Re: [kvm-unit-tests PATCH v2 00/10] arm/arm64: add gic framework

Alex Bennée
2016-06-04T18:45:46Z

Andrew Jones <drjones@redhat.com> writes:

> v2:
> Rebased on on latest master + my "populate argv[0]" series (will
> send a REPOST for that shortly. Additionally a few patches got
> fixes/features;
> 07/10 got same fix as kernel 7c9b973061 "irqchip/gic-v3: Configure
> all interrupts as non-secure Group-1" in order to continue
> working over TCG, as the gicv3 code for TCG removed a hack
> it had there to make Linux happy.
> 08/10 added more output for when things fail (if they fail)
> 09/10 switched gicv3 broadcast implementation to using IRM. This
> found a bug in a recent (but not tip) kernel, which I was
> about to fix, but then I saw MarcZ beat me to it.
> 10/10 actually check that the input irq is the received irq

Cool stuff. I'll get to reviewing this next week as my kvm-unit-tests
queue is getting overly long I need to clean-up and re-submit.

>
>
> Import defines, and steal enough helper functions, from Linux to
> enable programming of the gic (v2 and v3). Then use the framework
> to add an initial test (an ipi test; self, target-list, broadcast).
>
> It's my hope that this framework will be a suitable base on which
> more tests may be easily added, particularly because we have
> vgic-new and tcg gicv3 emulation getting close to merge.
>
> To run it, along with other tests, just do
>
> ./configure [ --arch=[arm|arm64] --cross-prefix=$PREFIX ]
> make
> export QEMU=$PATH_TO_QEMU
> ./run_tests.sh
>
> To run it separately do, e.g.
>
> $QEMU -machine virt,accel=tcg -cpu cortex-a57 \
> -device virtio-serial-device \
> -device virtconsole,chardev=ctd -chardev testdev,id=ctd \
> -display none -serial stdio \
> -kernel arm/gic.flat \
> -smp 123 -machine gic-version=3 -append ipi
>
> ^^ note, we can go nuts with nr-cpus on TCG :-)
>
> Or, a KVM example using a different "sender" cpu and irq (other than zero)
>
> $QEMU -machine virt,accel=kvm -cpu host \
> -device virtio-serial-device \
> -device virtconsole,chardev=ctd -chardev testdev,id=ctd \
> -display none -serial stdio \
> -kernel arm/gic.flat \
> -smp 48 -machine gic-version=3 -append 'ipi sender=42 irq=1'
>
>
> Patches:
> 01-05: fixes and functionality needed by the later gic patches
> 06-07: code theft from Linux (defines, helper functions)
> 08-10: arm/gic.flat (the base of the gic unit test), currently just IPI
>
> Available here: https://github.com/rhdrjones/kvm-unit-tests/commits/arm/gic
>
>
> Andrew Jones (10):
> lib: xstr: allow multiple args
> arm64: fix get_"sysreg32" and make MPIDR 64bit
> arm/arm64: smp: support more than 8 cpus
> arm/arm64: add some delay routines
> arm/arm64: irq enable/disable
> arm/arm64: add initial gicv2 support
> arm/arm64: add initial gicv3 support
> arm/arm64: gicv2: add an IPI test
> arm/arm64: gicv3: add an IPI test
> arm/arm64: gic: don't just use zero
>
> arm/Makefile.common | 7 +-
> arm/gic.c | 381 +++++++++++++++++++++++++++++++++++++++++++++
> arm/run | 19 ++-
> arm/selftest.c | 5 +-
> arm/unittests.cfg | 13 ++
> lib/arm/asm/arch_gicv3.h | 184 ++++++++++++++++++++++
> lib/arm/asm/gic-v2.h | 74 +++++++++
> lib/arm/asm/gic-v3.h | 321 ++++++++++++++++++++++++++++++++++++++
> lib/arm/asm/gic.h | 21 +++
> lib/arm/asm/processor.h | 38 ++++-
> lib/arm/asm/setup.h | 4 +-
> lib/arm/gic.c | 142 +++++++++++++++++
> lib/arm/processor.c | 15 ++
> lib/arm/setup.c | 12 +-
> lib/arm64/asm/arch_gicv3.h | 169 ++++++++++++++++++++
> lib/arm64/asm/gic-v2.h | 1 +
> lib/arm64/asm/gic-v3.h | 1 +
> lib/arm64/asm/gic.h | 1 +
> lib/arm64/asm/processor.h | 53 ++++++-
> lib/arm64/asm/sysreg.h | 44 ++++++
> lib/arm64/processor.c | 15 ++
> lib/libcflat.h | 4 +-
> 22 files changed, 1498 insertions(+), 26 deletions(-)
> create mode 100644 arm/gic.c
> create mode 100644 lib/arm/asm/arch_gicv3.h
> create mode 100644 lib/arm/asm/gic-v2.h
> create mode 100644 lib/arm/asm/gic-v3.h
> create mode 100644 lib/arm/asm/gic.h
> create mode 100644 lib/arm/gic.c
> create mode 100644 lib/arm64/asm/arch_gicv3.h
> create mode 100644 lib/arm64/asm/gic-v2.h
> create mode 100644 lib/arm64/asm/gic-v3.h
> create mode 100644 lib/arm64/asm/gic.h
> create mode 100644 lib/arm64/asm/sysreg.h

--
Alex Bennée