| Message ID | 20230914120650.1318932-12-nsg@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | s390x: CPU Topology | expand |
Nina Schoetterl-Glausch <nsg@linux.ibm.com> writes: > From: Pierre Morel <pmorel@linux.ibm.com> > > When the guest asks to change the polarization this change > is forwarded to the upper layer using QAPI. > The upper layer is supposed to take according decisions concerning > CPU provisioning. > > Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> > Reviewed-by: Thomas Huth <thuth@redhat.com> > Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> > Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> > Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com> > --- > qapi/machine-target.json | 33 +++++++++++++++++++++++++++++++++ > hw/s390x/cpu-topology.c | 2 ++ > 2 files changed, 35 insertions(+) > > diff --git a/qapi/machine-target.json b/qapi/machine-target.json > index e47a252bd9..276c3bf9d1 100644 > --- a/qapi/machine-target.json > +++ b/qapi/machine-target.json > @@ -412,3 +412,36 @@ > 'features': [ 'unstable' ], > 'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] } > } > + > +## > +# @CPU_POLARIZATION_CHANGE: > +# > +# Emitted when the guest asks to change the polarization. > +# > +# @polarization: polarization specified by the guest > +# > +# Features: Blank line, please. > +# @unstable: This command may still be modified. Event, not command. Suggest # @unstable: This event is experimental. > +# > +# The guest can tell the host (via the PTF instruction) whether the > +# CPUs should be provisioned using horizontal or vertical polarization. > +# > +# On horizontal polarization the host is expected to provision all vCPUs > +# equally. > +# On vertical polarization the host can provision each vCPU differently. > +# The guest will get information on the details of the provisioning > +# the next time it uses the STSI(15) instruction. Move this up before @polarization for consistency with other event documentation. > +# > +# Since: 8.2 > +# > +# Example: > +# > +# <- { "event": "CPU_POLARIZATION_CHANGE", > +# "data": { "polarization": "horizontal" }, > +# "timestamp": { "seconds": 1401385907, "microseconds": 422329 } } > +## > +{ 'event': 'CPU_POLARIZATION_CHANGE', > + 'data': { 'polarization': 'CpuS390Polarization' }, > + 'features': [ 'unstable' ], > + 'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] } > +} [...]
diff --git a/qapi/machine-target.json b/qapi/machine-target.json index e47a252bd9..276c3bf9d1 100644 --- a/qapi/machine-target.json +++ b/qapi/machine-target.json @@ -412,3 +412,36 @@ 'features': [ 'unstable' ], 'if': { 'all': [ 'TARGET_S390X' , 'CONFIG_KVM' ] } } + +## +# @CPU_POLARIZATION_CHANGE: +# +# Emitted when the guest asks to change the polarization. +# +# @polarization: polarization specified by the guest +# +# Features: +# @unstable: This command may still be modified. +# +# The guest can tell the host (via the PTF instruction) whether the +# CPUs should be provisioned using horizontal or vertical polarization. +# +# On horizontal polarization the host is expected to provision all vCPUs +# equally. +# On vertical polarization the host can provision each vCPU differently. +# The guest will get information on the details of the provisioning +# the next time it uses the STSI(15) instruction. +# +# Since: 8.2 +# +# Example: +# +# <- { "event": "CPU_POLARIZATION_CHANGE", +# "data": { "polarization": "horizontal" }, +# "timestamp": { "seconds": 1401385907, "microseconds": 422329 } } +## +{ 'event': 'CPU_POLARIZATION_CHANGE', + 'data': { 'polarization': 'CpuS390Polarization' }, + 'features': [ 'unstable' ], + 'if': { 'all': [ 'TARGET_S390X', 'CONFIG_KVM' ] } +} diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c index 28adfb3f84..18274db74c 100644 --- a/hw/s390x/cpu-topology.c +++ b/hw/s390x/cpu-topology.c @@ -24,6 +24,7 @@ #include "hw/s390x/s390-virtio-ccw.h" #include "hw/s390x/cpu-topology.h" #include "qapi/qapi-commands-machine-target.h" +#include "qapi/qapi-events-machine-target.h" /* * s390_topology is used to keep the topology information. @@ -136,6 +137,7 @@ void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra) } else { s390_topology.polarization = polarization; s390_cpu_topology_set_changed(true); + qapi_event_send_cpu_polarization_change(polarization); setcc(cpu, 0); } break;