Hi Eric,
On 29/06/15 16:37, Eric Auger wrote:
> If the ITS modality is not available, let's simply support MSI
> injection by transforming the MSI.data into an SPI ID.
>
> This becomes possible to use KVM_SIGNAL_MSI ioctl for arm too.
>
> Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
> ---
> arch/arm/kvm/Kconfig | 1 +
> virt/kvm/arm/vgic.c | 5 +++++
> 2 files changed, 6 insertions(+)
>
> diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
> index 151e710..0f58baf 100644
> --- a/arch/arm/kvm/Kconfig
> +++ b/arch/arm/kvm/Kconfig
> @@ -31,6 +31,7 @@ config KVM
> select KVM_VFIO
> select HAVE_KVM_EVENTFD
> select HAVE_KVM_IRQFD
> + select HAVE_KVM_MSI
> select HAVE_KVM_IRQCHIP
> select HAVE_KVM_IRQ_ROUTING
> depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER
> diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
> index 0b4c48c..b3c10dc 100644
> --- a/virt/kvm/arm/vgic.c
> +++ b/virt/kvm/arm/vgic.c
> @@ -2314,6 +2314,11 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
> return kvm->arch.vgic.vm_ops.inject_msi(kvm, &msi);
> else
> return -ENODEV;
> + case KVM_IRQ_ROUTING_MSI:
> + if (kvm->arch.vgic.vm_ops.inject_msi)
> + return -EINVAL;
> + else
> + return kvm_vgic_inject_irq(kvm, 0, e->msi.data, level);
If you add:
static int vgic_v2m_inject_msi(struct kvm *kvm, struct kvm_msi *msi)
{
return kvm_vgic_inject_irq(kvm, 0, msi->data, 1);
}
to vgic-v2-emul.c and wire it up accordingly, you can simplify the above
kvm_set_msi, getting rid of all those extra case handling.
This also helps merging KVM_IRQ_ROUTING_MSI and the extended case.
I have hacked this up and it seems to work for me.
Cheers,
Andre.
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