| Message ID | 20210311083939.595568-6-bharata@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | Support for H_RPT_INVALIDATE in PowerPC KVM | expand |
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@linux.ibm.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> > --- > 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 >
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
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@linux.ibm.com> --- Documentation/virt/kvm/api.rst | 18 ++++++++++++++++++ arch/powerpc/kvm/powerpc.c | 3 +++ include/uapi/linux/kvm.h | 1 + 3 files changed, 22 insertions(+)