# Re: \[PATCH 03/10\] KVM: PPC: reserve a capability and ioctl numbers for realmode VFIO

- From: Alexander Graf \<hidden\>
- Date: 2013-08-15 07:16:30 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2013/08/4101308
- Thread: https://ratatoskr.run/linuxppc-dev/2013/08/4092946/t.md

```text

On 01.08.2013, at 06:44, Alexey Kardashevskiy wrote:

> This is to reserve a capablity number for upcoming support
> of VFIO-IOMMU DMA operations in real mode.
>=20
> Signed-off-by: Alexey Kardashevskiy <redacted>
>=20
> ---
> Changes:
> 2013/07/16:
> * changed the number
>=20
> 2013/07/11:
> * changed order in a file, added comment about a gap in ioctl number
>=20
> Signed-off-by: Alexey Kardashevskiy <redacted>
> ---
> include/uapi/linux/kvm.h | 4 ++++
> 1 file changed, 4 insertions(+)
>=20
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 99c2533..53c3f1f 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -668,6 +668,7 @@ struct kvm_ppc_smmu_info {
> #define KVM_CAP_IRQ_XICS 92
> #define KVM_CAP_ARM_EL1_32BIT 93
> #define KVM_CAP_SPAPR_MULTITCE 94
> +#define KVM_CAP_SPAPR_TCE_IOMMU 95
>=20
> #ifdef KVM_CAP_IRQ_ROUTING
>=20
> @@ -933,6 +934,9 @@ struct kvm_s390_ucas_mapping {
> #define KVM_ARM_SET_DEVICE_ADDR	  _IOW(KVMIO,  0xab, struct =
kvm_arm_device_addr)
> /* Available with KVM_CAP_PPC_RTAS */
> #define KVM_PPC_RTAS_DEFINE_TOKEN _IOW(KVMIO,  0xac, struct =
kvm_rtas_token_args)
> +/* 0xad and 0xaf are already taken */

so 0xad and 0xaf are already taken? where?

> +/* Available with KVM_CAP_SPAPR_TCE_IOMMU */
> +#define KVM_CREATE_SPAPR_TCE_IOMMU _IOW(KVMIO,  0xaf, struct =
kvm_create_spapr_tce_iommu)

and why is this one 0xaf then?


Alex

>=20
> /* ioctl for vm fd */
> #define KVM_CREATE_DEVICE	  _IOWR(KVMIO,  0xe0, struct =
kvm_create_device)
> --=20
> 1.8.3.2
>=20
```