[PATCH 0/7] ARM: KVM: Support for vgic-v3

[Andrew Jones]

On Mon, Jul 18, 2016 at 11:48:12AM +0100, Vladimir Murzin wrote:
> Hi,
> 
> This is an attempt to make use vgic-v3 under arch/arm since save-restore
> functionality got re-written in C and can be shared between arm/arm64
> like it has already been done for vgic-v2 and timer.
> 
> With this patches I'm able to get 32 core ARMv7 guest boot:
> 
> ...
> GICv3: CPU31: found redistributor 703 region 0:0x000000003ffd0000
> CPU31: thread -1, cpu 3, socket 7, mpidr 80000703
> Brought up 32 CPUs
> SMP: Total of 32 processors activated (768.00 BogoMIPS).
> CPU: All CPU(s) started in SVC mode.
> ...
> 
> Additionally, quite lightweight test based on Self IPI guest test[1]
> has been run with up to 255 cpus.
> 
> [1] http://www.spinics.net/lists/kvm/msg128974.html

Would you mind also trying my arm/gic branch for kvm-unit-tests?

Patch series here
http://www.spinics.net/lists/kvm/msg135692.html

Branch here
https://github.com/rhdrjones/kvm-unit-tests/commits/arm/gic

As it uses QEMU's mach-virt machine type you'll only be able to
configure a max of 123 cpus, which can be done as follows

 export QEMU=/path/to/qemu-system-arm
 $QEMU -machine virt,accel=kvm,gic-version=3 -cpu host \
  -device virtio-serial-device \
  -device virtconsole,chardev=ctd -chardev testdev,id=ctd \
  -display none -serial stdio \
  -kernel arm/gic.flat \
  -smp 123 -append ipi

Build on an arm host with ./configure && make

Thanks,
drew

> 
> Thanks!
> 
> Vladimir Murzin (7):
>   arm64: KVM: Move GIC accessors to arch_gicv3.h
>   arm64: KVM: Move vgic-v3 save/restore to virt/kvm/arm/hyp
>   KVM: arm: vgic-new: improve compatibility with 32-bit
>   ARM: update MPIDR accessors macro
>   ARM: move system register accessors to asm/cp15.h
>   ARM: KVM: Get ready to use vgic-v3
>   ARM: KVM: Unlock vgic-v3 support
> 
>  arch/arm/include/asm/arch_gicv3.h                 |   91 +++++++++++++++++----
>  arch/arm/include/asm/cp15.h                       |   15 ++++
>  arch/arm/include/asm/cputype.h                    |    3 +-
>  arch/arm/include/asm/kvm_asm.h                    |    3 +
>  arch/arm/include/asm/kvm_host.h                   |    4 +
>  arch/arm/include/asm/kvm_hyp.h                    |   20 ++---
>  arch/arm/include/uapi/asm/kvm.h                   |    7 ++
>  arch/arm/kvm/Makefile                             |    2 +
>  arch/arm/kvm/coproc.c                             |   36 ++++++++
>  arch/arm/kvm/hyp/Makefile                         |    1 +
>  arch/arm/kvm/hyp/switch.c                         |   20 ++++-
>  arch/arm64/include/asm/arch_gicv3.h               |   13 +++
>  arch/arm64/kvm/Kconfig                            |    4 -
>  arch/arm64/kvm/hyp/Makefile                       |    2 +-
>  include/kvm/arm_vgic.h                            |    8 --
>  {arch/arm64/kvm => virt/kvm/arm}/hyp/vgic-v3-sr.c |   13 ---
>  virt/kvm/arm/vgic/vgic-kvm-device.c               |    8 --
>  virt/kvm/arm/vgic/vgic-mmio-v3.c                  |    6 +-
>  virt/kvm/arm/vgic/vgic-mmio.c                     |    2 -
>  virt/kvm/arm/vgic/vgic.h                          |   53 ------------
>  20 files changed, 186 insertions(+), 125 deletions(-)
>  rename {arch/arm64/kvm => virt/kvm/arm}/hyp/vgic-v3-sr.c (96%)
> 
> -- 
> 1.7.9.5
> 
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