[RFC PATCH 00/14] KVM: ITS hardening for pKVM

[Fuad Tabba]

> I tested the patches on Lenovo ideacenter Mini X Gen 10 Snapdragon,
> and the kernel hangs at boot for me with messags the following log:
>
> [    2.735838] ITS queue timeout (1056 1024)
> [    2.739969] ITS cmd its_build_mapd_cmd failed
> [    4.776344] ITS queue timeout (1120 1024)
> [    4.780472] ITS cmd its_build_mapti_cmd failed
> [    6.816677] ITS queue timeout (1184 1024)
> [    6.820806] ITS cmd its_build_mapti_cmd failed
> [    8.857009] ITS queue timeout (1248 1024)
> [    8.861129] ITS cmd its_build_mapti_cmd failed

I get the same running it on QEMU.

Cheers,
/fuad

> I am happy to do more debugging, let me know if I can try anything.
>
> Thanks,
> Mostafa
>
> >
> >  arch/arm64/include/asm/kvm_arm.h              |   3 +
> >  arch/arm64/include/asm/kvm_asm.h              |   1 +
> >  arch/arm64/include/asm/kvm_pkvm.h             |  20 +
> >  arch/arm64/kvm/hyp/include/nvhe/its_emulate.h |  17 +
> >  arch/arm64/kvm/hyp/include/nvhe/mem_protect.h |   2 +
> >  arch/arm64/kvm/hyp/nvhe/Makefile              |   3 +-
> >  arch/arm64/kvm/hyp/nvhe/hyp-main.c            |  14 +
> >  arch/arm64/kvm/hyp/nvhe/its_emulate.c         | 653 ++++++++++++++++++
> >  arch/arm64/kvm/hyp/nvhe/mem_protect.c         | 134 ++++
> >  arch/arm64/kvm/hyp/nvhe/setup.c               |  28 +
> >  arch/arm64/kvm/hyp/pgtable.c                  |   9 +-
> >  arch/arm64/kvm/pkvm.c                         |  60 ++
> >  drivers/irqchip/irq-gic-v3-its.c              | 177 ++++-
> >  include/linux/irqchip/arm-gic-v3.h            |  36 +
> >  14 files changed, 1126 insertions(+), 31 deletions(-)
> >  create mode 100644 arch/arm64/kvm/hyp/include/nvhe/its_emulate.h
> >  create mode 100644 arch/arm64/kvm/hyp/nvhe/its_emulate.c
> >
> > --
> > 2.53.0.473.g4a7958ca14-goog
> >