On Thu, Aug 15, 2013 at 05:49:26PM +1000, Alexey Kardashevskiy wrote:
> This is to reserve a capablity number for upcoming support
> of VFIO-IOMMU DMA operations in real mode.
>
> The last ioctl in the group which KVM_CREATE_SPAPR_TCE_IOMMU is added to
> is 0xac, the next two numbers are taken - 0xad for KVM_KVMCLOCK_CTRL and
0xac was also taken by KVM_SET_ONE_REG :(
> 0xae for KVM_ARM_VCPU_INIT. So the KVM_CREATE_SPAPR_TCE_IOMMU ioclt gets
> 0xaf.
>
> Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
>
> ---
> Changes:
> 2013/08/15 v8:
> * fixed comment again
>
> 2013/08/15:
> * fixed mistype in comments
> * fixed commit message which says what uses ioctls 0xad and 0xae
>
> 2013/07/16:
> * changed the number
>
> 2013/07/11:
> * changed order in a file, added comment about a gap in ioctl number
> ---
> include/uapi/linux/kvm.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 99c2533..bd94127 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
>
> #ifdef KVM_CAP_IRQ_ROUTING
>
> @@ -933,6 +934,11 @@ 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 is taken by KVM_KVMCLOCK_CTRL */
> +/* 0xae is taken by KVM_ARM_VCPU_INIT */
> +/* Available with KVM_CAP_SPAPR_TCE_IOMMU */
> +#define KVM_CREATE_SPAPR_TCE_IOMMU _IOW(KVMIO, 0xaf, \
> + struct kvm_create_spapr_tce_iommu)
>
Why not use KVM_CREATE_DEVICE API for that?
> /* ioctl for vm fd */
> #define KVM_CREATE_DEVICE _IOWR(KVMIO, 0xe0, struct kvm_create_device)
> --
> 1.8.3.2
--
Gleb.
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