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Diffstat (limited to 'hw/intc/xics_kvm.c')
-rw-r--r--hw/intc/xics_kvm.c51
1 files changed, 51 insertions, 0 deletions
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();
+}