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Wed, 20 Sep 2023 11:49:53 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D8E65140273D; Wed, 20 Sep 2023 11:49:52 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id E261721E6900; Wed, 20 Sep 2023 13:49:51 +0200 (CEST) From: Markus Armbruster To: Nina Schoetterl-Glausch Cc: qemu-devel@nongnu.org, qemu-s390x@nongnu.org, Eduardo Habkost , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , David Hildenbrand , Halil Pasic , Christian Borntraeger , Eric Farman , Thomas Huth , Eric Blake , Michael Roth , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Yanan Wang , Daniel P. =?utf-8?Q?Berrang=C3=A9?= , Ilya Leoshkevich , Cleber Rosa , Wainer dos Santos Moschetta , Beraldo Leal , Pierre Morel Subject: Re: [PATCH v23 11/20] qapi/s390x/cpu topology: CPU_POLARIZATION_CHANGE qapi event References: <20230914120650.1318932-1-nsg@linux.ibm.com> <20230914120650.1318932-12-nsg@linux.ibm.com> Date: Wed, 20 Sep 2023 13:49:51 +0200 In-Reply-To: <20230914120650.1318932-12-nsg@linux.ibm.com> (Nina Schoetterl-Glausch's message of "Thu, 14 Sep 2023 14:06:41 +0200") Message-ID: <874jjphxnk.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Nina Schoetterl-Glausch writes: > From: Pierre Morel > > 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 > Reviewed-by: Thomas Huth > Reviewed-by: Nina Schoetterl-Glausch > Co-developed-by: Nina Schoetterl-Glausch > Signed-off-by: Nina Schoetterl-Glausch > --- > 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' ] } > +} [...]