From: Raghavendra Rao Ananta <rananta@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
Marc Zyngier <maz@kernel.org>, Andrew Jones <drjones@redhat.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: kvm@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com>,
Peter Shier <pshier@google.com>,
linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 00/18] KVM: arm64: selftests: Introduce arch_timer selftest
Date: Thu, 9 Sep 2021 01:38:00 +0000 [thread overview]
Message-ID: <20210909013818.1191270-1-rananta@google.com> (raw)
Hello,
The patch series adds a KVM selftest to validate the behavior of
ARM's generic timer (patch-15). 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-16 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-14 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-11 adds a guest library to talk to the vGIC,
which includes initializing the controller, enabling/disabling the
interrupts, and so on.
The following patches are utility patches that the above ones make use
of:
Patch-1 adds readl/writel support for guests to access MMIO space.
Patch-2 imports arch/arm64/include/asm/sysreg.h into selftests to make
use of the register encodings and read/write definitions.
Patch-3 is not directly related to the test, but makes
aarch64/debug-exceptions.c use the read/write definitions from the
imported sysreg.h and remove the existing definitions of read_sysreg()
and write_sysreg().
Patch-4 introduces ARM64_SYS_KVM_REG, that helps convert the SYS_*
register encodings in sysreg.h to be acceptable by get_reg() and set_reg().
Patch-5 adds the support for cpu_relax().
Patch-6 adds basic arch_timer framework.
Patch-7 adds udelay() support for the guests to utilize.
Patch-8 adds local_irq_enable() and local_irq_disable() for the guests
to enable/disable interrupts.
Patch-9 adds the support to get the vcpuid for the guests. This allows
them to access any cpu-centric private data in the upcoming patches.
Patch-10 adds a light-weight support for spinlocks for the guests to
use.
Patch-12 and 13 adds helper routines to get the number of vCPUs and the
mode of the VM, respectively. These are further used by the vGIC host
routine (patch-14).
Patch-17 is unrelated to the test case, but it make a cleanup
for aarch64/vgic_init.c to use REDIST_REGION_ATTR_ADDR from vgic.h.
Patch-18 is also unrelated, where it replaces ARM64_SYS_REG with
ARM64_SYS_KVM_REG throughout the selftests. The definitions for the
system register encodings are further deleted in processor.h.
The patch series, specifically the library support, is derived from the
kvm-unit-tests and the kernel itself.
Regards,
Raghavendra
v3 -> v4:
Addressed the comments by Andrew, Oliver, and Ricardo (Thank you):
- Reimplemented get_vcpuid() by exporting a map of vcpuid:mpidr to the
guest.
- Import sysreg.h from arch/arm64/include/asm/sysreg.h to get the system
register encodings and its read/write support. As a result, delete the
existing definitions in processor.h.
- Introduce ARM64_SYS_KVM_REG that converts SYS_* register definitions
from sysreg.h into the encodings accepted by get_reg() and set_reg().
- Hence, remove the existing encodings of system registers (CPACR_EL1,
TCR_EL1, and friends) and replace all the its consumers throughout
the selftests with ARM64_SYS_KVM_REG.
- Keep track of number of vCPUs in 'struct kvm_vm'.
- Add a helper method to get the KVM VM's mode.
- Modify the vGIC host function vgic_v3_setup to make use of the above
two helper methods, which prevents it from accepting nr_vcpus as
an argument.
- Move the definition of REDIST_REGION_ATTR_ADDR from lib/aarch64/vgic.c
to include/aarch64/vgic.h.
- Make the selftest, vgic_init.c, use the definition of REDIST_REGION_ATTR_ADDR
from include/aarch64/vgic.h.
- Turn ON vCPU migration by default (-m 2).
- Add pr_debug() to log vCPU migrations. Helpful for diagnosis.
- Change TEST_ASSERT(false,...) to TEST_FAIL() in the base arch_timer
test.
- Include linux/types.h for __force definitions.
- Change the type of 'val' to 'int' in spin_lock() to match the lock
value type.
- Fix typos in code files and comments.
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'.
