Commit b87cc116 authored by Bharata B Rao's avatar Bharata B Rao Committed by Michael Ellerman
Browse files

KVM: PPC: Book3S HV: Add KVM_CAP_PPC_RPT_INVALIDATE capability 



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: default avatarBharata B Rao <bharata@linux.ibm.com>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210621085003.904767-6-bharata@linux.ibm.com
parent 53324b51

Documentation/virt/kvm/api.rst

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@@ -6362,6 +6362,24 @@ default. 


See Documentation/x86/sgx/2.Kernel-internals.rst for more details.



7.26 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.

======================

arch/powerpc/kvm/powerpc.c

+3 −0
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@@ -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;

include/uapi/linux/kvm.h

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@@ -1082,6 +1082,7 @@ struct kvm_ppc_resize_hpt { 
#define KVM_CAP_SGX_ATTRIBUTE 196

#define KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 197

#define KVM_CAP_PTP_KVM 198

#define KVM_CAP_PPC_RPT_INVALIDATE 199



#ifdef KVM_CAP_IRQ_ROUTING