On Thu, Mar 11, 2021 at 02:09:38PM +0530, Bharata B Rao wrote:
> Now that we have H_RPT_INVALIDATE fully implemented, enable
> support for the same via KVM_CAP_PPC_RPT_INVALIDATE KVM capability
>
> Signed-off-by: Bharata B Rao <bharata@xxxxxxxxxxxxx>
Reviewed-by: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
> ---
> Documentation/virt/kvm/api.rst | 18 ++++++++++++++++++
> arch/powerpc/kvm/powerpc.c | 3 +++
> include/uapi/linux/kvm.h | 1 +
> 3 files changed, 22 insertions(+)
>
> diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> index 1a2b5210cdbf..d769cef5f904 100644
> --- a/Documentation/virt/kvm/api.rst
> +++ b/Documentation/virt/kvm/api.rst
> @@ -6227,6 +6227,24 @@ KVM_RUN_BUS_LOCK flag is used to distinguish between them.
> This capability can be used to check / enable 2nd DAWR feature provided
> by POWER10 processor.
>
> +7.24 KVM_CAP_PPC_RPT_INVALIDATE
> +------------------------------
> +
> +:Capability: KVM_CAP_PPC_RPT_INVALIDATE
> +:Architectures: ppc
> +:Type: vm
> +
> +This capability indicates that the kernel is capable of handling
> +H_RPT_INVALIDATE hcall.
> +
> +In order to enable the use of H_RPT_INVALIDATE in the guest,
> +user space might have to advertise it for the guest. For example,
> +IBM pSeries (sPAPR) guest starts using it if "hcall-rpt-invalidate" is
> +present in the "ibm,hypertas-functions" device-tree property.
> +
> +This capability is enabled for hypervisors on platforms like POWER9
> +that support radix MMU.
> +
> 8. Other capabilities.
> ======================
>
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index a2a68a958fa0..be33b5321a76 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -682,6 +682,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> r = !!(hv_enabled && kvmppc_hv_ops->enable_dawr1 &&
> !kvmppc_hv_ops->enable_dawr1(NULL));
> break;
> + case KVM_CAP_PPC_RPT_INVALIDATE:
> + r = 1;
> + break;
> #endif
> default:
> r = 0;
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index f6afee209620..2b2370475cec 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1078,6 +1078,7 @@ struct kvm_ppc_resize_hpt {
> #define KVM_CAP_DIRTY_LOG_RING 192
> #define KVM_CAP_X86_BUS_LOCK_EXIT 193
> #define KVM_CAP_PPC_DAWR1 194
> +#define KVM_CAP_PPC_RPT_INVALIDATE 195
>
> #ifdef KVM_CAP_IRQ_ROUTING
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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