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org +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 >