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authorPierre Morel <pmorel@linux.ibm.com>2023-10-16 20:39:10 +0200
committerThomas Huth <thuth@redhat.com>2023-10-20 07:16:53 +0200
commit3d6e75f4df67980479cc0912b842202f2093aeeb (patch)
tree449e0493a89d50da6c18bd0676da5be4ba8a2659 /hw/s390x
parenta67f05b39106bf3477475297d8508bcb7d8eb0d8 (diff)
s390x/cpu topology: resetting the Topology-Change-Report
During a subsystem reset the Topology-Change-Report is cleared by the machine. Let's ask KVM to clear the Modified Topology Change Report (MTCR) bit of the SCA in the case of a subsystem reset. 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> Message-ID: <20231016183925.2384704-7-nsg@linux.ibm.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'hw/s390x')
-rw-r--r--hw/s390x/cpu-topology.c11
-rw-r--r--hw/s390x/s390-virtio-ccw.c3
2 files changed, 14 insertions, 0 deletions
diff --git a/hw/s390x/cpu-topology.c b/hw/s390x/cpu-topology.c
index 13168341b6..7ec9319272 100644
--- a/hw/s390x/cpu-topology.c
+++ b/hw/s390x/cpu-topology.c
@@ -91,6 +91,17 @@ static void s390_topology_init(MachineState *ms)
}
/**
+ * s390_topology_reset:
+ *
+ * Generic reset for CPU topology, calls s390_topology_reset()
+ * to reset the kernel Modified Topology Change Record.
+ */
+void s390_topology_reset(void)
+{
+ s390_cpu_topology_set_changed(false);
+}
+
+/**
* s390_topology_cpu_default:
* @cpu: pointer to a S390CPU
* @errp: Error pointer
diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c
index 7fe2bce20c..6012165d41 100644
--- a/hw/s390x/s390-virtio-ccw.c
+++ b/hw/s390x/s390-virtio-ccw.c
@@ -124,6 +124,9 @@ static void subsystem_reset(void)
device_cold_reset(dev);
}
}
+ if (s390_has_topology()) {
+ s390_topology_reset();
+ }
}
static int virtio_ccw_hcall_notify(const uint64_t *args)