On 28/04/16 17:46, Andre Przywara wrote:
> From: Eric Auger <eric.auger@xxxxxxxxxx>
>
> This patch implements the switches for KVM_DEV_ARM_VGIC_GRP_DIST_REGS
> and KVM_DEV_ARM_VGIC_GRP_CPU_REGS API which allows the userspace to
> access VGIC registers.
>
> At that stage the interfaces with the MMIO API are not implemented:
> - vgic_attr_regs_access
> - vgic_v2_has_attr_regs
>
> Signed-off-by: Eric Auger <eric.auger@xxxxxxxxxx>
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
> ---
> virt/kvm/arm/vgic/vgic-kvm-device.c | 53 +++++++++++++++++++++++++++++++++++--
> virt/kvm/arm/vgic/vgic-mmio-v2.c | 34 ++++++++++++++++++++++++
> virt/kvm/arm/vgic/vgic.h | 1 +
> 3 files changed, 86 insertions(+), 2 deletions(-)
>
[...]
> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c
> index ae6077e..f2a8efe 100644
> --- a/virt/kvm/arm/vgic/vgic-mmio-v2.c
> +++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c
> @@ -276,3 +276,37 @@ int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
>
> return ret;
> }
> +
> +int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr)
> +{
> + int nr_irqs = dev->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
> + const struct vgic_register_region *regions;
> + gpa_t addr;
> + int nr_regions, i, len;
> +
> + addr = attr->attr & KVM_DEV_ARM_VGIC_OFFSET_MASK;
> +
> + switch (attr->group) {
> + case KVM_DEV_ARM_VGIC_GRP_DIST_REGS:
> + regions = vgic_v2_dist_registers;
> + nr_regions = ARRAY_SIZE(vgic_v2_dist_registers);
> + break;
> + case KVM_DEV_ARM_VGIC_GRP_CPU_REGS:
> + return -ENXIO; /* TODO: describe CPU i/f regs also */
This definitely needs addressing, as it breaks guest migration.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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