diff options
Diffstat (limited to 'hw/intc')
| -rw-r--r-- | hw/intc/spapr_xive_kvm.c | 56 | ||||
| -rw-r--r-- | hw/intc/xics_kvm.c | 51 |
2 files changed, 107 insertions, 0 deletions
diff --git a/hw/intc/spapr_xive_kvm.c b/hw/intc/spapr_xive_kvm.c index 3999e4b7ed..259cd1db95 100644 --- a/hw/intc/spapr_xive_kvm.c +++ b/hw/intc/spapr_xive_kvm.c @@ -58,6 +58,16 @@ static void kvm_cpu_enable(CPUState *cs) QLIST_INSERT_HEAD(&kvm_enabled_cpus, enabled_cpu, node); } +static void kvm_cpu_disable_all(void) +{ + KVMEnabledCPU *enabled_cpu, *next; + + QLIST_FOREACH_SAFE(enabled_cpu, &kvm_enabled_cpus, node, next) { + QLIST_REMOVE(enabled_cpu, node); + g_free(enabled_cpu); + } +} + /* * XIVE Thread Interrupt Management context (KVM) */ @@ -709,3 +719,49 @@ void kvmppc_xive_connect(SpaprXive *xive, Error **errp) /* Map all regions */ spapr_xive_map_mmio(xive); } + +void kvmppc_xive_disconnect(SpaprXive *xive, Error **errp) +{ + XiveSource *xsrc; + size_t esb_len; + + /* The KVM XIVE device is not in use */ + if (!xive || xive->fd == -1) { + return; + } + + if (!kvmppc_has_cap_xive()) { + error_setg(errp, "IRQ_XIVE capability must be present for KVM"); + return; + } + + /* Clear the KVM mapping */ + xsrc = &xive->source; + esb_len = (1ull << xsrc->esb_shift) * xsrc->nr_irqs; + + sysbus_mmio_unmap(SYS_BUS_DEVICE(xive), 0); + munmap(xsrc->esb_mmap, esb_len); + + sysbus_mmio_unmap(SYS_BUS_DEVICE(xive), 1); + + sysbus_mmio_unmap(SYS_BUS_DEVICE(xive), 2); + munmap(xive->tm_mmap, 4ull << TM_SHIFT); + + /* + * When the KVM device fd is closed, the KVM device is destroyed + * and removed from the list of devices of the VM. The VCPU + * presenters are also detached from the device. + */ + close(xive->fd); + xive->fd = -1; + + kvm_kernel_irqchip = false; + kvm_msi_via_irqfd_allowed = false; + kvm_gsi_direct_mapping = false; + + /* Clear the local list of presenter (hotplug) */ + kvm_cpu_disable_all(); + + /* VM Change state handler is not needed anymore */ + qemu_del_vm_change_state_handler(xive->change); +} diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c index 78a252e6df..1185846ff1 100644 --- a/hw/intc/xics_kvm.c +++ b/hw/intc/xics_kvm.c @@ -51,6 +51,16 @@ typedef struct KVMEnabledICP { static QLIST_HEAD(, KVMEnabledICP) kvm_enabled_icps = QLIST_HEAD_INITIALIZER(&kvm_enabled_icps); +static void kvm_disable_icps(void) +{ + KVMEnabledICP *enabled_icp, *next; + + QLIST_FOREACH_SAFE(enabled_icp, &kvm_enabled_icps, node, next) { + QLIST_REMOVE(enabled_icp, node); + g_free(enabled_icp); + } +} + /* * ICP-KVM */ @@ -360,3 +370,44 @@ fail: kvmppc_define_rtas_kernel_token(0, "ibm,int-off"); return -1; } + +void xics_kvm_disconnect(SpaprMachineState *spapr, Error **errp) +{ + /* The KVM XICS device is not in use */ + if (kernel_xics_fd == -1) { + return; + } + + if (!kvm_enabled() || !kvm_check_extension(kvm_state, KVM_CAP_IRQ_XICS)) { + error_setg(errp, + "KVM and IRQ_XICS capability must be present for KVM XICS device"); + return; + } + + /* + * Only on P9 using the XICS-on XIVE KVM device: + * + * When the KVM device fd is closed, the device is destroyed and + * removed from the list of devices of the VM. The VCPU presenters + * are also detached from the device. + */ + close(kernel_xics_fd); + kernel_xics_fd = -1; + + spapr_rtas_unregister(RTAS_IBM_SET_XIVE); + spapr_rtas_unregister(RTAS_IBM_GET_XIVE); + spapr_rtas_unregister(RTAS_IBM_INT_OFF); + spapr_rtas_unregister(RTAS_IBM_INT_ON); + + kvmppc_define_rtas_kernel_token(0, "ibm,set-xive"); + kvmppc_define_rtas_kernel_token(0, "ibm,get-xive"); + kvmppc_define_rtas_kernel_token(0, "ibm,int-on"); + kvmppc_define_rtas_kernel_token(0, "ibm,int-off"); + + kvm_kernel_irqchip = false; + kvm_msi_via_irqfd_allowed = false; + kvm_gsi_direct_mapping = false; + + /* Clear the presenter from the VCPUs */ + kvm_disable_icps(); +} |