v1: https://lore.kernel.org/kvmarm/20210813211211.2983293-1-rananta@google.com/
v2: https://lore.kernel.org/kvmarm/20210818184311.517295-1-rananta@google.com/
v3: https://lore.kernel.org/kvmarm/20210901211412.4171835-1-rananta@google.com/
Raghavendra Rao Ananta (18):
KVM: arm64: selftests: Add MMIO readl/writel support
KVM: arm64: selftests: Add sysreg.h
KVM: arm64: selftests: Use read/write definitions from sysreg.h
KVM: arm64: selftests: Introduce ARM64_SYS_KVM_REG
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 guest support to get the vcpuid
KVM: arm64: selftests: Add light-weight spinlock support
KVM: arm64: selftests: Add basic GICv3 support
KVM: selftests: Keep track of the number of vCPUs for a VM
KVM: selftests: Add support to get the VM's mode
KVM: arm64: selftests: Add host support for vGIC
KVM: arm64: selftests: Add arch_timer test
KVM: arm64: selftests: arch_timer: Support vCPU migration
KVM: arm64: selftests: Replace ARM64_SYS_REG with ARM64_SYS_KVM_REG
KVM: selftests: vgic_init: Pull REDIST_REGION_ATTR_ADDR from vgic.h
tools/testing/selftests/kvm/.gitignore | 1 +
tools/testing/selftests/kvm/Makefile | 3 +-
.../selftests/kvm/aarch64/arch_timer.c | 462 ++++++
.../selftests/kvm/aarch64/debug-exceptions.c | 30 +-
.../selftests/kvm/aarch64/psci_cpu_on_test.c | 3 +-
.../testing/selftests/kvm/aarch64/vgic_init.c | 3 +-
.../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 | 93 +-
.../selftests/kvm/include/aarch64/spinlock.h | 13 +
.../selftests/kvm/include/aarch64/sysreg.h | 1278 +++++++++++++++++
.../selftests/kvm/include/aarch64/vgic.h | 20 +
.../testing/selftests/kvm/include/kvm_util.h | 2 +
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/processor.c | 62 +-
.../selftests/kvm/lib/aarch64/spinlock.c | 27 +
.../testing/selftests/kvm/lib/aarch64/vgic.c | 60 +
tools/testing/selftests/kvm/lib/kvm_util.c | 12 +
.../selftests/kvm/lib/kvm_util_internal.h | 1 +
23 files changed, 2636 insertions(+), 46 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/sysreg.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
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next reply other threads:[~2021-09-09 1:38 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 1:38 Raghavendra Rao Ananta [this message]
2021-09-09 1:38 ` [PATCH v4 01/18] KVM: arm64: selftests: Add MMIO readl/writel support Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 02/18] KVM: arm64: selftests: Add sysreg.h Raghavendra Rao Ananta
2021-09-09 2:47 ` Oliver Upton
2021-09-09 6:53 ` Andrew Jones
2021-09-09 16:42 ` Raghavendra Rao Ananta
2021-09-09 17:17 ` Mark Brown
2021-09-09 20:06 ` Raghavendra Rao Ananta
2021-09-10 8:30 ` Mark Brown
2021-09-13 23:38 ` Raghavendra Rao Ananta
2021-09-14 10:39 ` Mark Brown
2021-09-09 1:38 ` [PATCH v4 03/18] KVM: arm64: selftests: Use read/write definitions from sysreg.h Raghavendra Rao Ananta
2021-09-09 2:55 ` Oliver Upton
2021-09-09 6:56 ` Andrew Jones
2021-09-09 16:43 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 04/18] KVM: arm64: selftests: Introduce ARM64_SYS_KVM_REG Raghavendra Rao Ananta
2021-09-09 3:02 ` Oliver Upton
2021-09-09 16:48 ` Raghavendra Rao Ananta
2021-09-09 7:04 ` Andrew Jones
2021-09-09 16:49 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 05/18] KVM: arm64: selftests: Add support for cpu_relax Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 06/18] KVM: arm64: selftests: Add basic support for arch_timers Raghavendra Rao Ananta
2021-09-09 7:07 ` Andrew Jones
2021-09-09 1:38 ` [PATCH v4 07/18] KVM: arm64: selftests: Add basic support to generate delays Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 08/18] KVM: arm64: selftests: Add support to disable and enable local IRQs Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 09/18] KVM: arm64: selftests: Add guest support to get the vcpuid Raghavendra Rao Ananta
2021-09-09 5:09 ` Oliver Upton
2021-09-09 16:59 ` Raghavendra Rao Ananta
2021-09-09 17:04 ` Oliver Upton
2021-09-09 7:56 ` Andrew Jones
2021-09-09 17:10 ` Raghavendra Rao Ananta
2021-09-10 8:10 ` Andrew Jones
2021-09-10 18:03 ` Raghavendra Rao Ananta
2021-09-13 7:25 ` Andrew Jones
2021-09-12 7:05 ` Reiji Watanabe
2021-09-13 7:35 ` Andrew Jones
2021-09-13 16:51 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 10/18] KVM: arm64: selftests: Add light-weight spinlock support Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 11/18] KVM: arm64: selftests: Add basic GICv3 support Raghavendra Rao Ananta
2021-09-09 5:18 ` Oliver Upton
2021-09-09 16:38 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 12/18] KVM: selftests: Keep track of the number of vCPUs for a VM Raghavendra Rao Ananta
2021-09-09 5:22 ` Oliver Upton
2021-09-09 13:20 ` Andrew Jones
2021-09-09 1:38 ` [PATCH v4 13/18] KVM: selftests: Add support to get the VM's mode Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 14/18] KVM: arm64: selftests: Add host support for vGIC Raghavendra Rao Ananta
2021-09-09 5:32 ` Oliver Upton
2021-09-09 13:34 ` Andrew Jones
2021-09-09 17:25 ` Raghavendra Rao Ananta
2021-09-09 17:20 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 15/18] KVM: arm64: selftests: Add arch_timer test Raghavendra Rao Ananta
2021-09-09 5:51 ` Oliver Upton
2021-09-09 18:03 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 16/18] KVM: arm64: selftests: arch_timer: Support vCPU migration Raghavendra Rao Ananta
2021-09-09 13:45 ` Andrew Jones
2021-09-09 17:33 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 17/18] KVM: arm64: selftests: Replace ARM64_SYS_REG with ARM64_SYS_KVM_REG Raghavendra Rao Ananta
2021-09-09 5:34 ` Oliver Upton
2021-09-09 13:38 ` Andrew Jones
2021-09-09 17:29 ` Raghavendra Rao Ananta
2021-09-09 1:38 ` [PATCH v4 18/18] KVM: selftests: vgic_init: Pull REDIST_REGION_ATTR_ADDR from vgic.h Raghavendra Rao Ananta
2021-09-09 5:36 ` Oliver Upton
2021-09-09 16:41 ` Raghavendra Rao Ananta
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