diff options
| author | Pierre Morel <pmorel@linux.ibm.com> | 2023-10-16 20:39:10 +0200 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2023-10-20 07:16:53 +0200 |
| commit | 3d6e75f4df67980479cc0912b842202f2093aeeb (patch) | |
| tree | 449e0493a89d50da6c18bd0676da5be4ba8a2659 /target/s390x | |
| parent | a67f05b39106bf3477475297d8508bcb7d8eb0d8 (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 'target/s390x')
| -rw-r--r-- | target/s390x/cpu-sysemu.c | 13 | ||||
| -rw-r--r-- | target/s390x/cpu.h | 1 | ||||
| -rw-r--r-- | target/s390x/kvm/kvm.c | 17 | ||||
| -rw-r--r-- | target/s390x/kvm/kvm_s390x.h | 1 |
4 files changed, 32 insertions, 0 deletions
diff --git a/target/s390x/cpu-sysemu.c b/target/s390x/cpu-sysemu.c index 8112561e5e..1cd30c1d84 100644 --- a/target/s390x/cpu-sysemu.c +++ b/target/s390x/cpu-sysemu.c @@ -307,3 +307,16 @@ void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg) kvm_s390_set_diag318(cs, arg.host_ulong); } } + +void s390_cpu_topology_set_changed(bool changed) +{ + int ret; + + if (kvm_enabled()) { + ret = kvm_s390_topology_set_mtcr(changed); + if (ret) { + error_report("Failed to set Modified Topology Change Report: %s", + strerror(-ret)); + } + } +} diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 09bff39fe4..40c5cedd0e 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -654,6 +654,7 @@ typedef struct SysIBCPUListEntry { QEMU_BUILD_BUG_ON(sizeof(SysIBCPUListEntry) != 16); void insert_stsi_15_1_x(S390CPU *cpu, int sel2, uint64_t addr, uint8_t ar, uintptr_t ra); +void s390_cpu_topology_set_changed(bool changed); /* MMU defines */ #define ASCE_ORIGIN (~0xfffULL) /* segment table origin */ diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 53d6300809..d6bda3a2a8 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -2664,6 +2664,23 @@ int kvm_s390_get_zpci_op(void) return cap_zpci_op; } +int kvm_s390_topology_set_mtcr(uint64_t attr) +{ + struct kvm_device_attr attribute = { + .group = KVM_S390_VM_CPU_TOPOLOGY, + .attr = attr, + }; + + if (!s390_has_feat(S390_FEAT_CONFIGURATION_TOPOLOGY)) { + return 0; + } + if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_TOPOLOGY, attr)) { + return -ENOTSUP; + } + + return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attribute); +} + void kvm_arch_accel_class_init(ObjectClass *oc) { } diff --git a/target/s390x/kvm/kvm_s390x.h b/target/s390x/kvm/kvm_s390x.h index f9785564d0..649dae5948 100644 --- a/target/s390x/kvm/kvm_s390x.h +++ b/target/s390x/kvm/kvm_s390x.h @@ -47,5 +47,6 @@ void kvm_s390_crypto_reset(void); void kvm_s390_restart_interrupt(S390CPU *cpu); void kvm_s390_stop_interrupt(S390CPU *cpu); void kvm_s390_set_diag318(CPUState *cs, uint64_t diag318_info); +int kvm_s390_topology_set_mtcr(uint64_t attr); #endif /* KVM_S390X_H */ |