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s390x/cpu topology: resetting the Topology-Change-Report

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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>
This commit is contained in:
Pierre Morel 2023-10-16 20:39:10 +02:00 • committed by Thomas Huth
parent a67f05b391
commit 3d6e75f4df
7 changed files with 52 additions and 0 deletions
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6
include/hw/s390x/cpu-topology.h
View file

@ -45,6 +45,7 @@ typedef QTAILQ_HEAD(, S390TopologyEntry) S390TopologyList;
#ifdef CONFIG_KVM
bool s390_has_topology(void);
void s390_topology_setup_cpu(MachineState *ms, S390CPU *cpu, Error **errp);
void s390_topology_reset(void);
#else
static inline bool s390_has_topology(void)
{
@ -53,6 +54,11 @@ static inline bool s390_has_topology(void)
static inline void s390_topology_setup_cpu(MachineState *ms,
S390CPU *cpu,
Error **errp) {}
static inline void s390_topology_reset(void)
{
/* Unreachable, CPU topology not implemented for TCG */
assert(false);
}
#endif
extern S390Topology s390_topology;