spapr/xive: add state synchronization with KVM

This extends the KVM XIVE device backend with 'synchronize_state'
methods used to retrieve the state from KVM. The HW state of the
sources, the KVM device and the thread interrupt contexts are
collected for the monitor usage and also migration.

These get operations rely on their KVM counterpart in the host kernel
which acts as a proxy for OPAL, the host firmware. The set operations
will be added for migration support later.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190513084245.25755-5-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 10 insertions, 0 deletions

diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 78047adb11..7f1c54a7b5 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -493,6 +493,16 @@ void xive_tctx_pic_print_info(XiveTCTX *tctx, Monitor *mon)
     int cpu_index = tctx->cs ? tctx->cs->cpu_index : -1;
     int i;
 
+    if (kvm_irqchip_in_kernel()) {
+        Error *local_err = NULL;
+
+        kvmppc_xive_cpu_synchronize_state(tctx, &local_err);
+        if (local_err) {
+            error_report_err(local_err);
+            return;
+        }
+    }
+
     monitor_printf(mon, "CPU[%04x]:   QW   NSR CPPR IPB LSMFB ACK# INC AGE PIPR"
                    "  W2\n", cpu_index);